http-push.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "pack.h"
   4 #include "fetch.h"
   5 #include "tag.h"
   6 #include "blob.h"
   7 #include "http.h"
   8 #include "refs.h"
   9 #include "diff.h"
  10 #include "revision.h"
  11 #include "exec_cmd.h"
  12
  13 #include <expat.h>
  14
  15 static const char http_push_usage[] =
  16 "git-http-push [--all] [--force] [--verbose] <remote> [<head>...]\n";
  17
  18 #ifndef XML_STATUS_OK
  19 enum XML_Status {
  20   XML_STATUS_OK = 1,
  21   XML_STATUS_ERROR = 0
  22 };
  23 #define XML_STATUS_OK    1
  24 #define XML_STATUS_ERROR 0
  25 #endif
  26
  27 #define PREV_BUF_SIZE 4096
  28 #define RANGE_HEADER_SIZE 30
  29
  30 /* DAV methods */
  31 #define DAV_LOCK "LOCK"
  32 #define DAV_MKCOL "MKCOL"
  33 #define DAV_MOVE "MOVE"
  34 #define DAV_PROPFIND "PROPFIND"
  35 #define DAV_PUT "PUT"
  36 #define DAV_UNLOCK "UNLOCK"
  37 #define DAV_DELETE "DELETE"
  38
  39 /* DAV lock flags */
  40 #define DAV_PROP_LOCKWR (1u << 0)
  41 #define DAV_PROP_LOCKEX (1u << 1)
  42 #define DAV_LOCK_OK (1u << 2)
  43
  44 /* DAV XML properties */
  45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
  46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
  47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
  48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
  49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
  50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
  51 #define DAV_PROPFIND_RESP ".multistatus.response"
  52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
  53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
  54
  55 /* DAV request body templates */
  56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
  57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
  58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
  59
  60 #define LOCK_TIME 600
  61 #define LOCK_REFRESH 30
  62
  63 /* bits #0-15 in revision.h */
  64
  65 #define LOCAL    (1u<<16)
  66 #define REMOTE   (1u<<17)
  67 #define FETCHING (1u<<18)
  68 #define PUSHING  (1u<<19)
  69
  70 /* We allow "recursive" symbolic refs. Only within reason, though */
  71 #define MAXDEPTH 5
  72
  73 static int pushing = 0;
  74 static int aborted = 0;
  75 static signed char remote_dir_exists[256];
  76
  77 static struct curl_slist *no_pragma_header;
  78 static struct curl_slist *default_headers;
  79
  80 static int push_verbosely = 0;
  81 static int push_all = 0;
  82 static int force_all = 0;
  83
  84 static struct object_list *objects = NULL;
  85
  86 struct repo
  87 {
  88         char *url;
  89         int path_len;
  90         int has_info_refs;
  91         int can_update_info_refs;
  92         int has_info_packs;
  93         struct packed_git *packs;
  94         struct remote_lock *locks;
  95 };
  96
  97 static struct repo *remote = NULL;
  98
  99 enum transfer_state {
 100         NEED_FETCH,
 101         RUN_FETCH_LOOSE,
 102         RUN_FETCH_PACKED,
 103         NEED_PUSH,
 104         RUN_MKCOL,
 105         RUN_PUT,
 106         RUN_MOVE,
 107         ABORTED,
 108         COMPLETE,
 109 };
 110
 111 struct transfer_request
 112 {
 113         struct object *obj;
 114         char *url;
 115         char *dest;
 116         struct remote_lock *lock;
 117         struct curl_slist *headers;
 118         struct buffer buffer;
 119         char filename[PATH_MAX];
 120         char tmpfile[PATH_MAX];
 121         int local_fileno;
 122         FILE *local_stream;
 123         enum transfer_state state;
 124         CURLcode curl_result;
 125         char errorstr[CURL_ERROR_SIZE];
 126         long http_code;
 127         unsigned char real_sha1[20];
 128         SHA_CTX c;
 129         z_stream stream;
 130         int zret;
 131         int rename;
 132         void *userData;
 133         struct active_request_slot *slot;
 134         struct transfer_request *next;
 135 };
 136
 137 static struct transfer_request *request_queue_head = NULL;
 138
 139 struct xml_ctx
 140 {
 141         char *name;
 142         int len;
 143         char *cdata;
 144         void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
 145         void *userData;
 146 };
 147
 148 struct remote_lock
 149 {
 150         char *url;
 151         char *owner;
 152         char *token;
 153         time_t start_time;
 154         long timeout;
 155         int refreshing;
 156         struct remote_lock *next;
 157 };
 158
 159 /* Flags that control remote_ls processing */
 160 #define PROCESS_FILES (1u << 0)
 161 #define PROCESS_DIRS  (1u << 1)
 162 #define RECURSIVE     (1u << 2)
 163
 164 /* Flags that remote_ls passes to callback functions */
 165 #define IS_DIR (1u << 0)
 166
 167 struct remote_ls_ctx
 168 {
 169         char *path;
 170         void (*userFunc)(struct remote_ls_ctx *ls);
 171         void *userData;
 172         int flags;
 173         char *dentry_name;
 174         int dentry_flags;
 175         struct remote_ls_ctx *parent;
 176 };
 177
 178 static void finish_request(struct transfer_request *request);
 179 static void release_request(struct transfer_request *request);
 180
 181 static void process_response(void *callback_data)
 182 {
 183         struct transfer_request *request =
 184                 (struct transfer_request *)callback_data;
 185
 186         finish_request(request);
 187 }
 188
 189 #ifdef USE_CURL_MULTI
 190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
 191                                void *data)
 192 {
 193         unsigned char expn[4096];
 194         size_t size = eltsize * nmemb;
 195         int posn = 0;
 196         struct transfer_request *request = (struct transfer_request *)data;
 197         do {
 198                 ssize_t retval = write(request->local_fileno,
 199                                        (char *) ptr + posn, size - posn);
 200                 if (retval < 0)
 201                         return posn;
 202                 posn += retval;
 203         } while (posn < size);
 204
 205         request->stream.avail_in = size;
 206         request->stream.next_in = ptr;
 207         do {
 208                 request->stream.next_out = expn;
 209                 request->stream.avail_out = sizeof(expn);
 210                 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
 211                 SHA1_Update(&request->c, expn,
 212                             sizeof(expn) - request->stream.avail_out);
 213         } while (request->stream.avail_in && request->zret == Z_OK);
 214         data_received++;
 215         return size;
 216 }
 217
 218 static void start_fetch_loose(struct transfer_request *request)
 219 {
 220         char *hex = sha1_to_hex(request->obj->sha1);
 221         char *filename;
 222         char prevfile[PATH_MAX];
 223         char *url;
 224         char *posn;
 225         int prevlocal;
 226         unsigned char prev_buf[PREV_BUF_SIZE];
 227         ssize_t prev_read = 0;
 228         long prev_posn = 0;
 229         char range[RANGE_HEADER_SIZE];
 230         struct curl_slist *range_header = NULL;
 231         struct active_request_slot *slot;
 232
 233         filename = sha1_file_name(request->obj->sha1);
 234         snprintf(request->filename, sizeof(request->filename), "%s", filename);
 235         snprintf(request->tmpfile, sizeof(request->tmpfile),
 236                  "%s.temp", filename);
 237
 238         snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
 239         unlink(prevfile);
 240         rename(request->tmpfile, prevfile);
 241         unlink(request->tmpfile);
 242
 243         if (request->local_fileno != -1)
 244                 error("fd leakage in start: %d", request->local_fileno);
 245         request->local_fileno = open(request->tmpfile,
 246                                      O_WRONLY | O_CREAT | O_EXCL, 0666);
 247         /* This could have failed due to the "lazy directory creation";
 248          * try to mkdir the last path component.
 249          */
 250         if (request->local_fileno < 0 && errno == ENOENT) {
 251                 char *dir = strrchr(request->tmpfile, '/');
 252                 if (dir) {
 253                         *dir = 0;
 254                         mkdir(request->tmpfile, 0777);
 255                         *dir = '/';
 256                 }
 257                 request->local_fileno = open(request->tmpfile,
 258                                              O_WRONLY | O_CREAT | O_EXCL, 0666);
 259         }
 260
 261         if (request->local_fileno < 0) {
 262                 request->state = ABORTED;
 263                 error("Couldn't create temporary file %s for %s: %s",
 264                       request->tmpfile, request->filename, strerror(errno));
 265                 return;
 266         }
 267
 268         memset(&request->stream, 0, sizeof(request->stream));
 269
 270         inflateInit(&request->stream);
 271
 272         SHA1_Init(&request->c);
 273
 274         url = xmalloc(strlen(remote->url) + 50);
 275         request->url = xmalloc(strlen(remote->url) + 50);
 276         strcpy(url, remote->url);
 277         posn = url + strlen(remote->url);
 278         strcpy(posn, "objects/");
 279         posn += 8;
 280         memcpy(posn, hex, 2);
 281         posn += 2;
 282         *(posn++) = '/';
 283         strcpy(posn, hex + 2);
 284         strcpy(request->url, url);
 285
 286         /* If a previous temp file is present, process what was already
 287            fetched. */
 288         prevlocal = open(prevfile, O_RDONLY);
 289         if (prevlocal != -1) {
 290                 do {
 291                         prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
 292                         if (prev_read>0) {
 293                                 if (fwrite_sha1_file(prev_buf,
 294                                                      1,
 295                                                      prev_read,
 296                                                      request) == prev_read) {
 297                                         prev_posn += prev_read;
 298                                 } else {
 299                                         prev_read = -1;
 300                                 }
 301                         }
 302                 } while (prev_read > 0);
 303                 close(prevlocal);
 304         }
 305         unlink(prevfile);
 306
 307         /* Reset inflate/SHA1 if there was an error reading the previous temp
 308            file; also rewind to the beginning of the local file. */
 309         if (prev_read == -1) {
 310                 memset(&request->stream, 0, sizeof(request->stream));
 311                 inflateInit(&request->stream);
 312                 SHA1_Init(&request->c);
 313                 if (prev_posn>0) {
 314                         prev_posn = 0;
 315                         lseek(request->local_fileno, SEEK_SET, 0);
 316                         ftruncate(request->local_fileno, 0);
 317                 }
 318         }
 319
 320         slot = get_active_slot();
 321         slot->callback_func = process_response;
 322         slot->callback_data = request;
 323         request->slot = slot;
 324
 325         curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
 326         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
 327         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 328         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 329         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 330
 331         /* If we have successfully processed data from a previous fetch
 332            attempt, only fetch the data we don't already have. */
 333         if (prev_posn>0) {
 334                 if (push_verbosely)
 335                         fprintf(stderr,
 336                                 "Resuming fetch of object %s at byte %ld\n",
 337                                 hex, prev_posn);
 338                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 339                 range_header = curl_slist_append(range_header, range);
 340                 curl_easy_setopt(slot->curl,
 341                                  CURLOPT_HTTPHEADER, range_header);
 342         }
 343
 344         /* Try to get the request started, abort the request on error */
 345         request->state = RUN_FETCH_LOOSE;
 346         if (!start_active_slot(slot)) {
 347                 fprintf(stderr, "Unable to start GET request\n");
 348                 remote->can_update_info_refs = 0;
 349                 release_request(request);
 350         }
 351 }
 352
 353 static void start_mkcol(struct transfer_request *request)
 354 {
 355         char *hex = sha1_to_hex(request->obj->sha1);
 356         struct active_request_slot *slot;
 357         char *posn;
 358
 359         request->url = xmalloc(strlen(remote->url) + 13);
 360         strcpy(request->url, remote->url);
 361         posn = request->url + strlen(remote->url);
 362         strcpy(posn, "objects/");
 363         posn += 8;
 364         memcpy(posn, hex, 2);
 365         posn += 2;
 366         strcpy(posn, "/");
 367
 368         slot = get_active_slot();
 369         slot->callback_func = process_response;
 370         slot->callback_data = request;
 371         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
 372         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 373         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 374         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
 375         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 376
 377         if (start_active_slot(slot)) {
 378                 request->slot = slot;
 379                 request->state = RUN_MKCOL;
 380         } else {
 381                 request->state = ABORTED;
 382                 free(request->url);
 383                 request->url = NULL;
 384         }
 385 }
 386 #endif
 387
 388 static void start_fetch_packed(struct transfer_request *request)
 389 {
 390         char *url;
 391         struct packed_git *target;
 392         FILE *packfile;
 393         char *filename;
 394         long prev_posn = 0;
 395         char range[RANGE_HEADER_SIZE];
 396         struct curl_slist *range_header = NULL;
 397
 398         struct transfer_request *check_request = request_queue_head;
 399         struct active_request_slot *slot;
 400
 401         target = find_sha1_pack(request->obj->sha1, remote->packs);
 402         if (!target) {
 403                 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
 404                 remote->can_update_info_refs = 0;
 405                 release_request(request);
 406                 return;
 407         }
 408
 409         fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
 410         fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
 411
 412         filename = sha1_pack_name(target->sha1);
 413         snprintf(request->filename, sizeof(request->filename), "%s", filename);
 414         snprintf(request->tmpfile, sizeof(request->tmpfile),
 415                  "%s.temp", filename);
 416
 417         url = xmalloc(strlen(remote->url) + 64);
 418         sprintf(url, "%sobjects/pack/pack-%s.pack",
 419                 remote->url, sha1_to_hex(target->sha1));
 420
 421         /* Make sure there isn't another open request for this pack */
 422         while (check_request) {
 423                 if (check_request->state == RUN_FETCH_PACKED &&
 424                     !strcmp(check_request->url, url)) {
 425                         free(url);
 426                         release_request(request);
 427                         return;
 428                 }
 429                 check_request = check_request->next;
 430         }
 431
 432         packfile = fopen(request->tmpfile, "a");
 433         if (!packfile) {
 434                 fprintf(stderr, "Unable to open local file %s for pack",
 435                         filename);
 436                 remote->can_update_info_refs = 0;
 437                 free(url);
 438                 return;
 439         }
 440
 441         slot = get_active_slot();
 442         slot->callback_func = process_response;
 443         slot->callback_data = request;
 444         request->slot = slot;
 445         request->local_stream = packfile;
 446         request->userData = target;
 447
 448         request->url = url;
 449         curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
 450         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
 451         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 452         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 453         slot->local = packfile;
 454
 455         /* If there is data present from a previous transfer attempt,
 456            resume where it left off */
 457         prev_posn = ftell(packfile);
 458         if (prev_posn>0) {
 459                 if (push_verbosely)
 460                         fprintf(stderr,
 461                                 "Resuming fetch of pack %s at byte %ld\n",
 462                                 sha1_to_hex(target->sha1), prev_posn);
 463                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 464                 range_header = curl_slist_append(range_header, range);
 465                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
 466         }
 467
 468         /* Try to get the request started, abort the request on error */
 469         request->state = RUN_FETCH_PACKED;
 470         if (!start_active_slot(slot)) {
 471                 fprintf(stderr, "Unable to start GET request\n");
 472                 remote->can_update_info_refs = 0;
 473                 release_request(request);
 474         }
 475 }
 476
 477 static void start_put(struct transfer_request *request)
 478 {
 479         char *hex = sha1_to_hex(request->obj->sha1);
 480         struct active_request_slot *slot;
 481         char *posn;
 482         char type[20];
 483         char hdr[50];
 484         void *unpacked;
 485         unsigned long len;
 486         int hdrlen;
 487         ssize_t size;
 488         z_stream stream;
 489
 490         unpacked = read_sha1_file(request->obj->sha1, type, &len);
 491         hdrlen = sprintf(hdr, "%s %lu", type, len) + 1;
 492
 493         /* Set it up */
 494         memset(&stream, 0, sizeof(stream));
 495         deflateInit(&stream, Z_BEST_COMPRESSION);
 496         size = deflateBound(&stream, len + hdrlen);
 497         request->buffer.buffer = xmalloc(size);
 498
 499         /* Compress it */
 500         stream.next_out = request->buffer.buffer;
 501         stream.avail_out = size;
 502
 503         /* First header.. */
 504         stream.next_in = (void *)hdr;
 505         stream.avail_in = hdrlen;
 506         while (deflate(&stream, 0) == Z_OK)
 507                 /* nothing */;
 508
 509         /* Then the data itself.. */
 510         stream.next_in = unpacked;
 511         stream.avail_in = len;
 512         while (deflate(&stream, Z_FINISH) == Z_OK)
 513                 /* nothing */;
 514         deflateEnd(&stream);
 515         free(unpacked);
 516
 517         request->buffer.size = stream.total_out;
 518         request->buffer.posn = 0;
 519
 520         request->url = xmalloc(strlen(remote->url) +
 521                                strlen(request->lock->token) + 51);
 522         strcpy(request->url, remote->url);
 523         posn = request->url + strlen(remote->url);
 524         strcpy(posn, "objects/");
 525         posn += 8;
 526         memcpy(posn, hex, 2);
 527         posn += 2;
 528         *(posn++) = '/';
 529         strcpy(posn, hex + 2);
 530         request->dest = xmalloc(strlen(request->url) + 14);
 531         sprintf(request->dest, "Destination: %s", request->url);
 532         posn += 38;
 533         *(posn++) = '.';
 534         strcpy(posn, request->lock->token);
 535
 536         slot = get_active_slot();
 537         slot->callback_func = process_response;
 538         slot->callback_data = request;
 539         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
 540         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
 541         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
 542         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 543         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
 544         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
 545         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
 546         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 547         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 548
 549         if (start_active_slot(slot)) {
 550                 request->slot = slot;
 551                 request->state = RUN_PUT;
 552         } else {
 553                 request->state = ABORTED;
 554                 free(request->url);
 555                 request->url = NULL;
 556         }
 557 }
 558
 559 static void start_move(struct transfer_request *request)
 560 {
 561         struct active_request_slot *slot;
 562         struct curl_slist *dav_headers = NULL;
 563
 564         slot = get_active_slot();
 565         slot->callback_func = process_response;
 566         slot->callback_data = request;
 567         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
 568         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
 569         dav_headers = curl_slist_append(dav_headers, request->dest);
 570         dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
 571         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 572         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 573         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 574
 575         if (start_active_slot(slot)) {
 576                 request->slot = slot;
 577                 request->state = RUN_MOVE;
 578         } else {
 579                 request->state = ABORTED;
 580                 free(request->url);
 581                 request->url = NULL;
 582         }
 583 }
 584
 585 static int refresh_lock(struct remote_lock *lock)
 586 {
 587         struct active_request_slot *slot;
 588         struct slot_results results;
 589         char *if_header;
 590         char timeout_header[25];
 591         struct curl_slist *dav_headers = NULL;
 592         int rc = 0;
 593
 594         lock->refreshing = 1;
 595
 596         if_header = xmalloc(strlen(lock->token) + 25);
 597         sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
 598         sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
 599         dav_headers = curl_slist_append(dav_headers, if_header);
 600         dav_headers = curl_slist_append(dav_headers, timeout_header);
 601
 602         slot = get_active_slot();
 603         slot->results = &results;
 604         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 605         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 606         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
 607         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
 608         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 609
 610         if (start_active_slot(slot)) {
 611                 run_active_slot(slot);
 612                 if (results.curl_result != CURLE_OK) {
 613                         fprintf(stderr, "LOCK HTTP error %ld\n",
 614                                 results.http_code);
 615                 } else {
 616                         lock->start_time = time(NULL);
 617                         rc = 1;
 618                 }
 619         }
 620
 621         lock->refreshing = 0;
 622         curl_slist_free_all(dav_headers);
 623         free(if_header);
 624
 625         return rc;
 626 }
 627
 628 static void check_locks(void)
 629 {
 630         struct remote_lock *lock = remote->locks;
 631         time_t current_time = time(NULL);
 632         int time_remaining;
 633
 634         while (lock) {
 635                 time_remaining = lock->start_time + lock->timeout -
 636                         current_time;
 637                 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
 638                         if (!refresh_lock(lock)) {
 639                                 fprintf(stderr,
 640                                         "Unable to refresh lock for %s\n",
 641                                         lock->url);
 642                                 aborted = 1;
 643                                 return;
 644                         }
 645                 }
 646                 lock = lock->next;
 647         }
 648 }
 649
 650 static void release_request(struct transfer_request *request)
 651 {
 652         struct transfer_request *entry = request_queue_head;
 653
 654         if (request == request_queue_head) {
 655                 request_queue_head = request->next;
 656         } else {
 657                 while (entry->next != NULL && entry->next != request)
 658                         entry = entry->next;
 659                 if (entry->next == request)
 660                         entry->next = entry->next->next;
 661         }
 662
 663         if (request->local_fileno != -1)
 664                 close(request->local_fileno);
 665         if (request->local_stream)
 666                 fclose(request->local_stream);
 667         if (request->url != NULL)
 668                 free(request->url);
 669         free(request);
 670 }
 671
 672 static void finish_request(struct transfer_request *request)
 673 {
 674         struct stat st;
 675         struct packed_git *target;
 676         struct packed_git **lst;
 677
 678         request->curl_result = request->slot->curl_result;
 679         request->http_code = request->slot->http_code;
 680         request->slot = NULL;
 681
 682         /* Keep locks active */
 683         check_locks();
 684
 685         if (request->headers != NULL)
 686                 curl_slist_free_all(request->headers);
 687
 688         /* URL is reused for MOVE after PUT */
 689         if (request->state != RUN_PUT) {
 690                 free(request->url);
 691                 request->url = NULL;
 692         }
 693
 694         if (request->state == RUN_MKCOL) {
 695                 if (request->curl_result == CURLE_OK ||
 696                     request->http_code == 405) {
 697                         remote_dir_exists[request->obj->sha1[0]] = 1;
 698                         start_put(request);
 699                 } else {
 700                         fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
 701                                 sha1_to_hex(request->obj->sha1),
 702                                 request->curl_result, request->http_code);
 703                         request->state = ABORTED;
 704                         aborted = 1;
 705                 }
 706         } else if (request->state == RUN_PUT) {
 707                 if (request->curl_result == CURLE_OK) {
 708                         start_move(request);
 709                 } else {
 710                         fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
 711                                 sha1_to_hex(request->obj->sha1),
 712                                 request->curl_result, request->http_code);
 713                         request->state = ABORTED;
 714                         aborted = 1;
 715                 }
 716         } else if (request->state == RUN_MOVE) {
 717                 if (request->curl_result == CURLE_OK) {
 718                         if (push_verbosely)
 719                                 fprintf(stderr, "    sent %s\n",
 720                                         sha1_to_hex(request->obj->sha1));
 721                         request->obj->flags |= REMOTE;
 722                         release_request(request);
 723                 } else {
 724                         fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
 725                                 sha1_to_hex(request->obj->sha1),
 726                                 request->curl_result, request->http_code);
 727                         request->state = ABORTED;
 728                         aborted = 1;
 729                 }
 730         } else if (request->state == RUN_FETCH_LOOSE) {
 731                 fchmod(request->local_fileno, 0444);
 732                 close(request->local_fileno); request->local_fileno = -1;
 733
 734                 if (request->curl_result != CURLE_OK &&
 735                     request->http_code != 416) {
 736                         if (stat(request->tmpfile, &st) == 0) {
 737                                 if (st.st_size == 0)
 738                                         unlink(request->tmpfile);
 739                         }
 740                 } else {
 741                         if (request->http_code == 416)
 742                                 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
 743
 744                         inflateEnd(&request->stream);
 745                         SHA1_Final(request->real_sha1, &request->c);
 746                         if (request->zret != Z_STREAM_END) {
 747                                 unlink(request->tmpfile);
 748                         } else if (memcmp(request->obj->sha1, request->real_sha1, 20)) {
 749                                 unlink(request->tmpfile);
 750                         } else {
 751                                 request->rename =
 752                                         move_temp_to_file(
 753                                                 request->tmpfile,
 754                                                 request->filename);
 755                                 if (request->rename == 0) {
 756                                         request->obj->flags |= (LOCAL | REMOTE);
 757                                 }
 758                         }
 759                 }
 760
 761                 /* Try fetching packed if necessary */
 762                 if (request->obj->flags & LOCAL)
 763                         release_request(request);
 764                 else
 765                         start_fetch_packed(request);
 766
 767         } else if (request->state == RUN_FETCH_PACKED) {
 768                 if (request->curl_result != CURLE_OK) {
 769                         fprintf(stderr, "Unable to get pack file %s\n%s",
 770                                 request->url, curl_errorstr);
 771                         remote->can_update_info_refs = 0;
 772                 } else {
 773                         fclose(request->local_stream);
 774                         request->local_stream = NULL;
 775                         if (!move_temp_to_file(request->tmpfile,
 776                                                request->filename)) {
 777                                 target = (struct packed_git *)request->userData;
 778                                 lst = &remote->packs;
 779                                 while (*lst != target)
 780                                         lst = &((*lst)->next);
 781                                 *lst = (*lst)->next;
 782
 783                                 if (!verify_pack(target, 0))
 784                                         install_packed_git(target);
 785                                 else
 786                                         remote->can_update_info_refs = 0;
 787                         }
 788                 }
 789                 release_request(request);
 790         }
 791 }
 792
 793 #ifdef USE_CURL_MULTI
 794 void fill_active_slots(void)
 795 {
 796         struct transfer_request *request = request_queue_head;
 797         struct transfer_request *next;
 798         struct active_request_slot *slot = active_queue_head;
 799         int num_transfers;
 800
 801         if (aborted)
 802                 return;
 803
 804         while (active_requests < max_requests && request != NULL) {
 805                 next = request->next;
 806                 if (request->state == NEED_FETCH) {
 807                         start_fetch_loose(request);
 808                 } else if (pushing && request->state == NEED_PUSH) {
 809                         if (remote_dir_exists[request->obj->sha1[0]] == 1) {
 810                                 start_put(request);
 811                         } else {
 812                                 start_mkcol(request);
 813                         }
 814                         curl_multi_perform(curlm, &num_transfers);
 815                 }
 816                 request = next;
 817         }
 818
 819         while (slot != NULL) {
 820                 if (!slot->in_use && slot->curl != NULL) {
 821                         curl_easy_cleanup(slot->curl);
 822                         slot->curl = NULL;
 823                 }
 824                 slot = slot->next;
 825         }
 826 }
 827 #endif
 828
 829 static void get_remote_object_list(unsigned char parent);
 830
 831 static void add_fetch_request(struct object *obj)
 832 {
 833         struct transfer_request *request;
 834
 835         check_locks();
 836
 837         /*
 838          * Don't fetch the object if it's known to exist locally
 839          * or is already in the request queue
 840          */
 841         if (remote_dir_exists[obj->sha1[0]] == -1)
 842                 get_remote_object_list(obj->sha1[0]);
 843         if (obj->flags & (LOCAL | FETCHING))
 844                 return;
 845
 846         obj->flags |= FETCHING;
 847         request = xmalloc(sizeof(*request));
 848         request->obj = obj;
 849         request->url = NULL;
 850         request->lock = NULL;
 851         request->headers = NULL;
 852         request->local_fileno = -1;
 853         request->local_stream = NULL;
 854         request->state = NEED_FETCH;
 855         request->next = request_queue_head;
 856         request_queue_head = request;
 857
 858 #ifdef USE_CURL_MULTI
 859         fill_active_slots();
 860         step_active_slots();
 861 #endif
 862 }
 863
 864 static int add_send_request(struct object *obj, struct remote_lock *lock)
 865 {
 866         struct transfer_request *request = request_queue_head;
 867         struct packed_git *target;
 868
 869         /* Keep locks active */
 870         check_locks();
 871
 872         /*
 873          * Don't push the object if it's known to exist on the remote
 874          * or is already in the request queue
 875          */
 876         if (remote_dir_exists[obj->sha1[0]] == -1)
 877                 get_remote_object_list(obj->sha1[0]);
 878         if (obj->flags & (REMOTE | PUSHING))
 879                 return 0;
 880         target = find_sha1_pack(obj->sha1, remote->packs);
 881         if (target) {
 882                 obj->flags |= REMOTE;
 883                 return 0;
 884         }
 885
 886         obj->flags |= PUSHING;
 887         request = xmalloc(sizeof(*request));
 888         request->obj = obj;
 889         request->url = NULL;
 890         request->lock = lock;
 891         request->headers = NULL;
 892         request->local_fileno = -1;
 893         request->local_stream = NULL;
 894         request->state = NEED_PUSH;
 895         request->next = request_queue_head;
 896         request_queue_head = request;
 897
 898 #ifdef USE_CURL_MULTI
 899         fill_active_slots();
 900         step_active_slots();
 901 #endif
 902
 903         return 1;
 904 }
 905
 906 static int fetch_index(unsigned char *sha1)
 907 {
 908         char *hex = sha1_to_hex(sha1);
 909         char *filename;
 910         char *url;
 911         char tmpfile[PATH_MAX];
 912         long prev_posn = 0;
 913         char range[RANGE_HEADER_SIZE];
 914         struct curl_slist *range_header = NULL;
 915
 916         FILE *indexfile;
 917         struct active_request_slot *slot;
 918         struct slot_results results;
 919
 920         /* Don't use the index if the pack isn't there */
 921         url = xmalloc(strlen(remote->url) + 64);
 922         sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
 923         slot = get_active_slot();
 924         slot->results = &results;
 925         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 926         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 927         if (start_active_slot(slot)) {
 928                 run_active_slot(slot);
 929                 if (results.curl_result != CURLE_OK) {
 930                         free(url);
 931                         return error("Unable to verify pack %s is available",
 932                                      hex);
 933                 }
 934         } else {
 935                 return error("Unable to start request");
 936         }
 937
 938         if (has_pack_index(sha1))
 939                 return 0;
 940
 941         if (push_verbosely)
 942                 fprintf(stderr, "Getting index for pack %s\n", hex);
 943
 944         sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
 945
 946         filename = sha1_pack_index_name(sha1);
 947         snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
 948         indexfile = fopen(tmpfile, "a");
 949         if (!indexfile)
 950                 return error("Unable to open local file %s for pack index",
 951                              filename);
 952
 953         slot = get_active_slot();
 954         slot->results = &results;
 955         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 956         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 957         curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
 958         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
 959         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 960         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 961         slot->local = indexfile;
 962
 963         /* If there is data present from a previous transfer attempt,
 964            resume where it left off */
 965         prev_posn = ftell(indexfile);
 966         if (prev_posn>0) {
 967                 if (push_verbosely)
 968                         fprintf(stderr,
 969                                 "Resuming fetch of index for pack %s at byte %ld\n",
 970                                 hex, prev_posn);
 971                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 972                 range_header = curl_slist_append(range_header, range);
 973                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
 974         }
 975
 976         if (start_active_slot(slot)) {
 977                 run_active_slot(slot);
 978                 if (results.curl_result != CURLE_OK) {
 979                         free(url);
 980                         fclose(indexfile);
 981                         return error("Unable to get pack index %s\n%s", url,
 982                                      curl_errorstr);
 983                 }
 984         } else {
 985                 free(url);
 986                 fclose(indexfile);
 987                 return error("Unable to start request");
 988         }
 989
 990         free(url);
 991         fclose(indexfile);
 992
 993         return move_temp_to_file(tmpfile, filename);
 994 }
 995
 996 static int setup_index(unsigned char *sha1)
 997 {
 998         struct packed_git *new_pack;
 999
1000         if (fetch_index(sha1))
1001                 return -1;
1002
1003         new_pack = parse_pack_index(sha1);
1004         new_pack->next = remote->packs;
1005         remote->packs = new_pack;
1006         return 0;
1007 }
1008
1009 static int fetch_indices(void)
1010 {
1011         unsigned char sha1[20];
1012         char *url;
1013         struct buffer buffer;
1014         char *data;
1015         int i = 0;
1016
1017         struct active_request_slot *slot;
1018         struct slot_results results;
1019
1020         data = xcalloc(1, 4096);
1021         buffer.size = 4096;
1022         buffer.posn = 0;
1023         buffer.buffer = data;
1024
1025         if (push_verbosely)
1026                 fprintf(stderr, "Getting pack list\n");
1027
1028         url = xmalloc(strlen(remote->url) + 20);
1029         sprintf(url, "%sobjects/info/packs", remote->url);
1030
1031         slot = get_active_slot();
1032         slot->results = &results;
1033         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1034         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1035         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1036         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1037         if (start_active_slot(slot)) {
1038                 run_active_slot(slot);
1039                 if (results.curl_result != CURLE_OK) {
1040                         free(buffer.buffer);
1041                         free(url);
1042                         if (results.http_code == 404)
1043                                 return 0;
1044                         else
1045                                 return error("%s", curl_errorstr);
1046                 }
1047         } else {
1048                 free(buffer.buffer);
1049                 free(url);
1050                 return error("Unable to start request");
1051         }
1052         free(url);
1053
1054         data = buffer.buffer;
1055         while (i < buffer.posn) {
1056                 switch (data[i]) {
1057                 case 'P':
1058                         i++;
1059                         if (i + 52 < buffer.posn &&
1060                             !strncmp(data + i, " pack-", 6) &&
1061                             !strncmp(data + i + 46, ".pack\n", 6)) {
1062                                 get_sha1_hex(data + i + 6, sha1);
1063                                 setup_index(sha1);
1064                                 i += 51;
1065                                 break;
1066                         }
1067                 default:
1068                         while (data[i] != '\n')
1069                                 i++;
1070                 }
1071                 i++;
1072         }
1073
1074         free(buffer.buffer);
1075         return 0;
1076 }
1077
1078 static inline int needs_quote(int ch)
1079 {
1080         if (((ch >= 'A') && (ch <= 'Z'))
1081                         || ((ch >= 'a') && (ch <= 'z'))
1082                         || ((ch >= '0') && (ch <= '9'))
1083                         || (ch == '/')
1084                         || (ch == '-')
1085                         || (ch == '.'))
1086                 return 0;
1087         return 1;
1088 }
1089
1090 static inline int hex(int v)
1091 {
1092         if (v < 10) return '0' + v;
1093         else return 'A' + v - 10;
1094 }
1095
1096 static char *quote_ref_url(const char *base, const char *ref)
1097 {
1098         const char *cp;
1099         char *dp, *qref;
1100         int len, baselen, ch;
1101
1102         baselen = strlen(base);
1103         len = baselen + 1;
1104         for (cp = ref; (ch = *cp) != 0; cp++, len++)
1105                 if (needs_quote(ch))
1106                         len += 2; /* extra two hex plus replacement % */
1107         qref = xmalloc(len);
1108         memcpy(qref, base, baselen);
1109         for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1110                 if (needs_quote(ch)) {
1111                         *dp++ = '%';
1112                         *dp++ = hex((ch >> 4) & 0xF);
1113                         *dp++ = hex(ch & 0xF);
1114                 }
1115                 else
1116                         *dp++ = ch;
1117         }
1118         *dp = 0;
1119
1120         return qref;
1121 }
1122
1123 int fetch_ref(char *ref, unsigned char *sha1)
1124 {
1125         char *url;
1126         char hex[42];
1127         struct buffer buffer;
1128         char *base = remote->url;
1129         struct active_request_slot *slot;
1130         struct slot_results results;
1131         buffer.size = 41;
1132         buffer.posn = 0;
1133         buffer.buffer = hex;
1134         hex[41] = '\0';
1135
1136         url = quote_ref_url(base, ref);
1137         slot = get_active_slot();
1138         slot->results = &results;
1139         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1140         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1141         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1142         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1143         if (start_active_slot(slot)) {
1144                 run_active_slot(slot);
1145                 if (results.curl_result != CURLE_OK)
1146                         return error("Couldn't get %s for %s\n%s",
1147                                      url, ref, curl_errorstr);
1148         } else {
1149                 return error("Unable to start request");
1150         }
1151
1152         hex[40] = '\0';
1153         get_sha1_hex(hex, sha1);
1154         return 0;
1155 }
1156
1157 static void one_remote_object(const char *hex)
1158 {
1159         unsigned char sha1[20];
1160         struct object *obj;
1161
1162         if (get_sha1_hex(hex, sha1) != 0)
1163                 return;
1164
1165         obj = lookup_object(sha1);
1166         if (!obj)
1167                 obj = parse_object(sha1);
1168
1169         /* Ignore remote objects that don't exist locally */
1170         if (!obj)
1171                 return;
1172
1173         obj->flags |= REMOTE;
1174         if (!object_list_contains(objects, obj))
1175                 add_object(obj, &objects, NULL, "");
1176 }
1177
1178 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1179 {
1180         int *lock_flags = (int *)ctx->userData;
1181
1182         if (tag_closed) {
1183                 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1184                         if ((*lock_flags & DAV_PROP_LOCKEX) &&
1185                             (*lock_flags & DAV_PROP_LOCKWR)) {
1186                                 *lock_flags |= DAV_LOCK_OK;
1187                         }
1188                         *lock_flags &= DAV_LOCK_OK;
1189                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1190                         *lock_flags |= DAV_PROP_LOCKWR;
1191                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1192                         *lock_flags |= DAV_PROP_LOCKEX;
1193                 }
1194         }
1195 }
1196
1197 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1198 {
1199         struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1200
1201         if (tag_closed && ctx->cdata) {
1202                 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1203                         lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1204                         strcpy(lock->owner, ctx->cdata);
1205                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1206                         if (!strncmp(ctx->cdata, "Second-", 7))
1207                                 lock->timeout =
1208                                         strtol(ctx->cdata + 7, NULL, 10);
1209                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1210                         if (!strncmp(ctx->cdata, "opaquelocktoken:", 16)) {
1211                                 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1212                                 strcpy(lock->token, ctx->cdata + 16);
1213                         }
1214                 }
1215         }
1216 }
1217
1218 static void one_remote_ref(char *refname);
1219
1220 static void
1221 xml_start_tag(void *userData, const char *name, const char **atts)
1222 {
1223         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1224         const char *c = strchr(name, ':');
1225         int new_len;
1226
1227         if (c == NULL)
1228                 c = name;
1229         else
1230                 c++;
1231
1232         new_len = strlen(ctx->name) + strlen(c) + 2;
1233
1234         if (new_len > ctx->len) {
1235                 ctx->name = xrealloc(ctx->name, new_len);
1236                 ctx->len = new_len;
1237         }
1238         strcat(ctx->name, ".");
1239         strcat(ctx->name, c);
1240
1241         if (ctx->cdata) {
1242                 free(ctx->cdata);
1243                 ctx->cdata = NULL;
1244         }
1245
1246         ctx->userFunc(ctx, 0);
1247 }
1248
1249 static void
1250 xml_end_tag(void *userData, const char *name)
1251 {
1252         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1253         const char *c = strchr(name, ':');
1254         char *ep;
1255
1256         ctx->userFunc(ctx, 1);
1257
1258         if (c == NULL)
1259                 c = name;
1260         else
1261                 c++;
1262
1263         ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1264         *ep = 0;
1265 }
1266
1267 static void
1268 xml_cdata(void *userData, const XML_Char *s, int len)
1269 {
1270         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1271         if (ctx->cdata)
1272                 free(ctx->cdata);
1273         ctx->cdata = xmalloc(len + 1);
1274         safe_strncpy(ctx->cdata, s, len + 1);
1275 }
1276
1277 static struct remote_lock *lock_remote(char *path, long timeout)
1278 {
1279         struct active_request_slot *slot;
1280         struct slot_results results;
1281         struct buffer out_buffer;
1282         struct buffer in_buffer;
1283         char *out_data;
1284         char *in_data;
1285         char *url;
1286         char *ep;
1287         char timeout_header[25];
1288         struct remote_lock *lock = NULL;
1289         XML_Parser parser = XML_ParserCreate(NULL);
1290         enum XML_Status result;
1291         struct curl_slist *dav_headers = NULL;
1292         struct xml_ctx ctx;
1293
1294         url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1295         sprintf(url, "%s%s", remote->url, path);
1296
1297         /* Make sure leading directories exist for the remote ref */
1298         ep = strchr(url + strlen(remote->url) + 11, '/');
1299         while (ep) {
1300                 *ep = 0;
1301                 slot = get_active_slot();
1302                 slot->results = &results;
1303                 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1304                 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1305                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1306                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1307                 if (start_active_slot(slot)) {
1308                         run_active_slot(slot);
1309                         if (results.curl_result != CURLE_OK &&
1310                             results.http_code != 405) {
1311                                 fprintf(stderr,
1312                                         "Unable to create branch path %s\n",
1313                                         url);
1314                                 free(url);
1315                                 return NULL;
1316                         }
1317                 } else {
1318                         fprintf(stderr, "Unable to start MKCOL request\n");
1319                         free(url);
1320                         return NULL;
1321                 }
1322                 *ep = '/';
1323                 ep = strchr(ep + 1, '/');
1324         }
1325
1326         out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1327         out_data = xmalloc(out_buffer.size + 1);
1328         snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1329         out_buffer.posn = 0;
1330         out_buffer.buffer = out_data;
1331
1332         in_buffer.size = 4096;
1333         in_data = xmalloc(in_buffer.size);
1334         in_buffer.posn = 0;
1335         in_buffer.buffer = in_data;
1336
1337         sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1338         dav_headers = curl_slist_append(dav_headers, timeout_header);
1339         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1340
1341         slot = get_active_slot();
1342         slot->results = &results;
1343         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1344         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1345         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1346         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1347         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1348         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1349         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1350         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1351         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1352
1353         lock = xcalloc(1, sizeof(*lock));
1354         lock->timeout = -1;
1355
1356         if (start_active_slot(slot)) {
1357                 run_active_slot(slot);
1358                 if (results.curl_result == CURLE_OK) {
1359                         ctx.name = xcalloc(10, 1);
1360                         ctx.len = 0;
1361                         ctx.cdata = NULL;
1362                         ctx.userFunc = handle_new_lock_ctx;
1363                         ctx.userData = lock;
1364                         XML_SetUserData(parser, &ctx);
1365                         XML_SetElementHandler(parser, xml_start_tag,
1366                                               xml_end_tag);
1367                         XML_SetCharacterDataHandler(parser, xml_cdata);
1368                         result = XML_Parse(parser, in_buffer.buffer,
1369                                            in_buffer.posn, 1);
1370                         free(ctx.name);
1371                         if (result != XML_STATUS_OK) {
1372                                 fprintf(stderr, "XML error: %s\n",
1373                                         XML_ErrorString(
1374                                                 XML_GetErrorCode(parser)));
1375                                 lock->timeout = -1;
1376                         }
1377                 }
1378         } else {
1379                 fprintf(stderr, "Unable to start LOCK request\n");
1380         }
1381
1382         curl_slist_free_all(dav_headers);
1383         free(out_data);
1384         free(in_data);
1385
1386         if (lock->token == NULL || lock->timeout <= 0) {
1387                 if (lock->token != NULL)
1388                         free(lock->token);
1389                 if (lock->owner != NULL)
1390                         free(lock->owner);
1391                 free(url);
1392                 free(lock);
1393                 lock = NULL;
1394         } else {
1395                 lock->url = url;
1396                 lock->start_time = time(NULL);
1397                 lock->next = remote->locks;
1398                 remote->locks = lock;
1399         }
1400
1401         return lock;
1402 }
1403
1404 static int unlock_remote(struct remote_lock *lock)
1405 {
1406         struct active_request_slot *slot;
1407         struct slot_results results;
1408         struct remote_lock *prev = remote->locks;
1409         char *lock_token_header;
1410         struct curl_slist *dav_headers = NULL;
1411         int rc = 0;
1412
1413         lock_token_header = xmalloc(strlen(lock->token) + 31);
1414         sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1415                 lock->token);
1416         dav_headers = curl_slist_append(dav_headers, lock_token_header);
1417
1418         slot = get_active_slot();
1419         slot->results = &results;
1420         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1421         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1422         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1423         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1424
1425         if (start_active_slot(slot)) {
1426                 run_active_slot(slot);
1427                 if (results.curl_result == CURLE_OK)
1428                         rc = 1;
1429                 else
1430                         fprintf(stderr, "UNLOCK HTTP error %ld\n",
1431                                 results.http_code);
1432         } else {
1433                 fprintf(stderr, "Unable to start UNLOCK request\n");
1434         }
1435
1436         curl_slist_free_all(dav_headers);
1437         free(lock_token_header);
1438
1439         if (remote->locks == lock) {
1440                 remote->locks = lock->next;
1441         } else {
1442                 while (prev && prev->next != lock)
1443                         prev = prev->next;
1444                 if (prev)
1445                         prev->next = prev->next->next;
1446         }
1447
1448         if (lock->owner != NULL)
1449                 free(lock->owner);
1450         free(lock->url);
1451         free(lock->token);
1452         free(lock);
1453
1454         return rc;
1455 }
1456
1457 static void remote_ls(const char *path, int flags,
1458                       void (*userFunc)(struct remote_ls_ctx *ls),
1459                       void *userData);
1460
1461 static void process_ls_object(struct remote_ls_ctx *ls)
1462 {
1463         unsigned int *parent = (unsigned int *)ls->userData;
1464         char *path = ls->dentry_name;
1465         char *obj_hex;
1466
1467         if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1468                 remote_dir_exists[*parent] = 1;
1469                 return;
1470         }
1471
1472         if (strlen(path) != 49)
1473                 return;
1474         path += 8;
1475         obj_hex = xmalloc(strlen(path));
1476         safe_strncpy(obj_hex, path, 3);
1477         strcpy(obj_hex + 2, path + 3);
1478         one_remote_object(obj_hex);
1479         free(obj_hex);
1480 }
1481
1482 static void process_ls_ref(struct remote_ls_ctx *ls)
1483 {
1484         if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1485                 fprintf(stderr, "  %s\n", ls->dentry_name);
1486                 return;
1487         }
1488
1489         if (!(ls->dentry_flags & IS_DIR))
1490                 one_remote_ref(ls->dentry_name);
1491 }
1492
1493 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1494 {
1495         struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1496
1497         if (tag_closed) {
1498                 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1499                         if (ls->dentry_flags & IS_DIR) {
1500                                 if (ls->flags & PROCESS_DIRS) {
1501                                         ls->userFunc(ls);
1502                                 }
1503                                 if (strcmp(ls->dentry_name, ls->path) &&
1504                                     ls->flags & RECURSIVE) {
1505                                         remote_ls(ls->dentry_name,
1506                                                   ls->flags,
1507                                                   ls->userFunc,
1508                                                   ls->userData);
1509                                 }
1510                         } else if (ls->flags & PROCESS_FILES) {
1511                                 ls->userFunc(ls);
1512                         }
1513                 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1514                         ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1515                                                   remote->path_len + 1);
1516                         strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1517                 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1518                         ls->dentry_flags |= IS_DIR;
1519                 }
1520         } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1521                 if (ls->dentry_name) {
1522                         free(ls->dentry_name);
1523                 }
1524                 ls->dentry_name = NULL;
1525                 ls->dentry_flags = 0;
1526         }
1527 }
1528
1529 static void remote_ls(const char *path, int flags,
1530                       void (*userFunc)(struct remote_ls_ctx *ls),
1531                       void *userData)
1532 {
1533         char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1534         struct active_request_slot *slot;
1535         struct slot_results results;
1536         struct buffer in_buffer;
1537         struct buffer out_buffer;
1538         char *in_data;
1539         char *out_data;
1540         XML_Parser parser = XML_ParserCreate(NULL);
1541         enum XML_Status result;
1542         struct curl_slist *dav_headers = NULL;
1543         struct xml_ctx ctx;
1544         struct remote_ls_ctx ls;
1545
1546         ls.flags = flags;
1547         ls.path = strdup(path);
1548         ls.dentry_name = NULL;
1549         ls.dentry_flags = 0;
1550         ls.userData = userData;
1551         ls.userFunc = userFunc;
1552
1553         sprintf(url, "%s%s", remote->url, path);
1554
1555         out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1556         out_data = xmalloc(out_buffer.size + 1);
1557         snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1558         out_buffer.posn = 0;
1559         out_buffer.buffer = out_data;
1560
1561         in_buffer.size = 4096;
1562         in_data = xmalloc(in_buffer.size);
1563         in_buffer.posn = 0;
1564         in_buffer.buffer = in_data;
1565
1566         dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1567         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1568
1569         slot = get_active_slot();
1570         slot->results = &results;
1571         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1572         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1573         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1574         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1575         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1576         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1577         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1578         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1579         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1580
1581         if (start_active_slot(slot)) {
1582                 run_active_slot(slot);
1583                 if (results.curl_result == CURLE_OK) {
1584                         ctx.name = xcalloc(10, 1);
1585                         ctx.len = 0;
1586                         ctx.cdata = NULL;
1587                         ctx.userFunc = handle_remote_ls_ctx;
1588                         ctx.userData = &ls;
1589                         XML_SetUserData(parser, &ctx);
1590                         XML_SetElementHandler(parser, xml_start_tag,
1591                                               xml_end_tag);
1592                         XML_SetCharacterDataHandler(parser, xml_cdata);
1593                         result = XML_Parse(parser, in_buffer.buffer,
1594                                            in_buffer.posn, 1);
1595                         free(ctx.name);
1596
1597                         if (result != XML_STATUS_OK) {
1598                                 fprintf(stderr, "XML error: %s\n",
1599                                         XML_ErrorString(
1600                                                 XML_GetErrorCode(parser)));
1601                         }
1602                 }
1603         } else {
1604                 fprintf(stderr, "Unable to start PROPFIND request\n");
1605         }
1606
1607         free(ls.path);
1608         free(url);
1609         free(out_data);
1610         free(in_buffer.buffer);
1611         curl_slist_free_all(dav_headers);
1612 }
1613
1614 static void get_remote_object_list(unsigned char parent)
1615 {
1616         char path[] = "objects/XX/";
1617         static const char hex[] = "0123456789abcdef";
1618         unsigned int val = parent;
1619
1620         path[8] = hex[val >> 4];
1621         path[9] = hex[val & 0xf];
1622         remote_dir_exists[val] = 0;
1623         remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1624                   process_ls_object, &val);
1625 }
1626
1627 static int locking_available(void)
1628 {
1629         struct active_request_slot *slot;
1630         struct slot_results results;
1631         struct buffer in_buffer;
1632         struct buffer out_buffer;
1633         char *in_data;
1634         char *out_data;
1635         XML_Parser parser = XML_ParserCreate(NULL);
1636         enum XML_Status result;
1637         struct curl_slist *dav_headers = NULL;
1638         struct xml_ctx ctx;
1639         int lock_flags = 0;
1640
1641         out_buffer.size =
1642                 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1643                 strlen(remote->url) - 2;
1644         out_data = xmalloc(out_buffer.size + 1);
1645         snprintf(out_data, out_buffer.size + 1,
1646                  PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1647         out_buffer.posn = 0;
1648         out_buffer.buffer = out_data;
1649
1650         in_buffer.size = 4096;
1651         in_data = xmalloc(in_buffer.size);
1652         in_buffer.posn = 0;
1653         in_buffer.buffer = in_data;
1654
1655         dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1656         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1657
1658         slot = get_active_slot();
1659         slot->results = &results;
1660         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1661         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1662         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1663         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1664         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1665         curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1666         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1667         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1668         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1669
1670         if (start_active_slot(slot)) {
1671                 run_active_slot(slot);
1672                 if (results.curl_result == CURLE_OK) {
1673                         ctx.name = xcalloc(10, 1);
1674                         ctx.len = 0;
1675                         ctx.cdata = NULL;
1676                         ctx.userFunc = handle_lockprop_ctx;
1677                         ctx.userData = &lock_flags;
1678                         XML_SetUserData(parser, &ctx);
1679                         XML_SetElementHandler(parser, xml_start_tag,
1680                                               xml_end_tag);
1681                         result = XML_Parse(parser, in_buffer.buffer,
1682                                            in_buffer.posn, 1);
1683                         free(ctx.name);
1684
1685                         if (result != XML_STATUS_OK) {
1686                                 fprintf(stderr, "XML error: %s\n",
1687                                         XML_ErrorString(
1688                                                 XML_GetErrorCode(parser)));
1689                                 lock_flags = 0;
1690                         }
1691                 }
1692         } else {
1693                 fprintf(stderr, "Unable to start PROPFIND request\n");
1694         }
1695
1696         free(out_data);
1697         free(in_buffer.buffer);
1698         curl_slist_free_all(dav_headers);
1699
1700         return lock_flags;
1701 }
1702
1703 static struct object_list **process_blob(struct blob *blob,
1704                                          struct object_list **p,
1705                                          struct name_path *path,
1706                                          const char *name)
1707 {
1708         struct object *obj = &blob->object;
1709
1710         obj->flags |= LOCAL;
1711
1712         if (obj->flags & (UNINTERESTING | SEEN))
1713                 return p;
1714
1715         obj->flags |= SEEN;
1716         name = strdup(name);
1717         return add_object(obj, p, path, name);
1718 }
1719
1720 static struct object_list **process_tree(struct tree *tree,
1721                                          struct object_list **p,
1722                                          struct name_path *path,
1723                                          const char *name)
1724 {
1725         struct object *obj = &tree->object;
1726         struct tree_desc desc;
1727         struct name_entry entry;
1728         struct name_path me;
1729
1730         obj->flags |= LOCAL;
1731
1732         if (obj->flags & (UNINTERESTING | SEEN))
1733                 return p;
1734         if (parse_tree(tree) < 0)
1735                 die("bad tree object %s", sha1_to_hex(obj->sha1));
1736
1737         obj->flags |= SEEN;
1738         name = strdup(name);
1739         p = add_object(obj, p, NULL, name);
1740         me.up = path;
1741         me.elem = name;
1742         me.elem_len = strlen(name);
1743
1744         desc.buf = tree->buffer;
1745         desc.size = tree->size;
1746
1747         while (tree_entry(&desc, &entry)) {
1748                 if (S_ISDIR(entry.mode))
1749                         p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1750                 else
1751                         p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1752         }
1753         free(tree->buffer);
1754         tree->buffer = NULL;
1755         return p;
1756 }
1757
1758 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1759 {
1760         struct commit *commit;
1761         struct object_list **p = &objects, *pending;
1762         int count = 0;
1763
1764         while ((commit = get_revision(revs)) != NULL) {
1765                 p = process_tree(commit->tree, p, NULL, "");
1766                 commit->object.flags |= LOCAL;
1767                 if (!(commit->object.flags & UNINTERESTING))
1768                         count += add_send_request(&commit->object, lock);
1769         }
1770
1771         for (pending = revs->pending_objects; pending; pending = pending->next) {
1772                 struct object *obj = pending->item;
1773                 const char *name = pending->name;
1774
1775                 if (obj->flags & (UNINTERESTING | SEEN))
1776                         continue;
1777                 if (obj->type == tag_type) {
1778                         obj->flags |= SEEN;
1779                         p = add_object(obj, p, NULL, name);
1780                         continue;
1781                 }
1782                 if (obj->type == tree_type) {
1783                         p = process_tree((struct tree *)obj, p, NULL, name);
1784                         continue;
1785                 }
1786                 if (obj->type == blob_type) {
1787                         p = process_blob((struct blob *)obj, p, NULL, name);
1788                         continue;
1789                 }
1790                 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1791         }
1792
1793         while (objects) {
1794                 if (!(objects->item->flags & UNINTERESTING))
1795                         count += add_send_request(objects->item, lock);
1796                 objects = objects->next;
1797         }
1798
1799         return count;
1800 }
1801
1802 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1803 {
1804         struct active_request_slot *slot;
1805         struct slot_results results;
1806         char *out_data;
1807         char *if_header;
1808         struct buffer out_buffer;
1809         struct curl_slist *dav_headers = NULL;
1810         int i;
1811
1812         if_header = xmalloc(strlen(lock->token) + 25);
1813         sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1814         dav_headers = curl_slist_append(dav_headers, if_header);
1815
1816         out_buffer.size = 41;
1817         out_data = xmalloc(out_buffer.size + 1);
1818         i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1819         if (i != out_buffer.size) {
1820                 fprintf(stderr, "Unable to initialize PUT request body\n");
1821                 return 0;
1822         }
1823         out_buffer.posn = 0;
1824         out_buffer.buffer = out_data;
1825
1826         slot = get_active_slot();
1827         slot->results = &results;
1828         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1829         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1830         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1831         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1832         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1833         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1834         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1835         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1836         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1837
1838         if (start_active_slot(slot)) {
1839                 run_active_slot(slot);
1840                 free(out_data);
1841                 free(if_header);
1842                 if (results.curl_result != CURLE_OK) {
1843                         fprintf(stderr,
1844                                 "PUT error: curl result=%d, HTTP code=%ld\n",
1845                                 results.curl_result, results.http_code);
1846                         /* We should attempt recovery? */
1847                         return 0;
1848                 }
1849         } else {
1850                 free(out_data);
1851                 free(if_header);
1852                 fprintf(stderr, "Unable to start PUT request\n");
1853                 return 0;
1854         }
1855
1856         return 1;
1857 }
1858
1859 static struct ref *local_refs, **local_tail;
1860 static struct ref *remote_refs, **remote_tail;
1861
1862 static int one_local_ref(const char *refname, const unsigned char *sha1)
1863 {
1864         struct ref *ref;
1865         int len = strlen(refname) + 1;
1866         ref = xcalloc(1, sizeof(*ref) + len);
1867         memcpy(ref->new_sha1, sha1, 20);
1868         memcpy(ref->name, refname, len);
1869         *local_tail = ref;
1870         local_tail = &ref->next;
1871         return 0;
1872 }
1873
1874 static void one_remote_ref(char *refname)
1875 {
1876         struct ref *ref;
1877         unsigned char remote_sha1[20];
1878         struct object *obj;
1879         int len = strlen(refname) + 1;
1880
1881         if (fetch_ref(refname, remote_sha1) != 0) {
1882                 fprintf(stderr,
1883                         "Unable to fetch ref %s from %s\n",
1884                         refname, remote->url);
1885                 return;
1886         }
1887
1888         /*
1889          * Fetch a copy of the object if it doesn't exist locally - it
1890          * may be required for updating server info later.
1891          */
1892         if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1893                 obj = lookup_unknown_object(remote_sha1);
1894                 if (obj) {
1895                         fprintf(stderr, "  fetch %s for %s\n",
1896                                 sha1_to_hex(remote_sha1), refname);
1897                         add_fetch_request(obj);
1898                 }
1899         }
1900
1901         ref = xcalloc(1, sizeof(*ref) + len);
1902         memcpy(ref->old_sha1, remote_sha1, 20);
1903         memcpy(ref->name, refname, len);
1904         *remote_tail = ref;
1905         remote_tail = &ref->next;
1906 }
1907
1908 static void get_local_heads(void)
1909 {
1910         local_tail = &local_refs;
1911         for_each_ref(one_local_ref);
1912 }
1913
1914 static void get_dav_remote_heads(void)
1915 {
1916         remote_tail = &remote_refs;
1917         remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1918 }
1919
1920 static int is_zero_sha1(const unsigned char *sha1)
1921 {
1922         int i;
1923
1924         for (i = 0; i < 20; i++) {
1925                 if (*sha1++)
1926                         return 0;
1927         }
1928         return 1;
1929 }
1930
1931 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1932 {
1933         while (list) {
1934                 struct commit_list *temp = list;
1935                 temp->item->object.flags &= ~mark;
1936                 list = temp->next;
1937                 free(temp);
1938         }
1939 }
1940
1941 static int ref_newer(const unsigned char *new_sha1,
1942                      const unsigned char *old_sha1)
1943 {
1944         struct object *o;
1945         struct commit *old, *new;
1946         struct commit_list *list, *used;
1947         int found = 0;
1948
1949         /* Both new and old must be commit-ish and new is descendant of
1950          * old.  Otherwise we require --force.
1951          */
1952         o = deref_tag(parse_object(old_sha1), NULL, 0);
1953         if (!o || o->type != commit_type)
1954                 return 0;
1955         old = (struct commit *) o;
1956
1957         o = deref_tag(parse_object(new_sha1), NULL, 0);
1958         if (!o || o->type != commit_type)
1959                 return 0;
1960         new = (struct commit *) o;
1961
1962         if (parse_commit(new) < 0)
1963                 return 0;
1964
1965         used = list = NULL;
1966         commit_list_insert(new, &list);
1967         while (list) {
1968                 new = pop_most_recent_commit(&list, TMP_MARK);
1969                 commit_list_insert(new, &used);
1970                 if (new == old) {
1971                         found = 1;
1972                         break;
1973                 }
1974         }
1975         unmark_and_free(list, TMP_MARK);
1976         unmark_and_free(used, TMP_MARK);
1977         return found;
1978 }
1979
1980 static void mark_edge_parents_uninteresting(struct commit *commit)
1981 {
1982         struct commit_list *parents;
1983
1984         for (parents = commit->parents; parents; parents = parents->next) {
1985                 struct commit *parent = parents->item;
1986                 if (!(parent->object.flags & UNINTERESTING))
1987                         continue;
1988                 mark_tree_uninteresting(parent->tree);
1989         }
1990 }
1991
1992 static void mark_edges_uninteresting(struct commit_list *list)
1993 {
1994         for ( ; list; list = list->next) {
1995                 struct commit *commit = list->item;
1996
1997                 if (commit->object.flags & UNINTERESTING) {
1998                         mark_tree_uninteresting(commit->tree);
1999                         continue;
2000                 }
2001                 mark_edge_parents_uninteresting(commit);
2002         }
2003 }
2004
2005 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2006 {
2007         struct buffer *buf = (struct buffer *)ls->userData;
2008         unsigned char remote_sha1[20];
2009         struct object *o;
2010         int len;
2011         char *ref_info;
2012
2013         if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2014                 fprintf(stderr,
2015                         "Unable to fetch ref %s from %s\n",
2016                         ls->dentry_name, remote->url);
2017                 aborted = 1;
2018                 return;
2019         }
2020
2021         o = parse_object(remote_sha1);
2022         if (!o) {
2023                 fprintf(stderr,
2024                         "Unable to parse object %s for remote ref %s\n",
2025                         sha1_to_hex(remote_sha1), ls->dentry_name);
2026                 aborted = 1;
2027                 return;
2028         }
2029
2030         len = strlen(ls->dentry_name) + 42;
2031         ref_info = xcalloc(len + 1, 1);
2032         sprintf(ref_info, "%s   %s\n",
2033                 sha1_to_hex(remote_sha1), ls->dentry_name);
2034         fwrite_buffer(ref_info, 1, len, buf);
2035         free(ref_info);
2036
2037         if (o->type == tag_type) {
2038                 o = deref_tag(o, ls->dentry_name, 0);
2039                 if (o) {
2040                         len = strlen(ls->dentry_name) + 45;
2041                         ref_info = xcalloc(len + 1, 1);
2042                         sprintf(ref_info, "%s   %s^{}\n",
2043                                 sha1_to_hex(o->sha1), ls->dentry_name);
2044                         fwrite_buffer(ref_info, 1, len, buf);
2045                         free(ref_info);
2046                 }
2047         }
2048 }
2049
2050 static void update_remote_info_refs(struct remote_lock *lock)
2051 {
2052         struct buffer buffer;
2053         struct active_request_slot *slot;
2054         struct slot_results results;
2055         char *if_header;
2056         struct curl_slist *dav_headers = NULL;
2057
2058         buffer.buffer = xcalloc(1, 4096);
2059         buffer.size = 4096;
2060         buffer.posn = 0;
2061         remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2062                   add_remote_info_ref, &buffer);
2063         if (!aborted) {
2064                 if_header = xmalloc(strlen(lock->token) + 25);
2065                 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2066                 dav_headers = curl_slist_append(dav_headers, if_header);
2067
2068                 slot = get_active_slot();
2069                 slot->results = &results;
2070                 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2071                 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2072                 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2073                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2074                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2075                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2076                 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2077                 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2078                 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2079
2080                 buffer.posn = 0;
2081
2082                 if (start_active_slot(slot)) {
2083                         run_active_slot(slot);
2084                         if (results.curl_result != CURLE_OK) {
2085                                 fprintf(stderr,
2086                                         "PUT error: curl result=%d, HTTP code=%ld\n",
2087                                         results.curl_result, results.http_code);
2088                         }
2089                 }
2090                 free(if_header);
2091         }
2092         free(buffer.buffer);
2093 }
2094
2095 static int remote_exists(const char *path)
2096 {
2097         char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2098         struct active_request_slot *slot;
2099         struct slot_results results;
2100
2101         sprintf(url, "%s%s", remote->url, path);
2102
2103         slot = get_active_slot();
2104         slot->results = &results;
2105         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2106         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2107
2108         if (start_active_slot(slot)) {
2109                 run_active_slot(slot);
2110                 if (results.http_code == 404)
2111                         return 0;
2112                 else if (results.curl_result == CURLE_OK)
2113                         return 1;
2114                 else
2115                         fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2116         } else {
2117                 fprintf(stderr, "Unable to start HEAD request\n");
2118         }
2119
2120         return -1;
2121 }
2122
2123 static void fetch_symref(char *path, char **symref, unsigned char *sha1)
2124 {
2125         char *url;
2126         struct buffer buffer;
2127         struct active_request_slot *slot;
2128         struct slot_results results;
2129
2130         url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2131         sprintf(url, "%s%s", remote->url, path);
2132
2133         buffer.size = 4096;
2134         buffer.posn = 0;
2135         buffer.buffer = xmalloc(buffer.size);
2136
2137         slot = get_active_slot();
2138         slot->results = &results;
2139         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2140         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2141         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2142         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2143         if (start_active_slot(slot)) {
2144                 run_active_slot(slot);
2145                 if (results.curl_result != CURLE_OK) {
2146                         die("Couldn't get %s for remote symref\n%s",
2147                             url, curl_errorstr);
2148                 }
2149         } else {
2150                 die("Unable to start remote symref request");
2151         }
2152         free(url);
2153
2154         if (*symref != NULL)
2155                 free(*symref);
2156         *symref = NULL;
2157         memset(sha1, 0, 20);
2158
2159         if (buffer.posn == 0)
2160                 return;
2161
2162         /* If it's a symref, set the refname; otherwise try for a sha1 */
2163         if (!strncmp((char *)buffer.buffer, "ref: ", 5)) {
2164                 *symref = xmalloc(buffer.posn - 5);
2165                 safe_strncpy(*symref, (char *)buffer.buffer + 5, buffer.posn - 5);
2166         } else {
2167                 get_sha1_hex(buffer.buffer, sha1);
2168         }
2169
2170         free(buffer.buffer);
2171 }
2172
2173 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2174 {
2175         int pipe_fd[2];
2176         pid_t merge_base_pid;
2177         char line[PATH_MAX + 20];
2178         unsigned char merge_sha1[20];
2179         int verified = 0;
2180
2181         if (pipe(pipe_fd) < 0)
2182                 die("Verify merge base: pipe failed");
2183
2184         merge_base_pid = fork();
2185         if (!merge_base_pid) {
2186                 static const char *args[] = {
2187                         "merge-base",
2188                         "-a",
2189                         NULL,
2190                         NULL,
2191                         NULL
2192                 };
2193                 args[2] = strdup(sha1_to_hex(head_sha1));
2194                 args[3] = sha1_to_hex(branch_sha1);
2195
2196                 dup2(pipe_fd[1], 1);
2197                 close(pipe_fd[0]);
2198                 close(pipe_fd[1]);
2199                 execv_git_cmd(args);
2200                 die("merge-base setup failed");
2201         }
2202         if (merge_base_pid < 0)
2203                 die("merge-base fork failed");
2204
2205         dup2(pipe_fd[0], 0);
2206         close(pipe_fd[0]);
2207         close(pipe_fd[1]);
2208         while (fgets(line, sizeof(line), stdin) != NULL) {
2209                 if (get_sha1_hex(line, merge_sha1))
2210                         die("expected sha1, got garbage:\n %s", line);
2211                 if (!memcmp(branch_sha1, merge_sha1, 20)) {
2212                         verified = 1;
2213                         break;
2214                 }
2215         }
2216
2217         return verified;
2218 }
2219
2220 static int delete_remote_branch(char *pattern, int force)
2221 {
2222         struct ref *refs = remote_refs;
2223         struct ref *remote_ref = NULL;
2224         unsigned char head_sha1[20];
2225         char *symref = NULL;
2226         int match;
2227         int patlen = strlen(pattern);
2228         int i;
2229         struct active_request_slot *slot;
2230         struct slot_results results;
2231         char *url;
2232
2233         /* Find the remote branch(es) matching the specified branch name */
2234         for (match = 0; refs; refs = refs->next) {
2235                 char *name = refs->name;
2236                 int namelen = strlen(name);
2237                 if (namelen < patlen ||
2238                     memcmp(name + namelen - patlen, pattern, patlen))
2239                         continue;
2240                 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2241                         continue;
2242                 match++;
2243                 remote_ref = refs;
2244         }
2245         if (match == 0)
2246                 return error("No remote branch matches %s", pattern);
2247         if (match != 1)
2248                 return error("More than one remote branch matches %s",
2249                              pattern);
2250
2251         /*
2252          * Remote HEAD must be a symref (not exactly foolproof; a remote
2253          * symlink to a symref will look like a symref)
2254          */
2255         fetch_symref("HEAD", &symref, head_sha1);
2256         if (!symref)
2257                 return error("Remote HEAD is not a symref");
2258
2259         /* Remote branch must not be the remote HEAD */
2260         for (i=0; symref && i<MAXDEPTH; i++) {
2261                 if (!strcmp(remote_ref->name, symref))
2262                         return error("Remote branch %s is the current HEAD",
2263                                      remote_ref->name);
2264                 fetch_symref(symref, &symref, head_sha1);
2265         }
2266
2267         /* Run extra sanity checks if delete is not forced */
2268         if (!force) {
2269                 /* Remote HEAD must resolve to a known object */
2270                 if (symref)
2271                         return error("Remote HEAD symrefs too deep");
2272                 if (is_zero_sha1(head_sha1))
2273                         return error("Unable to resolve remote HEAD");
2274                 if (!has_sha1_file(head_sha1))
2275                         return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2276
2277                 /* Remote branch must resolve to a known object */
2278                 if (is_zero_sha1(remote_ref->old_sha1))
2279                         return error("Unable to resolve remote branch %s",
2280                                      remote_ref->name);
2281                 if (!has_sha1_file(remote_ref->old_sha1))
2282                         return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, sha1_to_hex(remote_ref->old_sha1));
2283
2284                 /* Remote branch must be an ancestor of remote HEAD */
2285                 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2286                         return error("The branch '%s' is not a strict subset of your current HEAD.\nIf you are sure you want to delete it, run:\n\t'git http-push -D %s %s'", remote_ref->name, remote->url, pattern);
2287                 }
2288         }
2289
2290         /* Send delete request */
2291         fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2292         url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2293         sprintf(url, "%s%s", remote->url, remote_ref->name);
2294         slot = get_active_slot();
2295         slot->results = &results;
2296         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2297         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2298         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2299         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2300         if (start_active_slot(slot)) {
2301                 run_active_slot(slot);
2302                 free(url);
2303                 if (results.curl_result != CURLE_OK)
2304                         return error("DELETE request failed (%d/%ld)\n",
2305                                      results.curl_result, results.http_code);
2306         } else {
2307                 free(url);
2308                 return error("Unable to start DELETE request");
2309         }
2310
2311         return 0;
2312 }
2313
2314 int main(int argc, char **argv)
2315 {
2316         struct transfer_request *request;
2317         struct transfer_request *next_request;
2318         int nr_refspec = 0;
2319         char **refspec = NULL;
2320         struct remote_lock *ref_lock = NULL;
2321         struct remote_lock *info_ref_lock = NULL;
2322         struct rev_info revs;
2323         int delete_branch = 0;
2324         int force_delete = 0;
2325         int objects_to_send;
2326         int rc = 0;
2327         int i;
2328         int new_refs;
2329         struct ref *ref;
2330
2331         setup_git_directory();
2332         setup_ident();
2333
2334         remote = xcalloc(sizeof(*remote), 1);
2335
2336         argv++;
2337         for (i = 1; i < argc; i++, argv++) {
2338                 char *arg = *argv;
2339
2340                 if (*arg == '-') {
2341                         if (!strcmp(arg, "--all")) {
2342                                 push_all = 1;
2343                                 continue;
2344                         }
2345                         if (!strcmp(arg, "--force")) {
2346                                 force_all = 1;
2347                                 continue;
2348                         }
2349                         if (!strcmp(arg, "--verbose")) {
2350                                 push_verbosely = 1;
2351                                 continue;
2352                         }
2353                         if (!strcmp(arg, "-d")) {
2354                                 delete_branch = 1;
2355                                 continue;
2356                         }
2357                         if (!strcmp(arg, "-D")) {
2358                                 delete_branch = 1;
2359                                 force_delete = 1;
2360                                 continue;
2361                         }
2362                 }
2363                 if (!remote->url) {
2364                         char *path = strstr(arg, "//");
2365                         remote->url = arg;
2366                         if (path) {
2367                                 path = strchr(path+2, '/');
2368                                 if (path)
2369                                         remote->path_len = strlen(path);
2370                         }
2371                         continue;
2372                 }
2373                 refspec = argv;
2374                 nr_refspec = argc - i;
2375                 break;
2376         }
2377
2378         if (!remote->url)
2379                 usage(http_push_usage);
2380
2381         if (delete_branch && nr_refspec != 1)
2382                 die("You must specify only one branch name when deleting a remote branch");
2383
2384         memset(remote_dir_exists, -1, 256);
2385
2386         http_init();
2387
2388         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2389         default_headers = curl_slist_append(default_headers, "Range:");
2390         default_headers = curl_slist_append(default_headers, "Destination:");
2391         default_headers = curl_slist_append(default_headers, "If:");
2392         default_headers = curl_slist_append(default_headers,
2393                                             "Pragma: no-cache");
2394
2395         /* Verify DAV compliance/lock support */
2396         if (!locking_available()) {
2397                 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2398                 rc = 1;
2399                 goto cleanup;
2400         }
2401
2402         /* Check whether the remote has server info files */
2403         remote->can_update_info_refs = 0;
2404         remote->has_info_refs = remote_exists("info/refs");
2405         remote->has_info_packs = remote_exists("objects/info/packs");
2406         if (remote->has_info_refs) {
2407                 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2408                 if (info_ref_lock)
2409                         remote->can_update_info_refs = 1;
2410         }
2411         if (remote->has_info_packs)
2412                 fetch_indices();
2413
2414         /* Get a list of all local and remote heads to validate refspecs */
2415         get_local_heads();
2416         fprintf(stderr, "Fetching remote heads...\n");
2417         get_dav_remote_heads();
2418
2419         /* Remove a remote branch if -d or -D was specified */
2420         if (delete_branch) {
2421                 if (delete_remote_branch(refspec[0], force_delete) == -1)
2422                         fprintf(stderr, "Unable to delete remote branch %s\n",
2423                                 refspec[0]);
2424                 goto cleanup;
2425         }
2426
2427         /* match them up */
2428         if (!remote_tail)
2429                 remote_tail = &remote_refs;
2430         if (match_refs(local_refs, remote_refs, &remote_tail,
2431                        nr_refspec, refspec, push_all))
2432                 return -1;
2433         if (!remote_refs) {
2434                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2435                 return 0;
2436         }
2437
2438         new_refs = 0;
2439         for (ref = remote_refs; ref; ref = ref->next) {
2440                 char old_hex[60], *new_hex;
2441                 const char *commit_argv[4];
2442                 int commit_argc;
2443                 char *new_sha1_hex, *old_sha1_hex;
2444
2445                 if (!ref->peer_ref)
2446                         continue;
2447                 if (!memcmp(ref->old_sha1, ref->peer_ref->new_sha1, 20)) {
2448                         if (push_verbosely || 1)
2449                                 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2450                         continue;
2451                 }
2452
2453                 if (!force_all &&
2454                     !is_zero_sha1(ref->old_sha1) &&
2455                     !ref->force) {
2456                         if (!has_sha1_file(ref->old_sha1) ||
2457                             !ref_newer(ref->peer_ref->new_sha1,
2458                                        ref->old_sha1)) {
2459                                 /* We do not have the remote ref, or
2460                                  * we know that the remote ref is not
2461                                  * an ancestor of what we are trying to
2462                                  * push.  Either way this can be losing
2463                                  * commits at the remote end and likely
2464                                  * we were not up to date to begin with.
2465                                  */
2466                                 error("remote '%s' is not a strict "
2467                                       "subset of local ref '%s'. "
2468                                       "maybe you are not up-to-date and "
2469                                       "need to pull first?",
2470                                       ref->name,
2471                                       ref->peer_ref->name);
2472                                 rc = -2;
2473                                 continue;
2474                         }
2475                 }
2476                 memcpy(ref->new_sha1, ref->peer_ref->new_sha1, 20);
2477                 if (is_zero_sha1(ref->new_sha1)) {
2478                         error("cannot happen anymore");
2479                         rc = -3;
2480                         continue;
2481                 }
2482                 new_refs++;
2483                 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2484                 new_hex = sha1_to_hex(ref->new_sha1);
2485
2486                 fprintf(stderr, "updating '%s'", ref->name);
2487                 if (strcmp(ref->name, ref->peer_ref->name))
2488                         fprintf(stderr, " using '%s'", ref->peer_ref->name);
2489                 fprintf(stderr, "\n  from %s\n  to   %s\n", old_hex, new_hex);
2490
2491
2492                 /* Lock remote branch ref */
2493                 ref_lock = lock_remote(ref->name, LOCK_TIME);
2494                 if (ref_lock == NULL) {
2495                         fprintf(stderr, "Unable to lock remote branch %s\n",
2496                                 ref->name);
2497                         rc = 1;
2498                         continue;
2499                 }
2500
2501                 /* Set up revision info for this refspec */
2502                 commit_argc = 3;
2503                 new_sha1_hex = strdup(sha1_to_hex(ref->new_sha1));
2504                 old_sha1_hex = NULL;
2505                 commit_argv[1] = "--objects";
2506                 commit_argv[2] = new_sha1_hex;
2507                 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2508                         old_sha1_hex = xmalloc(42);
2509                         sprintf(old_sha1_hex, "^%s",
2510                                 sha1_to_hex(ref->old_sha1));
2511                         commit_argv[3] = old_sha1_hex;
2512                         commit_argc++;
2513                 }
2514                 init_revisions(&revs);
2515                 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2516                 free(new_sha1_hex);
2517                 if (old_sha1_hex) {
2518                         free(old_sha1_hex);
2519                         commit_argv[1] = NULL;
2520                 }
2521
2522                 /* Generate a list of objects that need to be pushed */
2523                 pushing = 0;
2524                 prepare_revision_walk(&revs);
2525                 mark_edges_uninteresting(revs.commits);
2526                 objects_to_send = get_delta(&revs, ref_lock);
2527                 finish_all_active_slots();
2528
2529                 /* Push missing objects to remote, this would be a
2530                    convenient time to pack them first if appropriate. */
2531                 pushing = 1;
2532                 if (objects_to_send)
2533                         fprintf(stderr, "    sending %d objects\n",
2534                                 objects_to_send);
2535 #ifdef USE_CURL_MULTI
2536                 fill_active_slots();
2537 #endif
2538                 finish_all_active_slots();
2539
2540                 /* Update the remote branch if all went well */
2541                 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2542                         rc = 1;
2543                         goto unlock;
2544                 }
2545
2546         unlock:
2547                 if (!rc)
2548                         fprintf(stderr, "    done\n");
2549                 unlock_remote(ref_lock);
2550                 check_locks();
2551         }
2552
2553         /* Update remote server info if appropriate */
2554         if (remote->has_info_refs && new_refs) {
2555                 if (info_ref_lock && remote->can_update_info_refs) {
2556                         fprintf(stderr, "Updating remote server info\n");
2557                         update_remote_info_refs(info_ref_lock);
2558                 } else {
2559                         fprintf(stderr, "Unable to update server info\n");
2560                 }
2561         }
2562         if (info_ref_lock)
2563                 unlock_remote(info_ref_lock);
2564
2565  cleanup:
2566         free(remote);
2567
2568         curl_slist_free_all(no_pragma_header);
2569         curl_slist_free_all(default_headers);
2570
2571         http_cleanup();
2572
2573         request = request_queue_head;
2574         while (request != NULL) {
2575                 next_request = request->next;
2576                 release_request(request);
2577                 request = next_request;
2578         }
2579
2580         return rc;
2581 }