Andrew's git - gitweb.git/blob

4086aa733b7d7a434af9fb2d9e8969663f0f77f2
   1#include "cache.h"
   2#include "config.h"
   3#include "remote.h"
   4#include "connect.h"
   5#include "strbuf.h"
   6#include "walker.h"
   7#include "http.h"
   8#include "exec_cmd.h"
   9#include "run-command.h"
  10#include "pkt-line.h"
  11#include "string-list.h"
  12#include "sideband.h"
  13#include "argv-array.h"
  14#include "credential.h"
  15#include "sha1-array.h"
  16#include "send-pack.h"
  17#include "protocol.h"
  18
  19static struct remote *remote;
  20/* always ends with a trailing slash */
  21static struct strbuf url = STRBUF_INIT;
  22
  23struct options {
  24        int verbosity;
  25        unsigned long depth;
  26        char *deepen_since;
  27        struct string_list deepen_not;
  28        struct string_list push_options;
  29        unsigned progress : 1,
  30                check_self_contained_and_connected : 1,
  31                cloning : 1,
  32                update_shallow : 1,
  33                followtags : 1,
  34                dry_run : 1,
  35                thin : 1,
  36                /* One of the SEND_PACK_PUSH_CERT_* constants. */
  37                push_cert : 2,
  38                deepen_relative : 1;
  39};
  40static struct options options;
  41static struct string_list cas_options = STRING_LIST_INIT_DUP;
  42
  43static int set_option(const char *name, const char *value)
  44{
  45        if (!strcmp(name, "verbosity")) {
  46                char *end;
  47                int v = strtol(value, &end, 10);
  48                if (value == end || *end)
  49                        return -1;
  50                options.verbosity = v;
  51                return 0;
  52        }
  53        else if (!strcmp(name, "progress")) {
  54                if (!strcmp(value, "true"))
  55                        options.progress = 1;
  56                else if (!strcmp(value, "false"))
  57                        options.progress = 0;
  58                else
  59                        return -1;
  60                return 0;
  61        }
  62        else if (!strcmp(name, "depth")) {
  63                char *end;
  64                unsigned long v = strtoul(value, &end, 10);
  65                if (value == end || *end)
  66                        return -1;
  67                options.depth = v;
  68                return 0;
  69        }
  70        else if (!strcmp(name, "deepen-since")) {
  71                options.deepen_since = xstrdup(value);
  72                return 0;
  73        }
  74        else if (!strcmp(name, "deepen-not")) {
  75                string_list_append(&options.deepen_not, value);
  76                return 0;
  77        }
  78        else if (!strcmp(name, "deepen-relative")) {
  79                if (!strcmp(value, "true"))
  80                        options.deepen_relative = 1;
  81                else if (!strcmp(value, "false"))
  82                        options.deepen_relative = 0;
  83                else
  84                        return -1;
  85                return 0;
  86        }
  87        else if (!strcmp(name, "followtags")) {
  88                if (!strcmp(value, "true"))
  89                        options.followtags = 1;
  90                else if (!strcmp(value, "false"))
  91                        options.followtags = 0;
  92                else
  93                        return -1;
  94                return 0;
  95        }
  96        else if (!strcmp(name, "dry-run")) {
  97                if (!strcmp(value, "true"))
  98                        options.dry_run = 1;
  99                else if (!strcmp(value, "false"))
 100                        options.dry_run = 0;
 101                else
 102                        return -1;
 103                return 0;
 104        }
 105        else if (!strcmp(name, "check-connectivity")) {
 106                if (!strcmp(value, "true"))
 107                        options.check_self_contained_and_connected = 1;
 108                else if (!strcmp(value, "false"))
 109                        options.check_self_contained_and_connected = 0;
 110                else
 111                        return -1;
 112                return 0;
 113        }
 114        else if (!strcmp(name, "cas")) {
 115                struct strbuf val = STRBUF_INIT;
 116                strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
 117                string_list_append(&cas_options, val.buf);
 118                strbuf_release(&val);
 119                return 0;
 120        } else if (!strcmp(name, "cloning")) {
 121                if (!strcmp(value, "true"))
 122                        options.cloning = 1;
 123                else if (!strcmp(value, "false"))
 124                        options.cloning = 0;
 125                else
 126                        return -1;
 127                return 0;
 128        } else if (!strcmp(name, "update-shallow")) {
 129                if (!strcmp(value, "true"))
 130                        options.update_shallow = 1;
 131                else if (!strcmp(value, "false"))
 132                        options.update_shallow = 0;
 133                else
 134                        return -1;
 135                return 0;
 136        } else if (!strcmp(name, "pushcert")) {
 137                if (!strcmp(value, "true"))
 138                        options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 139                else if (!strcmp(value, "false"))
 140                        options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 141                else if (!strcmp(value, "if-asked"))
 142                        options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 143                else
 144                        return -1;
 145                return 0;
 146        } else if (!strcmp(name, "push-option")) {
 147                string_list_append(&options.push_options, value);
 148                return 0;
 149
 150#if LIBCURL_VERSION_NUM >= 0x070a08
 151        } else if (!strcmp(name, "family")) {
 152                if (!strcmp(value, "ipv4"))
 153                        git_curl_ipresolve = CURL_IPRESOLVE_V4;
 154                else if (!strcmp(value, "ipv6"))
 155                        git_curl_ipresolve = CURL_IPRESOLVE_V6;
 156                else if (!strcmp(value, "all"))
 157                        git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
 158                else
 159                        return -1;
 160                return 0;
 161#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
 162        } else {
 163                return 1 /* unsupported */;
 164        }
 165}
 166
 167struct discovery {
 168        char *service;
 169        char *buf_alloc;
 170        char *buf;
 171        size_t len;
 172        struct ref *refs;
 173        struct oid_array shallow;
 174        unsigned proto_git : 1;
 175};
 176static struct discovery *last_discovery;
 177
 178static struct ref *parse_git_refs(struct discovery *heads, int for_push)
 179{
 180        struct ref *list = NULL;
 181        struct packet_reader reader;
 182
 183        packet_reader_init(&reader, -1, heads->buf, heads->len,
 184                           PACKET_READ_CHOMP_NEWLINE |
 185                           PACKET_READ_GENTLE_ON_EOF);
 186
 187        switch (discover_version(&reader)) {
 188        case protocol_v2:
 189                die("support for protocol v2 not implemented yet");
 190                break;
 191        case protocol_v1:
 192        case protocol_v0:
 193                get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
 194                                 NULL, &heads->shallow);
 195                break;
 196        case protocol_unknown_version:
 197                BUG("unknown protocol version");
 198        }
 199
 200        return list;
 201}
 202
 203static struct ref *parse_info_refs(struct discovery *heads)
 204{
 205        char *data, *start, *mid;
 206        char *ref_name;
 207        int i = 0;
 208
 209        struct ref *refs = NULL;
 210        struct ref *ref = NULL;
 211        struct ref *last_ref = NULL;
 212
 213        data = heads->buf;
 214        start = NULL;
 215        mid = data;
 216        while (i < heads->len) {
 217                if (!start) {
 218                        start = &data[i];
 219                }
 220                if (data[i] == '\t')
 221                        mid = &data[i];
 222                if (data[i] == '\n') {
 223                        if (mid - start != 40)
 224                                die("%sinfo/refs not valid: is this a git repository?",
 225                                    url.buf);
 226                        data[i] = 0;
 227                        ref_name = mid + 1;
 228                        ref = alloc_ref(ref_name);
 229                        get_oid_hex(start, &ref->old_oid);
 230                        if (!refs)
 231                                refs = ref;
 232                        if (last_ref)
 233                                last_ref->next = ref;
 234                        last_ref = ref;
 235                        start = NULL;
 236                }
 237                i++;
 238        }
 239
 240        ref = alloc_ref("HEAD");
 241        if (!http_fetch_ref(url.buf, ref) &&
 242            !resolve_remote_symref(ref, refs)) {
 243                ref->next = refs;
 244                refs = ref;
 245        } else {
 246                free(ref);
 247        }
 248
 249        return refs;
 250}
 251
 252static void free_discovery(struct discovery *d)
 253{
 254        if (d) {
 255                if (d == last_discovery)
 256                        last_discovery = NULL;
 257                free(d->shallow.oid);
 258                free(d->buf_alloc);
 259                free_refs(d->refs);
 260                free(d->service);
 261                free(d);
 262        }
 263}
 264
 265static int show_http_message(struct strbuf *type, struct strbuf *charset,
 266                             struct strbuf *msg)
 267{
 268        const char *p, *eol;
 269
 270        /*
 271         * We only show text/plain parts, as other types are likely
 272         * to be ugly to look at on the user's terminal.
 273         */
 274        if (strcmp(type->buf, "text/plain"))
 275                return -1;
 276        if (charset->len)
 277                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 278
 279        strbuf_trim(msg);
 280        if (!msg->len)
 281                return -1;
 282
 283        p = msg->buf;
 284        do {
 285                eol = strchrnul(p, '\n');
 286                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 287                p = eol + 1;
 288        } while(*eol);
 289        return 0;
 290}
 291
 292static struct discovery *discover_refs(const char *service, int for_push)
 293{
 294        struct strbuf exp = STRBUF_INIT;
 295        struct strbuf type = STRBUF_INIT;
 296        struct strbuf charset = STRBUF_INIT;
 297        struct strbuf buffer = STRBUF_INIT;
 298        struct strbuf refs_url = STRBUF_INIT;
 299        struct strbuf effective_url = STRBUF_INIT;
 300        struct discovery *last = last_discovery;
 301        int http_ret, maybe_smart = 0;
 302        struct http_get_options http_options;
 303
 304        if (last && !strcmp(service, last->service))
 305                return last;
 306        free_discovery(last);
 307
 308        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 309        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 310             git_env_bool("GIT_SMART_HTTP", 1)) {
 311                maybe_smart = 1;
 312                if (!strchr(url.buf, '?'))
 313                        strbuf_addch(&refs_url, '?');
 314                else
 315                        strbuf_addch(&refs_url, '&');
 316                strbuf_addf(&refs_url, "service=%s", service);
 317        }
 318
 319        memset(&http_options, 0, sizeof(http_options));
 320        http_options.content_type = &type;
 321        http_options.charset = &charset;
 322        http_options.effective_url = &effective_url;
 323        http_options.base_url = &url;
 324        http_options.initial_request = 1;
 325        http_options.no_cache = 1;
 326        http_options.keep_error = 1;
 327
 328        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 329        switch (http_ret) {
 330        case HTTP_OK:
 331                break;
 332        case HTTP_MISSING_TARGET:
 333                show_http_message(&type, &charset, &buffer);
 334                die("repository '%s' not found", url.buf);
 335        case HTTP_NOAUTH:
 336                show_http_message(&type, &charset, &buffer);
 337                die("Authentication failed for '%s'", url.buf);
 338        default:
 339                show_http_message(&type, &charset, &buffer);
 340                die("unable to access '%s': %s", url.buf, curl_errorstr);
 341        }
 342
 343        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 344                warning(_("redirecting to %s"), url.buf);
 345
 346        last= xcalloc(1, sizeof(*last_discovery));
 347        last->service = xstrdup(service);
 348        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 349        last->buf = last->buf_alloc;
 350
 351        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 352        if (maybe_smart &&
 353            (5 <= last->len && last->buf[4] == '#') &&
 354            !strbuf_cmp(&exp, &type)) {
 355                char *line;
 356
 357                /*
 358                 * smart HTTP response; validate that the service
 359                 * pkt-line matches our request.
 360                 */
 361                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 362
 363                strbuf_reset(&exp);
 364                strbuf_addf(&exp, "# service=%s", service);
 365                if (strcmp(line, exp.buf))
 366                        die("invalid server response; got '%s'", line);
 367                strbuf_release(&exp);
 368
 369                /* The header can include additional metadata lines, up
 370                 * until a packet flush marker.  Ignore these now, but
 371                 * in the future we might start to scan them.
 372                 */
 373                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 374                        ;
 375
 376                last->proto_git = 1;
 377        }
 378
 379        if (last->proto_git)
 380                last->refs = parse_git_refs(last, for_push);
 381        else
 382                last->refs = parse_info_refs(last);
 383
 384        strbuf_release(&refs_url);
 385        strbuf_release(&exp);
 386        strbuf_release(&type);
 387        strbuf_release(&charset);
 388        strbuf_release(&effective_url);
 389        strbuf_release(&buffer);
 390        last_discovery = last;
 391        return last;
 392}
 393
 394static struct ref *get_refs(int for_push)
 395{
 396        struct discovery *heads;
 397
 398        if (for_push)
 399                heads = discover_refs("git-receive-pack", for_push);
 400        else
 401                heads = discover_refs("git-upload-pack", for_push);
 402
 403        return heads->refs;
 404}
 405
 406static void output_refs(struct ref *refs)
 407{
 408        struct ref *posn;
 409        for (posn = refs; posn; posn = posn->next) {
 410                if (posn->symref)
 411                        printf("@%s %s\n", posn->symref, posn->name);
 412                else
 413                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 414        }
 415        printf("\n");
 416        fflush(stdout);
 417}
 418
 419struct rpc_state {
 420        const char *service_name;
 421        const char **argv;
 422        struct strbuf *stdin_preamble;
 423        char *service_url;
 424        char *hdr_content_type;
 425        char *hdr_accept;
 426        char *buf;
 427        size_t alloc;
 428        size_t len;
 429        size_t pos;
 430        int in;
 431        int out;
 432        int any_written;
 433        struct strbuf result;
 434        unsigned gzip_request : 1;
 435        unsigned initial_buffer : 1;
 436};
 437
 438static size_t rpc_out(void *ptr, size_t eltsize,
 439                size_t nmemb, void *buffer_)
 440{
 441        size_t max = eltsize * nmemb;
 442        struct rpc_state *rpc = buffer_;
 443        size_t avail = rpc->len - rpc->pos;
 444
 445        if (!avail) {
 446                rpc->initial_buffer = 0;
 447                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 448                if (!avail)
 449                        return 0;
 450                rpc->pos = 0;
 451                rpc->len = avail;
 452        }
 453
 454        if (max < avail)
 455                avail = max;
 456        memcpy(ptr, rpc->buf + rpc->pos, avail);
 457        rpc->pos += avail;
 458        return avail;
 459}
 460
 461#ifndef NO_CURL_IOCTL
 462static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 463{
 464        struct rpc_state *rpc = clientp;
 465
 466        switch (cmd) {
 467        case CURLIOCMD_NOP:
 468                return CURLIOE_OK;
 469
 470        case CURLIOCMD_RESTARTREAD:
 471                if (rpc->initial_buffer) {
 472                        rpc->pos = 0;
 473                        return CURLIOE_OK;
 474                }
 475                error("unable to rewind rpc post data - try increasing http.postBuffer");
 476                return CURLIOE_FAILRESTART;
 477
 478        default:
 479                return CURLIOE_UNKNOWNCMD;
 480        }
 481}
 482#endif
 483
 484static size_t rpc_in(char *ptr, size_t eltsize,
 485                size_t nmemb, void *buffer_)
 486{
 487        size_t size = eltsize * nmemb;
 488        struct rpc_state *rpc = buffer_;
 489        if (size)
 490                rpc->any_written = 1;
 491        write_or_die(rpc->in, ptr, size);
 492        return size;
 493}
 494
 495static int run_slot(struct active_request_slot *slot,
 496                    struct slot_results *results)
 497{
 498        int err;
 499        struct slot_results results_buf;
 500
 501        if (!results)
 502                results = &results_buf;
 503
 504        err = run_one_slot(slot, results);
 505
 506        if (err != HTTP_OK && err != HTTP_REAUTH) {
 507                struct strbuf msg = STRBUF_INIT;
 508                if (results->http_code && results->http_code != 200)
 509                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 510                if (results->curl_result != CURLE_OK) {
 511                        if (msg.len)
 512                                strbuf_addch(&msg, ' ');
 513                        strbuf_addf(&msg, "curl %d", results->curl_result);
 514                        if (curl_errorstr[0]) {
 515                                strbuf_addch(&msg, ' ');
 516                                strbuf_addstr(&msg, curl_errorstr);
 517                        }
 518                }
 519                error("RPC failed; %s", msg.buf);
 520                strbuf_release(&msg);
 521        }
 522
 523        return err;
 524}
 525
 526static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 527{
 528        struct active_request_slot *slot;
 529        struct curl_slist *headers = http_copy_default_headers();
 530        struct strbuf buf = STRBUF_INIT;
 531        int err;
 532
 533        slot = get_active_slot();
 534
 535        headers = curl_slist_append(headers, rpc->hdr_content_type);
 536        headers = curl_slist_append(headers, rpc->hdr_accept);
 537
 538        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 539        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 540        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 541        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 542        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 543        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 544        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 545        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 546        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 547
 548        err = run_slot(slot, results);
 549
 550        curl_slist_free_all(headers);
 551        strbuf_release(&buf);
 552        return err;
 553}
 554
 555static curl_off_t xcurl_off_t(ssize_t len) {
 556        if (len > maximum_signed_value_of_type(curl_off_t))
 557                die("cannot handle pushes this big");
 558        return (curl_off_t) len;
 559}
 560
 561static int post_rpc(struct rpc_state *rpc)
 562{
 563        struct active_request_slot *slot;
 564        struct curl_slist *headers = http_copy_default_headers();
 565        int use_gzip = rpc->gzip_request;
 566        char *gzip_body = NULL;
 567        size_t gzip_size = 0;
 568        int err, large_request = 0;
 569        int needs_100_continue = 0;
 570
 571        /* Try to load the entire request, if we can fit it into the
 572         * allocated buffer space we can use HTTP/1.0 and avoid the
 573         * chunked encoding mess.
 574         */
 575        while (1) {
 576                size_t left = rpc->alloc - rpc->len;
 577                char *buf = rpc->buf + rpc->len;
 578                int n;
 579
 580                if (left < LARGE_PACKET_MAX) {
 581                        large_request = 1;
 582                        use_gzip = 0;
 583                        break;
 584                }
 585
 586                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 587                if (!n)
 588                        break;
 589                rpc->len += n;
 590        }
 591
 592        if (large_request) {
 593                struct slot_results results;
 594
 595                do {
 596                        err = probe_rpc(rpc, &results);
 597                        if (err == HTTP_REAUTH)
 598                                credential_fill(&http_auth);
 599                } while (err == HTTP_REAUTH);
 600                if (err != HTTP_OK)
 601                        return -1;
 602
 603                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 604                        needs_100_continue = 1;
 605        }
 606
 607        headers = curl_slist_append(headers, rpc->hdr_content_type);
 608        headers = curl_slist_append(headers, rpc->hdr_accept);
 609        headers = curl_slist_append(headers, needs_100_continue ?
 610                "Expect: 100-continue" : "Expect:");
 611
 612retry:
 613        slot = get_active_slot();
 614
 615        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 616        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 617        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 618        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 619
 620        if (large_request) {
 621                /* The request body is large and the size cannot be predicted.
 622                 * We must use chunked encoding to send it.
 623                 */
 624                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 625                rpc->initial_buffer = 1;
 626                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 627                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 628#ifndef NO_CURL_IOCTL
 629                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 630                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 631#endif
 632                if (options.verbosity > 1) {
 633                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 634                        fflush(stderr);
 635                }
 636
 637        } else if (gzip_body) {
 638                /*
 639                 * If we are looping to retry authentication, then the previous
 640                 * run will have set up the headers and gzip buffer already,
 641                 * and we just need to send it.
 642                 */
 643                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 644                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 645
 646        } else if (use_gzip && 1024 < rpc->len) {
 647                /* The client backend isn't giving us compressed data so
 648                 * we can try to deflate it ourselves, this may save on.
 649                 * the transfer time.
 650                 */
 651                git_zstream stream;
 652                int ret;
 653
 654                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 655                gzip_size = git_deflate_bound(&stream, rpc->len);
 656                gzip_body = xmalloc(gzip_size);
 657
 658                stream.next_in = (unsigned char *)rpc->buf;
 659                stream.avail_in = rpc->len;
 660                stream.next_out = (unsigned char *)gzip_body;
 661                stream.avail_out = gzip_size;
 662
 663                ret = git_deflate(&stream, Z_FINISH);
 664                if (ret != Z_STREAM_END)
 665                        die("cannot deflate request; zlib deflate error %d", ret);
 666
 667                ret = git_deflate_end_gently(&stream);
 668                if (ret != Z_OK)
 669                        die("cannot deflate request; zlib end error %d", ret);
 670
 671                gzip_size = stream.total_out;
 672
 673                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 674                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 675                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 676
 677                if (options.verbosity > 1) {
 678                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 679                                rpc->service_name,
 680                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 681                        fflush(stderr);
 682                }
 683        } else {
 684                /* We know the complete request size in advance, use the
 685                 * more normal Content-Length approach.
 686                 */
 687                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 688                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 689                if (options.verbosity > 1) {
 690                        fprintf(stderr, "POST %s (%lu bytes)\n",
 691                                rpc->service_name, (unsigned long)rpc->len);
 692                        fflush(stderr);
 693                }
 694        }
 695
 696        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 697        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 698        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 699
 700
 701        rpc->any_written = 0;
 702        err = run_slot(slot, NULL);
 703        if (err == HTTP_REAUTH && !large_request) {
 704                credential_fill(&http_auth);
 705                goto retry;
 706        }
 707        if (err != HTTP_OK)
 708                err = -1;
 709
 710        if (!rpc->any_written)
 711                err = -1;
 712
 713        curl_slist_free_all(headers);
 714        free(gzip_body);
 715        return err;
 716}
 717
 718static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 719{
 720        const char *svc = rpc->service_name;
 721        struct strbuf buf = STRBUF_INIT;
 722        struct strbuf *preamble = rpc->stdin_preamble;
 723        struct child_process client = CHILD_PROCESS_INIT;
 724        int err = 0;
 725
 726        client.in = -1;
 727        client.out = -1;
 728        client.git_cmd = 1;
 729        client.argv = rpc->argv;
 730        if (start_command(&client))
 731                exit(1);
 732        if (preamble)
 733                write_or_die(client.in, preamble->buf, preamble->len);
 734        if (heads)
 735                write_or_die(client.in, heads->buf, heads->len);
 736
 737        rpc->alloc = http_post_buffer;
 738        rpc->buf = xmalloc(rpc->alloc);
 739        rpc->in = client.in;
 740        rpc->out = client.out;
 741        strbuf_init(&rpc->result, 0);
 742
 743        strbuf_addf(&buf, "%s%s", url.buf, svc);
 744        rpc->service_url = strbuf_detach(&buf, NULL);
 745
 746        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 747        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 748
 749        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 750        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 751
 752        while (!err) {
 753                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 754                if (!n)
 755                        break;
 756                rpc->pos = 0;
 757                rpc->len = n;
 758                err |= post_rpc(rpc);
 759        }
 760
 761        close(client.in);
 762        client.in = -1;
 763        if (!err) {
 764                strbuf_read(&rpc->result, client.out, 0);
 765        } else {
 766                char buf[4096];
 767                for (;;)
 768                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 769                                break;
 770        }
 771
 772        close(client.out);
 773        client.out = -1;
 774
 775        err |= finish_command(&client);
 776        free(rpc->service_url);
 777        free(rpc->hdr_content_type);
 778        free(rpc->hdr_accept);
 779        free(rpc->buf);
 780        strbuf_release(&buf);
 781        return err;
 782}
 783
 784static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 785{
 786        struct walker *walker;
 787        char **targets;
 788        int ret, i;
 789
 790        ALLOC_ARRAY(targets, nr_heads);
 791        if (options.depth || options.deepen_since)
 792                die("dumb http transport does not support shallow capabilities");
 793        for (i = 0; i < nr_heads; i++)
 794                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 795
 796        walker = get_http_walker(url.buf);
 797        walker->get_all = 1;
 798        walker->get_tree = 1;
 799        walker->get_history = 1;
 800        walker->get_verbosely = options.verbosity >= 3;
 801        walker->get_recover = 0;
 802        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 803        walker_free(walker);
 804
 805        for (i = 0; i < nr_heads; i++)
 806                free(targets[i]);
 807        free(targets);
 808
 809        return ret ? error("fetch failed.") : 0;
 810}
 811
 812static int fetch_git(struct discovery *heads,
 813        int nr_heads, struct ref **to_fetch)
 814{
 815        struct rpc_state rpc;
 816        struct strbuf preamble = STRBUF_INIT;
 817        int i, err;
 818        struct argv_array args = ARGV_ARRAY_INIT;
 819
 820        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 821                         "--stdin", "--lock-pack", NULL);
 822        if (options.followtags)
 823                argv_array_push(&args, "--include-tag");
 824        if (options.thin)
 825                argv_array_push(&args, "--thin");
 826        if (options.verbosity >= 3)
 827                argv_array_pushl(&args, "-v", "-v", NULL);
 828        if (options.check_self_contained_and_connected)
 829                argv_array_push(&args, "--check-self-contained-and-connected");
 830        if (options.cloning)
 831                argv_array_push(&args, "--cloning");
 832        if (options.update_shallow)
 833                argv_array_push(&args, "--update-shallow");
 834        if (!options.progress)
 835                argv_array_push(&args, "--no-progress");
 836        if (options.depth)
 837                argv_array_pushf(&args, "--depth=%lu", options.depth);
 838        if (options.deepen_since)
 839                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 840        for (i = 0; i < options.deepen_not.nr; i++)
 841                argv_array_pushf(&args, "--shallow-exclude=%s",
 842                                 options.deepen_not.items[i].string);
 843        if (options.deepen_relative && options.depth)
 844                argv_array_push(&args, "--deepen-relative");
 845        argv_array_push(&args, url.buf);
 846
 847        for (i = 0; i < nr_heads; i++) {
 848                struct ref *ref = to_fetch[i];
 849                if (!*ref->name)
 850                        die("cannot fetch by sha1 over smart http");
 851                packet_buf_write(&preamble, "%s %s\n",
 852                                 oid_to_hex(&ref->old_oid), ref->name);
 853        }
 854        packet_buf_flush(&preamble);
 855
 856        memset(&rpc, 0, sizeof(rpc));
 857        rpc.service_name = "git-upload-pack",
 858        rpc.argv = args.argv;
 859        rpc.stdin_preamble = &preamble;
 860        rpc.gzip_request = 1;
 861
 862        err = rpc_service(&rpc, heads);
 863        if (rpc.result.len)
 864                write_or_die(1, rpc.result.buf, rpc.result.len);
 865        strbuf_release(&rpc.result);
 866        strbuf_release(&preamble);
 867        argv_array_clear(&args);
 868        return err;
 869}
 870
 871static int fetch(int nr_heads, struct ref **to_fetch)
 872{
 873        struct discovery *d = discover_refs("git-upload-pack", 0);
 874        if (d->proto_git)
 875                return fetch_git(d, nr_heads, to_fetch);
 876        else
 877                return fetch_dumb(nr_heads, to_fetch);
 878}
 879
 880static void parse_fetch(struct strbuf *buf)
 881{
 882        struct ref **to_fetch = NULL;
 883        struct ref *list_head = NULL;
 884        struct ref **list = &list_head;
 885        int alloc_heads = 0, nr_heads = 0;
 886
 887        do {
 888                const char *p;
 889                if (skip_prefix(buf->buf, "fetch ", &p)) {
 890                        const char *name;
 891                        struct ref *ref;
 892                        struct object_id old_oid;
 893
 894                        if (get_oid_hex(p, &old_oid))
 895                                die("protocol error: expected sha/ref, got %s'", p);
 896                        if (p[GIT_SHA1_HEXSZ] == ' ')
 897                                name = p + GIT_SHA1_HEXSZ + 1;
 898                        else if (!p[GIT_SHA1_HEXSZ])
 899                                name = "";
 900                        else
 901                                die("protocol error: expected sha/ref, got %s'", p);
 902
 903                        ref = alloc_ref(name);
 904                        oidcpy(&ref->old_oid, &old_oid);
 905
 906                        *list = ref;
 907                        list = &ref->next;
 908
 909                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 910                        to_fetch[nr_heads++] = ref;
 911                }
 912                else
 913                        die("http transport does not support %s", buf->buf);
 914
 915                strbuf_reset(buf);
 916                if (strbuf_getline_lf(buf, stdin) == EOF)
 917                        return;
 918                if (!*buf->buf)
 919                        break;
 920        } while (1);
 921
 922        if (fetch(nr_heads, to_fetch))
 923                exit(128); /* error already reported */
 924        free_refs(list_head);
 925        free(to_fetch);
 926
 927        printf("\n");
 928        fflush(stdout);
 929        strbuf_reset(buf);
 930}
 931
 932static int push_dav(int nr_spec, char **specs)
 933{
 934        struct child_process child = CHILD_PROCESS_INIT;
 935        size_t i;
 936
 937        child.git_cmd = 1;
 938        argv_array_push(&child.args, "http-push");
 939        argv_array_push(&child.args, "--helper-status");
 940        if (options.dry_run)
 941                argv_array_push(&child.args, "--dry-run");
 942        if (options.verbosity > 1)
 943                argv_array_push(&child.args, "--verbose");
 944        argv_array_push(&child.args, url.buf);
 945        for (i = 0; i < nr_spec; i++)
 946                argv_array_push(&child.args, specs[i]);
 947
 948        if (run_command(&child))
 949                die("git-http-push failed");
 950        return 0;
 951}
 952
 953static int push_git(struct discovery *heads, int nr_spec, char **specs)
 954{
 955        struct rpc_state rpc;
 956        int i, err;
 957        struct argv_array args;
 958        struct string_list_item *cas_option;
 959        struct strbuf preamble = STRBUF_INIT;
 960
 961        argv_array_init(&args);
 962        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 963                         NULL);
 964
 965        if (options.thin)
 966                argv_array_push(&args, "--thin");
 967        if (options.dry_run)
 968                argv_array_push(&args, "--dry-run");
 969        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 970                argv_array_push(&args, "--signed=yes");
 971        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 972                argv_array_push(&args, "--signed=if-asked");
 973        if (options.verbosity == 0)
 974                argv_array_push(&args, "--quiet");
 975        else if (options.verbosity > 1)
 976                argv_array_push(&args, "--verbose");
 977        for (i = 0; i < options.push_options.nr; i++)
 978                argv_array_pushf(&args, "--push-option=%s",
 979                                 options.push_options.items[i].string);
 980        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 981        for_each_string_list_item(cas_option, &cas_options)
 982                argv_array_push(&args, cas_option->string);
 983        argv_array_push(&args, url.buf);
 984
 985        argv_array_push(&args, "--stdin");
 986        for (i = 0; i < nr_spec; i++)
 987                packet_buf_write(&preamble, "%s\n", specs[i]);
 988        packet_buf_flush(&preamble);
 989
 990        memset(&rpc, 0, sizeof(rpc));
 991        rpc.service_name = "git-receive-pack",
 992        rpc.argv = args.argv;
 993        rpc.stdin_preamble = &preamble;
 994
 995        err = rpc_service(&rpc, heads);
 996        if (rpc.result.len)
 997                write_or_die(1, rpc.result.buf, rpc.result.len);
 998        strbuf_release(&rpc.result);
 999        strbuf_release(&preamble);
1000        argv_array_clear(&args);
1001        return err;
1002}
1003
1004static int push(int nr_spec, char **specs)
1005{
1006        struct discovery *heads = discover_refs("git-receive-pack", 1);
1007        int ret;
1008
1009        if (heads->proto_git)
1010                ret = push_git(heads, nr_spec, specs);
1011        else
1012                ret = push_dav(nr_spec, specs);
1013        free_discovery(heads);
1014        return ret;
1015}
1016
1017static void parse_push(struct strbuf *buf)
1018{
1019        char **specs = NULL;
1020        int alloc_spec = 0, nr_spec = 0, i, ret;
1021
1022        do {
1023                if (starts_with(buf->buf, "push ")) {
1024                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1025                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1026                }
1027                else
1028                        die("http transport does not support %s", buf->buf);
1029
1030                strbuf_reset(buf);
1031                if (strbuf_getline_lf(buf, stdin) == EOF)
1032                        goto free_specs;
1033                if (!*buf->buf)
1034                        break;
1035        } while (1);
1036
1037        ret = push(nr_spec, specs);
1038        printf("\n");
1039        fflush(stdout);
1040
1041        if (ret)
1042                exit(128); /* error already reported */
1043
1044 free_specs:
1045        for (i = 0; i < nr_spec; i++)
1046                free(specs[i]);
1047        free(specs);
1048}
1049
1050int cmd_main(int argc, const char **argv)
1051{
1052        struct strbuf buf = STRBUF_INIT;
1053        int nongit;
1054
1055        setup_git_directory_gently(&nongit);
1056        if (argc < 2) {
1057                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1058                return 1;
1059        }
1060
1061        options.verbosity = 1;
1062        options.progress = !!isatty(2);
1063        options.thin = 1;
1064        string_list_init(&options.deepen_not, 1);
1065        string_list_init(&options.push_options, 1);
1066
1067        remote = remote_get(argv[1]);
1068
1069        if (argc > 2) {
1070                end_url_with_slash(&url, argv[2]);
1071        } else {
1072                end_url_with_slash(&url, remote->url[0]);
1073        }
1074
1075        http_init(remote, url.buf, 0);
1076
1077        do {
1078                const char *arg;
1079
1080                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1081                        if (ferror(stdin))
1082                                error("remote-curl: error reading command stream from git");
1083                        return 1;
1084                }
1085                if (buf.len == 0)
1086                        break;
1087                if (starts_with(buf.buf, "fetch ")) {
1088                        if (nongit)
1089                                die("remote-curl: fetch attempted without a local repo");
1090                        parse_fetch(&buf);
1091
1092                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1093                        int for_push = !!strstr(buf.buf + 4, "for-push");
1094                        output_refs(get_refs(for_push));
1095
1096                } else if (starts_with(buf.buf, "push ")) {
1097                        parse_push(&buf);
1098
1099                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1100                        char *value = strchr(arg, ' ');
1101                        int result;
1102
1103                        if (value)
1104                                *value++ = '\0';
1105                        else
1106                                value = "true";
1107
1108                        result = set_option(arg, value);
1109                        if (!result)
1110                                printf("ok\n");
1111                        else if (result < 0)
1112                                printf("error invalid value\n");
1113                        else
1114                                printf("unsupported\n");
1115                        fflush(stdout);
1116
1117                } else if (!strcmp(buf.buf, "capabilities")) {
1118                        printf("fetch\n");
1119                        printf("option\n");
1120                        printf("push\n");
1121                        printf("check-connectivity\n");
1122                        printf("\n");
1123                        fflush(stdout);
1124                } else {
1125                        error("remote-curl: unknown command '%s' from git", buf.buf);
1126                        return 1;
1127                }
1128                strbuf_reset(&buf);
1129        } while (1);
1130
1131        http_cleanup();
1132
1133        return 0;
1134}