Andrew's git / gitweb.git / remote-curl.c
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remote-curl.con commit upload-pack: introduce fetch server command (3145ea9)
   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        const 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);
 261        }
 262}
 263
 264static int show_http_message(struct strbuf *type, struct strbuf *charset,
 265                             struct strbuf *msg)
 266{
 267        const char *p, *eol;
 268
 269        /*
 270         * We only show text/plain parts, as other types are likely
 271         * to be ugly to look at on the user's terminal.
 272         */
 273        if (strcmp(type->buf, "text/plain"))
 274                return -1;
 275        if (charset->len)
 276                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 277
 278        strbuf_trim(msg);
 279        if (!msg->len)
 280                return -1;
 281
 282        p = msg->buf;
 283        do {
 284                eol = strchrnul(p, '\n');
 285                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 286                p = eol + 1;
 287        } while(*eol);
 288        return 0;
 289}
 290
 291static struct discovery *discover_refs(const char *service, int for_push)
 292{
 293        struct strbuf exp = STRBUF_INIT;
 294        struct strbuf type = STRBUF_INIT;
 295        struct strbuf charset = STRBUF_INIT;
 296        struct strbuf buffer = STRBUF_INIT;
 297        struct strbuf refs_url = STRBUF_INIT;
 298        struct strbuf effective_url = STRBUF_INIT;
 299        struct discovery *last = last_discovery;
 300        int http_ret, maybe_smart = 0;
 301        struct http_get_options http_options;
 302
 303        if (last && !strcmp(service, last->service))
 304                return last;
 305        free_discovery(last);
 306
 307        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 308        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 309             git_env_bool("GIT_SMART_HTTP", 1)) {
 310                maybe_smart = 1;
 311                if (!strchr(url.buf, '?'))
 312                        strbuf_addch(&refs_url, '?');
 313                else
 314                        strbuf_addch(&refs_url, '&');
 315                strbuf_addf(&refs_url, "service=%s", service);
 316        }
 317
 318        memset(&http_options, 0, sizeof(http_options));
 319        http_options.content_type = &type;
 320        http_options.charset = &charset;
 321        http_options.effective_url = &effective_url;
 322        http_options.base_url = &url;
 323        http_options.initial_request = 1;
 324        http_options.no_cache = 1;
 325        http_options.keep_error = 1;
 326
 327        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 328        switch (http_ret) {
 329        case HTTP_OK:
 330                break;
 331        case HTTP_MISSING_TARGET:
 332                show_http_message(&type, &charset, &buffer);
 333                die("repository '%s' not found", url.buf);
 334        case HTTP_NOAUTH:
 335                show_http_message(&type, &charset, &buffer);
 336                die("Authentication failed for '%s'", url.buf);
 337        default:
 338                show_http_message(&type, &charset, &buffer);
 339                die("unable to access '%s': %s", url.buf, curl_errorstr);
 340        }
 341
 342        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 343                warning(_("redirecting to %s"), url.buf);
 344
 345        last= xcalloc(1, sizeof(*last_discovery));
 346        last->service = service;
 347        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 348        last->buf = last->buf_alloc;
 349
 350        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 351        if (maybe_smart &&
 352            (5 <= last->len && last->buf[4] == '#') &&
 353            !strbuf_cmp(&exp, &type)) {
 354                char *line;
 355
 356                /*
 357                 * smart HTTP response; validate that the service
 358                 * pkt-line matches our request.
 359                 */
 360                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 361
 362                strbuf_reset(&exp);
 363                strbuf_addf(&exp, "# service=%s", service);
 364                if (strcmp(line, exp.buf))
 365                        die("invalid server response; got '%s'", line);
 366                strbuf_release(&exp);
 367
 368                /* The header can include additional metadata lines, up
 369                 * until a packet flush marker.  Ignore these now, but
 370                 * in the future we might start to scan them.
 371                 */
 372                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 373                        ;
 374
 375                last->proto_git = 1;
 376        }
 377
 378        if (last->proto_git)
 379                last->refs = parse_git_refs(last, for_push);
 380        else
 381                last->refs = parse_info_refs(last);
 382
 383        strbuf_release(&refs_url);
 384        strbuf_release(&exp);
 385        strbuf_release(&type);
 386        strbuf_release(&charset);
 387        strbuf_release(&effective_url);
 388        strbuf_release(&buffer);
 389        last_discovery = last;
 390        return last;
 391}
 392
 393static struct ref *get_refs(int for_push)
 394{
 395        struct discovery *heads;
 396
 397        if (for_push)
 398                heads = discover_refs("git-receive-pack", for_push);
 399        else
 400                heads = discover_refs("git-upload-pack", for_push);
 401
 402        return heads->refs;
 403}
 404
 405static void output_refs(struct ref *refs)
 406{
 407        struct ref *posn;
 408        for (posn = refs; posn; posn = posn->next) {
 409                if (posn->symref)
 410                        printf("@%s %s\n", posn->symref, posn->name);
 411                else
 412                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 413        }
 414        printf("\n");
 415        fflush(stdout);
 416}
 417
 418struct rpc_state {
 419        const char *service_name;
 420        const char **argv;
 421        struct strbuf *stdin_preamble;
 422        char *service_url;
 423        char *hdr_content_type;
 424        char *hdr_accept;
 425        char *buf;
 426        size_t alloc;
 427        size_t len;
 428        size_t pos;
 429        int in;
 430        int out;
 431        int any_written;
 432        struct strbuf result;
 433        unsigned gzip_request : 1;
 434        unsigned initial_buffer : 1;
 435};
 436
 437static size_t rpc_out(void *ptr, size_t eltsize,
 438                size_t nmemb, void *buffer_)
 439{
 440        size_t max = eltsize * nmemb;
 441        struct rpc_state *rpc = buffer_;
 442        size_t avail = rpc->len - rpc->pos;
 443
 444        if (!avail) {
 445                rpc->initial_buffer = 0;
 446                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 447                if (!avail)
 448                        return 0;
 449                rpc->pos = 0;
 450                rpc->len = avail;
 451        }
 452
 453        if (max < avail)
 454                avail = max;
 455        memcpy(ptr, rpc->buf + rpc->pos, avail);
 456        rpc->pos += avail;
 457        return avail;
 458}
 459
 460#ifndef NO_CURL_IOCTL
 461static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 462{
 463        struct rpc_state *rpc = clientp;
 464
 465        switch (cmd) {
 466        case CURLIOCMD_NOP:
 467                return CURLIOE_OK;
 468
 469        case CURLIOCMD_RESTARTREAD:
 470                if (rpc->initial_buffer) {
 471                        rpc->pos = 0;
 472                        return CURLIOE_OK;
 473                }
 474                error("unable to rewind rpc post data - try increasing http.postBuffer");
 475                return CURLIOE_FAILRESTART;
 476
 477        default:
 478                return CURLIOE_UNKNOWNCMD;
 479        }
 480}
 481#endif
 482
 483static size_t rpc_in(char *ptr, size_t eltsize,
 484                size_t nmemb, void *buffer_)
 485{
 486        size_t size = eltsize * nmemb;
 487        struct rpc_state *rpc = buffer_;
 488        if (size)
 489                rpc->any_written = 1;
 490        write_or_die(rpc->in, ptr, size);
 491        return size;
 492}
 493
 494static int run_slot(struct active_request_slot *slot,
 495                    struct slot_results *results)
 496{
 497        int err;
 498        struct slot_results results_buf;
 499
 500        if (!results)
 501                results = &results_buf;
 502
 503        err = run_one_slot(slot, results);
 504
 505        if (err != HTTP_OK && err != HTTP_REAUTH) {
 506                struct strbuf msg = STRBUF_INIT;
 507                if (results->http_code && results->http_code != 200)
 508                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 509                if (results->curl_result != CURLE_OK) {
 510                        if (msg.len)
 511                                strbuf_addch(&msg, ' ');
 512                        strbuf_addf(&msg, "curl %d", results->curl_result);
 513                        if (curl_errorstr[0]) {
 514                                strbuf_addch(&msg, ' ');
 515                                strbuf_addstr(&msg, curl_errorstr);
 516                        }
 517                }
 518                error("RPC failed; %s", msg.buf);
 519                strbuf_release(&msg);
 520        }
 521
 522        return err;
 523}
 524
 525static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 526{
 527        struct active_request_slot *slot;
 528        struct curl_slist *headers = http_copy_default_headers();
 529        struct strbuf buf = STRBUF_INIT;
 530        int err;
 531
 532        slot = get_active_slot();
 533
 534        headers = curl_slist_append(headers, rpc->hdr_content_type);
 535        headers = curl_slist_append(headers, rpc->hdr_accept);
 536
 537        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 538        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 539        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 540        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 541        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 542        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 543        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 544        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 545        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 546
 547        err = run_slot(slot, results);
 548
 549        curl_slist_free_all(headers);
 550        strbuf_release(&buf);
 551        return err;
 552}
 553
 554static curl_off_t xcurl_off_t(ssize_t len) {
 555        if (len > maximum_signed_value_of_type(curl_off_t))
 556                die("cannot handle pushes this big");
 557        return (curl_off_t) len;
 558}
 559
 560static int post_rpc(struct rpc_state *rpc)
 561{
 562        struct active_request_slot *slot;
 563        struct curl_slist *headers = http_copy_default_headers();
 564        int use_gzip = rpc->gzip_request;
 565        char *gzip_body = NULL;
 566        size_t gzip_size = 0;
 567        int err, large_request = 0;
 568        int needs_100_continue = 0;
 569
 570        /* Try to load the entire request, if we can fit it into the
 571         * allocated buffer space we can use HTTP/1.0 and avoid the
 572         * chunked encoding mess.
 573         */
 574        while (1) {
 575                size_t left = rpc->alloc - rpc->len;
 576                char *buf = rpc->buf + rpc->len;
 577                int n;
 578
 579                if (left < LARGE_PACKET_MAX) {
 580                        large_request = 1;
 581                        use_gzip = 0;
 582                        break;
 583                }
 584
 585                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 586                if (!n)
 587                        break;
 588                rpc->len += n;
 589        }
 590
 591        if (large_request) {
 592                struct slot_results results;
 593
 594                do {
 595                        err = probe_rpc(rpc, &results);
 596                        if (err == HTTP_REAUTH)
 597                                credential_fill(&http_auth);
 598                } while (err == HTTP_REAUTH);
 599                if (err != HTTP_OK)
 600                        return -1;
 601
 602                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 603                        needs_100_continue = 1;
 604        }
 605
 606        headers = curl_slist_append(headers, rpc->hdr_content_type);
 607        headers = curl_slist_append(headers, rpc->hdr_accept);
 608        headers = curl_slist_append(headers, needs_100_continue ?
 609                "Expect: 100-continue" : "Expect:");
 610
 611retry:
 612        slot = get_active_slot();
 613
 614        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 615        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 616        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 617        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 618
 619        if (large_request) {
 620                /* The request body is large and the size cannot be predicted.
 621                 * We must use chunked encoding to send it.
 622                 */
 623                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 624                rpc->initial_buffer = 1;
 625                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 626                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 627#ifndef NO_CURL_IOCTL
 628                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 629                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 630#endif
 631                if (options.verbosity > 1) {
 632                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 633                        fflush(stderr);
 634                }
 635
 636        } else if (gzip_body) {
 637                /*
 638                 * If we are looping to retry authentication, then the previous
 639                 * run will have set up the headers and gzip buffer already,
 640                 * and we just need to send it.
 641                 */
 642                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 643                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 644
 645        } else if (use_gzip && 1024 < rpc->len) {
 646                /* The client backend isn't giving us compressed data so
 647                 * we can try to deflate it ourselves, this may save on.
 648                 * the transfer time.
 649                 */
 650                git_zstream stream;
 651                int ret;
 652
 653                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 654                gzip_size = git_deflate_bound(&stream, rpc->len);
 655                gzip_body = xmalloc(gzip_size);
 656
 657                stream.next_in = (unsigned char *)rpc->buf;
 658                stream.avail_in = rpc->len;
 659                stream.next_out = (unsigned char *)gzip_body;
 660                stream.avail_out = gzip_size;
 661
 662                ret = git_deflate(&stream, Z_FINISH);
 663                if (ret != Z_STREAM_END)
 664                        die("cannot deflate request; zlib deflate error %d", ret);
 665
 666                ret = git_deflate_end_gently(&stream);
 667                if (ret != Z_OK)
 668                        die("cannot deflate request; zlib end error %d", ret);
 669
 670                gzip_size = stream.total_out;
 671
 672                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 673                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 674                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 675
 676                if (options.verbosity > 1) {
 677                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 678                                rpc->service_name,
 679                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 680                        fflush(stderr);
 681                }
 682        } else {
 683                /* We know the complete request size in advance, use the
 684                 * more normal Content-Length approach.
 685                 */
 686                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 687                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 688                if (options.verbosity > 1) {
 689                        fprintf(stderr, "POST %s (%lu bytes)\n",
 690                                rpc->service_name, (unsigned long)rpc->len);
 691                        fflush(stderr);
 692                }
 693        }
 694
 695        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 696        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 697        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 698
 699
 700        rpc->any_written = 0;
 701        err = run_slot(slot, NULL);
 702        if (err == HTTP_REAUTH && !large_request) {
 703                credential_fill(&http_auth);
 704                goto retry;
 705        }
 706        if (err != HTTP_OK)
 707                err = -1;
 708
 709        if (!rpc->any_written)
 710                err = -1;
 711
 712        curl_slist_free_all(headers);
 713        free(gzip_body);
 714        return err;
 715}
 716
 717static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 718{
 719        const char *svc = rpc->service_name;
 720        struct strbuf buf = STRBUF_INIT;
 721        struct strbuf *preamble = rpc->stdin_preamble;
 722        struct child_process client = CHILD_PROCESS_INIT;
 723        int err = 0;
 724
 725        client.in = -1;
 726        client.out = -1;
 727        client.git_cmd = 1;
 728        client.argv = rpc->argv;
 729        if (start_command(&client))
 730                exit(1);
 731        if (preamble)
 732                write_or_die(client.in, preamble->buf, preamble->len);
 733        if (heads)
 734                write_or_die(client.in, heads->buf, heads->len);
 735
 736        rpc->alloc = http_post_buffer;
 737        rpc->buf = xmalloc(rpc->alloc);
 738        rpc->in = client.in;
 739        rpc->out = client.out;
 740        strbuf_init(&rpc->result, 0);
 741
 742        strbuf_addf(&buf, "%s%s", url.buf, svc);
 743        rpc->service_url = strbuf_detach(&buf, NULL);
 744
 745        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 746        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 747
 748        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 749        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 750
 751        while (!err) {
 752                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 753                if (!n)
 754                        break;
 755                rpc->pos = 0;
 756                rpc->len = n;
 757                err |= post_rpc(rpc);
 758        }
 759
 760        close(client.in);
 761        client.in = -1;
 762        if (!err) {
 763                strbuf_read(&rpc->result, client.out, 0);
 764        } else {
 765                char buf[4096];
 766                for (;;)
 767                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 768                                break;
 769        }
 770
 771        close(client.out);
 772        client.out = -1;
 773
 774        err |= finish_command(&client);
 775        free(rpc->service_url);
 776        free(rpc->hdr_content_type);
 777        free(rpc->hdr_accept);
 778        free(rpc->buf);
 779        strbuf_release(&buf);
 780        return err;
 781}
 782
 783static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 784{
 785        struct walker *walker;
 786        char **targets;
 787        int ret, i;
 788
 789        ALLOC_ARRAY(targets, nr_heads);
 790        if (options.depth || options.deepen_since)
 791                die("dumb http transport does not support shallow capabilities");
 792        for (i = 0; i < nr_heads; i++)
 793                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 794
 795        walker = get_http_walker(url.buf);
 796        walker->get_all = 1;
 797        walker->get_tree = 1;
 798        walker->get_history = 1;
 799        walker->get_verbosely = options.verbosity >= 3;
 800        walker->get_recover = 0;
 801        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 802        walker_free(walker);
 803
 804        for (i = 0; i < nr_heads; i++)
 805                free(targets[i]);
 806        free(targets);
 807
 808        return ret ? error("fetch failed.") : 0;
 809}
 810
 811static int fetch_git(struct discovery *heads,
 812        int nr_heads, struct ref **to_fetch)
 813{
 814        struct rpc_state rpc;
 815        struct strbuf preamble = STRBUF_INIT;
 816        int i, err;
 817        struct argv_array args = ARGV_ARRAY_INIT;
 818
 819        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 820                         "--stdin", "--lock-pack", NULL);
 821        if (options.followtags)
 822                argv_array_push(&args, "--include-tag");
 823        if (options.thin)
 824                argv_array_push(&args, "--thin");
 825        if (options.verbosity >= 3)
 826                argv_array_pushl(&args, "-v", "-v", NULL);
 827        if (options.check_self_contained_and_connected)
 828                argv_array_push(&args, "--check-self-contained-and-connected");
 829        if (options.cloning)
 830                argv_array_push(&args, "--cloning");
 831        if (options.update_shallow)
 832                argv_array_push(&args, "--update-shallow");
 833        if (!options.progress)
 834                argv_array_push(&args, "--no-progress");
 835        if (options.depth)
 836                argv_array_pushf(&args, "--depth=%lu", options.depth);
 837        if (options.deepen_since)
 838                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 839        for (i = 0; i < options.deepen_not.nr; i++)
 840                argv_array_pushf(&args, "--shallow-exclude=%s",
 841                                 options.deepen_not.items[i].string);
 842        if (options.deepen_relative && options.depth)
 843                argv_array_push(&args, "--deepen-relative");
 844        argv_array_push(&args, url.buf);
 845
 846        for (i = 0; i < nr_heads; i++) {
 847                struct ref *ref = to_fetch[i];
 848                if (!*ref->name)
 849                        die("cannot fetch by sha1 over smart http");
 850                packet_buf_write(&preamble, "%s %s\n",
 851                                 oid_to_hex(&ref->old_oid), ref->name);
 852        }
 853        packet_buf_flush(&preamble);
 854
 855        memset(&rpc, 0, sizeof(rpc));
 856        rpc.service_name = "git-upload-pack",
 857        rpc.argv = args.argv;
 858        rpc.stdin_preamble = &preamble;
 859        rpc.gzip_request = 1;
 860
 861        err = rpc_service(&rpc, heads);
 862        if (rpc.result.len)
 863                write_or_die(1, rpc.result.buf, rpc.result.len);
 864        strbuf_release(&rpc.result);
 865        strbuf_release(&preamble);
 866        argv_array_clear(&args);
 867        return err;
 868}
 869
 870static int fetch(int nr_heads, struct ref **to_fetch)
 871{
 872        struct discovery *d = discover_refs("git-upload-pack", 0);
 873        if (d->proto_git)
 874                return fetch_git(d, nr_heads, to_fetch);
 875        else
 876                return fetch_dumb(nr_heads, to_fetch);
 877}
 878
 879static void parse_fetch(struct strbuf *buf)
 880{
 881        struct ref **to_fetch = NULL;
 882        struct ref *list_head = NULL;
 883        struct ref **list = &list_head;
 884        int alloc_heads = 0, nr_heads = 0;
 885
 886        do {
 887                const char *p;
 888                if (skip_prefix(buf->buf, "fetch ", &p)) {
 889                        const char *name;
 890                        struct ref *ref;
 891                        struct object_id old_oid;
 892
 893                        if (get_oid_hex(p, &old_oid))
 894                                die("protocol error: expected sha/ref, got %s'", p);
 895                        if (p[GIT_SHA1_HEXSZ] == ' ')
 896                                name = p + GIT_SHA1_HEXSZ + 1;
 897                        else if (!p[GIT_SHA1_HEXSZ])
 898                                name = "";
 899                        else
 900                                die("protocol error: expected sha/ref, got %s'", p);
 901
 902                        ref = alloc_ref(name);
 903                        oidcpy(&ref->old_oid, &old_oid);
 904
 905                        *list = ref;
 906                        list = &ref->next;
 907
 908                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 909                        to_fetch[nr_heads++] = ref;
 910                }
 911                else
 912                        die("http transport does not support %s", buf->buf);
 913
 914                strbuf_reset(buf);
 915                if (strbuf_getline_lf(buf, stdin) == EOF)
 916                        return;
 917                if (!*buf->buf)
 918                        break;
 919        } while (1);
 920
 921        if (fetch(nr_heads, to_fetch))
 922                exit(128); /* error already reported */
 923        free_refs(list_head);
 924        free(to_fetch);
 925
 926        printf("\n");
 927        fflush(stdout);
 928        strbuf_reset(buf);
 929}
 930
 931static int push_dav(int nr_spec, char **specs)
 932{
 933        struct child_process child = CHILD_PROCESS_INIT;
 934        size_t i;
 935
 936        child.git_cmd = 1;
 937        argv_array_push(&child.args, "http-push");
 938        argv_array_push(&child.args, "--helper-status");
 939        if (options.dry_run)
 940                argv_array_push(&child.args, "--dry-run");
 941        if (options.verbosity > 1)
 942                argv_array_push(&child.args, "--verbose");
 943        argv_array_push(&child.args, url.buf);
 944        for (i = 0; i < nr_spec; i++)
 945                argv_array_push(&child.args, specs[i]);
 946
 947        if (run_command(&child))
 948                die("git-http-push failed");
 949        return 0;
 950}
 951
 952static int push_git(struct discovery *heads, int nr_spec, char **specs)
 953{
 954        struct rpc_state rpc;
 955        int i, err;
 956        struct argv_array args;
 957        struct string_list_item *cas_option;
 958        struct strbuf preamble = STRBUF_INIT;
 959
 960        argv_array_init(&args);
 961        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 962                         NULL);
 963
 964        if (options.thin)
 965                argv_array_push(&args, "--thin");
 966        if (options.dry_run)
 967                argv_array_push(&args, "--dry-run");
 968        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 969                argv_array_push(&args, "--signed=yes");
 970        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 971                argv_array_push(&args, "--signed=if-asked");
 972        if (options.verbosity == 0)
 973                argv_array_push(&args, "--quiet");
 974        else if (options.verbosity > 1)
 975                argv_array_push(&args, "--verbose");
 976        for (i = 0; i < options.push_options.nr; i++)
 977                argv_array_pushf(&args, "--push-option=%s",
 978                                 options.push_options.items[i].string);
 979        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 980        for_each_string_list_item(cas_option, &cas_options)
 981                argv_array_push(&args, cas_option->string);
 982        argv_array_push(&args, url.buf);
 983
 984        argv_array_push(&args, "--stdin");
 985        for (i = 0; i < nr_spec; i++)
 986                packet_buf_write(&preamble, "%s\n", specs[i]);
 987        packet_buf_flush(&preamble);
 988
 989        memset(&rpc, 0, sizeof(rpc));
 990        rpc.service_name = "git-receive-pack",
 991        rpc.argv = args.argv;
 992        rpc.stdin_preamble = &preamble;
 993
 994        err = rpc_service(&rpc, heads);
 995        if (rpc.result.len)
 996                write_or_die(1, rpc.result.buf, rpc.result.len);
 997        strbuf_release(&rpc.result);
 998        strbuf_release(&preamble);
 999        argv_array_clear(&args);
1000        return err;
1001}
1002
1003static int push(int nr_spec, char **specs)
1004{
1005        struct discovery *heads = discover_refs("git-receive-pack", 1);
1006        int ret;
1007
1008        if (heads->proto_git)
1009                ret = push_git(heads, nr_spec, specs);
1010        else
1011                ret = push_dav(nr_spec, specs);
1012        free_discovery(heads);
1013        return ret;
1014}
1015
1016static void parse_push(struct strbuf *buf)
1017{
1018        char **specs = NULL;
1019        int alloc_spec = 0, nr_spec = 0, i, ret;
1020
1021        do {
1022                if (starts_with(buf->buf, "push ")) {
1023                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1024                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1025                }
1026                else
1027                        die("http transport does not support %s", buf->buf);
1028
1029                strbuf_reset(buf);
1030                if (strbuf_getline_lf(buf, stdin) == EOF)
1031                        goto free_specs;
1032                if (!*buf->buf)
1033                        break;
1034        } while (1);
1035
1036        ret = push(nr_spec, specs);
1037        printf("\n");
1038        fflush(stdout);
1039
1040        if (ret)
1041                exit(128); /* error already reported */
1042
1043 free_specs:
1044        for (i = 0; i < nr_spec; i++)
1045                free(specs[i]);
1046        free(specs);
1047}
1048
1049int cmd_main(int argc, const char **argv)
1050{
1051        struct strbuf buf = STRBUF_INIT;
1052        int nongit;
1053
1054        setup_git_directory_gently(&nongit);
1055        if (argc < 2) {
1056                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1057                return 1;
1058        }
1059
1060        options.verbosity = 1;
1061        options.progress = !!isatty(2);
1062        options.thin = 1;
1063        string_list_init(&options.deepen_not, 1);
1064        string_list_init(&options.push_options, 1);
1065
1066        remote = remote_get(argv[1]);
1067
1068        if (argc > 2) {
1069                end_url_with_slash(&url, argv[2]);
1070        } else {
1071                end_url_with_slash(&url, remote->url[0]);
1072        }
1073
1074        http_init(remote, url.buf, 0);
1075
1076        do {
1077                const char *arg;
1078
1079                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1080                        if (ferror(stdin))
1081                                error("remote-curl: error reading command stream from git");
1082                        return 1;
1083                }
1084                if (buf.len == 0)
1085                        break;
1086                if (starts_with(buf.buf, "fetch ")) {
1087                        if (nongit)
1088                                die("remote-curl: fetch attempted without a local repo");
1089                        parse_fetch(&buf);
1090
1091                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1092                        int for_push = !!strstr(buf.buf + 4, "for-push");
1093                        output_refs(get_refs(for_push));
1094
1095                } else if (starts_with(buf.buf, "push ")) {
1096                        parse_push(&buf);
1097
1098                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1099                        char *value = strchr(arg, ' ');
1100                        int result;
1101
1102                        if (value)
1103                                *value++ = '\0';
1104                        else
1105                                value = "true";
1106
1107                        result = set_option(arg, value);
1108                        if (!result)
1109                                printf("ok\n");
1110                        else if (result < 0)
1111                                printf("error invalid value\n");
1112                        else
1113                                printf("unsupported\n");
1114                        fflush(stdout);
1115
1116                } else if (!strcmp(buf.buf, "capabilities")) {
1117                        printf("fetch\n");
1118                        printf("option\n");
1119                        printf("push\n");
1120                        printf("check-connectivity\n");
1121                        printf("\n");
1122                        fflush(stdout);
1123                } else {
1124                        error("remote-curl: unknown command '%s' from git", buf.buf);
1125                        return 1;
1126                }
1127                strbuf_reset(&buf);
1128        } while (1);
1129
1130        http_cleanup();
1131
1132        return 0;
1133}