Andrew's git - gitweb.git/blob

9f6d07683d0bb6ec5bf1cc8ca293d701c4e9f916
   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_v1:
 189        case protocol_v0:
 190                get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
 191                                 NULL, &heads->shallow);
 192                break;
 193        case protocol_unknown_version:
 194                BUG("unknown protocol version");
 195        }
 196
 197        return list;
 198}
 199
 200static struct ref *parse_info_refs(struct discovery *heads)
 201{
 202        char *data, *start, *mid;
 203        char *ref_name;
 204        int i = 0;
 205
 206        struct ref *refs = NULL;
 207        struct ref *ref = NULL;
 208        struct ref *last_ref = NULL;
 209
 210        data = heads->buf;
 211        start = NULL;
 212        mid = data;
 213        while (i < heads->len) {
 214                if (!start) {
 215                        start = &data[i];
 216                }
 217                if (data[i] == '\t')
 218                        mid = &data[i];
 219                if (data[i] == '\n') {
 220                        if (mid - start != 40)
 221                                die("%sinfo/refs not valid: is this a git repository?",
 222                                    url.buf);
 223                        data[i] = 0;
 224                        ref_name = mid + 1;
 225                        ref = alloc_ref(ref_name);
 226                        get_oid_hex(start, &ref->old_oid);
 227                        if (!refs)
 228                                refs = ref;
 229                        if (last_ref)
 230                                last_ref->next = ref;
 231                        last_ref = ref;
 232                        start = NULL;
 233                }
 234                i++;
 235        }
 236
 237        ref = alloc_ref("HEAD");
 238        if (!http_fetch_ref(url.buf, ref) &&
 239            !resolve_remote_symref(ref, refs)) {
 240                ref->next = refs;
 241                refs = ref;
 242        } else {
 243                free(ref);
 244        }
 245
 246        return refs;
 247}
 248
 249static void free_discovery(struct discovery *d)
 250{
 251        if (d) {
 252                if (d == last_discovery)
 253                        last_discovery = NULL;
 254                free(d->shallow.oid);
 255                free(d->buf_alloc);
 256                free_refs(d->refs);
 257                free(d);
 258        }
 259}
 260
 261static int show_http_message(struct strbuf *type, struct strbuf *charset,
 262                             struct strbuf *msg)
 263{
 264        const char *p, *eol;
 265
 266        /*
 267         * We only show text/plain parts, as other types are likely
 268         * to be ugly to look at on the user's terminal.
 269         */
 270        if (strcmp(type->buf, "text/plain"))
 271                return -1;
 272        if (charset->len)
 273                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 274
 275        strbuf_trim(msg);
 276        if (!msg->len)
 277                return -1;
 278
 279        p = msg->buf;
 280        do {
 281                eol = strchrnul(p, '\n');
 282                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 283                p = eol + 1;
 284        } while(*eol);
 285        return 0;
 286}
 287
 288static struct discovery *discover_refs(const char *service, int for_push)
 289{
 290        struct strbuf exp = STRBUF_INIT;
 291        struct strbuf type = STRBUF_INIT;
 292        struct strbuf charset = STRBUF_INIT;
 293        struct strbuf buffer = STRBUF_INIT;
 294        struct strbuf refs_url = STRBUF_INIT;
 295        struct strbuf effective_url = STRBUF_INIT;
 296        struct discovery *last = last_discovery;
 297        int http_ret, maybe_smart = 0;
 298        struct http_get_options http_options;
 299
 300        if (last && !strcmp(service, last->service))
 301                return last;
 302        free_discovery(last);
 303
 304        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 305        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 306             git_env_bool("GIT_SMART_HTTP", 1)) {
 307                maybe_smart = 1;
 308                if (!strchr(url.buf, '?'))
 309                        strbuf_addch(&refs_url, '?');
 310                else
 311                        strbuf_addch(&refs_url, '&');
 312                strbuf_addf(&refs_url, "service=%s", service);
 313        }
 314
 315        memset(&http_options, 0, sizeof(http_options));
 316        http_options.content_type = &type;
 317        http_options.charset = &charset;
 318        http_options.effective_url = &effective_url;
 319        http_options.base_url = &url;
 320        http_options.initial_request = 1;
 321        http_options.no_cache = 1;
 322        http_options.keep_error = 1;
 323
 324        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 325        switch (http_ret) {
 326        case HTTP_OK:
 327                break;
 328        case HTTP_MISSING_TARGET:
 329                show_http_message(&type, &charset, &buffer);
 330                die("repository '%s' not found", url.buf);
 331        case HTTP_NOAUTH:
 332                show_http_message(&type, &charset, &buffer);
 333                die("Authentication failed for '%s'", url.buf);
 334        default:
 335                show_http_message(&type, &charset, &buffer);
 336                die("unable to access '%s': %s", url.buf, curl_errorstr);
 337        }
 338
 339        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 340                warning(_("redirecting to %s"), url.buf);
 341
 342        last= xcalloc(1, sizeof(*last_discovery));
 343        last->service = service;
 344        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 345        last->buf = last->buf_alloc;
 346
 347        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 348        if (maybe_smart &&
 349            (5 <= last->len && last->buf[4] == '#') &&
 350            !strbuf_cmp(&exp, &type)) {
 351                char *line;
 352
 353                /*
 354                 * smart HTTP response; validate that the service
 355                 * pkt-line matches our request.
 356                 */
 357                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 358
 359                strbuf_reset(&exp);
 360                strbuf_addf(&exp, "# service=%s", service);
 361                if (strcmp(line, exp.buf))
 362                        die("invalid server response; got '%s'", line);
 363                strbuf_release(&exp);
 364
 365                /* The header can include additional metadata lines, up
 366                 * until a packet flush marker.  Ignore these now, but
 367                 * in the future we might start to scan them.
 368                 */
 369                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 370                        ;
 371
 372                last->proto_git = 1;
 373        }
 374
 375        if (last->proto_git)
 376                last->refs = parse_git_refs(last, for_push);
 377        else
 378                last->refs = parse_info_refs(last);
 379
 380        strbuf_release(&refs_url);
 381        strbuf_release(&exp);
 382        strbuf_release(&type);
 383        strbuf_release(&charset);
 384        strbuf_release(&effective_url);
 385        strbuf_release(&buffer);
 386        last_discovery = last;
 387        return last;
 388}
 389
 390static struct ref *get_refs(int for_push)
 391{
 392        struct discovery *heads;
 393
 394        if (for_push)
 395                heads = discover_refs("git-receive-pack", for_push);
 396        else
 397                heads = discover_refs("git-upload-pack", for_push);
 398
 399        return heads->refs;
 400}
 401
 402static void output_refs(struct ref *refs)
 403{
 404        struct ref *posn;
 405        for (posn = refs; posn; posn = posn->next) {
 406                if (posn->symref)
 407                        printf("@%s %s\n", posn->symref, posn->name);
 408                else
 409                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 410        }
 411        printf("\n");
 412        fflush(stdout);
 413}
 414
 415struct rpc_state {
 416        const char *service_name;
 417        const char **argv;
 418        struct strbuf *stdin_preamble;
 419        char *service_url;
 420        char *hdr_content_type;
 421        char *hdr_accept;
 422        char *buf;
 423        size_t alloc;
 424        size_t len;
 425        size_t pos;
 426        int in;
 427        int out;
 428        int any_written;
 429        struct strbuf result;
 430        unsigned gzip_request : 1;
 431        unsigned initial_buffer : 1;
 432};
 433
 434static size_t rpc_out(void *ptr, size_t eltsize,
 435                size_t nmemb, void *buffer_)
 436{
 437        size_t max = eltsize * nmemb;
 438        struct rpc_state *rpc = buffer_;
 439        size_t avail = rpc->len - rpc->pos;
 440
 441        if (!avail) {
 442                rpc->initial_buffer = 0;
 443                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 444                if (!avail)
 445                        return 0;
 446                rpc->pos = 0;
 447                rpc->len = avail;
 448        }
 449
 450        if (max < avail)
 451                avail = max;
 452        memcpy(ptr, rpc->buf + rpc->pos, avail);
 453        rpc->pos += avail;
 454        return avail;
 455}
 456
 457#ifndef NO_CURL_IOCTL
 458static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 459{
 460        struct rpc_state *rpc = clientp;
 461
 462        switch (cmd) {
 463        case CURLIOCMD_NOP:
 464                return CURLIOE_OK;
 465
 466        case CURLIOCMD_RESTARTREAD:
 467                if (rpc->initial_buffer) {
 468                        rpc->pos = 0;
 469                        return CURLIOE_OK;
 470                }
 471                error("unable to rewind rpc post data - try increasing http.postBuffer");
 472                return CURLIOE_FAILRESTART;
 473
 474        default:
 475                return CURLIOE_UNKNOWNCMD;
 476        }
 477}
 478#endif
 479
 480static size_t rpc_in(char *ptr, size_t eltsize,
 481                size_t nmemb, void *buffer_)
 482{
 483        size_t size = eltsize * nmemb;
 484        struct rpc_state *rpc = buffer_;
 485        if (size)
 486                rpc->any_written = 1;
 487        write_or_die(rpc->in, ptr, size);
 488        return size;
 489}
 490
 491static int run_slot(struct active_request_slot *slot,
 492                    struct slot_results *results)
 493{
 494        int err;
 495        struct slot_results results_buf;
 496
 497        if (!results)
 498                results = &results_buf;
 499
 500        err = run_one_slot(slot, results);
 501
 502        if (err != HTTP_OK && err != HTTP_REAUTH) {
 503                struct strbuf msg = STRBUF_INIT;
 504                if (results->http_code && results->http_code != 200)
 505                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 506                if (results->curl_result != CURLE_OK) {
 507                        if (msg.len)
 508                                strbuf_addch(&msg, ' ');
 509                        strbuf_addf(&msg, "curl %d", results->curl_result);
 510                        if (curl_errorstr[0]) {
 511                                strbuf_addch(&msg, ' ');
 512                                strbuf_addstr(&msg, curl_errorstr);
 513                        }
 514                }
 515                error("RPC failed; %s", msg.buf);
 516                strbuf_release(&msg);
 517        }
 518
 519        return err;
 520}
 521
 522static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 523{
 524        struct active_request_slot *slot;
 525        struct curl_slist *headers = http_copy_default_headers();
 526        struct strbuf buf = STRBUF_INIT;
 527        int err;
 528
 529        slot = get_active_slot();
 530
 531        headers = curl_slist_append(headers, rpc->hdr_content_type);
 532        headers = curl_slist_append(headers, rpc->hdr_accept);
 533
 534        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 535        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 536        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 537        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 538        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 539        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 540        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 541        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 542        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 543
 544        err = run_slot(slot, results);
 545
 546        curl_slist_free_all(headers);
 547        strbuf_release(&buf);
 548        return err;
 549}
 550
 551static curl_off_t xcurl_off_t(ssize_t len) {
 552        if (len > maximum_signed_value_of_type(curl_off_t))
 553                die("cannot handle pushes this big");
 554        return (curl_off_t) len;
 555}
 556
 557static int post_rpc(struct rpc_state *rpc)
 558{
 559        struct active_request_slot *slot;
 560        struct curl_slist *headers = http_copy_default_headers();
 561        int use_gzip = rpc->gzip_request;
 562        char *gzip_body = NULL;
 563        size_t gzip_size = 0;
 564        int err, large_request = 0;
 565        int needs_100_continue = 0;
 566
 567        /* Try to load the entire request, if we can fit it into the
 568         * allocated buffer space we can use HTTP/1.0 and avoid the
 569         * chunked encoding mess.
 570         */
 571        while (1) {
 572                size_t left = rpc->alloc - rpc->len;
 573                char *buf = rpc->buf + rpc->len;
 574                int n;
 575
 576                if (left < LARGE_PACKET_MAX) {
 577                        large_request = 1;
 578                        use_gzip = 0;
 579                        break;
 580                }
 581
 582                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 583                if (!n)
 584                        break;
 585                rpc->len += n;
 586        }
 587
 588        if (large_request) {
 589                struct slot_results results;
 590
 591                do {
 592                        err = probe_rpc(rpc, &results);
 593                        if (err == HTTP_REAUTH)
 594                                credential_fill(&http_auth);
 595                } while (err == HTTP_REAUTH);
 596                if (err != HTTP_OK)
 597                        return -1;
 598
 599                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 600                        needs_100_continue = 1;
 601        }
 602
 603        headers = curl_slist_append(headers, rpc->hdr_content_type);
 604        headers = curl_slist_append(headers, rpc->hdr_accept);
 605        headers = curl_slist_append(headers, needs_100_continue ?
 606                "Expect: 100-continue" : "Expect:");
 607
 608retry:
 609        slot = get_active_slot();
 610
 611        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 612        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 613        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 614        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 615
 616        if (large_request) {
 617                /* The request body is large and the size cannot be predicted.
 618                 * We must use chunked encoding to send it.
 619                 */
 620                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 621                rpc->initial_buffer = 1;
 622                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 623                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 624#ifndef NO_CURL_IOCTL
 625                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 626                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 627#endif
 628                if (options.verbosity > 1) {
 629                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 630                        fflush(stderr);
 631                }
 632
 633        } else if (gzip_body) {
 634                /*
 635                 * If we are looping to retry authentication, then the previous
 636                 * run will have set up the headers and gzip buffer already,
 637                 * and we just need to send it.
 638                 */
 639                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 640                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 641
 642        } else if (use_gzip && 1024 < rpc->len) {
 643                /* The client backend isn't giving us compressed data so
 644                 * we can try to deflate it ourselves, this may save on.
 645                 * the transfer time.
 646                 */
 647                git_zstream stream;
 648                int ret;
 649
 650                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 651                gzip_size = git_deflate_bound(&stream, rpc->len);
 652                gzip_body = xmalloc(gzip_size);
 653
 654                stream.next_in = (unsigned char *)rpc->buf;
 655                stream.avail_in = rpc->len;
 656                stream.next_out = (unsigned char *)gzip_body;
 657                stream.avail_out = gzip_size;
 658
 659                ret = git_deflate(&stream, Z_FINISH);
 660                if (ret != Z_STREAM_END)
 661                        die("cannot deflate request; zlib deflate error %d", ret);
 662
 663                ret = git_deflate_end_gently(&stream);
 664                if (ret != Z_OK)
 665                        die("cannot deflate request; zlib end error %d", ret);
 666
 667                gzip_size = stream.total_out;
 668
 669                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 670                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 671                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 672
 673                if (options.verbosity > 1) {
 674                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 675                                rpc->service_name,
 676                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 677                        fflush(stderr);
 678                }
 679        } else {
 680                /* We know the complete request size in advance, use the
 681                 * more normal Content-Length approach.
 682                 */
 683                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 684                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 685                if (options.verbosity > 1) {
 686                        fprintf(stderr, "POST %s (%lu bytes)\n",
 687                                rpc->service_name, (unsigned long)rpc->len);
 688                        fflush(stderr);
 689                }
 690        }
 691
 692        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 693        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 694        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 695
 696
 697        rpc->any_written = 0;
 698        err = run_slot(slot, NULL);
 699        if (err == HTTP_REAUTH && !large_request) {
 700                credential_fill(&http_auth);
 701                goto retry;
 702        }
 703        if (err != HTTP_OK)
 704                err = -1;
 705
 706        if (!rpc->any_written)
 707                err = -1;
 708
 709        curl_slist_free_all(headers);
 710        free(gzip_body);
 711        return err;
 712}
 713
 714static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 715{
 716        const char *svc = rpc->service_name;
 717        struct strbuf buf = STRBUF_INIT;
 718        struct strbuf *preamble = rpc->stdin_preamble;
 719        struct child_process client = CHILD_PROCESS_INIT;
 720        int err = 0;
 721
 722        client.in = -1;
 723        client.out = -1;
 724        client.git_cmd = 1;
 725        client.argv = rpc->argv;
 726        if (start_command(&client))
 727                exit(1);
 728        if (preamble)
 729                write_or_die(client.in, preamble->buf, preamble->len);
 730        if (heads)
 731                write_or_die(client.in, heads->buf, heads->len);
 732
 733        rpc->alloc = http_post_buffer;
 734        rpc->buf = xmalloc(rpc->alloc);
 735        rpc->in = client.in;
 736        rpc->out = client.out;
 737        strbuf_init(&rpc->result, 0);
 738
 739        strbuf_addf(&buf, "%s%s", url.buf, svc);
 740        rpc->service_url = strbuf_detach(&buf, NULL);
 741
 742        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 743        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 744
 745        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 746        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 747
 748        while (!err) {
 749                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 750                if (!n)
 751                        break;
 752                rpc->pos = 0;
 753                rpc->len = n;
 754                err |= post_rpc(rpc);
 755        }
 756
 757        close(client.in);
 758        client.in = -1;
 759        if (!err) {
 760                strbuf_read(&rpc->result, client.out, 0);
 761        } else {
 762                char buf[4096];
 763                for (;;)
 764                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 765                                break;
 766        }
 767
 768        close(client.out);
 769        client.out = -1;
 770
 771        err |= finish_command(&client);
 772        free(rpc->service_url);
 773        free(rpc->hdr_content_type);
 774        free(rpc->hdr_accept);
 775        free(rpc->buf);
 776        strbuf_release(&buf);
 777        return err;
 778}
 779
 780static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 781{
 782        struct walker *walker;
 783        char **targets;
 784        int ret, i;
 785
 786        ALLOC_ARRAY(targets, nr_heads);
 787        if (options.depth || options.deepen_since)
 788                die("dumb http transport does not support shallow capabilities");
 789        for (i = 0; i < nr_heads; i++)
 790                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 791
 792        walker = get_http_walker(url.buf);
 793        walker->get_all = 1;
 794        walker->get_tree = 1;
 795        walker->get_history = 1;
 796        walker->get_verbosely = options.verbosity >= 3;
 797        walker->get_recover = 0;
 798        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 799        walker_free(walker);
 800
 801        for (i = 0; i < nr_heads; i++)
 802                free(targets[i]);
 803        free(targets);
 804
 805        return ret ? error("fetch failed.") : 0;
 806}
 807
 808static int fetch_git(struct discovery *heads,
 809        int nr_heads, struct ref **to_fetch)
 810{
 811        struct rpc_state rpc;
 812        struct strbuf preamble = STRBUF_INIT;
 813        int i, err;
 814        struct argv_array args = ARGV_ARRAY_INIT;
 815
 816        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 817                         "--stdin", "--lock-pack", NULL);
 818        if (options.followtags)
 819                argv_array_push(&args, "--include-tag");
 820        if (options.thin)
 821                argv_array_push(&args, "--thin");
 822        if (options.verbosity >= 3)
 823                argv_array_pushl(&args, "-v", "-v", NULL);
 824        if (options.check_self_contained_and_connected)
 825                argv_array_push(&args, "--check-self-contained-and-connected");
 826        if (options.cloning)
 827                argv_array_push(&args, "--cloning");
 828        if (options.update_shallow)
 829                argv_array_push(&args, "--update-shallow");
 830        if (!options.progress)
 831                argv_array_push(&args, "--no-progress");
 832        if (options.depth)
 833                argv_array_pushf(&args, "--depth=%lu", options.depth);
 834        if (options.deepen_since)
 835                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 836        for (i = 0; i < options.deepen_not.nr; i++)
 837                argv_array_pushf(&args, "--shallow-exclude=%s",
 838                                 options.deepen_not.items[i].string);
 839        if (options.deepen_relative && options.depth)
 840                argv_array_push(&args, "--deepen-relative");
 841        argv_array_push(&args, url.buf);
 842
 843        for (i = 0; i < nr_heads; i++) {
 844                struct ref *ref = to_fetch[i];
 845                if (!*ref->name)
 846                        die("cannot fetch by sha1 over smart http");
 847                packet_buf_write(&preamble, "%s %s\n",
 848                                 oid_to_hex(&ref->old_oid), ref->name);
 849        }
 850        packet_buf_flush(&preamble);
 851
 852        memset(&rpc, 0, sizeof(rpc));
 853        rpc.service_name = "git-upload-pack",
 854        rpc.argv = args.argv;
 855        rpc.stdin_preamble = &preamble;
 856        rpc.gzip_request = 1;
 857
 858        err = rpc_service(&rpc, heads);
 859        if (rpc.result.len)
 860                write_or_die(1, rpc.result.buf, rpc.result.len);
 861        strbuf_release(&rpc.result);
 862        strbuf_release(&preamble);
 863        argv_array_clear(&args);
 864        return err;
 865}
 866
 867static int fetch(int nr_heads, struct ref **to_fetch)
 868{
 869        struct discovery *d = discover_refs("git-upload-pack", 0);
 870        if (d->proto_git)
 871                return fetch_git(d, nr_heads, to_fetch);
 872        else
 873                return fetch_dumb(nr_heads, to_fetch);
 874}
 875
 876static void parse_fetch(struct strbuf *buf)
 877{
 878        struct ref **to_fetch = NULL;
 879        struct ref *list_head = NULL;
 880        struct ref **list = &list_head;
 881        int alloc_heads = 0, nr_heads = 0;
 882
 883        do {
 884                const char *p;
 885                if (skip_prefix(buf->buf, "fetch ", &p)) {
 886                        const char *name;
 887                        struct ref *ref;
 888                        struct object_id old_oid;
 889
 890                        if (get_oid_hex(p, &old_oid))
 891                                die("protocol error: expected sha/ref, got %s'", p);
 892                        if (p[GIT_SHA1_HEXSZ] == ' ')
 893                                name = p + GIT_SHA1_HEXSZ + 1;
 894                        else if (!p[GIT_SHA1_HEXSZ])
 895                                name = "";
 896                        else
 897                                die("protocol error: expected sha/ref, got %s'", p);
 898
 899                        ref = alloc_ref(name);
 900                        oidcpy(&ref->old_oid, &old_oid);
 901
 902                        *list = ref;
 903                        list = &ref->next;
 904
 905                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 906                        to_fetch[nr_heads++] = ref;
 907                }
 908                else
 909                        die("http transport does not support %s", buf->buf);
 910
 911                strbuf_reset(buf);
 912                if (strbuf_getline_lf(buf, stdin) == EOF)
 913                        return;
 914                if (!*buf->buf)
 915                        break;
 916        } while (1);
 917
 918        if (fetch(nr_heads, to_fetch))
 919                exit(128); /* error already reported */
 920        free_refs(list_head);
 921        free(to_fetch);
 922
 923        printf("\n");
 924        fflush(stdout);
 925        strbuf_reset(buf);
 926}
 927
 928static int push_dav(int nr_spec, char **specs)
 929{
 930        struct child_process child = CHILD_PROCESS_INIT;
 931        size_t i;
 932
 933        child.git_cmd = 1;
 934        argv_array_push(&child.args, "http-push");
 935        argv_array_push(&child.args, "--helper-status");
 936        if (options.dry_run)
 937                argv_array_push(&child.args, "--dry-run");
 938        if (options.verbosity > 1)
 939                argv_array_push(&child.args, "--verbose");
 940        argv_array_push(&child.args, url.buf);
 941        for (i = 0; i < nr_spec; i++)
 942                argv_array_push(&child.args, specs[i]);
 943
 944        if (run_command(&child))
 945                die("git-http-push failed");
 946        return 0;
 947}
 948
 949static int push_git(struct discovery *heads, int nr_spec, char **specs)
 950{
 951        struct rpc_state rpc;
 952        int i, err;
 953        struct argv_array args;
 954        struct string_list_item *cas_option;
 955        struct strbuf preamble = STRBUF_INIT;
 956
 957        argv_array_init(&args);
 958        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 959                         NULL);
 960
 961        if (options.thin)
 962                argv_array_push(&args, "--thin");
 963        if (options.dry_run)
 964                argv_array_push(&args, "--dry-run");
 965        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 966                argv_array_push(&args, "--signed=yes");
 967        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 968                argv_array_push(&args, "--signed=if-asked");
 969        if (options.verbosity == 0)
 970                argv_array_push(&args, "--quiet");
 971        else if (options.verbosity > 1)
 972                argv_array_push(&args, "--verbose");
 973        for (i = 0; i < options.push_options.nr; i++)
 974                argv_array_pushf(&args, "--push-option=%s",
 975                                 options.push_options.items[i].string);
 976        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 977        for_each_string_list_item(cas_option, &cas_options)
 978                argv_array_push(&args, cas_option->string);
 979        argv_array_push(&args, url.buf);
 980
 981        argv_array_push(&args, "--stdin");
 982        for (i = 0; i < nr_spec; i++)
 983                packet_buf_write(&preamble, "%s\n", specs[i]);
 984        packet_buf_flush(&preamble);
 985
 986        memset(&rpc, 0, sizeof(rpc));
 987        rpc.service_name = "git-receive-pack",
 988        rpc.argv = args.argv;
 989        rpc.stdin_preamble = &preamble;
 990
 991        err = rpc_service(&rpc, heads);
 992        if (rpc.result.len)
 993                write_or_die(1, rpc.result.buf, rpc.result.len);
 994        strbuf_release(&rpc.result);
 995        strbuf_release(&preamble);
 996        argv_array_clear(&args);
 997        return err;
 998}
 999
1000static int push(int nr_spec, char **specs)
1001{
1002        struct discovery *heads = discover_refs("git-receive-pack", 1);
1003        int ret;
1004
1005        if (heads->proto_git)
1006                ret = push_git(heads, nr_spec, specs);
1007        else
1008                ret = push_dav(nr_spec, specs);
1009        free_discovery(heads);
1010        return ret;
1011}
1012
1013static void parse_push(struct strbuf *buf)
1014{
1015        char **specs = NULL;
1016        int alloc_spec = 0, nr_spec = 0, i, ret;
1017
1018        do {
1019                if (starts_with(buf->buf, "push ")) {
1020                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1021                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1022                }
1023                else
1024                        die("http transport does not support %s", buf->buf);
1025
1026                strbuf_reset(buf);
1027                if (strbuf_getline_lf(buf, stdin) == EOF)
1028                        goto free_specs;
1029                if (!*buf->buf)
1030                        break;
1031        } while (1);
1032
1033        ret = push(nr_spec, specs);
1034        printf("\n");
1035        fflush(stdout);
1036
1037        if (ret)
1038                exit(128); /* error already reported */
1039
1040 free_specs:
1041        for (i = 0; i < nr_spec; i++)
1042                free(specs[i]);
1043        free(specs);
1044}
1045
1046int cmd_main(int argc, const char **argv)
1047{
1048        struct strbuf buf = STRBUF_INIT;
1049        int nongit;
1050
1051        setup_git_directory_gently(&nongit);
1052        if (argc < 2) {
1053                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1054                return 1;
1055        }
1056
1057        options.verbosity = 1;
1058        options.progress = !!isatty(2);
1059        options.thin = 1;
1060        string_list_init(&options.deepen_not, 1);
1061        string_list_init(&options.push_options, 1);
1062
1063        remote = remote_get(argv[1]);
1064
1065        if (argc > 2) {
1066                end_url_with_slash(&url, argv[2]);
1067        } else {
1068                end_url_with_slash(&url, remote->url[0]);
1069        }
1070
1071        http_init(remote, url.buf, 0);
1072
1073        do {
1074                const char *arg;
1075
1076                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1077                        if (ferror(stdin))
1078                                error("remote-curl: error reading command stream from git");
1079                        return 1;
1080                }
1081                if (buf.len == 0)
1082                        break;
1083                if (starts_with(buf.buf, "fetch ")) {
1084                        if (nongit)
1085                                die("remote-curl: fetch attempted without a local repo");
1086                        parse_fetch(&buf);
1087
1088                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1089                        int for_push = !!strstr(buf.buf + 4, "for-push");
1090                        output_refs(get_refs(for_push));
1091
1092                } else if (starts_with(buf.buf, "push ")) {
1093                        parse_push(&buf);
1094
1095                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1096                        char *value = strchr(arg, ' ');
1097                        int result;
1098
1099                        if (value)
1100                                *value++ = '\0';
1101                        else
1102                                value = "true";
1103
1104                        result = set_option(arg, value);
1105                        if (!result)
1106                                printf("ok\n");
1107                        else if (result < 0)
1108                                printf("error invalid value\n");
1109                        else
1110                                printf("unsupported\n");
1111                        fflush(stdout);
1112
1113                } else if (!strcmp(buf.buf, "capabilities")) {
1114                        printf("fetch\n");
1115                        printf("option\n");
1116                        printf("push\n");
1117                        printf("check-connectivity\n");
1118                        printf("\n");
1119                        fflush(stdout);
1120                } else {
1121                        error("remote-curl: unknown command '%s' from git", buf.buf);
1122                        return 1;
1123                }
1124                strbuf_reset(&buf);
1125        } while (1);
1126
1127        http_cleanup();
1128
1129        return 0;
1130}