Andrew's git / gitweb.git / remote-curl.c
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remote-curl.con commit refs: add expand_ref() (41da711)
   1#include "cache.h"
   2#include "remote.h"
   3#include "strbuf.h"
   4#include "walker.h"
   5#include "http.h"
   6#include "exec_cmd.h"
   7#include "run-command.h"
   8#include "pkt-line.h"
   9#include "string-list.h"
  10#include "sideband.h"
  11#include "argv-array.h"
  12#include "credential.h"
  13#include "sha1-array.h"
  14#include "send-pack.h"
  15
  16static struct remote *remote;
  17/* always ends with a trailing slash */
  18static struct strbuf url = STRBUF_INIT;
  19
  20struct options {
  21        int verbosity;
  22        unsigned long depth;
  23        char *deepen_since;
  24        unsigned progress : 1,
  25                check_self_contained_and_connected : 1,
  26                cloning : 1,
  27                update_shallow : 1,
  28                followtags : 1,
  29                dry_run : 1,
  30                thin : 1,
  31                /* One of the SEND_PACK_PUSH_CERT_* constants. */
  32                push_cert : 2;
  33};
  34static struct options options;
  35static struct string_list cas_options = STRING_LIST_INIT_DUP;
  36
  37static int set_option(const char *name, const char *value)
  38{
  39        if (!strcmp(name, "verbosity")) {
  40                char *end;
  41                int v = strtol(value, &end, 10);
  42                if (value == end || *end)
  43                        return -1;
  44                options.verbosity = v;
  45                return 0;
  46        }
  47        else if (!strcmp(name, "progress")) {
  48                if (!strcmp(value, "true"))
  49                        options.progress = 1;
  50                else if (!strcmp(value, "false"))
  51                        options.progress = 0;
  52                else
  53                        return -1;
  54                return 0;
  55        }
  56        else if (!strcmp(name, "depth")) {
  57                char *end;
  58                unsigned long v = strtoul(value, &end, 10);
  59                if (value == end || *end)
  60                        return -1;
  61                options.depth = v;
  62                return 0;
  63        }
  64        else if (!strcmp(name, "deepen-since")) {
  65                options.deepen_since = xstrdup(value);
  66                return 0;
  67        }
  68        else if (!strcmp(name, "followtags")) {
  69                if (!strcmp(value, "true"))
  70                        options.followtags = 1;
  71                else if (!strcmp(value, "false"))
  72                        options.followtags = 0;
  73                else
  74                        return -1;
  75                return 0;
  76        }
  77        else if (!strcmp(name, "dry-run")) {
  78                if (!strcmp(value, "true"))
  79                        options.dry_run = 1;
  80                else if (!strcmp(value, "false"))
  81                        options.dry_run = 0;
  82                else
  83                        return -1;
  84                return 0;
  85        }
  86        else if (!strcmp(name, "check-connectivity")) {
  87                if (!strcmp(value, "true"))
  88                        options.check_self_contained_and_connected = 1;
  89                else if (!strcmp(value, "false"))
  90                        options.check_self_contained_and_connected = 0;
  91                else
  92                        return -1;
  93                return 0;
  94        }
  95        else if (!strcmp(name, "cas")) {
  96                struct strbuf val = STRBUF_INIT;
  97                strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
  98                string_list_append(&cas_options, val.buf);
  99                strbuf_release(&val);
 100                return 0;
 101        } else if (!strcmp(name, "cloning")) {
 102                if (!strcmp(value, "true"))
 103                        options.cloning = 1;
 104                else if (!strcmp(value, "false"))
 105                        options.cloning = 0;
 106                else
 107                        return -1;
 108                return 0;
 109        } else if (!strcmp(name, "update-shallow")) {
 110                if (!strcmp(value, "true"))
 111                        options.update_shallow = 1;
 112                else if (!strcmp(value, "false"))
 113                        options.update_shallow = 0;
 114                else
 115                        return -1;
 116                return 0;
 117        } else if (!strcmp(name, "pushcert")) {
 118                if (!strcmp(value, "true"))
 119                        options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 120                else if (!strcmp(value, "false"))
 121                        options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 122                else if (!strcmp(value, "if-asked"))
 123                        options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 124                else
 125                        return -1;
 126                return 0;
 127        } else {
 128                return 1 /* unsupported */;
 129        }
 130}
 131
 132struct discovery {
 133        const char *service;
 134        char *buf_alloc;
 135        char *buf;
 136        size_t len;
 137        struct ref *refs;
 138        struct sha1_array shallow;
 139        unsigned proto_git : 1;
 140};
 141static struct discovery *last_discovery;
 142
 143static struct ref *parse_git_refs(struct discovery *heads, int for_push)
 144{
 145        struct ref *list = NULL;
 146        get_remote_heads(-1, heads->buf, heads->len, &list,
 147                         for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
 148        return list;
 149}
 150
 151static struct ref *parse_info_refs(struct discovery *heads)
 152{
 153        char *data, *start, *mid;
 154        char *ref_name;
 155        int i = 0;
 156
 157        struct ref *refs = NULL;
 158        struct ref *ref = NULL;
 159        struct ref *last_ref = NULL;
 160
 161        data = heads->buf;
 162        start = NULL;
 163        mid = data;
 164        while (i < heads->len) {
 165                if (!start) {
 166                        start = &data[i];
 167                }
 168                if (data[i] == '\t')
 169                        mid = &data[i];
 170                if (data[i] == '\n') {
 171                        if (mid - start != 40)
 172                                die("%sinfo/refs not valid: is this a git repository?",
 173                                    url.buf);
 174                        data[i] = 0;
 175                        ref_name = mid + 1;
 176                        ref = alloc_ref(ref_name);
 177                        get_oid_hex(start, &ref->old_oid);
 178                        if (!refs)
 179                                refs = ref;
 180                        if (last_ref)
 181                                last_ref->next = ref;
 182                        last_ref = ref;
 183                        start = NULL;
 184                }
 185                i++;
 186        }
 187
 188        ref = alloc_ref("HEAD");
 189        if (!http_fetch_ref(url.buf, ref) &&
 190            !resolve_remote_symref(ref, refs)) {
 191                ref->next = refs;
 192                refs = ref;
 193        } else {
 194                free(ref);
 195        }
 196
 197        return refs;
 198}
 199
 200static void free_discovery(struct discovery *d)
 201{
 202        if (d) {
 203                if (d == last_discovery)
 204                        last_discovery = NULL;
 205                free(d->shallow.sha1);
 206                free(d->buf_alloc);
 207                free_refs(d->refs);
 208                free(d);
 209        }
 210}
 211
 212static int show_http_message(struct strbuf *type, struct strbuf *charset,
 213                             struct strbuf *msg)
 214{
 215        const char *p, *eol;
 216
 217        /*
 218         * We only show text/plain parts, as other types are likely
 219         * to be ugly to look at on the user's terminal.
 220         */
 221        if (strcmp(type->buf, "text/plain"))
 222                return -1;
 223        if (charset->len)
 224                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 225
 226        strbuf_trim(msg);
 227        if (!msg->len)
 228                return -1;
 229
 230        p = msg->buf;
 231        do {
 232                eol = strchrnul(p, '\n');
 233                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 234                p = eol + 1;
 235        } while(*eol);
 236        return 0;
 237}
 238
 239static struct discovery *discover_refs(const char *service, int for_push)
 240{
 241        struct strbuf exp = STRBUF_INIT;
 242        struct strbuf type = STRBUF_INIT;
 243        struct strbuf charset = STRBUF_INIT;
 244        struct strbuf buffer = STRBUF_INIT;
 245        struct strbuf refs_url = STRBUF_INIT;
 246        struct strbuf effective_url = STRBUF_INIT;
 247        struct discovery *last = last_discovery;
 248        int http_ret, maybe_smart = 0;
 249        struct http_get_options options;
 250
 251        if (last && !strcmp(service, last->service))
 252                return last;
 253        free_discovery(last);
 254
 255        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 256        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 257             git_env_bool("GIT_SMART_HTTP", 1)) {
 258                maybe_smart = 1;
 259                if (!strchr(url.buf, '?'))
 260                        strbuf_addch(&refs_url, '?');
 261                else
 262                        strbuf_addch(&refs_url, '&');
 263                strbuf_addf(&refs_url, "service=%s", service);
 264        }
 265
 266        memset(&options, 0, sizeof(options));
 267        options.content_type = &type;
 268        options.charset = &charset;
 269        options.effective_url = &effective_url;
 270        options.base_url = &url;
 271        options.no_cache = 1;
 272        options.keep_error = 1;
 273
 274        http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
 275        switch (http_ret) {
 276        case HTTP_OK:
 277                break;
 278        case HTTP_MISSING_TARGET:
 279                show_http_message(&type, &charset, &buffer);
 280                die("repository '%s' not found", url.buf);
 281        case HTTP_NOAUTH:
 282                show_http_message(&type, &charset, &buffer);
 283                die("Authentication failed for '%s'", url.buf);
 284        default:
 285                show_http_message(&type, &charset, &buffer);
 286                die("unable to access '%s': %s", url.buf, curl_errorstr);
 287        }
 288
 289        last= xcalloc(1, sizeof(*last_discovery));
 290        last->service = service;
 291        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 292        last->buf = last->buf_alloc;
 293
 294        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 295        if (maybe_smart &&
 296            (5 <= last->len && last->buf[4] == '#') &&
 297            !strbuf_cmp(&exp, &type)) {
 298                char *line;
 299
 300                /*
 301                 * smart HTTP response; validate that the service
 302                 * pkt-line matches our request.
 303                 */
 304                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 305
 306                strbuf_reset(&exp);
 307                strbuf_addf(&exp, "# service=%s", service);
 308                if (strcmp(line, exp.buf))
 309                        die("invalid server response; got '%s'", line);
 310                strbuf_release(&exp);
 311
 312                /* The header can include additional metadata lines, up
 313                 * until a packet flush marker.  Ignore these now, but
 314                 * in the future we might start to scan them.
 315                 */
 316                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 317                        ;
 318
 319                last->proto_git = 1;
 320        }
 321
 322        if (last->proto_git)
 323                last->refs = parse_git_refs(last, for_push);
 324        else
 325                last->refs = parse_info_refs(last);
 326
 327        strbuf_release(&refs_url);
 328        strbuf_release(&exp);
 329        strbuf_release(&type);
 330        strbuf_release(&charset);
 331        strbuf_release(&effective_url);
 332        strbuf_release(&buffer);
 333        last_discovery = last;
 334        return last;
 335}
 336
 337static struct ref *get_refs(int for_push)
 338{
 339        struct discovery *heads;
 340
 341        if (for_push)
 342                heads = discover_refs("git-receive-pack", for_push);
 343        else
 344                heads = discover_refs("git-upload-pack", for_push);
 345
 346        return heads->refs;
 347}
 348
 349static void output_refs(struct ref *refs)
 350{
 351        struct ref *posn;
 352        for (posn = refs; posn; posn = posn->next) {
 353                if (posn->symref)
 354                        printf("@%s %s\n", posn->symref, posn->name);
 355                else
 356                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 357        }
 358        printf("\n");
 359        fflush(stdout);
 360}
 361
 362struct rpc_state {
 363        const char *service_name;
 364        const char **argv;
 365        struct strbuf *stdin_preamble;
 366        char *service_url;
 367        char *hdr_content_type;
 368        char *hdr_accept;
 369        char *buf;
 370        size_t alloc;
 371        size_t len;
 372        size_t pos;
 373        int in;
 374        int out;
 375        struct strbuf result;
 376        unsigned gzip_request : 1;
 377        unsigned initial_buffer : 1;
 378};
 379
 380static size_t rpc_out(void *ptr, size_t eltsize,
 381                size_t nmemb, void *buffer_)
 382{
 383        size_t max = eltsize * nmemb;
 384        struct rpc_state *rpc = buffer_;
 385        size_t avail = rpc->len - rpc->pos;
 386
 387        if (!avail) {
 388                rpc->initial_buffer = 0;
 389                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 390                if (!avail)
 391                        return 0;
 392                rpc->pos = 0;
 393                rpc->len = avail;
 394        }
 395
 396        if (max < avail)
 397                avail = max;
 398        memcpy(ptr, rpc->buf + rpc->pos, avail);
 399        rpc->pos += avail;
 400        return avail;
 401}
 402
 403#ifndef NO_CURL_IOCTL
 404static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 405{
 406        struct rpc_state *rpc = clientp;
 407
 408        switch (cmd) {
 409        case CURLIOCMD_NOP:
 410                return CURLIOE_OK;
 411
 412        case CURLIOCMD_RESTARTREAD:
 413                if (rpc->initial_buffer) {
 414                        rpc->pos = 0;
 415                        return CURLIOE_OK;
 416                }
 417                error("unable to rewind rpc post data - try increasing http.postBuffer");
 418                return CURLIOE_FAILRESTART;
 419
 420        default:
 421                return CURLIOE_UNKNOWNCMD;
 422        }
 423}
 424#endif
 425
 426static size_t rpc_in(char *ptr, size_t eltsize,
 427                size_t nmemb, void *buffer_)
 428{
 429        size_t size = eltsize * nmemb;
 430        struct rpc_state *rpc = buffer_;
 431        write_or_die(rpc->in, ptr, size);
 432        return size;
 433}
 434
 435static int run_slot(struct active_request_slot *slot,
 436                    struct slot_results *results)
 437{
 438        int err;
 439        struct slot_results results_buf;
 440
 441        if (!results)
 442                results = &results_buf;
 443
 444        err = run_one_slot(slot, results);
 445
 446        if (err != HTTP_OK && err != HTTP_REAUTH) {
 447                error("RPC failed; result=%d, HTTP code = %ld",
 448                      results->curl_result, results->http_code);
 449        }
 450
 451        return err;
 452}
 453
 454static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 455{
 456        struct active_request_slot *slot;
 457        struct curl_slist *headers = NULL;
 458        struct strbuf buf = STRBUF_INIT;
 459        int err;
 460
 461        slot = get_active_slot();
 462
 463        headers = curl_slist_append(headers, rpc->hdr_content_type);
 464        headers = curl_slist_append(headers, rpc->hdr_accept);
 465
 466        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 467        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 468        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 469        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 470        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 471        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 472        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 473        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 474        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 475
 476        err = run_slot(slot, results);
 477
 478        curl_slist_free_all(headers);
 479        strbuf_release(&buf);
 480        return err;
 481}
 482
 483static int post_rpc(struct rpc_state *rpc)
 484{
 485        struct active_request_slot *slot;
 486        struct curl_slist *headers = NULL;
 487        int use_gzip = rpc->gzip_request;
 488        char *gzip_body = NULL;
 489        size_t gzip_size = 0;
 490        int err, large_request = 0;
 491        int needs_100_continue = 0;
 492
 493        /* Try to load the entire request, if we can fit it into the
 494         * allocated buffer space we can use HTTP/1.0 and avoid the
 495         * chunked encoding mess.
 496         */
 497        while (1) {
 498                size_t left = rpc->alloc - rpc->len;
 499                char *buf = rpc->buf + rpc->len;
 500                int n;
 501
 502                if (left < LARGE_PACKET_MAX) {
 503                        large_request = 1;
 504                        use_gzip = 0;
 505                        break;
 506                }
 507
 508                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 509                if (!n)
 510                        break;
 511                rpc->len += n;
 512        }
 513
 514        if (large_request) {
 515                struct slot_results results;
 516
 517                do {
 518                        err = probe_rpc(rpc, &results);
 519                        if (err == HTTP_REAUTH)
 520                                credential_fill(&http_auth);
 521                } while (err == HTTP_REAUTH);
 522                if (err != HTTP_OK)
 523                        return -1;
 524
 525                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 526                        needs_100_continue = 1;
 527        }
 528
 529        headers = curl_slist_append(headers, rpc->hdr_content_type);
 530        headers = curl_slist_append(headers, rpc->hdr_accept);
 531        headers = curl_slist_append(headers, needs_100_continue ?
 532                "Expect: 100-continue" : "Expect:");
 533
 534retry:
 535        slot = get_active_slot();
 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, "gzip");
 541
 542        if (large_request) {
 543                /* The request body is large and the size cannot be predicted.
 544                 * We must use chunked encoding to send it.
 545                 */
 546                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 547                rpc->initial_buffer = 1;
 548                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 549                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 550#ifndef NO_CURL_IOCTL
 551                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 552                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 553#endif
 554                if (options.verbosity > 1) {
 555                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 556                        fflush(stderr);
 557                }
 558
 559        } else if (gzip_body) {
 560                /*
 561                 * If we are looping to retry authentication, then the previous
 562                 * run will have set up the headers and gzip buffer already,
 563                 * and we just need to send it.
 564                 */
 565                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 566                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
 567
 568        } else if (use_gzip && 1024 < rpc->len) {
 569                /* The client backend isn't giving us compressed data so
 570                 * we can try to deflate it ourselves, this may save on.
 571                 * the transfer time.
 572                 */
 573                git_zstream stream;
 574                int ret;
 575
 576                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 577                gzip_size = git_deflate_bound(&stream, rpc->len);
 578                gzip_body = xmalloc(gzip_size);
 579
 580                stream.next_in = (unsigned char *)rpc->buf;
 581                stream.avail_in = rpc->len;
 582                stream.next_out = (unsigned char *)gzip_body;
 583                stream.avail_out = gzip_size;
 584
 585                ret = git_deflate(&stream, Z_FINISH);
 586                if (ret != Z_STREAM_END)
 587                        die("cannot deflate request; zlib deflate error %d", ret);
 588
 589                ret = git_deflate_end_gently(&stream);
 590                if (ret != Z_OK)
 591                        die("cannot deflate request; zlib end error %d", ret);
 592
 593                gzip_size = stream.total_out;
 594
 595                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 596                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 597                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
 598
 599                if (options.verbosity > 1) {
 600                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 601                                rpc->service_name,
 602                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 603                        fflush(stderr);
 604                }
 605        } else {
 606                /* We know the complete request size in advance, use the
 607                 * more normal Content-Length approach.
 608                 */
 609                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 610                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
 611                if (options.verbosity > 1) {
 612                        fprintf(stderr, "POST %s (%lu bytes)\n",
 613                                rpc->service_name, (unsigned long)rpc->len);
 614                        fflush(stderr);
 615                }
 616        }
 617
 618        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 619        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 620        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 621
 622        err = run_slot(slot, NULL);
 623        if (err == HTTP_REAUTH && !large_request) {
 624                credential_fill(&http_auth);
 625                goto retry;
 626        }
 627        if (err != HTTP_OK)
 628                err = -1;
 629
 630        curl_slist_free_all(headers);
 631        free(gzip_body);
 632        return err;
 633}
 634
 635static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 636{
 637        const char *svc = rpc->service_name;
 638        struct strbuf buf = STRBUF_INIT;
 639        struct strbuf *preamble = rpc->stdin_preamble;
 640        struct child_process client = CHILD_PROCESS_INIT;
 641        int err = 0;
 642
 643        client.in = -1;
 644        client.out = -1;
 645        client.git_cmd = 1;
 646        client.argv = rpc->argv;
 647        if (start_command(&client))
 648                exit(1);
 649        if (preamble)
 650                write_or_die(client.in, preamble->buf, preamble->len);
 651        if (heads)
 652                write_or_die(client.in, heads->buf, heads->len);
 653
 654        rpc->alloc = http_post_buffer;
 655        rpc->buf = xmalloc(rpc->alloc);
 656        rpc->in = client.in;
 657        rpc->out = client.out;
 658        strbuf_init(&rpc->result, 0);
 659
 660        strbuf_addf(&buf, "%s%s", url.buf, svc);
 661        rpc->service_url = strbuf_detach(&buf, NULL);
 662
 663        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 664        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 665
 666        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 667        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 668
 669        while (!err) {
 670                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 671                if (!n)
 672                        break;
 673                rpc->pos = 0;
 674                rpc->len = n;
 675                err |= post_rpc(rpc);
 676        }
 677
 678        close(client.in);
 679        client.in = -1;
 680        if (!err) {
 681                strbuf_read(&rpc->result, client.out, 0);
 682        } else {
 683                char buf[4096];
 684                for (;;)
 685                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 686                                break;
 687        }
 688
 689        close(client.out);
 690        client.out = -1;
 691
 692        err |= finish_command(&client);
 693        free(rpc->service_url);
 694        free(rpc->hdr_content_type);
 695        free(rpc->hdr_accept);
 696        free(rpc->buf);
 697        strbuf_release(&buf);
 698        return err;
 699}
 700
 701static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 702{
 703        struct walker *walker;
 704        char **targets = xmalloc(nr_heads * sizeof(char*));
 705        int ret, i;
 706
 707        if (options.depth || options.deepen_since)
 708                die("dumb http transport does not support shallow capabilities");
 709        for (i = 0; i < nr_heads; i++)
 710                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 711
 712        walker = get_http_walker(url.buf);
 713        walker->get_all = 1;
 714        walker->get_tree = 1;
 715        walker->get_history = 1;
 716        walker->get_verbosely = options.verbosity >= 3;
 717        walker->get_recover = 0;
 718        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 719        walker_free(walker);
 720
 721        for (i = 0; i < nr_heads; i++)
 722                free(targets[i]);
 723        free(targets);
 724
 725        return ret ? error("fetch failed.") : 0;
 726}
 727
 728static int fetch_git(struct discovery *heads,
 729        int nr_heads, struct ref **to_fetch)
 730{
 731        struct rpc_state rpc;
 732        struct strbuf preamble = STRBUF_INIT;
 733        int i, err;
 734        struct argv_array args = ARGV_ARRAY_INIT;
 735
 736        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 737                         "--stdin", "--lock-pack", NULL);
 738        if (options.followtags)
 739                argv_array_push(&args, "--include-tag");
 740        if (options.thin)
 741                argv_array_push(&args, "--thin");
 742        if (options.verbosity >= 3)
 743                argv_array_pushl(&args, "-v", "-v", NULL);
 744        if (options.check_self_contained_and_connected)
 745                argv_array_push(&args, "--check-self-contained-and-connected");
 746        if (options.cloning)
 747                argv_array_push(&args, "--cloning");
 748        if (options.update_shallow)
 749                argv_array_push(&args, "--update-shallow");
 750        if (!options.progress)
 751                argv_array_push(&args, "--no-progress");
 752        if (options.depth)
 753                argv_array_pushf(&args, "--depth=%lu", options.depth);
 754        if (options.deepen_since)
 755                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 756        argv_array_push(&args, url.buf);
 757
 758        for (i = 0; i < nr_heads; i++) {
 759                struct ref *ref = to_fetch[i];
 760                if (!*ref->name)
 761                        die("cannot fetch by sha1 over smart http");
 762                packet_buf_write(&preamble, "%s %s\n",
 763                                 oid_to_hex(&ref->old_oid), ref->name);
 764        }
 765        packet_buf_flush(&preamble);
 766
 767        memset(&rpc, 0, sizeof(rpc));
 768        rpc.service_name = "git-upload-pack",
 769        rpc.argv = args.argv;
 770        rpc.stdin_preamble = &preamble;
 771        rpc.gzip_request = 1;
 772
 773        err = rpc_service(&rpc, heads);
 774        if (rpc.result.len)
 775                write_or_die(1, rpc.result.buf, rpc.result.len);
 776        strbuf_release(&rpc.result);
 777        strbuf_release(&preamble);
 778        argv_array_clear(&args);
 779        return err;
 780}
 781
 782static int fetch(int nr_heads, struct ref **to_fetch)
 783{
 784        struct discovery *d = discover_refs("git-upload-pack", 0);
 785        if (d->proto_git)
 786                return fetch_git(d, nr_heads, to_fetch);
 787        else
 788                return fetch_dumb(nr_heads, to_fetch);
 789}
 790
 791static void parse_fetch(struct strbuf *buf)
 792{
 793        struct ref **to_fetch = NULL;
 794        struct ref *list_head = NULL;
 795        struct ref **list = &list_head;
 796        int alloc_heads = 0, nr_heads = 0;
 797
 798        do {
 799                const char *p;
 800                if (skip_prefix(buf->buf, "fetch ", &p)) {
 801                        const char *name;
 802                        struct ref *ref;
 803                        struct object_id old_oid;
 804
 805                        if (get_oid_hex(p, &old_oid))
 806                                die("protocol error: expected sha/ref, got %s'", p);
 807                        if (p[GIT_SHA1_HEXSZ] == ' ')
 808                                name = p + GIT_SHA1_HEXSZ + 1;
 809                        else if (!p[GIT_SHA1_HEXSZ])
 810                                name = "";
 811                        else
 812                                die("protocol error: expected sha/ref, got %s'", p);
 813
 814                        ref = alloc_ref(name);
 815                        oidcpy(&ref->old_oid, &old_oid);
 816
 817                        *list = ref;
 818                        list = &ref->next;
 819
 820                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 821                        to_fetch[nr_heads++] = ref;
 822                }
 823                else
 824                        die("http transport does not support %s", buf->buf);
 825
 826                strbuf_reset(buf);
 827                if (strbuf_getline_lf(buf, stdin) == EOF)
 828                        return;
 829                if (!*buf->buf)
 830                        break;
 831        } while (1);
 832
 833        if (fetch(nr_heads, to_fetch))
 834                exit(128); /* error already reported */
 835        free_refs(list_head);
 836        free(to_fetch);
 837
 838        printf("\n");
 839        fflush(stdout);
 840        strbuf_reset(buf);
 841}
 842
 843static int push_dav(int nr_spec, char **specs)
 844{
 845        const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
 846        int argc = 0, i;
 847
 848        argv[argc++] = "http-push";
 849        argv[argc++] = "--helper-status";
 850        if (options.dry_run)
 851                argv[argc++] = "--dry-run";
 852        if (options.verbosity > 1)
 853                argv[argc++] = "--verbose";
 854        argv[argc++] = url.buf;
 855        for (i = 0; i < nr_spec; i++)
 856                argv[argc++] = specs[i];
 857        argv[argc++] = NULL;
 858
 859        if (run_command_v_opt(argv, RUN_GIT_CMD))
 860                die("git-%s failed", argv[0]);
 861        free(argv);
 862        return 0;
 863}
 864
 865static int push_git(struct discovery *heads, int nr_spec, char **specs)
 866{
 867        struct rpc_state rpc;
 868        int i, err;
 869        struct argv_array args;
 870        struct string_list_item *cas_option;
 871        struct strbuf preamble = STRBUF_INIT;
 872
 873        argv_array_init(&args);
 874        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 875                         NULL);
 876
 877        if (options.thin)
 878                argv_array_push(&args, "--thin");
 879        if (options.dry_run)
 880                argv_array_push(&args, "--dry-run");
 881        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 882                argv_array_push(&args, "--signed=yes");
 883        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 884                argv_array_push(&args, "--signed=if-asked");
 885        if (options.verbosity == 0)
 886                argv_array_push(&args, "--quiet");
 887        else if (options.verbosity > 1)
 888                argv_array_push(&args, "--verbose");
 889        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 890        for_each_string_list_item(cas_option, &cas_options)
 891                argv_array_push(&args, cas_option->string);
 892        argv_array_push(&args, url.buf);
 893
 894        argv_array_push(&args, "--stdin");
 895        for (i = 0; i < nr_spec; i++)
 896                packet_buf_write(&preamble, "%s\n", specs[i]);
 897        packet_buf_flush(&preamble);
 898
 899        memset(&rpc, 0, sizeof(rpc));
 900        rpc.service_name = "git-receive-pack",
 901        rpc.argv = args.argv;
 902        rpc.stdin_preamble = &preamble;
 903
 904        err = rpc_service(&rpc, heads);
 905        if (rpc.result.len)
 906                write_or_die(1, rpc.result.buf, rpc.result.len);
 907        strbuf_release(&rpc.result);
 908        strbuf_release(&preamble);
 909        argv_array_clear(&args);
 910        return err;
 911}
 912
 913static int push(int nr_spec, char **specs)
 914{
 915        struct discovery *heads = discover_refs("git-receive-pack", 1);
 916        int ret;
 917
 918        if (heads->proto_git)
 919                ret = push_git(heads, nr_spec, specs);
 920        else
 921                ret = push_dav(nr_spec, specs);
 922        free_discovery(heads);
 923        return ret;
 924}
 925
 926static void parse_push(struct strbuf *buf)
 927{
 928        char **specs = NULL;
 929        int alloc_spec = 0, nr_spec = 0, i, ret;
 930
 931        do {
 932                if (starts_with(buf->buf, "push ")) {
 933                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
 934                        specs[nr_spec++] = xstrdup(buf->buf + 5);
 935                }
 936                else
 937                        die("http transport does not support %s", buf->buf);
 938
 939                strbuf_reset(buf);
 940                if (strbuf_getline_lf(buf, stdin) == EOF)
 941                        goto free_specs;
 942                if (!*buf->buf)
 943                        break;
 944        } while (1);
 945
 946        ret = push(nr_spec, specs);
 947        printf("\n");
 948        fflush(stdout);
 949
 950        if (ret)
 951                exit(128); /* error already reported */
 952
 953 free_specs:
 954        for (i = 0; i < nr_spec; i++)
 955                free(specs[i]);
 956        free(specs);
 957}
 958
 959int main(int argc, const char **argv)
 960{
 961        struct strbuf buf = STRBUF_INIT;
 962        int nongit;
 963
 964        git_setup_gettext();
 965
 966        git_extract_argv0_path(argv[0]);
 967        setup_git_directory_gently(&nongit);
 968        if (argc < 2) {
 969                error("remote-curl: usage: git remote-curl <remote> [<url>]");
 970                return 1;
 971        }
 972
 973        options.verbosity = 1;
 974        options.progress = !!isatty(2);
 975        options.thin = 1;
 976
 977        remote = remote_get(argv[1]);
 978
 979        if (argc > 2) {
 980                end_url_with_slash(&url, argv[2]);
 981        } else {
 982                end_url_with_slash(&url, remote->url[0]);
 983        }
 984
 985        http_init(remote, url.buf, 0);
 986
 987        do {
 988                const char *arg;
 989
 990                if (strbuf_getline_lf(&buf, stdin) == EOF) {
 991                        if (ferror(stdin))
 992                                error("remote-curl: error reading command stream from git");
 993                        return 1;
 994                }
 995                if (buf.len == 0)
 996                        break;
 997                if (starts_with(buf.buf, "fetch ")) {
 998                        if (nongit)
 999                                die("remote-curl: fetch attempted without a local repo");
1000                        parse_fetch(&buf);
1001
1002                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1003                        int for_push = !!strstr(buf.buf + 4, "for-push");
1004                        output_refs(get_refs(for_push));
1005
1006                } else if (starts_with(buf.buf, "push ")) {
1007                        parse_push(&buf);
1008
1009                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1010                        char *value = strchr(arg, ' ');
1011                        int result;
1012
1013                        if (value)
1014                                *value++ = '\0';
1015                        else
1016                                value = "true";
1017
1018                        result = set_option(arg, value);
1019                        if (!result)
1020                                printf("ok\n");
1021                        else if (result < 0)
1022                                printf("error invalid value\n");
1023                        else
1024                                printf("unsupported\n");
1025                        fflush(stdout);
1026
1027                } else if (!strcmp(buf.buf, "capabilities")) {
1028                        printf("fetch\n");
1029                        printf("option\n");
1030                        printf("push\n");
1031                        printf("check-connectivity\n");
1032                        printf("\n");
1033                        fflush(stdout);
1034                } else {
1035                        error("remote-curl: unknown command '%s' from git", buf.buf);
1036                        return 1;
1037                }
1038                strbuf_reset(&buf);
1039        } while (1);
1040
1041        http_cleanup();
1042
1043        return 0;
1044}