Andrew's git / gitweb.git / remote-curl.c
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remote-curl.con commit gc: do not repack promisor packfiles (0c16cd4)
   1#include "cache.h"
   2#include "config.h"
   3#include "remote.h"
   4#include "strbuf.h"
   5#include "walker.h"
   6#include "http.h"
   7#include "exec_cmd.h"
   8#include "run-command.h"
   9#include "pkt-line.h"
  10#include "string-list.h"
  11#include "sideband.h"
  12#include "argv-array.h"
  13#include "credential.h"
  14#include "sha1-array.h"
  15#include "send-pack.h"
  16
  17static struct remote *remote;
  18/* always ends with a trailing slash */
  19static struct strbuf url = STRBUF_INIT;
  20
  21struct options {
  22        int verbosity;
  23        unsigned long depth;
  24        char *deepen_since;
  25        struct string_list deepen_not;
  26        struct string_list push_options;
  27        unsigned progress : 1,
  28                check_self_contained_and_connected : 1,
  29                cloning : 1,
  30                update_shallow : 1,
  31                followtags : 1,
  32                dry_run : 1,
  33                thin : 1,
  34                /* One of the SEND_PACK_PUSH_CERT_* constants. */
  35                push_cert : 2,
  36                deepen_relative : 1,
  37                from_promisor : 1,
  38                no_dependents : 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 if (!strcmp(name, "from-promisor")) {
 163                options.from_promisor = 1;
 164                return 0;
 165        } else if (!strcmp(name, "no-dependents")) {
 166                options.no_dependents = 1;
 167                return 0;
 168        } else {
 169                return 1 /* unsupported */;
 170        }
 171}
 172
 173struct discovery {
 174        const char *service;
 175        char *buf_alloc;
 176        char *buf;
 177        size_t len;
 178        struct ref *refs;
 179        struct oid_array shallow;
 180        unsigned proto_git : 1;
 181};
 182static struct discovery *last_discovery;
 183
 184static struct ref *parse_git_refs(struct discovery *heads, int for_push)
 185{
 186        struct ref *list = NULL;
 187        get_remote_heads(-1, heads->buf, heads->len, &list,
 188                         for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
 189        return list;
 190}
 191
 192static struct ref *parse_info_refs(struct discovery *heads)
 193{
 194        char *data, *start, *mid;
 195        char *ref_name;
 196        int i = 0;
 197
 198        struct ref *refs = NULL;
 199        struct ref *ref = NULL;
 200        struct ref *last_ref = NULL;
 201
 202        data = heads->buf;
 203        start = NULL;
 204        mid = data;
 205        while (i < heads->len) {
 206                if (!start) {
 207                        start = &data[i];
 208                }
 209                if (data[i] == '\t')
 210                        mid = &data[i];
 211                if (data[i] == '\n') {
 212                        if (mid - start != 40)
 213                                die("%sinfo/refs not valid: is this a git repository?",
 214                                    url.buf);
 215                        data[i] = 0;
 216                        ref_name = mid + 1;
 217                        ref = alloc_ref(ref_name);
 218                        get_oid_hex(start, &ref->old_oid);
 219                        if (!refs)
 220                                refs = ref;
 221                        if (last_ref)
 222                                last_ref->next = ref;
 223                        last_ref = ref;
 224                        start = NULL;
 225                }
 226                i++;
 227        }
 228
 229        ref = alloc_ref("HEAD");
 230        if (!http_fetch_ref(url.buf, ref) &&
 231            !resolve_remote_symref(ref, refs)) {
 232                ref->next = refs;
 233                refs = ref;
 234        } else {
 235                free(ref);
 236        }
 237
 238        return refs;
 239}
 240
 241static void free_discovery(struct discovery *d)
 242{
 243        if (d) {
 244                if (d == last_discovery)
 245                        last_discovery = NULL;
 246                free(d->shallow.oid);
 247                free(d->buf_alloc);
 248                free_refs(d->refs);
 249                free(d);
 250        }
 251}
 252
 253static int show_http_message(struct strbuf *type, struct strbuf *charset,
 254                             struct strbuf *msg)
 255{
 256        const char *p, *eol;
 257
 258        /*
 259         * We only show text/plain parts, as other types are likely
 260         * to be ugly to look at on the user's terminal.
 261         */
 262        if (strcmp(type->buf, "text/plain"))
 263                return -1;
 264        if (charset->len)
 265                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 266
 267        strbuf_trim(msg);
 268        if (!msg->len)
 269                return -1;
 270
 271        p = msg->buf;
 272        do {
 273                eol = strchrnul(p, '\n');
 274                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 275                p = eol + 1;
 276        } while(*eol);
 277        return 0;
 278}
 279
 280static struct discovery *discover_refs(const char *service, int for_push)
 281{
 282        struct strbuf exp = STRBUF_INIT;
 283        struct strbuf type = STRBUF_INIT;
 284        struct strbuf charset = STRBUF_INIT;
 285        struct strbuf buffer = STRBUF_INIT;
 286        struct strbuf refs_url = STRBUF_INIT;
 287        struct strbuf effective_url = STRBUF_INIT;
 288        struct discovery *last = last_discovery;
 289        int http_ret, maybe_smart = 0;
 290        struct http_get_options http_options;
 291
 292        if (last && !strcmp(service, last->service))
 293                return last;
 294        free_discovery(last);
 295
 296        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 297        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 298             git_env_bool("GIT_SMART_HTTP", 1)) {
 299                maybe_smart = 1;
 300                if (!strchr(url.buf, '?'))
 301                        strbuf_addch(&refs_url, '?');
 302                else
 303                        strbuf_addch(&refs_url, '&');
 304                strbuf_addf(&refs_url, "service=%s", service);
 305        }
 306
 307        memset(&http_options, 0, sizeof(http_options));
 308        http_options.content_type = &type;
 309        http_options.charset = &charset;
 310        http_options.effective_url = &effective_url;
 311        http_options.base_url = &url;
 312        http_options.initial_request = 1;
 313        http_options.no_cache = 1;
 314        http_options.keep_error = 1;
 315
 316        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 317        switch (http_ret) {
 318        case HTTP_OK:
 319                break;
 320        case HTTP_MISSING_TARGET:
 321                show_http_message(&type, &charset, &buffer);
 322                die("repository '%s' not found", url.buf);
 323        case HTTP_NOAUTH:
 324                show_http_message(&type, &charset, &buffer);
 325                die("Authentication failed for '%s'", url.buf);
 326        default:
 327                show_http_message(&type, &charset, &buffer);
 328                die("unable to access '%s': %s", url.buf, curl_errorstr);
 329        }
 330
 331        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 332                warning(_("redirecting to %s"), url.buf);
 333
 334        last= xcalloc(1, sizeof(*last_discovery));
 335        last->service = service;
 336        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 337        last->buf = last->buf_alloc;
 338
 339        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 340        if (maybe_smart &&
 341            (5 <= last->len && last->buf[4] == '#') &&
 342            !strbuf_cmp(&exp, &type)) {
 343                char *line;
 344
 345                /*
 346                 * smart HTTP response; validate that the service
 347                 * pkt-line matches our request.
 348                 */
 349                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 350
 351                strbuf_reset(&exp);
 352                strbuf_addf(&exp, "# service=%s", service);
 353                if (strcmp(line, exp.buf))
 354                        die("invalid server response; got '%s'", line);
 355                strbuf_release(&exp);
 356
 357                /* The header can include additional metadata lines, up
 358                 * until a packet flush marker.  Ignore these now, but
 359                 * in the future we might start to scan them.
 360                 */
 361                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 362                        ;
 363
 364                last->proto_git = 1;
 365        }
 366
 367        if (last->proto_git)
 368                last->refs = parse_git_refs(last, for_push);
 369        else
 370                last->refs = parse_info_refs(last);
 371
 372        strbuf_release(&refs_url);
 373        strbuf_release(&exp);
 374        strbuf_release(&type);
 375        strbuf_release(&charset);
 376        strbuf_release(&effective_url);
 377        strbuf_release(&buffer);
 378        last_discovery = last;
 379        return last;
 380}
 381
 382static struct ref *get_refs(int for_push)
 383{
 384        struct discovery *heads;
 385
 386        if (for_push)
 387                heads = discover_refs("git-receive-pack", for_push);
 388        else
 389                heads = discover_refs("git-upload-pack", for_push);
 390
 391        return heads->refs;
 392}
 393
 394static void output_refs(struct ref *refs)
 395{
 396        struct ref *posn;
 397        for (posn = refs; posn; posn = posn->next) {
 398                if (posn->symref)
 399                        printf("@%s %s\n", posn->symref, posn->name);
 400                else
 401                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 402        }
 403        printf("\n");
 404        fflush(stdout);
 405}
 406
 407struct rpc_state {
 408        const char *service_name;
 409        const char **argv;
 410        struct strbuf *stdin_preamble;
 411        char *service_url;
 412        char *hdr_content_type;
 413        char *hdr_accept;
 414        char *buf;
 415        size_t alloc;
 416        size_t len;
 417        size_t pos;
 418        int in;
 419        int out;
 420        int any_written;
 421        struct strbuf result;
 422        unsigned gzip_request : 1;
 423        unsigned initial_buffer : 1;
 424};
 425
 426static size_t rpc_out(void *ptr, size_t eltsize,
 427                size_t nmemb, void *buffer_)
 428{
 429        size_t max = eltsize * nmemb;
 430        struct rpc_state *rpc = buffer_;
 431        size_t avail = rpc->len - rpc->pos;
 432
 433        if (!avail) {
 434                rpc->initial_buffer = 0;
 435                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 436                if (!avail)
 437                        return 0;
 438                rpc->pos = 0;
 439                rpc->len = avail;
 440        }
 441
 442        if (max < avail)
 443                avail = max;
 444        memcpy(ptr, rpc->buf + rpc->pos, avail);
 445        rpc->pos += avail;
 446        return avail;
 447}
 448
 449#ifndef NO_CURL_IOCTL
 450static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 451{
 452        struct rpc_state *rpc = clientp;
 453
 454        switch (cmd) {
 455        case CURLIOCMD_NOP:
 456                return CURLIOE_OK;
 457
 458        case CURLIOCMD_RESTARTREAD:
 459                if (rpc->initial_buffer) {
 460                        rpc->pos = 0;
 461                        return CURLIOE_OK;
 462                }
 463                error("unable to rewind rpc post data - try increasing http.postBuffer");
 464                return CURLIOE_FAILRESTART;
 465
 466        default:
 467                return CURLIOE_UNKNOWNCMD;
 468        }
 469}
 470#endif
 471
 472static size_t rpc_in(char *ptr, size_t eltsize,
 473                size_t nmemb, void *buffer_)
 474{
 475        size_t size = eltsize * nmemb;
 476        struct rpc_state *rpc = buffer_;
 477        if (size)
 478                rpc->any_written = 1;
 479        write_or_die(rpc->in, ptr, size);
 480        return size;
 481}
 482
 483static int run_slot(struct active_request_slot *slot,
 484                    struct slot_results *results)
 485{
 486        int err;
 487        struct slot_results results_buf;
 488
 489        if (!results)
 490                results = &results_buf;
 491
 492        err = run_one_slot(slot, results);
 493
 494        if (err != HTTP_OK && err != HTTP_REAUTH) {
 495                struct strbuf msg = STRBUF_INIT;
 496                if (results->http_code && results->http_code != 200)
 497                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 498                if (results->curl_result != CURLE_OK) {
 499                        if (msg.len)
 500                                strbuf_addch(&msg, ' ');
 501                        strbuf_addf(&msg, "curl %d", results->curl_result);
 502                        if (curl_errorstr[0]) {
 503                                strbuf_addch(&msg, ' ');
 504                                strbuf_addstr(&msg, curl_errorstr);
 505                        }
 506                }
 507                error("RPC failed; %s", msg.buf);
 508                strbuf_release(&msg);
 509        }
 510
 511        return err;
 512}
 513
 514static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 515{
 516        struct active_request_slot *slot;
 517        struct curl_slist *headers = http_copy_default_headers();
 518        struct strbuf buf = STRBUF_INIT;
 519        int err;
 520
 521        slot = get_active_slot();
 522
 523        headers = curl_slist_append(headers, rpc->hdr_content_type);
 524        headers = curl_slist_append(headers, rpc->hdr_accept);
 525
 526        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 527        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 528        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 529        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 530        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 531        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 532        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 533        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 534        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 535
 536        err = run_slot(slot, results);
 537
 538        curl_slist_free_all(headers);
 539        strbuf_release(&buf);
 540        return err;
 541}
 542
 543static curl_off_t xcurl_off_t(ssize_t len) {
 544        if (len > maximum_signed_value_of_type(curl_off_t))
 545                die("cannot handle pushes this big");
 546        return (curl_off_t) len;
 547}
 548
 549static int post_rpc(struct rpc_state *rpc)
 550{
 551        struct active_request_slot *slot;
 552        struct curl_slist *headers = http_copy_default_headers();
 553        int use_gzip = rpc->gzip_request;
 554        char *gzip_body = NULL;
 555        size_t gzip_size = 0;
 556        int err, large_request = 0;
 557        int needs_100_continue = 0;
 558
 559        /* Try to load the entire request, if we can fit it into the
 560         * allocated buffer space we can use HTTP/1.0 and avoid the
 561         * chunked encoding mess.
 562         */
 563        while (1) {
 564                size_t left = rpc->alloc - rpc->len;
 565                char *buf = rpc->buf + rpc->len;
 566                int n;
 567
 568                if (left < LARGE_PACKET_MAX) {
 569                        large_request = 1;
 570                        use_gzip = 0;
 571                        break;
 572                }
 573
 574                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 575                if (!n)
 576                        break;
 577                rpc->len += n;
 578        }
 579
 580        if (large_request) {
 581                struct slot_results results;
 582
 583                do {
 584                        err = probe_rpc(rpc, &results);
 585                        if (err == HTTP_REAUTH)
 586                                credential_fill(&http_auth);
 587                } while (err == HTTP_REAUTH);
 588                if (err != HTTP_OK)
 589                        return -1;
 590
 591                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 592                        needs_100_continue = 1;
 593        }
 594
 595        headers = curl_slist_append(headers, rpc->hdr_content_type);
 596        headers = curl_slist_append(headers, rpc->hdr_accept);
 597        headers = curl_slist_append(headers, needs_100_continue ?
 598                "Expect: 100-continue" : "Expect:");
 599
 600retry:
 601        slot = get_active_slot();
 602
 603        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 604        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 605        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 606        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 607
 608        if (large_request) {
 609                /* The request body is large and the size cannot be predicted.
 610                 * We must use chunked encoding to send it.
 611                 */
 612                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 613                rpc->initial_buffer = 1;
 614                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 615                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 616#ifndef NO_CURL_IOCTL
 617                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 618                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 619#endif
 620                if (options.verbosity > 1) {
 621                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 622                        fflush(stderr);
 623                }
 624
 625        } else if (gzip_body) {
 626                /*
 627                 * If we are looping to retry authentication, then the previous
 628                 * run will have set up the headers and gzip buffer already,
 629                 * and we just need to send it.
 630                 */
 631                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 632                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 633
 634        } else if (use_gzip && 1024 < rpc->len) {
 635                /* The client backend isn't giving us compressed data so
 636                 * we can try to deflate it ourselves, this may save on.
 637                 * the transfer time.
 638                 */
 639                git_zstream stream;
 640                int ret;
 641
 642                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 643                gzip_size = git_deflate_bound(&stream, rpc->len);
 644                gzip_body = xmalloc(gzip_size);
 645
 646                stream.next_in = (unsigned char *)rpc->buf;
 647                stream.avail_in = rpc->len;
 648                stream.next_out = (unsigned char *)gzip_body;
 649                stream.avail_out = gzip_size;
 650
 651                ret = git_deflate(&stream, Z_FINISH);
 652                if (ret != Z_STREAM_END)
 653                        die("cannot deflate request; zlib deflate error %d", ret);
 654
 655                ret = git_deflate_end_gently(&stream);
 656                if (ret != Z_OK)
 657                        die("cannot deflate request; zlib end error %d", ret);
 658
 659                gzip_size = stream.total_out;
 660
 661                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 662                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 663                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 664
 665                if (options.verbosity > 1) {
 666                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 667                                rpc->service_name,
 668                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 669                        fflush(stderr);
 670                }
 671        } else {
 672                /* We know the complete request size in advance, use the
 673                 * more normal Content-Length approach.
 674                 */
 675                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 676                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 677                if (options.verbosity > 1) {
 678                        fprintf(stderr, "POST %s (%lu bytes)\n",
 679                                rpc->service_name, (unsigned long)rpc->len);
 680                        fflush(stderr);
 681                }
 682        }
 683
 684        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 685        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 686        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 687
 688
 689        rpc->any_written = 0;
 690        err = run_slot(slot, NULL);
 691        if (err == HTTP_REAUTH && !large_request) {
 692                credential_fill(&http_auth);
 693                goto retry;
 694        }
 695        if (err != HTTP_OK)
 696                err = -1;
 697
 698        if (!rpc->any_written)
 699                err = -1;
 700
 701        curl_slist_free_all(headers);
 702        free(gzip_body);
 703        return err;
 704}
 705
 706static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 707{
 708        const char *svc = rpc->service_name;
 709        struct strbuf buf = STRBUF_INIT;
 710        struct strbuf *preamble = rpc->stdin_preamble;
 711        struct child_process client = CHILD_PROCESS_INIT;
 712        int err = 0;
 713
 714        client.in = -1;
 715        client.out = -1;
 716        client.git_cmd = 1;
 717        client.argv = rpc->argv;
 718        if (start_command(&client))
 719                exit(1);
 720        if (preamble)
 721                write_or_die(client.in, preamble->buf, preamble->len);
 722        if (heads)
 723                write_or_die(client.in, heads->buf, heads->len);
 724
 725        rpc->alloc = http_post_buffer;
 726        rpc->buf = xmalloc(rpc->alloc);
 727        rpc->in = client.in;
 728        rpc->out = client.out;
 729        strbuf_init(&rpc->result, 0);
 730
 731        strbuf_addf(&buf, "%s%s", url.buf, svc);
 732        rpc->service_url = strbuf_detach(&buf, NULL);
 733
 734        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 735        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 736
 737        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 738        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 739
 740        while (!err) {
 741                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 742                if (!n)
 743                        break;
 744                rpc->pos = 0;
 745                rpc->len = n;
 746                err |= post_rpc(rpc);
 747        }
 748
 749        close(client.in);
 750        client.in = -1;
 751        if (!err) {
 752                strbuf_read(&rpc->result, client.out, 0);
 753        } else {
 754                char buf[4096];
 755                for (;;)
 756                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 757                                break;
 758        }
 759
 760        close(client.out);
 761        client.out = -1;
 762
 763        err |= finish_command(&client);
 764        free(rpc->service_url);
 765        free(rpc->hdr_content_type);
 766        free(rpc->hdr_accept);
 767        free(rpc->buf);
 768        strbuf_release(&buf);
 769        return err;
 770}
 771
 772static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 773{
 774        struct walker *walker;
 775        char **targets;
 776        int ret, i;
 777
 778        ALLOC_ARRAY(targets, nr_heads);
 779        if (options.depth || options.deepen_since)
 780                die("dumb http transport does not support shallow capabilities");
 781        for (i = 0; i < nr_heads; i++)
 782                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 783
 784        walker = get_http_walker(url.buf);
 785        walker->get_all = 1;
 786        walker->get_tree = 1;
 787        walker->get_history = 1;
 788        walker->get_verbosely = options.verbosity >= 3;
 789        walker->get_recover = 0;
 790        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 791        walker_free(walker);
 792
 793        for (i = 0; i < nr_heads; i++)
 794                free(targets[i]);
 795        free(targets);
 796
 797        return ret ? error("fetch failed.") : 0;
 798}
 799
 800static int fetch_git(struct discovery *heads,
 801        int nr_heads, struct ref **to_fetch)
 802{
 803        struct rpc_state rpc;
 804        struct strbuf preamble = STRBUF_INIT;
 805        int i, err;
 806        struct argv_array args = ARGV_ARRAY_INIT;
 807
 808        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 809                         "--stdin", "--lock-pack", NULL);
 810        if (options.followtags)
 811                argv_array_push(&args, "--include-tag");
 812        if (options.thin)
 813                argv_array_push(&args, "--thin");
 814        if (options.verbosity >= 3)
 815                argv_array_pushl(&args, "-v", "-v", NULL);
 816        if (options.check_self_contained_and_connected)
 817                argv_array_push(&args, "--check-self-contained-and-connected");
 818        if (options.cloning)
 819                argv_array_push(&args, "--cloning");
 820        if (options.update_shallow)
 821                argv_array_push(&args, "--update-shallow");
 822        if (!options.progress)
 823                argv_array_push(&args, "--no-progress");
 824        if (options.depth)
 825                argv_array_pushf(&args, "--depth=%lu", options.depth);
 826        if (options.deepen_since)
 827                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 828        for (i = 0; i < options.deepen_not.nr; i++)
 829                argv_array_pushf(&args, "--shallow-exclude=%s",
 830                                 options.deepen_not.items[i].string);
 831        if (options.deepen_relative && options.depth)
 832                argv_array_push(&args, "--deepen-relative");
 833        if (options.from_promisor)
 834                argv_array_push(&args, "--from-promisor");
 835        if (options.no_dependents)
 836                argv_array_push(&args, "--no-dependents");
 837        argv_array_push(&args, url.buf);
 838
 839        for (i = 0; i < nr_heads; i++) {
 840                struct ref *ref = to_fetch[i];
 841                if (!*ref->name)
 842                        die("cannot fetch by sha1 over smart http");
 843                packet_buf_write(&preamble, "%s %s\n",
 844                                 oid_to_hex(&ref->old_oid), ref->name);
 845        }
 846        packet_buf_flush(&preamble);
 847
 848        memset(&rpc, 0, sizeof(rpc));
 849        rpc.service_name = "git-upload-pack",
 850        rpc.argv = args.argv;
 851        rpc.stdin_preamble = &preamble;
 852        rpc.gzip_request = 1;
 853
 854        err = rpc_service(&rpc, heads);
 855        if (rpc.result.len)
 856                write_or_die(1, rpc.result.buf, rpc.result.len);
 857        strbuf_release(&rpc.result);
 858        strbuf_release(&preamble);
 859        argv_array_clear(&args);
 860        return err;
 861}
 862
 863static int fetch(int nr_heads, struct ref **to_fetch)
 864{
 865        struct discovery *d = discover_refs("git-upload-pack", 0);
 866        if (d->proto_git)
 867                return fetch_git(d, nr_heads, to_fetch);
 868        else
 869                return fetch_dumb(nr_heads, to_fetch);
 870}
 871
 872static void parse_fetch(struct strbuf *buf)
 873{
 874        struct ref **to_fetch = NULL;
 875        struct ref *list_head = NULL;
 876        struct ref **list = &list_head;
 877        int alloc_heads = 0, nr_heads = 0;
 878
 879        do {
 880                const char *p;
 881                if (skip_prefix(buf->buf, "fetch ", &p)) {
 882                        const char *name;
 883                        struct ref *ref;
 884                        struct object_id old_oid;
 885
 886                        if (get_oid_hex(p, &old_oid))
 887                                die("protocol error: expected sha/ref, got %s'", p);
 888                        if (p[GIT_SHA1_HEXSZ] == ' ')
 889                                name = p + GIT_SHA1_HEXSZ + 1;
 890                        else if (!p[GIT_SHA1_HEXSZ])
 891                                name = "";
 892                        else
 893                                die("protocol error: expected sha/ref, got %s'", p);
 894
 895                        ref = alloc_ref(name);
 896                        oidcpy(&ref->old_oid, &old_oid);
 897
 898                        *list = ref;
 899                        list = &ref->next;
 900
 901                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 902                        to_fetch[nr_heads++] = ref;
 903                }
 904                else
 905                        die("http transport does not support %s", buf->buf);
 906
 907                strbuf_reset(buf);
 908                if (strbuf_getline_lf(buf, stdin) == EOF)
 909                        return;
 910                if (!*buf->buf)
 911                        break;
 912        } while (1);
 913
 914        if (fetch(nr_heads, to_fetch))
 915                exit(128); /* error already reported */
 916        free_refs(list_head);
 917        free(to_fetch);
 918
 919        printf("\n");
 920        fflush(stdout);
 921        strbuf_reset(buf);
 922}
 923
 924static int push_dav(int nr_spec, char **specs)
 925{
 926        struct child_process child = CHILD_PROCESS_INIT;
 927        size_t i;
 928
 929        child.git_cmd = 1;
 930        argv_array_push(&child.args, "http-push");
 931        argv_array_push(&child.args, "--helper-status");
 932        if (options.dry_run)
 933                argv_array_push(&child.args, "--dry-run");
 934        if (options.verbosity > 1)
 935                argv_array_push(&child.args, "--verbose");
 936        argv_array_push(&child.args, url.buf);
 937        for (i = 0; i < nr_spec; i++)
 938                argv_array_push(&child.args, specs[i]);
 939
 940        if (run_command(&child))
 941                die("git-http-push failed");
 942        return 0;
 943}
 944
 945static int push_git(struct discovery *heads, int nr_spec, char **specs)
 946{
 947        struct rpc_state rpc;
 948        int i, err;
 949        struct argv_array args;
 950        struct string_list_item *cas_option;
 951        struct strbuf preamble = STRBUF_INIT;
 952
 953        argv_array_init(&args);
 954        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 955                         NULL);
 956
 957        if (options.thin)
 958                argv_array_push(&args, "--thin");
 959        if (options.dry_run)
 960                argv_array_push(&args, "--dry-run");
 961        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 962                argv_array_push(&args, "--signed=yes");
 963        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 964                argv_array_push(&args, "--signed=if-asked");
 965        if (options.verbosity == 0)
 966                argv_array_push(&args, "--quiet");
 967        else if (options.verbosity > 1)
 968                argv_array_push(&args, "--verbose");
 969        for (i = 0; i < options.push_options.nr; i++)
 970                argv_array_pushf(&args, "--push-option=%s",
 971                                 options.push_options.items[i].string);
 972        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 973        for_each_string_list_item(cas_option, &cas_options)
 974                argv_array_push(&args, cas_option->string);
 975        argv_array_push(&args, url.buf);
 976
 977        argv_array_push(&args, "--stdin");
 978        for (i = 0; i < nr_spec; i++)
 979                packet_buf_write(&preamble, "%s\n", specs[i]);
 980        packet_buf_flush(&preamble);
 981
 982        memset(&rpc, 0, sizeof(rpc));
 983        rpc.service_name = "git-receive-pack",
 984        rpc.argv = args.argv;
 985        rpc.stdin_preamble = &preamble;
 986
 987        err = rpc_service(&rpc, heads);
 988        if (rpc.result.len)
 989                write_or_die(1, rpc.result.buf, rpc.result.len);
 990        strbuf_release(&rpc.result);
 991        strbuf_release(&preamble);
 992        argv_array_clear(&args);
 993        return err;
 994}
 995
 996static int push(int nr_spec, char **specs)
 997{
 998        struct discovery *heads = discover_refs("git-receive-pack", 1);
 999        int ret;
1000
1001        if (heads->proto_git)
1002                ret = push_git(heads, nr_spec, specs);
1003        else
1004                ret = push_dav(nr_spec, specs);
1005        free_discovery(heads);
1006        return ret;
1007}
1008
1009static void parse_push(struct strbuf *buf)
1010{
1011        char **specs = NULL;
1012        int alloc_spec = 0, nr_spec = 0, i, ret;
1013
1014        do {
1015                if (starts_with(buf->buf, "push ")) {
1016                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1017                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1018                }
1019                else
1020                        die("http transport does not support %s", buf->buf);
1021
1022                strbuf_reset(buf);
1023                if (strbuf_getline_lf(buf, stdin) == EOF)
1024                        goto free_specs;
1025                if (!*buf->buf)
1026                        break;
1027        } while (1);
1028
1029        ret = push(nr_spec, specs);
1030        printf("\n");
1031        fflush(stdout);
1032
1033        if (ret)
1034                exit(128); /* error already reported */
1035
1036 free_specs:
1037        for (i = 0; i < nr_spec; i++)
1038                free(specs[i]);
1039        free(specs);
1040}
1041
1042int cmd_main(int argc, const char **argv)
1043{
1044        struct strbuf buf = STRBUF_INIT;
1045        int nongit;
1046
1047        setup_git_directory_gently(&nongit);
1048        if (argc < 2) {
1049                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1050                return 1;
1051        }
1052
1053        options.verbosity = 1;
1054        options.progress = !!isatty(2);
1055        options.thin = 1;
1056        string_list_init(&options.deepen_not, 1);
1057        string_list_init(&options.push_options, 1);
1058
1059        remote = remote_get(argv[1]);
1060
1061        if (argc > 2) {
1062                end_url_with_slash(&url, argv[2]);
1063        } else {
1064                end_url_with_slash(&url, remote->url[0]);
1065        }
1066
1067        http_init(remote, url.buf, 0);
1068
1069        do {
1070                const char *arg;
1071
1072                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1073                        if (ferror(stdin))
1074                                error("remote-curl: error reading command stream from git");
1075                        return 1;
1076                }
1077                if (buf.len == 0)
1078                        break;
1079                if (starts_with(buf.buf, "fetch ")) {
1080                        if (nongit)
1081                                die("remote-curl: fetch attempted without a local repo");
1082                        parse_fetch(&buf);
1083
1084                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1085                        int for_push = !!strstr(buf.buf + 4, "for-push");
1086                        output_refs(get_refs(for_push));
1087
1088                } else if (starts_with(buf.buf, "push ")) {
1089                        parse_push(&buf);
1090
1091                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1092                        char *value = strchr(arg, ' ');
1093                        int result;
1094
1095                        if (value)
1096                                *value++ = '\0';
1097                        else
1098                                value = "true";
1099
1100                        result = set_option(arg, value);
1101                        if (!result)
1102                                printf("ok\n");
1103                        else if (result < 0)
1104                                printf("error invalid value\n");
1105                        else
1106                                printf("unsupported\n");
1107                        fflush(stdout);
1108
1109                } else if (!strcmp(buf.buf, "capabilities")) {
1110                        printf("fetch\n");
1111                        printf("option\n");
1112                        printf("push\n");
1113                        printf("check-connectivity\n");
1114                        printf("\n");
1115                        fflush(stdout);
1116                } else {
1117                        error("remote-curl: unknown command '%s' from git", buf.buf);
1118                        return 1;
1119                }
1120                strbuf_reset(&buf);
1121        } while (1);
1122
1123        http_cleanup();
1124
1125        return 0;
1126}