9 #include "run-command.h"
11 #include "string-list.h"
13 #include "argv-array.h"
14 #include "credential.h"
15 #include "sha1-array.h"
16 #include "send-pack.h"
20 static struct remote *remote;
21 /* always ends with a trailing slash */
22 static struct strbuf url = STRBUF_INIT;
28 struct string_list deepen_not;
29 struct string_list push_options;
31 unsigned progress : 1,
32 check_self_contained_and_connected : 1,
38 /* One of the SEND_PACK_PUSH_CERT_* constants. */
44 static struct options options;
45 static struct string_list cas_options = STRING_LIST_INIT_DUP;
47 static int set_option(const char *name, const char *value)
49 if (!strcmp(name, "verbosity")) {
51 int v = strtol(value, &end, 10);
52 if (value == end || *end)
54 options.verbosity = v;
57 else if (!strcmp(name, "progress")) {
58 if (!strcmp(value, "true"))
60 else if (!strcmp(value, "false"))
66 else if (!strcmp(name, "depth")) {
68 unsigned long v = strtoul(value, &end, 10);
69 if (value == end || *end)
74 else if (!strcmp(name, "deepen-since")) {
75 options.deepen_since = xstrdup(value);
78 else if (!strcmp(name, "deepen-not")) {
79 string_list_append(&options.deepen_not, value);
82 else if (!strcmp(name, "deepen-relative")) {
83 if (!strcmp(value, "true"))
84 options.deepen_relative = 1;
85 else if (!strcmp(value, "false"))
86 options.deepen_relative = 0;
91 else if (!strcmp(name, "followtags")) {
92 if (!strcmp(value, "true"))
93 options.followtags = 1;
94 else if (!strcmp(value, "false"))
95 options.followtags = 0;
100 else if (!strcmp(name, "dry-run")) {
101 if (!strcmp(value, "true"))
103 else if (!strcmp(value, "false"))
109 else if (!strcmp(name, "check-connectivity")) {
110 if (!strcmp(value, "true"))
111 options.check_self_contained_and_connected = 1;
112 else if (!strcmp(value, "false"))
113 options.check_self_contained_and_connected = 0;
118 else if (!strcmp(name, "cas")) {
119 struct strbuf val = STRBUF_INIT;
120 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
121 string_list_append(&cas_options, val.buf);
122 strbuf_release(&val);
124 } else if (!strcmp(name, "cloning")) {
125 if (!strcmp(value, "true"))
127 else if (!strcmp(value, "false"))
132 } else if (!strcmp(name, "update-shallow")) {
133 if (!strcmp(value, "true"))
134 options.update_shallow = 1;
135 else if (!strcmp(value, "false"))
136 options.update_shallow = 0;
140 } else if (!strcmp(name, "pushcert")) {
141 if (!strcmp(value, "true"))
142 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
143 else if (!strcmp(value, "false"))
144 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
145 else if (!strcmp(value, "if-asked"))
146 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
150 } else if (!strcmp(name, "push-option")) {
152 string_list_append(&options.push_options, value);
154 struct strbuf unquoted = STRBUF_INIT;
155 if (unquote_c_style(&unquoted, value, NULL) < 0)
156 die("invalid quoting in push-option value");
157 string_list_append_nodup(&options.push_options,
158 strbuf_detach(&unquoted, NULL));
162 #if LIBCURL_VERSION_NUM >= 0x070a08
163 } else if (!strcmp(name, "family")) {
164 if (!strcmp(value, "ipv4"))
165 git_curl_ipresolve = CURL_IPRESOLVE_V4;
166 else if (!strcmp(value, "ipv6"))
167 git_curl_ipresolve = CURL_IPRESOLVE_V6;
168 else if (!strcmp(value, "all"))
169 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
173 #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
174 } else if (!strcmp(name, "from-promisor")) {
175 options.from_promisor = 1;
177 } else if (!strcmp(name, "no-dependents")) {
178 options.no_dependents = 1;
180 } else if (!strcmp(name, "filter")) {
181 options.filter = xstrdup(value);
184 return 1 /* unsupported */;
194 struct oid_array shallow;
195 enum protocol_version version;
196 unsigned proto_git : 1;
198 static struct discovery *last_discovery;
200 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
202 struct ref *list = NULL;
203 struct packet_reader reader;
205 packet_reader_init(&reader, -1, heads->buf, heads->len,
206 PACKET_READ_CHOMP_NEWLINE |
207 PACKET_READ_GENTLE_ON_EOF |
208 PACKET_READ_DIE_ON_ERR_PACKET);
210 heads->version = discover_version(&reader);
211 switch (heads->version) {
214 * Do nothing. This isn't a list of refs but rather a
215 * capability advertisement. Client would have run
216 * 'stateless-connect' so we'll dump this capability listing
217 * and let them request the refs themselves.
222 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
223 NULL, &heads->shallow);
225 case protocol_unknown_version:
226 BUG("unknown protocol version");
232 static struct ref *parse_info_refs(struct discovery *heads)
234 char *data, *start, *mid;
238 struct ref *refs = NULL;
239 struct ref *ref = NULL;
240 struct ref *last_ref = NULL;
245 while (i < heads->len) {
251 if (data[i] == '\n') {
252 if (mid - start != 40)
253 die("%sinfo/refs not valid: is this a git repository?",
257 ref = alloc_ref(ref_name);
258 get_oid_hex(start, &ref->old_oid);
262 last_ref->next = ref;
269 ref = alloc_ref("HEAD");
270 if (!http_fetch_ref(url.buf, ref) &&
271 !resolve_remote_symref(ref, refs)) {
281 static void free_discovery(struct discovery *d)
284 if (d == last_discovery)
285 last_discovery = NULL;
286 free(d->shallow.oid);
294 static int show_http_message(struct strbuf *type, struct strbuf *charset,
300 * We only show text/plain parts, as other types are likely
301 * to be ugly to look at on the user's terminal.
303 if (strcmp(type->buf, "text/plain"))
306 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
314 eol = strchrnul(p, '\n');
315 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
321 static int get_protocol_http_header(enum protocol_version version,
322 struct strbuf *header)
325 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
334 static void check_smart_http(struct discovery *d, const char *service,
338 struct packet_reader reader;
341 * If we don't see x-$service-advertisement, then it's not smart-http.
342 * But once we do, we commit to it and assume any other protocol
343 * violations are hard errors.
345 if (!skip_prefix(type->buf, "application/x-", &p) ||
346 !skip_prefix(p, service, &p) ||
347 strcmp(p, "-advertisement"))
350 packet_reader_init(&reader, -1, d->buf, d->len,
351 PACKET_READ_CHOMP_NEWLINE |
352 PACKET_READ_DIE_ON_ERR_PACKET);
353 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
354 die("invalid server response; expected service, got flush packet");
356 if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
358 * The header can include additional metadata lines, up
359 * until a packet flush marker. Ignore these now, but
360 * in the future we might start to scan them.
363 packet_reader_read(&reader);
364 if (reader.pktlen <= 0) {
370 * v0 smart http; callers expect us to soak up the
371 * service and header packets
373 d->buf = reader.src_buffer;
374 d->len = reader.src_len;
377 } else if (!strcmp(reader.line, "version 2")) {
379 * v2 smart http; do not consume version packet, which will
380 * be handled elsewhere.
385 die("invalid server response; got '%s'", reader.line);
389 static struct discovery *discover_refs(const char *service, int for_push)
391 struct strbuf type = STRBUF_INIT;
392 struct strbuf charset = STRBUF_INIT;
393 struct strbuf buffer = STRBUF_INIT;
394 struct strbuf refs_url = STRBUF_INIT;
395 struct strbuf effective_url = STRBUF_INIT;
396 struct strbuf protocol_header = STRBUF_INIT;
397 struct string_list extra_headers = STRING_LIST_INIT_DUP;
398 struct discovery *last = last_discovery;
399 int http_ret, maybe_smart = 0;
400 struct http_get_options http_options;
401 enum protocol_version version = get_protocol_version_config();
403 if (last && !strcmp(service, last->service))
405 free_discovery(last);
407 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
408 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
409 git_env_bool("GIT_SMART_HTTP", 1)) {
411 if (!strchr(url.buf, '?'))
412 strbuf_addch(&refs_url, '?');
414 strbuf_addch(&refs_url, '&');
415 strbuf_addf(&refs_url, "service=%s", service);
419 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
420 * to perform a push, then fallback to v0 since the client doesn't know
421 * how to push yet using v2.
423 if (version == protocol_v2 && !strcmp("git-receive-pack", service))
424 version = protocol_v0;
426 /* Add the extra Git-Protocol header */
427 if (get_protocol_http_header(version, &protocol_header))
428 string_list_append(&extra_headers, protocol_header.buf);
430 memset(&http_options, 0, sizeof(http_options));
431 http_options.content_type = &type;
432 http_options.charset = &charset;
433 http_options.effective_url = &effective_url;
434 http_options.base_url = &url;
435 http_options.extra_headers = &extra_headers;
436 http_options.initial_request = 1;
437 http_options.no_cache = 1;
439 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
443 case HTTP_MISSING_TARGET:
444 show_http_message(&type, &charset, &buffer);
445 die("repository '%s' not found", url.buf);
447 show_http_message(&type, &charset, &buffer);
448 die("Authentication failed for '%s'", url.buf);
450 show_http_message(&type, &charset, &buffer);
451 die("unable to access '%s': %s", url.buf, curl_errorstr);
454 if (options.verbosity && !starts_with(refs_url.buf, url.buf))
455 warning(_("redirecting to %s"), url.buf);
457 last= xcalloc(1, sizeof(*last_discovery));
458 last->service = xstrdup(service);
459 last->buf_alloc = strbuf_detach(&buffer, &last->len);
460 last->buf = last->buf_alloc;
463 check_smart_http(last, service, &type);
466 last->refs = parse_git_refs(last, for_push);
468 last->refs = parse_info_refs(last);
470 strbuf_release(&refs_url);
471 strbuf_release(&type);
472 strbuf_release(&charset);
473 strbuf_release(&effective_url);
474 strbuf_release(&buffer);
475 strbuf_release(&protocol_header);
476 string_list_clear(&extra_headers, 0);
477 last_discovery = last;
481 static struct ref *get_refs(int for_push)
483 struct discovery *heads;
486 heads = discover_refs("git-receive-pack", for_push);
488 heads = discover_refs("git-upload-pack", for_push);
493 static void output_refs(struct ref *refs)
496 for (posn = refs; posn; posn = posn->next) {
498 printf("@%s %s\n", posn->symref, posn->name);
500 printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
507 const char *service_name;
509 struct strbuf *stdin_preamble;
511 char *hdr_content_type;
513 char *protocol_header;
521 struct strbuf result;
522 unsigned gzip_request : 1;
523 unsigned initial_buffer : 1;
526 static size_t rpc_out(void *ptr, size_t eltsize,
527 size_t nmemb, void *buffer_)
529 size_t max = eltsize * nmemb;
530 struct rpc_state *rpc = buffer_;
531 size_t avail = rpc->len - rpc->pos;
534 rpc->initial_buffer = 0;
535 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
544 memcpy(ptr, rpc->buf + rpc->pos, avail);
549 #ifndef NO_CURL_IOCTL
550 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
552 struct rpc_state *rpc = clientp;
558 case CURLIOCMD_RESTARTREAD:
559 if (rpc->initial_buffer) {
563 error("unable to rewind rpc post data - try increasing http.postBuffer");
564 return CURLIOE_FAILRESTART;
567 return CURLIOE_UNKNOWNCMD;
573 struct rpc_state *rpc;
574 struct active_request_slot *slot;
578 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
581 static size_t rpc_in(char *ptr, size_t eltsize,
582 size_t nmemb, void *buffer_)
584 size_t size = eltsize * nmemb;
585 struct rpc_in_data *data = buffer_;
588 if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
589 &response_code) != CURLE_OK)
591 if (response_code >= 300)
594 data->rpc->any_written = 1;
595 write_or_die(data->rpc->in, ptr, size);
599 static int run_slot(struct active_request_slot *slot,
600 struct slot_results *results)
603 struct slot_results results_buf;
606 results = &results_buf;
608 err = run_one_slot(slot, results);
610 if (err != HTTP_OK && err != HTTP_REAUTH) {
611 struct strbuf msg = STRBUF_INIT;
612 if (results->http_code && results->http_code != 200)
613 strbuf_addf(&msg, "HTTP %ld", results->http_code);
614 if (results->curl_result != CURLE_OK) {
616 strbuf_addch(&msg, ' ');
617 strbuf_addf(&msg, "curl %d", results->curl_result);
618 if (curl_errorstr[0]) {
619 strbuf_addch(&msg, ' ');
620 strbuf_addstr(&msg, curl_errorstr);
623 error("RPC failed; %s", msg.buf);
624 strbuf_release(&msg);
630 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
632 struct active_request_slot *slot;
633 struct curl_slist *headers = http_copy_default_headers();
634 struct strbuf buf = STRBUF_INIT;
637 slot = get_active_slot();
639 headers = curl_slist_append(headers, rpc->hdr_content_type);
640 headers = curl_slist_append(headers, rpc->hdr_accept);
642 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
643 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
644 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
645 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
646 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
647 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
648 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
649 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
650 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
652 err = run_slot(slot, results);
654 curl_slist_free_all(headers);
655 strbuf_release(&buf);
659 static curl_off_t xcurl_off_t(size_t len)
661 uintmax_t size = len;
662 if (size > maximum_signed_value_of_type(curl_off_t))
663 die("cannot handle pushes this big");
664 return (curl_off_t)size;
667 static int post_rpc(struct rpc_state *rpc)
669 struct active_request_slot *slot;
670 struct curl_slist *headers = http_copy_default_headers();
671 int use_gzip = rpc->gzip_request;
672 char *gzip_body = NULL;
673 size_t gzip_size = 0;
674 int err, large_request = 0;
675 int needs_100_continue = 0;
676 struct rpc_in_data rpc_in_data;
678 /* Try to load the entire request, if we can fit it into the
679 * allocated buffer space we can use HTTP/1.0 and avoid the
680 * chunked encoding mess.
683 size_t left = rpc->alloc - rpc->len;
684 char *buf = rpc->buf + rpc->len;
687 if (left < LARGE_PACKET_MAX) {
693 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
700 struct slot_results results;
703 err = probe_rpc(rpc, &results);
704 if (err == HTTP_REAUTH)
705 credential_fill(&http_auth);
706 } while (err == HTTP_REAUTH);
710 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
711 needs_100_continue = 1;
714 headers = curl_slist_append(headers, rpc->hdr_content_type);
715 headers = curl_slist_append(headers, rpc->hdr_accept);
716 headers = curl_slist_append(headers, needs_100_continue ?
717 "Expect: 100-continue" : "Expect:");
719 /* Add the extra Git-Protocol header */
720 if (rpc->protocol_header)
721 headers = curl_slist_append(headers, rpc->protocol_header);
724 slot = get_active_slot();
726 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
727 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
728 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
729 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
732 /* The request body is large and the size cannot be predicted.
733 * We must use chunked encoding to send it.
735 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
736 rpc->initial_buffer = 1;
737 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
738 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
739 #ifndef NO_CURL_IOCTL
740 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
741 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
743 if (options.verbosity > 1) {
744 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
748 } else if (gzip_body) {
750 * If we are looping to retry authentication, then the previous
751 * run will have set up the headers and gzip buffer already,
752 * and we just need to send it.
754 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
755 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
757 } else if (use_gzip && 1024 < rpc->len) {
758 /* The client backend isn't giving us compressed data so
759 * we can try to deflate it ourselves, this may save on
765 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
766 gzip_size = git_deflate_bound(&stream, rpc->len);
767 gzip_body = xmalloc(gzip_size);
769 stream.next_in = (unsigned char *)rpc->buf;
770 stream.avail_in = rpc->len;
771 stream.next_out = (unsigned char *)gzip_body;
772 stream.avail_out = gzip_size;
774 ret = git_deflate(&stream, Z_FINISH);
775 if (ret != Z_STREAM_END)
776 die("cannot deflate request; zlib deflate error %d", ret);
778 ret = git_deflate_end_gently(&stream);
780 die("cannot deflate request; zlib end error %d", ret);
782 gzip_size = stream.total_out;
784 headers = curl_slist_append(headers, "Content-Encoding: gzip");
785 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
786 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
788 if (options.verbosity > 1) {
789 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
791 (unsigned long)rpc->len, (unsigned long)gzip_size);
795 /* We know the complete request size in advance, use the
796 * more normal Content-Length approach.
798 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
799 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
800 if (options.verbosity > 1) {
801 fprintf(stderr, "POST %s (%lu bytes)\n",
802 rpc->service_name, (unsigned long)rpc->len);
807 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
808 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
809 rpc_in_data.rpc = rpc;
810 rpc_in_data.slot = slot;
811 curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
812 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
815 rpc->any_written = 0;
816 err = run_slot(slot, NULL);
817 if (err == HTTP_REAUTH && !large_request) {
818 credential_fill(&http_auth);
824 if (!rpc->any_written)
827 curl_slist_free_all(headers);
832 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
834 const char *svc = rpc->service_name;
835 struct strbuf buf = STRBUF_INIT;
836 struct strbuf *preamble = rpc->stdin_preamble;
837 struct child_process client = CHILD_PROCESS_INIT;
843 client.argv = rpc->argv;
844 if (start_command(&client))
847 write_or_die(client.in, preamble->buf, preamble->len);
849 write_or_die(client.in, heads->buf, heads->len);
851 rpc->alloc = http_post_buffer;
852 rpc->buf = xmalloc(rpc->alloc);
854 rpc->out = client.out;
855 strbuf_init(&rpc->result, 0);
857 strbuf_addf(&buf, "%s%s", url.buf, svc);
858 rpc->service_url = strbuf_detach(&buf, NULL);
860 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
861 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
863 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
864 rpc->hdr_accept = strbuf_detach(&buf, NULL);
866 if (get_protocol_http_header(heads->version, &buf))
867 rpc->protocol_header = strbuf_detach(&buf, NULL);
869 rpc->protocol_header = NULL;
872 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
877 err |= post_rpc(rpc);
883 strbuf_read(&rpc->result, client.out, 0);
887 if (xread(client.out, buf, sizeof(buf)) <= 0)
894 err |= finish_command(&client);
895 free(rpc->service_url);
896 free(rpc->hdr_content_type);
897 free(rpc->hdr_accept);
898 free(rpc->protocol_header);
900 strbuf_release(&buf);
904 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
906 struct walker *walker;
910 ALLOC_ARRAY(targets, nr_heads);
911 if (options.depth || options.deepen_since)
912 die("dumb http transport does not support shallow capabilities");
913 for (i = 0; i < nr_heads; i++)
914 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
916 walker = get_http_walker(url.buf);
917 walker->get_verbosely = options.verbosity >= 3;
918 walker->get_recover = 0;
919 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
922 for (i = 0; i < nr_heads; i++)
926 return ret ? error("fetch failed.") : 0;
929 static int fetch_git(struct discovery *heads,
930 int nr_heads, struct ref **to_fetch)
932 struct rpc_state rpc;
933 struct strbuf preamble = STRBUF_INIT;
935 struct argv_array args = ARGV_ARRAY_INIT;
937 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
938 "--stdin", "--lock-pack", NULL);
939 if (options.followtags)
940 argv_array_push(&args, "--include-tag");
942 argv_array_push(&args, "--thin");
943 if (options.verbosity >= 3)
944 argv_array_pushl(&args, "-v", "-v", NULL);
945 if (options.check_self_contained_and_connected)
946 argv_array_push(&args, "--check-self-contained-and-connected");
948 argv_array_push(&args, "--cloning");
949 if (options.update_shallow)
950 argv_array_push(&args, "--update-shallow");
951 if (!options.progress)
952 argv_array_push(&args, "--no-progress");
954 argv_array_pushf(&args, "--depth=%lu", options.depth);
955 if (options.deepen_since)
956 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
957 for (i = 0; i < options.deepen_not.nr; i++)
958 argv_array_pushf(&args, "--shallow-exclude=%s",
959 options.deepen_not.items[i].string);
960 if (options.deepen_relative && options.depth)
961 argv_array_push(&args, "--deepen-relative");
962 if (options.from_promisor)
963 argv_array_push(&args, "--from-promisor");
964 if (options.no_dependents)
965 argv_array_push(&args, "--no-dependents");
967 argv_array_pushf(&args, "--filter=%s", options.filter);
968 argv_array_push(&args, url.buf);
970 for (i = 0; i < nr_heads; i++) {
971 struct ref *ref = to_fetch[i];
973 die("cannot fetch by sha1 over smart http");
974 packet_buf_write(&preamble, "%s %s\n",
975 oid_to_hex(&ref->old_oid), ref->name);
977 packet_buf_flush(&preamble);
979 memset(&rpc, 0, sizeof(rpc));
980 rpc.service_name = "git-upload-pack",
981 rpc.argv = args.argv;
982 rpc.stdin_preamble = &preamble;
983 rpc.gzip_request = 1;
985 err = rpc_service(&rpc, heads);
987 write_or_die(1, rpc.result.buf, rpc.result.len);
988 strbuf_release(&rpc.result);
989 strbuf_release(&preamble);
990 argv_array_clear(&args);
994 static int fetch(int nr_heads, struct ref **to_fetch)
996 struct discovery *d = discover_refs("git-upload-pack", 0);
998 return fetch_git(d, nr_heads, to_fetch);
1000 return fetch_dumb(nr_heads, to_fetch);
1003 static void parse_fetch(struct strbuf *buf)
1005 struct ref **to_fetch = NULL;
1006 struct ref *list_head = NULL;
1007 struct ref **list = &list_head;
1008 int alloc_heads = 0, nr_heads = 0;
1012 if (skip_prefix(buf->buf, "fetch ", &p)) {
1015 struct object_id old_oid;
1017 if (get_oid_hex(p, &old_oid))
1018 die("protocol error: expected sha/ref, got %s'", p);
1019 if (p[GIT_SHA1_HEXSZ] == ' ')
1020 name = p + GIT_SHA1_HEXSZ + 1;
1021 else if (!p[GIT_SHA1_HEXSZ])
1024 die("protocol error: expected sha/ref, got %s'", p);
1026 ref = alloc_ref(name);
1027 oidcpy(&ref->old_oid, &old_oid);
1032 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1033 to_fetch[nr_heads++] = ref;
1036 die("http transport does not support %s", buf->buf);
1039 if (strbuf_getline_lf(buf, stdin) == EOF)
1045 if (fetch(nr_heads, to_fetch))
1046 exit(128); /* error already reported */
1047 free_refs(list_head);
1055 static int push_dav(int nr_spec, char **specs)
1057 struct child_process child = CHILD_PROCESS_INIT;
1061 argv_array_push(&child.args, "http-push");
1062 argv_array_push(&child.args, "--helper-status");
1063 if (options.dry_run)
1064 argv_array_push(&child.args, "--dry-run");
1065 if (options.verbosity > 1)
1066 argv_array_push(&child.args, "--verbose");
1067 argv_array_push(&child.args, url.buf);
1068 for (i = 0; i < nr_spec; i++)
1069 argv_array_push(&child.args, specs[i]);
1071 if (run_command(&child))
1072 die("git-http-push failed");
1076 static int push_git(struct discovery *heads, int nr_spec, char **specs)
1078 struct rpc_state rpc;
1080 struct argv_array args;
1081 struct string_list_item *cas_option;
1082 struct strbuf preamble = STRBUF_INIT;
1084 argv_array_init(&args);
1085 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1089 argv_array_push(&args, "--thin");
1090 if (options.dry_run)
1091 argv_array_push(&args, "--dry-run");
1092 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1093 argv_array_push(&args, "--signed=yes");
1094 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1095 argv_array_push(&args, "--signed=if-asked");
1096 if (options.verbosity == 0)
1097 argv_array_push(&args, "--quiet");
1098 else if (options.verbosity > 1)
1099 argv_array_push(&args, "--verbose");
1100 for (i = 0; i < options.push_options.nr; i++)
1101 argv_array_pushf(&args, "--push-option=%s",
1102 options.push_options.items[i].string);
1103 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
1104 for_each_string_list_item(cas_option, &cas_options)
1105 argv_array_push(&args, cas_option->string);
1106 argv_array_push(&args, url.buf);
1108 argv_array_push(&args, "--stdin");
1109 for (i = 0; i < nr_spec; i++)
1110 packet_buf_write(&preamble, "%s\n", specs[i]);
1111 packet_buf_flush(&preamble);
1113 memset(&rpc, 0, sizeof(rpc));
1114 rpc.service_name = "git-receive-pack",
1115 rpc.argv = args.argv;
1116 rpc.stdin_preamble = &preamble;
1118 err = rpc_service(&rpc, heads);
1120 write_or_die(1, rpc.result.buf, rpc.result.len);
1121 strbuf_release(&rpc.result);
1122 strbuf_release(&preamble);
1123 argv_array_clear(&args);
1127 static int push(int nr_spec, char **specs)
1129 struct discovery *heads = discover_refs("git-receive-pack", 1);
1132 if (heads->proto_git)
1133 ret = push_git(heads, nr_spec, specs);
1135 ret = push_dav(nr_spec, specs);
1136 free_discovery(heads);
1140 static void parse_push(struct strbuf *buf)
1142 char **specs = NULL;
1143 int alloc_spec = 0, nr_spec = 0, i, ret;
1146 if (starts_with(buf->buf, "push ")) {
1147 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1148 specs[nr_spec++] = xstrdup(buf->buf + 5);
1151 die("http transport does not support %s", buf->buf);
1154 if (strbuf_getline_lf(buf, stdin) == EOF)
1160 ret = push(nr_spec, specs);
1165 exit(128); /* error already reported */
1168 for (i = 0; i < nr_spec; i++)
1174 * Used to represent the state of a connection to an HTTP server when
1175 * communicating using git's wire-protocol version 2.
1177 struct proxy_state {
1180 struct curl_slist *headers;
1181 struct strbuf request_buffer;
1184 struct packet_reader reader;
1189 static void proxy_state_init(struct proxy_state *p, const char *service_name,
1190 enum protocol_version version)
1192 struct strbuf buf = STRBUF_INIT;
1194 memset(p, 0, sizeof(*p));
1195 p->service_name = xstrdup(service_name);
1199 strbuf_init(&p->request_buffer, 0);
1201 strbuf_addf(&buf, "%s%s", url.buf, p->service_name);
1202 p->service_url = strbuf_detach(&buf, NULL);
1204 p->headers = http_copy_default_headers();
1206 strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name);
1207 p->headers = curl_slist_append(p->headers, buf.buf);
1210 strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name);
1211 p->headers = curl_slist_append(p->headers, buf.buf);
1214 p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked");
1216 /* Add the Git-Protocol header */
1217 if (get_protocol_http_header(version, &buf))
1218 p->headers = curl_slist_append(p->headers, buf.buf);
1220 packet_reader_init(&p->reader, p->in, NULL, 0,
1221 PACKET_READ_GENTLE_ON_EOF |
1222 PACKET_READ_DIE_ON_ERR_PACKET);
1224 strbuf_release(&buf);
1227 static void proxy_state_clear(struct proxy_state *p)
1229 free(p->service_name);
1230 free(p->service_url);
1231 curl_slist_free_all(p->headers);
1232 strbuf_release(&p->request_buffer);
1236 * CURLOPT_READFUNCTION callback function.
1237 * Attempts to copy over a single packet-line at a time into the
1238 * curl provided buffer.
1240 static size_t proxy_in(char *buffer, size_t eltsize,
1241 size_t nmemb, void *userdata)
1244 struct proxy_state *p = userdata;
1245 size_t avail = p->request_buffer.len - p->pos;
1249 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1250 (uintmax_t)eltsize);
1254 if (p->seen_flush) {
1259 strbuf_reset(&p->request_buffer);
1260 switch (packet_reader_read(&p->reader)) {
1261 case PACKET_READ_EOF:
1262 die("unexpected EOF when reading from parent process");
1263 case PACKET_READ_NORMAL:
1264 packet_buf_write_len(&p->request_buffer, p->reader.line,
1267 case PACKET_READ_DELIM:
1268 packet_buf_delim(&p->request_buffer);
1270 case PACKET_READ_FLUSH:
1271 packet_buf_flush(&p->request_buffer);
1276 avail = p->request_buffer.len;
1281 memcpy(buffer, p->request_buffer.buf + p->pos, avail);
1286 static size_t proxy_out(char *buffer, size_t eltsize,
1287 size_t nmemb, void *userdata)
1290 struct proxy_state *p = userdata;
1293 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1294 (uintmax_t)eltsize);
1297 write_or_die(p->out, buffer, size);
1301 /* Issues a request to the HTTP server configured in `p` */
1302 static int proxy_request(struct proxy_state *p)
1304 struct active_request_slot *slot;
1306 slot = get_active_slot();
1308 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1309 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1310 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
1311 curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url);
1312 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers);
1314 /* Setup function to read request from client */
1315 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in);
1316 curl_easy_setopt(slot->curl, CURLOPT_READDATA, p);
1318 /* Setup function to write server response to client */
1319 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out);
1320 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p);
1322 if (run_slot(slot, NULL) != HTTP_OK)
1328 static int stateless_connect(const char *service_name)
1330 struct discovery *discover;
1331 struct proxy_state p;
1334 * Run the info/refs request and see if the server supports protocol
1335 * v2. If and only if the server supports v2 can we successfully
1336 * establish a stateless connection, otherwise we need to tell the
1337 * client to fallback to using other transport helper functions to
1338 * complete their request.
1340 discover = discover_refs(service_name, 0);
1341 if (discover->version != protocol_v2) {
1342 printf("fallback\n");
1346 /* Stateless Connection established */
1351 proxy_state_init(&p, service_name, discover->version);
1354 * Dump the capability listing that we got from the server earlier
1355 * during the info/refs request.
1357 write_or_die(p.out, discover->buf, discover->len);
1359 /* Peek the next packet line. Until we see EOF keep sending POSTs */
1360 while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) {
1361 if (proxy_request(&p)) {
1362 /* We would have an err here */
1367 proxy_state_clear(&p);
1371 int cmd_main(int argc, const char **argv)
1373 struct strbuf buf = STRBUF_INIT;
1376 setup_git_directory_gently(&nongit);
1378 error("remote-curl: usage: git remote-curl <remote> [<url>]");
1382 options.verbosity = 1;
1383 options.progress = !!isatty(2);
1385 string_list_init(&options.deepen_not, 1);
1386 string_list_init(&options.push_options, 1);
1388 remote = remote_get(argv[1]);
1391 end_url_with_slash(&url, argv[2]);
1393 end_url_with_slash(&url, remote->url[0]);
1396 http_init(remote, url.buf, 0);
1401 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1403 error("remote-curl: error reading command stream from git");
1408 if (starts_with(buf.buf, "fetch ")) {
1410 die("remote-curl: fetch attempted without a local repo");
1413 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1414 int for_push = !!strstr(buf.buf + 4, "for-push");
1415 output_refs(get_refs(for_push));
1417 } else if (starts_with(buf.buf, "push ")) {
1420 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1421 char *value = strchr(arg, ' ');
1429 result = set_option(arg, value);
1432 else if (result < 0)
1433 printf("error invalid value\n");
1435 printf("unsupported\n");
1438 } else if (!strcmp(buf.buf, "capabilities")) {
1439 printf("stateless-connect\n");
1443 printf("check-connectivity\n");
1446 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1447 if (!stateless_connect(arg))
1450 error("remote-curl: unknown command '%s' from git", buf.buf);