7 #include "run-command.h"
11 static struct remote *remote;
12 static const char *url;
13 static struct walker *walker;
18 unsigned progress : 1,
23 static struct options options;
25 static void init_walker(void)
28 walker = get_http_walker(url, remote);
31 static int set_option(const char *name, const char *value)
33 if (!strcmp(name, "verbosity")) {
35 int v = strtol(value, &end, 10);
36 if (value == end || *end)
38 options.verbosity = v;
41 else if (!strcmp(name, "progress")) {
42 if (!strcmp(value, "true"))
44 else if (!strcmp(value, "false"))
50 else if (!strcmp(name, "depth")) {
52 unsigned long v = strtoul(value, &end, 10);
53 if (value == end || *end)
58 else if (!strcmp(name, "followtags")) {
59 if (!strcmp(value, "true"))
60 options.followtags = 1;
61 else if (!strcmp(value, "false"))
62 options.followtags = 0;
67 else if (!strcmp(name, "dry-run")) {
68 if (!strcmp(value, "true"))
70 else if (!strcmp(value, "false"))
77 return 1 /* unsupported */;
86 unsigned proto_git : 1;
88 static struct discovery *last_discovery;
90 static void free_discovery(struct discovery *d)
93 if (d == last_discovery)
94 last_discovery = NULL;
100 static struct discovery* discover_refs(const char *service)
102 struct strbuf buffer = STRBUF_INIT;
103 struct discovery *last = last_discovery;
105 int http_ret, is_http = 0, proto_git_candidate = 1;
107 if (last && !strcmp(service, last->service))
109 free_discovery(last);
111 strbuf_addf(&buffer, "%s/info/refs", url);
112 if (!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) {
114 if (!strchr(url, '?'))
115 strbuf_addch(&buffer, '?');
117 strbuf_addch(&buffer, '&');
118 strbuf_addf(&buffer, "service=%s", service);
120 refs_url = strbuf_detach(&buffer, NULL);
123 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
125 /* try again with "plain" url (no ? or & appended) */
126 if (http_ret != HTTP_OK) {
128 strbuf_reset(&buffer);
130 proto_git_candidate = 0;
131 strbuf_addf(&buffer, "%s/info/refs", url);
132 refs_url = strbuf_detach(&buffer, NULL);
134 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
140 case HTTP_MISSING_TARGET:
141 die("%s not found: did you run git update-server-info on the"
142 " server?", refs_url);
144 http_error(refs_url, http_ret);
145 die("HTTP request failed");
148 last= xcalloc(1, sizeof(*last_discovery));
149 last->service = service;
150 last->buf_alloc = strbuf_detach(&buffer, &last->len);
151 last->buf = last->buf_alloc;
153 if (is_http && proto_git_candidate
154 && 5 <= last->len && last->buf[4] == '#') {
155 /* smart HTTP response; validate that the service
156 * pkt-line matches our request.
158 struct strbuf exp = STRBUF_INIT;
160 if (packet_get_line(&buffer, &last->buf, &last->len) <= 0)
161 die("%s has invalid packet header", refs_url);
162 if (buffer.len && buffer.buf[buffer.len - 1] == '\n')
163 strbuf_setlen(&buffer, buffer.len - 1);
165 strbuf_addf(&exp, "# service=%s", service);
166 if (strbuf_cmp(&exp, &buffer))
167 die("invalid server response; got '%s'", buffer.buf);
168 strbuf_release(&exp);
170 /* The header can include additional metadata lines, up
171 * until a packet flush marker. Ignore these now, but
172 * in the future we might start to scan them.
174 strbuf_reset(&buffer);
175 while (packet_get_line(&buffer, &last->buf, &last->len) > 0)
176 strbuf_reset(&buffer);
182 strbuf_release(&buffer);
183 last_discovery = last;
187 static int write_discovery(int in, int out, void *data)
189 struct discovery *heads = data;
191 if (write_in_full(out, heads->buf, heads->len) != heads->len)
197 static struct ref *parse_git_refs(struct discovery *heads)
199 struct ref *list = NULL;
202 memset(&async, 0, sizeof(async));
203 async.proc = write_discovery;
207 if (start_async(&async))
208 die("cannot start thread to parse advertised refs");
209 get_remote_heads(async.out, &list, 0, NULL, 0, NULL);
211 if (finish_async(&async))
212 die("ref parsing thread failed");
216 static struct ref *parse_info_refs(struct discovery *heads)
218 char *data, *start, *mid;
222 struct ref *refs = NULL;
223 struct ref *ref = NULL;
224 struct ref *last_ref = NULL;
229 while (i < heads->len) {
235 if (data[i] == '\n') {
238 ref = xmalloc(sizeof(struct ref) +
239 strlen(ref_name) + 1);
240 memset(ref, 0, sizeof(struct ref));
241 strcpy(ref->name, ref_name);
242 get_sha1_hex(start, ref->old_sha1);
246 last_ref->next = ref;
254 ref = alloc_ref("HEAD");
255 if (!walker->fetch_ref(walker, ref) &&
256 !resolve_remote_symref(ref, refs)) {
266 static struct ref *get_refs(int for_push)
268 struct discovery *heads;
271 heads = discover_refs("git-receive-pack");
273 heads = discover_refs("git-upload-pack");
275 if (heads->proto_git)
276 return parse_git_refs(heads);
277 return parse_info_refs(heads);
280 static void output_refs(struct ref *refs)
283 for (posn = refs; posn; posn = posn->next) {
285 printf("@%s %s\n", posn->symref, posn->name);
287 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
295 const char *service_name;
298 char *hdr_content_type;
306 struct strbuf result;
307 unsigned gzip_request : 1;
310 static size_t rpc_out(void *ptr, size_t eltsize,
311 size_t nmemb, void *buffer_)
313 size_t max = eltsize * nmemb;
314 struct rpc_state *rpc = buffer_;
315 size_t avail = rpc->len - rpc->pos;
318 avail = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
327 memcpy(ptr, rpc->buf + rpc->pos, avail);
332 static size_t rpc_in(const void *ptr, size_t eltsize,
333 size_t nmemb, void *buffer_)
335 size_t size = eltsize * nmemb;
336 struct rpc_state *rpc = buffer_;
337 write_or_die(rpc->in, ptr, size);
341 static int post_rpc(struct rpc_state *rpc)
343 struct active_request_slot *slot;
344 struct slot_results results;
345 struct curl_slist *headers = NULL;
346 int use_gzip = rpc->gzip_request;
347 char *gzip_body = NULL;
348 int err = 0, large_request = 0;
350 /* Try to load the entire request, if we can fit it into the
351 * allocated buffer space we can use HTTP/1.0 and avoid the
352 * chunked encoding mess.
355 size_t left = rpc->alloc - rpc->len;
356 char *buf = rpc->buf + rpc->len;
359 if (left < LARGE_PACKET_MAX) {
365 n = packet_read_line(rpc->out, buf, left);
371 slot = get_active_slot();
372 slot->results = &results;
374 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
375 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
376 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
377 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
379 headers = curl_slist_append(headers, rpc->hdr_content_type);
380 headers = curl_slist_append(headers, rpc->hdr_accept);
383 /* The request body is large and the size cannot be predicted.
384 * We must use chunked encoding to send it.
386 headers = curl_slist_append(headers, "Expect: 100-continue");
387 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
388 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
389 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
390 if (options.verbosity > 1) {
391 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
395 } else if (use_gzip && 1024 < rpc->len) {
396 /* The client backend isn't giving us compressed data so
397 * we can try to deflate it ourselves, this may save on.
404 memset(&stream, 0, sizeof(stream));
405 ret = deflateInit2(&stream, Z_BEST_COMPRESSION,
406 Z_DEFLATED, (15 + 16),
407 8, Z_DEFAULT_STRATEGY);
409 die("cannot deflate request; zlib init error %d", ret);
410 size = deflateBound(&stream, rpc->len);
411 gzip_body = xmalloc(size);
413 stream.next_in = (unsigned char *)rpc->buf;
414 stream.avail_in = rpc->len;
415 stream.next_out = (unsigned char *)gzip_body;
416 stream.avail_out = size;
418 ret = deflate(&stream, Z_FINISH);
419 if (ret != Z_STREAM_END)
420 die("cannot deflate request; zlib deflate error %d", ret);
422 ret = deflateEnd(&stream);
424 die("cannot deflate request; zlib end error %d", ret);
426 size = stream.total_out;
428 headers = curl_slist_append(headers, "Content-Encoding: gzip");
429 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
430 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, size);
432 if (options.verbosity > 1) {
433 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
435 (unsigned long)rpc->len, (unsigned long)size);
439 /* We know the complete request size in advance, use the
440 * more normal Content-Length approach.
442 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
443 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
444 if (options.verbosity > 1) {
445 fprintf(stderr, "POST %s (%lu bytes)\n",
446 rpc->service_name, (unsigned long)rpc->len);
451 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
452 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
453 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
455 slot->curl_result = curl_easy_perform(slot->curl);
456 finish_active_slot(slot);
458 if (results.curl_result != CURLE_OK) {
459 err |= error("RPC failed; result=%d, HTTP code = %ld",
460 results.curl_result, results.http_code);
463 curl_slist_free_all(headers);
468 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
470 const char *svc = rpc->service_name;
471 struct strbuf buf = STRBUF_INIT;
472 struct child_process client;
476 memset(&client, 0, sizeof(client));
480 client.argv = rpc->argv;
481 if (start_command(&client))
484 write_or_die(client.in, heads->buf, heads->len);
486 rpc->alloc = http_post_buffer;
487 rpc->buf = xmalloc(rpc->alloc);
489 rpc->out = client.out;
490 strbuf_init(&rpc->result, 0);
492 strbuf_addf(&buf, "%s/%s", url, svc);
493 rpc->service_url = strbuf_detach(&buf, NULL);
495 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
496 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
498 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
499 rpc->hdr_accept = strbuf_detach(&buf, NULL);
502 int n = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
507 err |= post_rpc(rpc);
509 strbuf_read(&rpc->result, client.out, 0);
516 err |= finish_command(&client);
517 free(rpc->service_url);
518 free(rpc->hdr_content_type);
519 free(rpc->hdr_accept);
521 strbuf_release(&buf);
525 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
527 char **targets = xmalloc(nr_heads * sizeof(char*));
531 die("dumb http transport does not support --depth");
532 for (i = 0; i < nr_heads; i++)
533 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
537 walker->get_tree = 1;
538 walker->get_history = 1;
539 walker->get_verbosely = options.verbosity >= 3;
540 walker->get_recover = 0;
541 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
543 for (i = 0; i < nr_heads; i++)
547 return ret ? error("Fetch failed.") : 0;
550 static int fetch_git(struct discovery *heads,
551 int nr_heads, struct ref **to_fetch)
553 struct rpc_state rpc;
554 char *depth_arg = NULL;
556 int argc = 0, i, err;
558 argv = xmalloc((15 + nr_heads) * sizeof(char*));
559 argv[argc++] = "fetch-pack";
560 argv[argc++] = "--stateless-rpc";
561 argv[argc++] = "--lock-pack";
562 if (options.followtags)
563 argv[argc++] = "--include-tag";
565 argv[argc++] = "--thin";
566 if (options.verbosity >= 3) {
570 if (!options.progress)
571 argv[argc++] = "--no-progress";
573 struct strbuf buf = STRBUF_INIT;
574 strbuf_addf(&buf, "--depth=%lu", options.depth);
575 depth_arg = strbuf_detach(&buf, NULL);
576 argv[argc++] = depth_arg;
579 for (i = 0; i < nr_heads; i++) {
580 struct ref *ref = to_fetch[i];
581 if (!ref->name || !*ref->name)
582 die("cannot fetch by sha1 over smart http");
583 argv[argc++] = ref->name;
587 memset(&rpc, 0, sizeof(rpc));
588 rpc.service_name = "git-upload-pack",
590 rpc.gzip_request = 1;
592 err = rpc_service(&rpc, heads);
594 safe_write(1, rpc.result.buf, rpc.result.len);
595 strbuf_release(&rpc.result);
601 static int fetch(int nr_heads, struct ref **to_fetch)
603 struct discovery *d = discover_refs("git-upload-pack");
605 return fetch_git(d, nr_heads, to_fetch);
607 return fetch_dumb(nr_heads, to_fetch);
610 static void parse_fetch(struct strbuf *buf)
612 struct ref **to_fetch = NULL;
613 struct ref *list_head = NULL;
614 struct ref **list = &list_head;
615 int alloc_heads = 0, nr_heads = 0;
618 if (!prefixcmp(buf->buf, "fetch ")) {
619 char *p = buf->buf + strlen("fetch ");
622 unsigned char old_sha1[20];
624 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
625 die("protocol error: expected sha/ref, got %s'", p);
631 die("protocol error: expected sha/ref, got %s'", p);
633 ref = alloc_ref(name);
634 hashcpy(ref->old_sha1, old_sha1);
639 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
640 to_fetch[nr_heads++] = ref;
643 die("http transport does not support %s", buf->buf);
646 if (strbuf_getline(buf, stdin, '\n') == EOF)
652 if (fetch(nr_heads, to_fetch))
653 exit(128); /* error already reported */
654 free_refs(list_head);
662 static int push_dav(int nr_spec, char **specs)
664 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
667 argv[argc++] = "http-push";
668 argv[argc++] = "--helper-status";
670 argv[argc++] = "--dry-run";
671 if (options.verbosity > 1)
672 argv[argc++] = "--verbose";
674 for (i = 0; i < nr_spec; i++)
675 argv[argc++] = specs[i];
678 if (run_command_v_opt(argv, RUN_GIT_CMD))
679 die("git-%s failed", argv[0]);
684 static int push_git(struct discovery *heads, int nr_spec, char **specs)
686 struct rpc_state rpc;
688 int argc = 0, i, err;
690 argv = xmalloc((10 + nr_spec) * sizeof(char*));
691 argv[argc++] = "send-pack";
692 argv[argc++] = "--stateless-rpc";
693 argv[argc++] = "--helper-status";
695 argv[argc++] = "--thin";
697 argv[argc++] = "--dry-run";
698 if (options.verbosity > 1)
699 argv[argc++] = "--verbose";
701 for (i = 0; i < nr_spec; i++)
702 argv[argc++] = specs[i];
705 memset(&rpc, 0, sizeof(rpc));
706 rpc.service_name = "git-receive-pack",
709 err = rpc_service(&rpc, heads);
711 safe_write(1, rpc.result.buf, rpc.result.len);
712 strbuf_release(&rpc.result);
717 static int push(int nr_spec, char **specs)
719 struct discovery *heads = discover_refs("git-receive-pack");
722 if (heads->proto_git)
723 ret = push_git(heads, nr_spec, specs);
725 ret = push_dav(nr_spec, specs);
726 free_discovery(heads);
730 static void parse_push(struct strbuf *buf)
733 int alloc_spec = 0, nr_spec = 0, i;
736 if (!prefixcmp(buf->buf, "push ")) {
737 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
738 specs[nr_spec++] = xstrdup(buf->buf + 5);
741 die("http transport does not support %s", buf->buf);
744 if (strbuf_getline(buf, stdin, '\n') == EOF)
750 if (push(nr_spec, specs))
751 exit(128); /* error already reported */
752 for (i = 0; i < nr_spec; i++)
760 int main(int argc, const char **argv)
762 struct strbuf buf = STRBUF_INIT;
765 git_extract_argv0_path(argv[0]);
766 setup_git_directory_gently(&nongit);
768 fprintf(stderr, "Remote needed\n");
772 options.verbosity = 1;
773 options.progress = !!isatty(2);
776 remote = remote_get(argv[1]);
781 url = remote->url[0];
785 if (strbuf_getline(&buf, stdin, '\n') == EOF)
787 if (!prefixcmp(buf.buf, "fetch ")) {
789 die("Fetch attempted without a local repo");
792 } else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
793 int for_push = !!strstr(buf.buf + 4, "for-push");
794 output_refs(get_refs(for_push));
796 } else if (!prefixcmp(buf.buf, "push ")) {
799 } else if (!prefixcmp(buf.buf, "option ")) {
800 char *name = buf.buf + strlen("option ");
801 char *value = strchr(name, ' ');
809 result = set_option(name, value);
813 printf("error invalid value\n");
815 printf("unsupported\n");
818 } else if (!strcmp(buf.buf, "capabilities")) {