rebase --root: fix amending root commit messages
[git.git] / remote-curl.c
blob8d2ffaf8de4a0e2d5c58f3904aee5c1823997ebc
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 #include "quote.h"
18 static struct remote *remote;
19 /* always ends with a trailing slash */
20 static struct strbuf url = STRBUF_INIT;
22 struct options {
23 int verbosity;
24 unsigned long depth;
25 char *deepen_since;
26 struct string_list deepen_not;
27 struct string_list push_options;
28 char *filter;
29 unsigned progress : 1,
30 check_self_contained_and_connected : 1,
31 cloning : 1,
32 update_shallow : 1,
33 followtags : 1,
34 dry_run : 1,
35 thin : 1,
36 /* One of the SEND_PACK_PUSH_CERT_* constants. */
37 push_cert : 2,
38 deepen_relative : 1,
39 from_promisor : 1,
40 no_dependents : 1;
42 static struct options options;
43 static struct string_list cas_options = STRING_LIST_INIT_DUP;
45 static int set_option(const char *name, const char *value)
47 if (!strcmp(name, "verbosity")) {
48 char *end;
49 int v = strtol(value, &end, 10);
50 if (value == end || *end)
51 return -1;
52 options.verbosity = v;
53 return 0;
55 else if (!strcmp(name, "progress")) {
56 if (!strcmp(value, "true"))
57 options.progress = 1;
58 else if (!strcmp(value, "false"))
59 options.progress = 0;
60 else
61 return -1;
62 return 0;
64 else if (!strcmp(name, "depth")) {
65 char *end;
66 unsigned long v = strtoul(value, &end, 10);
67 if (value == end || *end)
68 return -1;
69 options.depth = v;
70 return 0;
72 else if (!strcmp(name, "deepen-since")) {
73 options.deepen_since = xstrdup(value);
74 return 0;
76 else if (!strcmp(name, "deepen-not")) {
77 string_list_append(&options.deepen_not, value);
78 return 0;
80 else if (!strcmp(name, "deepen-relative")) {
81 if (!strcmp(value, "true"))
82 options.deepen_relative = 1;
83 else if (!strcmp(value, "false"))
84 options.deepen_relative = 0;
85 else
86 return -1;
87 return 0;
89 else if (!strcmp(name, "followtags")) {
90 if (!strcmp(value, "true"))
91 options.followtags = 1;
92 else if (!strcmp(value, "false"))
93 options.followtags = 0;
94 else
95 return -1;
96 return 0;
98 else if (!strcmp(name, "dry-run")) {
99 if (!strcmp(value, "true"))
100 options.dry_run = 1;
101 else if (!strcmp(value, "false"))
102 options.dry_run = 0;
103 else
104 return -1;
105 return 0;
107 else if (!strcmp(name, "check-connectivity")) {
108 if (!strcmp(value, "true"))
109 options.check_self_contained_and_connected = 1;
110 else if (!strcmp(value, "false"))
111 options.check_self_contained_and_connected = 0;
112 else
113 return -1;
114 return 0;
116 else if (!strcmp(name, "cas")) {
117 struct strbuf val = STRBUF_INIT;
118 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
119 string_list_append(&cas_options, val.buf);
120 strbuf_release(&val);
121 return 0;
122 } else if (!strcmp(name, "cloning")) {
123 if (!strcmp(value, "true"))
124 options.cloning = 1;
125 else if (!strcmp(value, "false"))
126 options.cloning = 0;
127 else
128 return -1;
129 return 0;
130 } else if (!strcmp(name, "update-shallow")) {
131 if (!strcmp(value, "true"))
132 options.update_shallow = 1;
133 else if (!strcmp(value, "false"))
134 options.update_shallow = 0;
135 else
136 return -1;
137 return 0;
138 } else if (!strcmp(name, "pushcert")) {
139 if (!strcmp(value, "true"))
140 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
141 else if (!strcmp(value, "false"))
142 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
143 else if (!strcmp(value, "if-asked"))
144 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
145 else
146 return -1;
147 return 0;
148 } else if (!strcmp(name, "push-option")) {
149 if (*value != '"')
150 string_list_append(&options.push_options, value);
151 else {
152 struct strbuf unquoted = STRBUF_INIT;
153 if (unquote_c_style(&unquoted, value, NULL) < 0)
154 die("invalid quoting in push-option value");
155 string_list_append_nodup(&options.push_options,
156 strbuf_detach(&unquoted, NULL));
158 return 0;
160 #if LIBCURL_VERSION_NUM >= 0x070a08
161 } else if (!strcmp(name, "family")) {
162 if (!strcmp(value, "ipv4"))
163 git_curl_ipresolve = CURL_IPRESOLVE_V4;
164 else if (!strcmp(value, "ipv6"))
165 git_curl_ipresolve = CURL_IPRESOLVE_V6;
166 else if (!strcmp(value, "all"))
167 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
168 else
169 return -1;
170 return 0;
171 #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
172 } else if (!strcmp(name, "from-promisor")) {
173 options.from_promisor = 1;
174 return 0;
175 } else if (!strcmp(name, "no-dependents")) {
176 options.no_dependents = 1;
177 return 0;
178 } else if (!strcmp(name, "filter")) {
179 options.filter = xstrdup(value);;
180 return 0;
181 } else {
182 return 1 /* unsupported */;
186 struct discovery {
187 const char *service;
188 char *buf_alloc;
189 char *buf;
190 size_t len;
191 struct ref *refs;
192 struct oid_array shallow;
193 unsigned proto_git : 1;
195 static struct discovery *last_discovery;
197 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
199 struct ref *list = NULL;
200 get_remote_heads(-1, heads->buf, heads->len, &list,
201 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
202 return list;
205 static struct ref *parse_info_refs(struct discovery *heads)
207 char *data, *start, *mid;
208 char *ref_name;
209 int i = 0;
211 struct ref *refs = NULL;
212 struct ref *ref = NULL;
213 struct ref *last_ref = NULL;
215 data = heads->buf;
216 start = NULL;
217 mid = data;
218 while (i < heads->len) {
219 if (!start) {
220 start = &data[i];
222 if (data[i] == '\t')
223 mid = &data[i];
224 if (data[i] == '\n') {
225 if (mid - start != 40)
226 die("%sinfo/refs not valid: is this a git repository?",
227 url.buf);
228 data[i] = 0;
229 ref_name = mid + 1;
230 ref = alloc_ref(ref_name);
231 get_oid_hex(start, &ref->old_oid);
232 if (!refs)
233 refs = ref;
234 if (last_ref)
235 last_ref->next = ref;
236 last_ref = ref;
237 start = NULL;
239 i++;
242 ref = alloc_ref("HEAD");
243 if (!http_fetch_ref(url.buf, ref) &&
244 !resolve_remote_symref(ref, refs)) {
245 ref->next = refs;
246 refs = ref;
247 } else {
248 free(ref);
251 return refs;
254 static void free_discovery(struct discovery *d)
256 if (d) {
257 if (d == last_discovery)
258 last_discovery = NULL;
259 free(d->shallow.oid);
260 free(d->buf_alloc);
261 free_refs(d->refs);
262 free(d);
266 static int show_http_message(struct strbuf *type, struct strbuf *charset,
267 struct strbuf *msg)
269 const char *p, *eol;
272 * We only show text/plain parts, as other types are likely
273 * to be ugly to look at on the user's terminal.
275 if (strcmp(type->buf, "text/plain"))
276 return -1;
277 if (charset->len)
278 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
280 strbuf_trim(msg);
281 if (!msg->len)
282 return -1;
284 p = msg->buf;
285 do {
286 eol = strchrnul(p, '\n');
287 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
288 p = eol + 1;
289 } while(*eol);
290 return 0;
293 static struct discovery *discover_refs(const char *service, int for_push)
295 struct strbuf exp = STRBUF_INIT;
296 struct strbuf type = STRBUF_INIT;
297 struct strbuf charset = STRBUF_INIT;
298 struct strbuf buffer = STRBUF_INIT;
299 struct strbuf refs_url = STRBUF_INIT;
300 struct strbuf effective_url = STRBUF_INIT;
301 struct discovery *last = last_discovery;
302 int http_ret, maybe_smart = 0;
303 struct http_get_options http_options;
305 if (last && !strcmp(service, last->service))
306 return last;
307 free_discovery(last);
309 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
310 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
311 git_env_bool("GIT_SMART_HTTP", 1)) {
312 maybe_smart = 1;
313 if (!strchr(url.buf, '?'))
314 strbuf_addch(&refs_url, '?');
315 else
316 strbuf_addch(&refs_url, '&');
317 strbuf_addf(&refs_url, "service=%s", service);
320 memset(&http_options, 0, sizeof(http_options));
321 http_options.content_type = &type;
322 http_options.charset = &charset;
323 http_options.effective_url = &effective_url;
324 http_options.base_url = &url;
325 http_options.initial_request = 1;
326 http_options.no_cache = 1;
327 http_options.keep_error = 1;
329 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
330 switch (http_ret) {
331 case HTTP_OK:
332 break;
333 case HTTP_MISSING_TARGET:
334 show_http_message(&type, &charset, &buffer);
335 die("repository '%s' not found", url.buf);
336 case HTTP_NOAUTH:
337 show_http_message(&type, &charset, &buffer);
338 die("Authentication failed for '%s'", url.buf);
339 default:
340 show_http_message(&type, &charset, &buffer);
341 die("unable to access '%s': %s", url.buf, curl_errorstr);
344 if (options.verbosity && !starts_with(refs_url.buf, url.buf))
345 warning(_("redirecting to %s"), url.buf);
347 last= xcalloc(1, sizeof(*last_discovery));
348 last->service = service;
349 last->buf_alloc = strbuf_detach(&buffer, &last->len);
350 last->buf = last->buf_alloc;
352 strbuf_addf(&exp, "application/x-%s-advertisement", service);
353 if (maybe_smart &&
354 (5 <= last->len && last->buf[4] == '#') &&
355 !strbuf_cmp(&exp, &type)) {
356 char *line;
359 * smart HTTP response; validate that the service
360 * pkt-line matches our request.
362 line = packet_read_line_buf(&last->buf, &last->len, NULL);
363 if (!line)
364 die("invalid server response; expected service, got flush packet");
366 strbuf_reset(&exp);
367 strbuf_addf(&exp, "# service=%s", service);
368 if (strcmp(line, exp.buf))
369 die("invalid server response; got '%s'", line);
370 strbuf_release(&exp);
372 /* The header can include additional metadata lines, up
373 * until a packet flush marker. Ignore these now, but
374 * in the future we might start to scan them.
376 while (packet_read_line_buf(&last->buf, &last->len, NULL))
379 last->proto_git = 1;
382 if (last->proto_git)
383 last->refs = parse_git_refs(last, for_push);
384 else
385 last->refs = parse_info_refs(last);
387 strbuf_release(&refs_url);
388 strbuf_release(&exp);
389 strbuf_release(&type);
390 strbuf_release(&charset);
391 strbuf_release(&effective_url);
392 strbuf_release(&buffer);
393 last_discovery = last;
394 return last;
397 static struct ref *get_refs(int for_push)
399 struct discovery *heads;
401 if (for_push)
402 heads = discover_refs("git-receive-pack", for_push);
403 else
404 heads = discover_refs("git-upload-pack", for_push);
406 return heads->refs;
409 static void output_refs(struct ref *refs)
411 struct ref *posn;
412 for (posn = refs; posn; posn = posn->next) {
413 if (posn->symref)
414 printf("@%s %s\n", posn->symref, posn->name);
415 else
416 printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
418 printf("\n");
419 fflush(stdout);
422 struct rpc_state {
423 const char *service_name;
424 const char **argv;
425 struct strbuf *stdin_preamble;
426 char *service_url;
427 char *hdr_content_type;
428 char *hdr_accept;
429 char *buf;
430 size_t alloc;
431 size_t len;
432 size_t pos;
433 int in;
434 int out;
435 int any_written;
436 struct strbuf result;
437 unsigned gzip_request : 1;
438 unsigned initial_buffer : 1;
441 static size_t rpc_out(void *ptr, size_t eltsize,
442 size_t nmemb, void *buffer_)
444 size_t max = eltsize * nmemb;
445 struct rpc_state *rpc = buffer_;
446 size_t avail = rpc->len - rpc->pos;
448 if (!avail) {
449 rpc->initial_buffer = 0;
450 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
451 if (!avail)
452 return 0;
453 rpc->pos = 0;
454 rpc->len = avail;
457 if (max < avail)
458 avail = max;
459 memcpy(ptr, rpc->buf + rpc->pos, avail);
460 rpc->pos += avail;
461 return avail;
464 #ifndef NO_CURL_IOCTL
465 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
467 struct rpc_state *rpc = clientp;
469 switch (cmd) {
470 case CURLIOCMD_NOP:
471 return CURLIOE_OK;
473 case CURLIOCMD_RESTARTREAD:
474 if (rpc->initial_buffer) {
475 rpc->pos = 0;
476 return CURLIOE_OK;
478 error("unable to rewind rpc post data - try increasing http.postBuffer");
479 return CURLIOE_FAILRESTART;
481 default:
482 return CURLIOE_UNKNOWNCMD;
485 #endif
487 static size_t rpc_in(char *ptr, size_t eltsize,
488 size_t nmemb, void *buffer_)
490 size_t size = eltsize * nmemb;
491 struct rpc_state *rpc = buffer_;
492 if (size)
493 rpc->any_written = 1;
494 write_or_die(rpc->in, ptr, size);
495 return size;
498 static int run_slot(struct active_request_slot *slot,
499 struct slot_results *results)
501 int err;
502 struct slot_results results_buf;
504 if (!results)
505 results = &results_buf;
507 err = run_one_slot(slot, results);
509 if (err != HTTP_OK && err != HTTP_REAUTH) {
510 struct strbuf msg = STRBUF_INIT;
511 if (results->http_code && results->http_code != 200)
512 strbuf_addf(&msg, "HTTP %ld", results->http_code);
513 if (results->curl_result != CURLE_OK) {
514 if (msg.len)
515 strbuf_addch(&msg, ' ');
516 strbuf_addf(&msg, "curl %d", results->curl_result);
517 if (curl_errorstr[0]) {
518 strbuf_addch(&msg, ' ');
519 strbuf_addstr(&msg, curl_errorstr);
522 error("RPC failed; %s", msg.buf);
523 strbuf_release(&msg);
526 return err;
529 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
531 struct active_request_slot *slot;
532 struct curl_slist *headers = http_copy_default_headers();
533 struct strbuf buf = STRBUF_INIT;
534 int err;
536 slot = get_active_slot();
538 headers = curl_slist_append(headers, rpc->hdr_content_type);
539 headers = curl_slist_append(headers, rpc->hdr_accept);
541 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
542 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
543 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
544 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
545 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
546 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
547 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
548 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
549 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
551 err = run_slot(slot, results);
553 curl_slist_free_all(headers);
554 strbuf_release(&buf);
555 return err;
558 static curl_off_t xcurl_off_t(ssize_t len) {
559 if (len > maximum_signed_value_of_type(curl_off_t))
560 die("cannot handle pushes this big");
561 return (curl_off_t) len;
564 static int post_rpc(struct rpc_state *rpc)
566 struct active_request_slot *slot;
567 struct curl_slist *headers = http_copy_default_headers();
568 int use_gzip = rpc->gzip_request;
569 char *gzip_body = NULL;
570 size_t gzip_size = 0;
571 int err, large_request = 0;
572 int needs_100_continue = 0;
574 /* Try to load the entire request, if we can fit it into the
575 * allocated buffer space we can use HTTP/1.0 and avoid the
576 * chunked encoding mess.
578 while (1) {
579 size_t left = rpc->alloc - rpc->len;
580 char *buf = rpc->buf + rpc->len;
581 int n;
583 if (left < LARGE_PACKET_MAX) {
584 large_request = 1;
585 use_gzip = 0;
586 break;
589 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
590 if (!n)
591 break;
592 rpc->len += n;
595 if (large_request) {
596 struct slot_results results;
598 do {
599 err = probe_rpc(rpc, &results);
600 if (err == HTTP_REAUTH)
601 credential_fill(&http_auth);
602 } while (err == HTTP_REAUTH);
603 if (err != HTTP_OK)
604 return -1;
606 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
607 needs_100_continue = 1;
610 headers = curl_slist_append(headers, rpc->hdr_content_type);
611 headers = curl_slist_append(headers, rpc->hdr_accept);
612 headers = curl_slist_append(headers, needs_100_continue ?
613 "Expect: 100-continue" : "Expect:");
615 retry:
616 slot = get_active_slot();
618 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
619 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
620 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
621 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
623 if (large_request) {
624 /* The request body is large and the size cannot be predicted.
625 * We must use chunked encoding to send it.
627 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
628 rpc->initial_buffer = 1;
629 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
630 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
631 #ifndef NO_CURL_IOCTL
632 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
633 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
634 #endif
635 if (options.verbosity > 1) {
636 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
637 fflush(stderr);
640 } else if (gzip_body) {
642 * If we are looping to retry authentication, then the previous
643 * run will have set up the headers and gzip buffer already,
644 * and we just need to send it.
646 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
647 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
649 } else if (use_gzip && 1024 < rpc->len) {
650 /* The client backend isn't giving us compressed data so
651 * we can try to deflate it ourselves, this may save on.
652 * the transfer time.
654 git_zstream stream;
655 int ret;
657 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
658 gzip_size = git_deflate_bound(&stream, rpc->len);
659 gzip_body = xmalloc(gzip_size);
661 stream.next_in = (unsigned char *)rpc->buf;
662 stream.avail_in = rpc->len;
663 stream.next_out = (unsigned char *)gzip_body;
664 stream.avail_out = gzip_size;
666 ret = git_deflate(&stream, Z_FINISH);
667 if (ret != Z_STREAM_END)
668 die("cannot deflate request; zlib deflate error %d", ret);
670 ret = git_deflate_end_gently(&stream);
671 if (ret != Z_OK)
672 die("cannot deflate request; zlib end error %d", ret);
674 gzip_size = stream.total_out;
676 headers = curl_slist_append(headers, "Content-Encoding: gzip");
677 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
678 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
680 if (options.verbosity > 1) {
681 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
682 rpc->service_name,
683 (unsigned long)rpc->len, (unsigned long)gzip_size);
684 fflush(stderr);
686 } else {
687 /* We know the complete request size in advance, use the
688 * more normal Content-Length approach.
690 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
691 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
692 if (options.verbosity > 1) {
693 fprintf(stderr, "POST %s (%lu bytes)\n",
694 rpc->service_name, (unsigned long)rpc->len);
695 fflush(stderr);
699 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
700 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
701 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
704 rpc->any_written = 0;
705 err = run_slot(slot, NULL);
706 if (err == HTTP_REAUTH && !large_request) {
707 credential_fill(&http_auth);
708 goto retry;
710 if (err != HTTP_OK)
711 err = -1;
713 if (!rpc->any_written)
714 err = -1;
716 curl_slist_free_all(headers);
717 free(gzip_body);
718 return err;
721 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
723 const char *svc = rpc->service_name;
724 struct strbuf buf = STRBUF_INIT;
725 struct strbuf *preamble = rpc->stdin_preamble;
726 struct child_process client = CHILD_PROCESS_INIT;
727 int err = 0;
729 client.in = -1;
730 client.out = -1;
731 client.git_cmd = 1;
732 client.argv = rpc->argv;
733 if (start_command(&client))
734 exit(1);
735 if (preamble)
736 write_or_die(client.in, preamble->buf, preamble->len);
737 if (heads)
738 write_or_die(client.in, heads->buf, heads->len);
740 rpc->alloc = http_post_buffer;
741 rpc->buf = xmalloc(rpc->alloc);
742 rpc->in = client.in;
743 rpc->out = client.out;
744 strbuf_init(&rpc->result, 0);
746 strbuf_addf(&buf, "%s%s", url.buf, svc);
747 rpc->service_url = strbuf_detach(&buf, NULL);
749 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
750 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
752 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
753 rpc->hdr_accept = strbuf_detach(&buf, NULL);
755 while (!err) {
756 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
757 if (!n)
758 break;
759 rpc->pos = 0;
760 rpc->len = n;
761 err |= post_rpc(rpc);
764 close(client.in);
765 client.in = -1;
766 if (!err) {
767 strbuf_read(&rpc->result, client.out, 0);
768 } else {
769 char buf[4096];
770 for (;;)
771 if (xread(client.out, buf, sizeof(buf)) <= 0)
772 break;
775 close(client.out);
776 client.out = -1;
778 err |= finish_command(&client);
779 free(rpc->service_url);
780 free(rpc->hdr_content_type);
781 free(rpc->hdr_accept);
782 free(rpc->buf);
783 strbuf_release(&buf);
784 return err;
787 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
789 struct walker *walker;
790 char **targets;
791 int ret, i;
793 ALLOC_ARRAY(targets, nr_heads);
794 if (options.depth || options.deepen_since)
795 die("dumb http transport does not support shallow capabilities");
796 for (i = 0; i < nr_heads; i++)
797 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
799 walker = get_http_walker(url.buf);
800 walker->get_all = 1;
801 walker->get_tree = 1;
802 walker->get_history = 1;
803 walker->get_verbosely = options.verbosity >= 3;
804 walker->get_recover = 0;
805 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
806 walker_free(walker);
808 for (i = 0; i < nr_heads; i++)
809 free(targets[i]);
810 free(targets);
812 return ret ? error("fetch failed.") : 0;
815 static int fetch_git(struct discovery *heads,
816 int nr_heads, struct ref **to_fetch)
818 struct rpc_state rpc;
819 struct strbuf preamble = STRBUF_INIT;
820 int i, err;
821 struct argv_array args = ARGV_ARRAY_INIT;
823 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
824 "--stdin", "--lock-pack", NULL);
825 if (options.followtags)
826 argv_array_push(&args, "--include-tag");
827 if (options.thin)
828 argv_array_push(&args, "--thin");
829 if (options.verbosity >= 3)
830 argv_array_pushl(&args, "-v", "-v", NULL);
831 if (options.check_self_contained_and_connected)
832 argv_array_push(&args, "--check-self-contained-and-connected");
833 if (options.cloning)
834 argv_array_push(&args, "--cloning");
835 if (options.update_shallow)
836 argv_array_push(&args, "--update-shallow");
837 if (!options.progress)
838 argv_array_push(&args, "--no-progress");
839 if (options.depth)
840 argv_array_pushf(&args, "--depth=%lu", options.depth);
841 if (options.deepen_since)
842 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
843 for (i = 0; i < options.deepen_not.nr; i++)
844 argv_array_pushf(&args, "--shallow-exclude=%s",
845 options.deepen_not.items[i].string);
846 if (options.deepen_relative && options.depth)
847 argv_array_push(&args, "--deepen-relative");
848 if (options.from_promisor)
849 argv_array_push(&args, "--from-promisor");
850 if (options.no_dependents)
851 argv_array_push(&args, "--no-dependents");
852 if (options.filter)
853 argv_array_pushf(&args, "--filter=%s", options.filter);
854 argv_array_push(&args, url.buf);
856 for (i = 0; i < nr_heads; i++) {
857 struct ref *ref = to_fetch[i];
858 if (!*ref->name)
859 die("cannot fetch by sha1 over smart http");
860 packet_buf_write(&preamble, "%s %s\n",
861 oid_to_hex(&ref->old_oid), ref->name);
863 packet_buf_flush(&preamble);
865 memset(&rpc, 0, sizeof(rpc));
866 rpc.service_name = "git-upload-pack",
867 rpc.argv = args.argv;
868 rpc.stdin_preamble = &preamble;
869 rpc.gzip_request = 1;
871 err = rpc_service(&rpc, heads);
872 if (rpc.result.len)
873 write_or_die(1, rpc.result.buf, rpc.result.len);
874 strbuf_release(&rpc.result);
875 strbuf_release(&preamble);
876 argv_array_clear(&args);
877 return err;
880 static int fetch(int nr_heads, struct ref **to_fetch)
882 struct discovery *d = discover_refs("git-upload-pack", 0);
883 if (d->proto_git)
884 return fetch_git(d, nr_heads, to_fetch);
885 else
886 return fetch_dumb(nr_heads, to_fetch);
889 static void parse_fetch(struct strbuf *buf)
891 struct ref **to_fetch = NULL;
892 struct ref *list_head = NULL;
893 struct ref **list = &list_head;
894 int alloc_heads = 0, nr_heads = 0;
896 do {
897 const char *p;
898 if (skip_prefix(buf->buf, "fetch ", &p)) {
899 const char *name;
900 struct ref *ref;
901 struct object_id old_oid;
903 if (get_oid_hex(p, &old_oid))
904 die("protocol error: expected sha/ref, got %s'", p);
905 if (p[GIT_SHA1_HEXSZ] == ' ')
906 name = p + GIT_SHA1_HEXSZ + 1;
907 else if (!p[GIT_SHA1_HEXSZ])
908 name = "";
909 else
910 die("protocol error: expected sha/ref, got %s'", p);
912 ref = alloc_ref(name);
913 oidcpy(&ref->old_oid, &old_oid);
915 *list = ref;
916 list = &ref->next;
918 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
919 to_fetch[nr_heads++] = ref;
921 else
922 die("http transport does not support %s", buf->buf);
924 strbuf_reset(buf);
925 if (strbuf_getline_lf(buf, stdin) == EOF)
926 return;
927 if (!*buf->buf)
928 break;
929 } while (1);
931 if (fetch(nr_heads, to_fetch))
932 exit(128); /* error already reported */
933 free_refs(list_head);
934 free(to_fetch);
936 printf("\n");
937 fflush(stdout);
938 strbuf_reset(buf);
941 static int push_dav(int nr_spec, char **specs)
943 struct child_process child = CHILD_PROCESS_INIT;
944 size_t i;
946 child.git_cmd = 1;
947 argv_array_push(&child.args, "http-push");
948 argv_array_push(&child.args, "--helper-status");
949 if (options.dry_run)
950 argv_array_push(&child.args, "--dry-run");
951 if (options.verbosity > 1)
952 argv_array_push(&child.args, "--verbose");
953 argv_array_push(&child.args, url.buf);
954 for (i = 0; i < nr_spec; i++)
955 argv_array_push(&child.args, specs[i]);
957 if (run_command(&child))
958 die("git-http-push failed");
959 return 0;
962 static int push_git(struct discovery *heads, int nr_spec, char **specs)
964 struct rpc_state rpc;
965 int i, err;
966 struct argv_array args;
967 struct string_list_item *cas_option;
968 struct strbuf preamble = STRBUF_INIT;
970 argv_array_init(&args);
971 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
972 NULL);
974 if (options.thin)
975 argv_array_push(&args, "--thin");
976 if (options.dry_run)
977 argv_array_push(&args, "--dry-run");
978 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
979 argv_array_push(&args, "--signed=yes");
980 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
981 argv_array_push(&args, "--signed=if-asked");
982 if (options.verbosity == 0)
983 argv_array_push(&args, "--quiet");
984 else if (options.verbosity > 1)
985 argv_array_push(&args, "--verbose");
986 for (i = 0; i < options.push_options.nr; i++)
987 argv_array_pushf(&args, "--push-option=%s",
988 options.push_options.items[i].string);
989 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
990 for_each_string_list_item(cas_option, &cas_options)
991 argv_array_push(&args, cas_option->string);
992 argv_array_push(&args, url.buf);
994 argv_array_push(&args, "--stdin");
995 for (i = 0; i < nr_spec; i++)
996 packet_buf_write(&preamble, "%s\n", specs[i]);
997 packet_buf_flush(&preamble);
999 memset(&rpc, 0, sizeof(rpc));
1000 rpc.service_name = "git-receive-pack",
1001 rpc.argv = args.argv;
1002 rpc.stdin_preamble = &preamble;
1004 err = rpc_service(&rpc, heads);
1005 if (rpc.result.len)
1006 write_or_die(1, rpc.result.buf, rpc.result.len);
1007 strbuf_release(&rpc.result);
1008 strbuf_release(&preamble);
1009 argv_array_clear(&args);
1010 return err;
1013 static int push(int nr_spec, char **specs)
1015 struct discovery *heads = discover_refs("git-receive-pack", 1);
1016 int ret;
1018 if (heads->proto_git)
1019 ret = push_git(heads, nr_spec, specs);
1020 else
1021 ret = push_dav(nr_spec, specs);
1022 free_discovery(heads);
1023 return ret;
1026 static void parse_push(struct strbuf *buf)
1028 char **specs = NULL;
1029 int alloc_spec = 0, nr_spec = 0, i, ret;
1031 do {
1032 if (starts_with(buf->buf, "push ")) {
1033 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1034 specs[nr_spec++] = xstrdup(buf->buf + 5);
1036 else
1037 die("http transport does not support %s", buf->buf);
1039 strbuf_reset(buf);
1040 if (strbuf_getline_lf(buf, stdin) == EOF)
1041 goto free_specs;
1042 if (!*buf->buf)
1043 break;
1044 } while (1);
1046 ret = push(nr_spec, specs);
1047 printf("\n");
1048 fflush(stdout);
1050 if (ret)
1051 exit(128); /* error already reported */
1053 free_specs:
1054 for (i = 0; i < nr_spec; i++)
1055 free(specs[i]);
1056 free(specs);
1059 int cmd_main(int argc, const char **argv)
1061 struct strbuf buf = STRBUF_INIT;
1062 int nongit;
1064 setup_git_directory_gently(&nongit);
1065 if (argc < 2) {
1066 error("remote-curl: usage: git remote-curl <remote> [<url>]");
1067 return 1;
1070 options.verbosity = 1;
1071 options.progress = !!isatty(2);
1072 options.thin = 1;
1073 string_list_init(&options.deepen_not, 1);
1074 string_list_init(&options.push_options, 1);
1076 remote = remote_get(argv[1]);
1078 if (argc > 2) {
1079 end_url_with_slash(&url, argv[2]);
1080 } else {
1081 end_url_with_slash(&url, remote->url[0]);
1084 http_init(remote, url.buf, 0);
1086 do {
1087 const char *arg;
1089 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1090 if (ferror(stdin))
1091 error("remote-curl: error reading command stream from git");
1092 return 1;
1094 if (buf.len == 0)
1095 break;
1096 if (starts_with(buf.buf, "fetch ")) {
1097 if (nongit)
1098 die("remote-curl: fetch attempted without a local repo");
1099 parse_fetch(&buf);
1101 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1102 int for_push = !!strstr(buf.buf + 4, "for-push");
1103 output_refs(get_refs(for_push));
1105 } else if (starts_with(buf.buf, "push ")) {
1106 parse_push(&buf);
1108 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1109 char *value = strchr(arg, ' ');
1110 int result;
1112 if (value)
1113 *value++ = '\0';
1114 else
1115 value = "true";
1117 result = set_option(arg, value);
1118 if (!result)
1119 printf("ok\n");
1120 else if (result < 0)
1121 printf("error invalid value\n");
1122 else
1123 printf("unsupported\n");
1124 fflush(stdout);
1126 } else if (!strcmp(buf.buf, "capabilities")) {
1127 printf("fetch\n");
1128 printf("option\n");
1129 printf("push\n");
1130 printf("check-connectivity\n");
1131 printf("\n");
1132 fflush(stdout);
1133 } else {
1134 error("remote-curl: unknown command '%s' from git", buf.buf);
1135 return 1;
1137 strbuf_reset(&buf);
1138 } while (1);
1140 http_cleanup();
1142 return 0;