1f0161475deef7be7468df7c484e233c1b6221b3
1#include "cache.h"
2#include "config.h"
3#include "remote.h"
4#include "connect.h"
5#include "strbuf.h"
6#include "walker.h"
7#include "http.h"
8#include "exec-cmd.h"
9#include "run-command.h"
10#include "pkt-line.h"
11#include "string-list.h"
12#include "sideband.h"
13#include "argv-array.h"
14#include "credential.h"
15#include "sha1-array.h"
16#include "send-pack.h"
17#include "protocol.h"
18#include "quote.h"
19static struct remote *remote;
21/* always ends with a trailing slash */
22static struct strbuf url = STRBUF_INIT;
23struct options {
25 int verbosity;
26 unsigned long depth;
27 char *deepen_since;
28 struct string_list deepen_not;
29 struct string_list push_options;
30 char *filter;
31 unsigned progress : 1,
32 check_self_contained_and_connected : 1,
33 cloning : 1,
34 update_shallow : 1,
35 followtags : 1,
36 dry_run : 1,
37 thin : 1,
38 /* One of the SEND_PACK_PUSH_CERT_* constants. */
39 push_cert : 2,
40 deepen_relative : 1,
41 from_promisor : 1,
42 no_dependents : 1;
43};
44static struct options options;
45static struct string_list cas_options = STRING_LIST_INIT_DUP;
46static int set_option(const char *name, const char *value)
48{
49 if (!strcmp(name, "verbosity")) {
50 char *end;
51 int v = strtol(value, &end, 10);
52 if (value == end || *end)
53 return -1;
54 options.verbosity = v;
55 return 0;
56 }
57 else if (!strcmp(name, "progress")) {
58 if (!strcmp(value, "true"))
59 options.progress = 1;
60 else if (!strcmp(value, "false"))
61 options.progress = 0;
62 else
63 return -1;
64 return 0;
65 }
66 else if (!strcmp(name, "depth")) {
67 char *end;
68 unsigned long v = strtoul(value, &end, 10);
69 if (value == end || *end)
70 return -1;
71 options.depth = v;
72 return 0;
73 }
74 else if (!strcmp(name, "deepen-since")) {
75 options.deepen_since = xstrdup(value);
76 return 0;
77 }
78 else if (!strcmp(name, "deepen-not")) {
79 string_list_append(&options.deepen_not, value);
80 return 0;
81 }
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;
87 else
88 return -1;
89 return 0;
90 }
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;
96 else
97 return -1;
98 return 0;
99 }
100 else if (!strcmp(name, "dry-run")) {
101 if (!strcmp(value, "true"))
102 options.dry_run = 1;
103 else if (!strcmp(value, "false"))
104 options.dry_run = 0;
105 else
106 return -1;
107 return 0;
108 }
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;
114 else
115 return -1;
116 return 0;
117 }
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);
123 return 0;
124 } else if (!strcmp(name, "cloning")) {
125 if (!strcmp(value, "true"))
126 options.cloning = 1;
127 else if (!strcmp(value, "false"))
128 options.cloning = 0;
129 else
130 return -1;
131 return 0;
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;
137 else
138 return -1;
139 return 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;
147 else
148 return -1;
149 return 0;
150 } else if (!strcmp(name, "push-option")) {
151 if (*value != '"')
152 string_list_append(&options.push_options, value);
153 else {
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));
159 }
160 return 0;
161#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;
170 else
171 return -1;
172 return 0;
173#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
174 } else if (!strcmp(name, "from-promisor")) {
175 options.from_promisor = 1;
176 return 0;
177 } else if (!strcmp(name, "no-dependents")) {
178 options.no_dependents = 1;
179 return 0;
180 } else if (!strcmp(name, "filter")) {
181 options.filter = xstrdup(value);
182 return 0;
183 } else {
184 return 1 /* unsupported */;
185 }
186}
187struct discovery {
189 char *service;
190 char *buf_alloc;
191 char *buf;
192 size_t len;
193 struct ref *refs;
194 struct oid_array shallow;
195 enum protocol_version version;
196 unsigned proto_git : 1;
197};
198static struct discovery *last_discovery;
199static struct ref *parse_git_refs(struct discovery *heads, int for_push)
201{
202 struct ref *list = NULL;
203 struct packet_reader reader;
204 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);
209 heads->version = discover_version(&reader);
211 switch (heads->version) {
212 case protocol_v2:
213 /*
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.
218 */
219 break;
220 case protocol_v1:
221 case protocol_v0:
222 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
223 NULL, &heads->shallow);
224 break;
225 case protocol_unknown_version:
226 BUG("unknown protocol version");
227 }
228 return list;
230}
231static struct ref *parse_info_refs(struct discovery *heads)
233{
234 char *data, *start, *mid;
235 char *ref_name;
236 int i = 0;
237 struct ref *refs = NULL;
239 struct ref *ref = NULL;
240 struct ref *last_ref = NULL;
241 data = heads->buf;
243 start = NULL;
244 mid = data;
245 while (i < heads->len) {
246 if (!start) {
247 start = &data[i];
248 }
249 if (data[i] == '\t')
250 mid = &data[i];
251 if (data[i] == '\n') {
252 if (mid - start != 40)
253 die("%sinfo/refs not valid: is this a git repository?",
254 url.buf);
255 data[i] = 0;
256 ref_name = mid + 1;
257 ref = alloc_ref(ref_name);
258 get_oid_hex(start, &ref->old_oid);
259 if (!refs)
260 refs = ref;
261 if (last_ref)
262 last_ref->next = ref;
263 last_ref = ref;
264 start = NULL;
265 }
266 i++;
267 }
268 ref = alloc_ref("HEAD");
270 if (!http_fetch_ref(url.buf, ref) &&
271 !resolve_remote_symref(ref, refs)) {
272 ref->next = refs;
273 refs = ref;
274 } else {
275 free(ref);
276 }
277 return refs;
279}
280static void free_discovery(struct discovery *d)
282{
283 if (d) {
284 if (d == last_discovery)
285 last_discovery = NULL;
286 free(d->shallow.oid);
287 free(d->buf_alloc);
288 free_refs(d->refs);
289 free(d->service);
290 free(d);
291 }
292}
293static int show_http_message(struct strbuf *type, struct strbuf *charset,
295 struct strbuf *msg)
296{
297 const char *p, *eol;
298 /*
300 * We only show text/plain parts, as other types are likely
301 * to be ugly to look at on the user's terminal.
302 */
303 if (strcmp(type->buf, "text/plain"))
304 return -1;
305 if (charset->len)
306 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
307 strbuf_trim(msg);
309 if (!msg->len)
310 return -1;
311 p = msg->buf;
313 do {
314 eol = strchrnul(p, '\n');
315 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
316 p = eol + 1;
317 } while(*eol);
318 return 0;
319}
320static int get_protocol_http_header(enum protocol_version version,
322 struct strbuf *header)
323{
324 if (version > 0) {
325 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
326 version);
327 return 1;
329 }
330 return 0;
332}
333static void check_smart_http(struct discovery *d, const char *service,
335 struct strbuf *type)
336{
337 const char *p;
338 struct packet_reader reader;
339 /*
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.
344 */
345 if (!skip_prefix(type->buf, "application/x-", &p) ||
346 !skip_prefix(p, service, &p) ||
347 strcmp(p, "-advertisement"))
348 return;
349 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");
355 if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
357 /*
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.
361 */
362 for (;;) {
363 packet_reader_read(&reader);
364 if (reader.pktlen <= 0) {
365 break;
366 }
367 }
368 /*
370 * v0 smart http; callers expect us to soak up the
371 * service and header packets
372 */
373 d->buf = reader.src_buffer;
374 d->len = reader.src_len;
375 d->proto_git = 1;
376 } else if (!strcmp(reader.line, "version 2")) {
378 /*
379 * v2 smart http; do not consume version packet, which will
380 * be handled elsewhere.
381 */
382 d->proto_git = 1;
383 } else {
385 die("invalid server response; got '%s'", reader.line);
386 }
387}
388static struct discovery *discover_refs(const char *service, int for_push)
390{
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();
402 if (last && !strcmp(service, last->service))
404 return last;
405 free_discovery(last);
406 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)) {
410 maybe_smart = 1;
411 if (!strchr(url.buf, '?'))
412 strbuf_addch(&refs_url, '?');
413 else
414 strbuf_addch(&refs_url, '&');
415 strbuf_addf(&refs_url, "service=%s", service);
416 }
417 /*
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.
422 */
423 if (version == protocol_v2 && !strcmp("git-receive-pack", service))
424 version = protocol_v0;
425 /* Add the extra Git-Protocol header */
427 if (get_protocol_http_header(version, &protocol_header))
428 string_list_append(&extra_headers, protocol_header.buf);
429 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;
438 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
440 switch (http_ret) {
441 case HTTP_OK:
442 break;
443 case HTTP_MISSING_TARGET:
444 show_http_message(&type, &charset, &buffer);
445 die("repository '%s' not found", url.buf);
446 case HTTP_NOAUTH:
447 show_http_message(&type, &charset, &buffer);
448 die("Authentication failed for '%s'", url.buf);
449 default:
450 show_http_message(&type, &charset, &buffer);
451 die("unable to access '%s': %s", url.buf, curl_errorstr);
452 }
453 if (options.verbosity && !starts_with(refs_url.buf, url.buf))
455 warning(_("redirecting to %s"), url.buf);
456 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;
461 if (maybe_smart)
463 check_smart_http(last, service, &type);
464 if (last->proto_git)
466 last->refs = parse_git_refs(last, for_push);
467 else
468 last->refs = parse_info_refs(last);
469 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;
478 return last;
479}
480static struct ref *get_refs(int for_push)
482{
483 struct discovery *heads;
484 if (for_push)
486 heads = discover_refs("git-receive-pack", for_push);
487 else
488 heads = discover_refs("git-upload-pack", for_push);
489 return heads->refs;
491}
492static void output_refs(struct ref *refs)
494{
495 struct ref *posn;
496 for (posn = refs; posn; posn = posn->next) {
497 if (posn->symref)
498 printf("@%s %s\n", posn->symref, posn->name);
499 else
500 printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
501 }
502 printf("\n");
503 fflush(stdout);
504}
505struct rpc_state {
507 const char *service_name;
508 char *service_url;
509 char *hdr_content_type;
510 char *hdr_accept;
511 char *protocol_header;
512 char *buf;
513 size_t alloc;
514 size_t len;
515 size_t pos;
516 int in;
517 int out;
518 int any_written;
519 unsigned gzip_request : 1;
520 unsigned initial_buffer : 1;
521};
522/*
524 * Appends the result of reading from rpc->out to the string represented by
525 * rpc->buf and rpc->len if there is enough space. Returns 1 if there was
526 * enough space, 0 otherwise.
527 *
528 * Writes the number of bytes appended into appended.
529 */
530static int rpc_read_from_out(struct rpc_state *rpc, size_t *appended) {
531 size_t left = rpc->alloc - rpc->len;
532 char *buf = rpc->buf + rpc->len;
533 if (left < LARGE_PACKET_MAX)
535 return 0;
536 *appended = packet_read(rpc->out, NULL, NULL, buf, left, 0);
538 rpc->len += *appended;
539 return 1;
540}
541static size_t rpc_out(void *ptr, size_t eltsize,
543 size_t nmemb, void *buffer_)
544{
545 size_t max = eltsize * nmemb;
546 struct rpc_state *rpc = buffer_;
547 size_t avail = rpc->len - rpc->pos;
548 if (!avail) {
550 rpc->initial_buffer = 0;
551 rpc->len = 0;
552 if (!rpc_read_from_out(rpc, &avail))
553 BUG("The entire rpc->buf should be larger than LARGE_PACKET_DATA_MAX");
554 if (!avail)
555 return 0;
556 rpc->pos = 0;
557 }
558 if (max < avail)
560 avail = max;
561 memcpy(ptr, rpc->buf + rpc->pos, avail);
562 rpc->pos += avail;
563 return avail;
564}
565#ifndef NO_CURL_IOCTL
567static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
568{
569 struct rpc_state *rpc = clientp;
570 switch (cmd) {
572 case CURLIOCMD_NOP:
573 return CURLIOE_OK;
574 case CURLIOCMD_RESTARTREAD:
576 if (rpc->initial_buffer) {
577 rpc->pos = 0;
578 return CURLIOE_OK;
579 }
580 error("unable to rewind rpc post data - try increasing http.postBuffer");
581 return CURLIOE_FAILRESTART;
582 default:
584 return CURLIOE_UNKNOWNCMD;
585 }
586}
587#endif
588struct rpc_in_data {
590 struct rpc_state *rpc;
591 struct active_request_slot *slot;
592};
593/*
595 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
596 * from ptr.
597 */
598static size_t rpc_in(char *ptr, size_t eltsize,
599 size_t nmemb, void *buffer_)
600{
601 size_t size = eltsize * nmemb;
602 struct rpc_in_data *data = buffer_;
603 long response_code;
604 if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
606 &response_code) != CURLE_OK)
607 return size;
608 if (response_code >= 300)
609 return size;
610 if (size)
611 data->rpc->any_written = 1;
612 write_or_die(data->rpc->in, ptr, size);
613 return size;
614}
615static int run_slot(struct active_request_slot *slot,
617 struct slot_results *results)
618{
619 int err;
620 struct slot_results results_buf;
621 if (!results)
623 results = &results_buf;
624 err = run_one_slot(slot, results);
626 if (err != HTTP_OK && err != HTTP_REAUTH) {
628 struct strbuf msg = STRBUF_INIT;
629 if (results->http_code && results->http_code != 200)
630 strbuf_addf(&msg, "HTTP %ld", results->http_code);
631 if (results->curl_result != CURLE_OK) {
632 if (msg.len)
633 strbuf_addch(&msg, ' ');
634 strbuf_addf(&msg, "curl %d", results->curl_result);
635 if (curl_errorstr[0]) {
636 strbuf_addch(&msg, ' ');
637 strbuf_addstr(&msg, curl_errorstr);
638 }
639 }
640 error("RPC failed; %s", msg.buf);
641 strbuf_release(&msg);
642 }
643 return err;
645}
646static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
648{
649 struct active_request_slot *slot;
650 struct curl_slist *headers = http_copy_default_headers();
651 struct strbuf buf = STRBUF_INIT;
652 int err;
653 slot = get_active_slot();
655 headers = curl_slist_append(headers, rpc->hdr_content_type);
657 headers = curl_slist_append(headers, rpc->hdr_accept);
658 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
660 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
661 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
662 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
663 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
664 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
665 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
666 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
667 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
668 err = run_slot(slot, results);
670 curl_slist_free_all(headers);
672 strbuf_release(&buf);
673 return err;
674}
675static curl_off_t xcurl_off_t(size_t len)
677{
678 uintmax_t size = len;
679 if (size > maximum_signed_value_of_type(curl_off_t))
680 die("cannot handle pushes this big");
681 return (curl_off_t)size;
682}
683static int post_rpc(struct rpc_state *rpc)
685{
686 struct active_request_slot *slot;
687 struct curl_slist *headers = http_copy_default_headers();
688 int use_gzip = rpc->gzip_request;
689 char *gzip_body = NULL;
690 size_t gzip_size = 0;
691 int err, large_request = 0;
692 int needs_100_continue = 0;
693 struct rpc_in_data rpc_in_data;
694 /* Try to load the entire request, if we can fit it into the
696 * allocated buffer space we can use HTTP/1.0 and avoid the
697 * chunked encoding mess.
698 */
699 while (1) {
700 size_t n;
701 if (!rpc_read_from_out(rpc, &n)) {
703 large_request = 1;
704 use_gzip = 0;
705 break;
706 }
707 if (!n)
708 break;
709 }
710 if (large_request) {
712 struct slot_results results;
713 do {
715 err = probe_rpc(rpc, &results);
716 if (err == HTTP_REAUTH)
717 credential_fill(&http_auth);
718 } while (err == HTTP_REAUTH);
719 if (err != HTTP_OK)
720 return -1;
721 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
723 needs_100_continue = 1;
724 }
725 headers = curl_slist_append(headers, rpc->hdr_content_type);
727 headers = curl_slist_append(headers, rpc->hdr_accept);
728 headers = curl_slist_append(headers, needs_100_continue ?
729 "Expect: 100-continue" : "Expect:");
730 /* Add the extra Git-Protocol header */
732 if (rpc->protocol_header)
733 headers = curl_slist_append(headers, rpc->protocol_header);
734retry:
736 slot = get_active_slot();
737 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
739 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
740 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
741 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
742 if (large_request) {
744 /* The request body is large and the size cannot be predicted.
745 * We must use chunked encoding to send it.
746 */
747 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
748 rpc->initial_buffer = 1;
749 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
750 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
751#ifndef NO_CURL_IOCTL
752 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
753 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
754#endif
755 if (options.verbosity > 1) {
756 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
757 fflush(stderr);
758 }
759 } else if (gzip_body) {
761 /*
762 * If we are looping to retry authentication, then the previous
763 * run will have set up the headers and gzip buffer already,
764 * and we just need to send it.
765 */
766 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
767 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
768 } else if (use_gzip && 1024 < rpc->len) {
770 /* The client backend isn't giving us compressed data so
771 * we can try to deflate it ourselves, this may save on
772 * the transfer time.
773 */
774 git_zstream stream;
775 int ret;
776 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
778 gzip_size = git_deflate_bound(&stream, rpc->len);
779 gzip_body = xmalloc(gzip_size);
780 stream.next_in = (unsigned char *)rpc->buf;
782 stream.avail_in = rpc->len;
783 stream.next_out = (unsigned char *)gzip_body;
784 stream.avail_out = gzip_size;
785 ret = git_deflate(&stream, Z_FINISH);
787 if (ret != Z_STREAM_END)
788 die("cannot deflate request; zlib deflate error %d", ret);
789 ret = git_deflate_end_gently(&stream);
791 if (ret != Z_OK)
792 die("cannot deflate request; zlib end error %d", ret);
793 gzip_size = stream.total_out;
795 headers = curl_slist_append(headers, "Content-Encoding: gzip");
797 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
798 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
799 if (options.verbosity > 1) {
801 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
802 rpc->service_name,
803 (unsigned long)rpc->len, (unsigned long)gzip_size);
804 fflush(stderr);
805 }
806 } else {
807 /* We know the complete request size in advance, use the
808 * more normal Content-Length approach.
809 */
810 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
811 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
812 if (options.verbosity > 1) {
813 fprintf(stderr, "POST %s (%lu bytes)\n",
814 rpc->service_name, (unsigned long)rpc->len);
815 fflush(stderr);
816 }
817 }
818 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
820 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
821 rpc_in_data.rpc = rpc;
822 rpc_in_data.slot = slot;
823 curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
824 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
825 rpc->any_written = 0;
828 err = run_slot(slot, NULL);
829 if (err == HTTP_REAUTH && !large_request) {
830 credential_fill(&http_auth);
831 goto retry;
832 }
833 if (err != HTTP_OK)
834 err = -1;
835 if (!rpc->any_written)
837 err = -1;
838 curl_slist_free_all(headers);
840 free(gzip_body);
841 return err;
842}
843static int rpc_service(struct rpc_state *rpc, struct discovery *heads,
845 const char **client_argv, const struct strbuf *preamble,
846 struct strbuf *rpc_result)
847{
848 const char *svc = rpc->service_name;
849 struct strbuf buf = STRBUF_INIT;
850 struct child_process client = CHILD_PROCESS_INIT;
851 int err = 0;
852 client.in = -1;
854 client.out = -1;
855 client.git_cmd = 1;
856 client.argv = client_argv;
857 if (start_command(&client))
858 exit(1);
859 write_or_die(client.in, preamble->buf, preamble->len);
860 if (heads)
861 write_or_die(client.in, heads->buf, heads->len);
862 rpc->alloc = http_post_buffer;
864 rpc->buf = xmalloc(rpc->alloc);
865 rpc->in = client.in;
866 rpc->out = client.out;
867 strbuf_addf(&buf, "%s%s", url.buf, svc);
869 rpc->service_url = strbuf_detach(&buf, NULL);
870 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
872 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
873 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
875 rpc->hdr_accept = strbuf_detach(&buf, NULL);
876 if (get_protocol_http_header(heads->version, &buf))
878 rpc->protocol_header = strbuf_detach(&buf, NULL);
879 else
880 rpc->protocol_header = NULL;
881 while (!err) {
883 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
884 if (!n)
885 break;
886 rpc->pos = 0;
887 rpc->len = n;
888 err |= post_rpc(rpc);
889 }
890 close(client.in);
892 client.in = -1;
893 if (!err) {
894 strbuf_read(rpc_result, client.out, 0);
895 } else {
896 char buf[4096];
897 for (;;)
898 if (xread(client.out, buf, sizeof(buf)) <= 0)
899 break;
900 }
901 close(client.out);
903 client.out = -1;
904 err |= finish_command(&client);
906 free(rpc->service_url);
907 free(rpc->hdr_content_type);
908 free(rpc->hdr_accept);
909 free(rpc->protocol_header);
910 free(rpc->buf);
911 strbuf_release(&buf);
912 return err;
913}
914static int fetch_dumb(int nr_heads, struct ref **to_fetch)
916{
917 struct walker *walker;
918 char **targets;
919 int ret, i;
920 ALLOC_ARRAY(targets, nr_heads);
922 if (options.depth || options.deepen_since)
923 die("dumb http transport does not support shallow capabilities");
924 for (i = 0; i < nr_heads; i++)
925 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
926 walker = get_http_walker(url.buf);
928 walker->get_verbosely = options.verbosity >= 3;
929 walker->get_recover = 0;
930 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
931 walker_free(walker);
932 for (i = 0; i < nr_heads; i++)
934 free(targets[i]);
935 free(targets);
936 return ret ? error("fetch failed.") : 0;
938}
939static int fetch_git(struct discovery *heads,
941 int nr_heads, struct ref **to_fetch)
942{
943 struct rpc_state rpc;
944 struct strbuf preamble = STRBUF_INIT;
945 int i, err;
946 struct argv_array args = ARGV_ARRAY_INIT;
947 struct strbuf rpc_result = STRBUF_INIT;
948 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
950 "--stdin", "--lock-pack", NULL);
951 if (options.followtags)
952 argv_array_push(&args, "--include-tag");
953 if (options.thin)
954 argv_array_push(&args, "--thin");
955 if (options.verbosity >= 3)
956 argv_array_pushl(&args, "-v", "-v", NULL);
957 if (options.check_self_contained_and_connected)
958 argv_array_push(&args, "--check-self-contained-and-connected");
959 if (options.cloning)
960 argv_array_push(&args, "--cloning");
961 if (options.update_shallow)
962 argv_array_push(&args, "--update-shallow");
963 if (!options.progress)
964 argv_array_push(&args, "--no-progress");
965 if (options.depth)
966 argv_array_pushf(&args, "--depth=%lu", options.depth);
967 if (options.deepen_since)
968 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
969 for (i = 0; i < options.deepen_not.nr; i++)
970 argv_array_pushf(&args, "--shallow-exclude=%s",
971 options.deepen_not.items[i].string);
972 if (options.deepen_relative && options.depth)
973 argv_array_push(&args, "--deepen-relative");
974 if (options.from_promisor)
975 argv_array_push(&args, "--from-promisor");
976 if (options.no_dependents)
977 argv_array_push(&args, "--no-dependents");
978 if (options.filter)
979 argv_array_pushf(&args, "--filter=%s", options.filter);
980 argv_array_push(&args, url.buf);
981 for (i = 0; i < nr_heads; i++) {
983 struct ref *ref = to_fetch[i];
984 if (!*ref->name)
985 die("cannot fetch by sha1 over smart http");
986 packet_buf_write(&preamble, "%s %s\n",
987 oid_to_hex(&ref->old_oid), ref->name);
988 }
989 packet_buf_flush(&preamble);
990 memset(&rpc, 0, sizeof(rpc));
992 rpc.service_name = "git-upload-pack",
993 rpc.gzip_request = 1;
994 err = rpc_service(&rpc, heads, args.argv, &preamble, &rpc_result);
996 if (rpc_result.len)
997 write_or_die(1, rpc_result.buf, rpc_result.len);
998 strbuf_release(&rpc_result);
999 strbuf_release(&preamble);
1000 argv_array_clear(&args);
1001 return err;
1002}
1003static int fetch(int nr_heads, struct ref **to_fetch)
1005{
1006 struct discovery *d = discover_refs("git-upload-pack", 0);
1007 if (d->proto_git)
1008 return fetch_git(d, nr_heads, to_fetch);
1009 else
1010 return fetch_dumb(nr_heads, to_fetch);
1011}
1012static void parse_fetch(struct strbuf *buf)
1014{
1015 struct ref **to_fetch = NULL;
1016 struct ref *list_head = NULL;
1017 struct ref **list = &list_head;
1018 int alloc_heads = 0, nr_heads = 0;
1019 do {
1021 const char *p;
1022 if (skip_prefix(buf->buf, "fetch ", &p)) {
1023 const char *name;
1024 struct ref *ref;
1025 struct object_id old_oid;
1026 if (get_oid_hex(p, &old_oid))
1028 die("protocol error: expected sha/ref, got %s'", p);
1029 if (p[GIT_SHA1_HEXSZ] == ' ')
1030 name = p + GIT_SHA1_HEXSZ + 1;
1031 else if (!p[GIT_SHA1_HEXSZ])
1032 name = "";
1033 else
1034 die("protocol error: expected sha/ref, got %s'", p);
1035 ref = alloc_ref(name);
1037 oidcpy(&ref->old_oid, &old_oid);
1038 *list = ref;
1040 list = &ref->next;
1041 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1043 to_fetch[nr_heads++] = ref;
1044 }
1045 else
1046 die("http transport does not support %s", buf->buf);
1047 strbuf_reset(buf);
1049 if (strbuf_getline_lf(buf, stdin) == EOF)
1050 return;
1051 if (!*buf->buf)
1052 break;
1053 } while (1);
1054 if (fetch(nr_heads, to_fetch))
1056 exit(128); /* error already reported */
1057 free_refs(list_head);
1058 free(to_fetch);
1059 printf("\n");
1061 fflush(stdout);
1062 strbuf_reset(buf);
1063}
1064static int push_dav(int nr_spec, char **specs)
1066{
1067 struct child_process child = CHILD_PROCESS_INIT;
1068 size_t i;
1069 child.git_cmd = 1;
1071 argv_array_push(&child.args, "http-push");
1072 argv_array_push(&child.args, "--helper-status");
1073 if (options.dry_run)
1074 argv_array_push(&child.args, "--dry-run");
1075 if (options.verbosity > 1)
1076 argv_array_push(&child.args, "--verbose");
1077 argv_array_push(&child.args, url.buf);
1078 for (i = 0; i < nr_spec; i++)
1079 argv_array_push(&child.args, specs[i]);
1080 if (run_command(&child))
1082 die("git-http-push failed");
1083 return 0;
1084}
1085static int push_git(struct discovery *heads, int nr_spec, char **specs)
1087{
1088 struct rpc_state rpc;
1089 int i, err;
1090 struct argv_array args;
1091 struct string_list_item *cas_option;
1092 struct strbuf preamble = STRBUF_INIT;
1093 struct strbuf rpc_result = STRBUF_INIT;
1094 argv_array_init(&args);
1096 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1097 NULL);
1098 if (options.thin)
1100 argv_array_push(&args, "--thin");
1101 if (options.dry_run)
1102 argv_array_push(&args, "--dry-run");
1103 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1104 argv_array_push(&args, "--signed=yes");
1105 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1106 argv_array_push(&args, "--signed=if-asked");
1107 if (options.verbosity == 0)
1108 argv_array_push(&args, "--quiet");
1109 else if (options.verbosity > 1)
1110 argv_array_push(&args, "--verbose");
1111 for (i = 0; i < options.push_options.nr; i++)
1112 argv_array_pushf(&args, "--push-option=%s",
1113 options.push_options.items[i].string);
1114 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
1115 for_each_string_list_item(cas_option, &cas_options)
1116 argv_array_push(&args, cas_option->string);
1117 argv_array_push(&args, url.buf);
1118 argv_array_push(&args, "--stdin");
1120 for (i = 0; i < nr_spec; i++)
1121 packet_buf_write(&preamble, "%s\n", specs[i]);
1122 packet_buf_flush(&preamble);
1123 memset(&rpc, 0, sizeof(rpc));
1125 rpc.service_name = "git-receive-pack",
1126 err = rpc_service(&rpc, heads, args.argv, &preamble, &rpc_result);
1128 if (rpc_result.len)
1129 write_or_die(1, rpc_result.buf, rpc_result.len);
1130 strbuf_release(&rpc_result);
1131 strbuf_release(&preamble);
1132 argv_array_clear(&args);
1133 return err;
1134}
1135static int push(int nr_spec, char **specs)
1137{
1138 struct discovery *heads = discover_refs("git-receive-pack", 1);
1139 int ret;
1140 if (heads->proto_git)
1142 ret = push_git(heads, nr_spec, specs);
1143 else
1144 ret = push_dav(nr_spec, specs);
1145 free_discovery(heads);
1146 return ret;
1147}
1148static void parse_push(struct strbuf *buf)
1150{
1151 char **specs = NULL;
1152 int alloc_spec = 0, nr_spec = 0, i, ret;
1153 do {
1155 if (starts_with(buf->buf, "push ")) {
1156 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1157 specs[nr_spec++] = xstrdup(buf->buf + 5);
1158 }
1159 else
1160 die("http transport does not support %s", buf->buf);
1161 strbuf_reset(buf);
1163 if (strbuf_getline_lf(buf, stdin) == EOF)
1164 goto free_specs;
1165 if (!*buf->buf)
1166 break;
1167 } while (1);
1168 ret = push(nr_spec, specs);
1170 printf("\n");
1171 fflush(stdout);
1172 if (ret)
1174 exit(128); /* error already reported */
1175 free_specs:
1177 for (i = 0; i < nr_spec; i++)
1178 free(specs[i]);
1179 free(specs);
1180}
1181/*
1183 * Used to represent the state of a connection to an HTTP server when
1184 * communicating using git's wire-protocol version 2.
1185 */
1186struct proxy_state {
1187 char *service_name;
1188 char *service_url;
1189 struct curl_slist *headers;
1190 struct strbuf request_buffer;
1191 int in;
1192 int out;
1193 struct packet_reader reader;
1194 size_t pos;
1195 int seen_flush;
1196};
1197static void proxy_state_init(struct proxy_state *p, const char *service_name,
1199 enum protocol_version version)
1200{
1201 struct strbuf buf = STRBUF_INIT;
1202 memset(p, 0, sizeof(*p));
1204 p->service_name = xstrdup(service_name);
1205 p->in = 0;
1207 p->out = 1;
1208 strbuf_init(&p->request_buffer, 0);
1209 strbuf_addf(&buf, "%s%s", url.buf, p->service_name);
1211 p->service_url = strbuf_detach(&buf, NULL);
1212 p->headers = http_copy_default_headers();
1214 strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name);
1216 p->headers = curl_slist_append(p->headers, buf.buf);
1217 strbuf_reset(&buf);
1218 strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name);
1220 p->headers = curl_slist_append(p->headers, buf.buf);
1221 strbuf_reset(&buf);
1222 p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked");
1224 /* Add the Git-Protocol header */
1226 if (get_protocol_http_header(version, &buf))
1227 p->headers = curl_slist_append(p->headers, buf.buf);
1228 packet_reader_init(&p->reader, p->in, NULL, 0,
1230 PACKET_READ_GENTLE_ON_EOF |
1231 PACKET_READ_DIE_ON_ERR_PACKET);
1232 strbuf_release(&buf);
1234}
1235static void proxy_state_clear(struct proxy_state *p)
1237{
1238 free(p->service_name);
1239 free(p->service_url);
1240 curl_slist_free_all(p->headers);
1241 strbuf_release(&p->request_buffer);
1242}
1243/*
1245 * CURLOPT_READFUNCTION callback function.
1246 * Attempts to copy over a single packet-line at a time into the
1247 * curl provided buffer.
1248 */
1249static size_t proxy_in(char *buffer, size_t eltsize,
1250 size_t nmemb, void *userdata)
1251{
1252 size_t max;
1253 struct proxy_state *p = userdata;
1254 size_t avail = p->request_buffer.len - p->pos;
1255 if (eltsize != 1)
1258 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1259 (uintmax_t)eltsize);
1260 max = nmemb;
1261 if (!avail) {
1263 if (p->seen_flush) {
1264 p->seen_flush = 0;
1265 return 0;
1266 }
1267 strbuf_reset(&p->request_buffer);
1269 switch (packet_reader_read(&p->reader)) {
1270 case PACKET_READ_EOF:
1271 die("unexpected EOF when reading from parent process");
1272 case PACKET_READ_NORMAL:
1273 packet_buf_write_len(&p->request_buffer, p->reader.line,
1274 p->reader.pktlen);
1275 break;
1276 case PACKET_READ_DELIM:
1277 packet_buf_delim(&p->request_buffer);
1278 break;
1279 case PACKET_READ_FLUSH:
1280 packet_buf_flush(&p->request_buffer);
1281 p->seen_flush = 1;
1282 break;
1283 }
1284 p->pos = 0;
1285 avail = p->request_buffer.len;
1286 }
1287 if (max < avail)
1289 avail = max;
1290 memcpy(buffer, p->request_buffer.buf + p->pos, avail);
1291 p->pos += avail;
1292 return avail;
1293}
1294static size_t proxy_out(char *buffer, size_t eltsize,
1296 size_t nmemb, void *userdata)
1297{
1298 size_t size;
1299 struct proxy_state *p = userdata;
1300 if (eltsize != 1)
1302 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1303 (uintmax_t)eltsize);
1304 size = nmemb;
1305 write_or_die(p->out, buffer, size);
1307 return size;
1308}
1309/* Issues a request to the HTTP server configured in `p` */
1311static int proxy_request(struct proxy_state *p)
1312{
1313 struct active_request_slot *slot;
1314 slot = get_active_slot();
1316 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1318 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1319 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
1320 curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url);
1321 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers);
1322 /* Setup function to read request from client */
1324 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in);
1325 curl_easy_setopt(slot->curl, CURLOPT_READDATA, p);
1326 /* Setup function to write server response to client */
1328 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out);
1329 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p);
1330 if (run_slot(slot, NULL) != HTTP_OK)
1332 return -1;
1333 return 0;
1335}
1336static int stateless_connect(const char *service_name)
1338{
1339 struct discovery *discover;
1340 struct proxy_state p;
1341 /*
1343 * Run the info/refs request and see if the server supports protocol
1344 * v2. If and only if the server supports v2 can we successfully
1345 * establish a stateless connection, otherwise we need to tell the
1346 * client to fallback to using other transport helper functions to
1347 * complete their request.
1348 */
1349 discover = discover_refs(service_name, 0);
1350 if (discover->version != protocol_v2) {
1351 printf("fallback\n");
1352 fflush(stdout);
1353 return -1;
1354 } else {
1355 /* Stateless Connection established */
1356 printf("\n");
1357 fflush(stdout);
1358 }
1359 proxy_state_init(&p, service_name, discover->version);
1361 /*
1363 * Dump the capability listing that we got from the server earlier
1364 * during the info/refs request.
1365 */
1366 write_or_die(p.out, discover->buf, discover->len);
1367 /* Peek the next packet line. Until we see EOF keep sending POSTs */
1369 while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) {
1370 if (proxy_request(&p)) {
1371 /* We would have an err here */
1372 break;
1373 }
1374 }
1375 proxy_state_clear(&p);
1377 return 0;
1378}
1379int cmd_main(int argc, const char **argv)
1381{
1382 struct strbuf buf = STRBUF_INIT;
1383 int nongit;
1384 setup_git_directory_gently(&nongit);
1386 if (argc < 2) {
1387 error("remote-curl: usage: git remote-curl <remote> [<url>]");
1388 return 1;
1389 }
1390 options.verbosity = 1;
1392 options.progress = !!isatty(2);
1393 options.thin = 1;
1394 string_list_init(&options.deepen_not, 1);
1395 string_list_init(&options.push_options, 1);
1396 remote = remote_get(argv[1]);
1398 if (argc > 2) {
1400 end_url_with_slash(&url, argv[2]);
1401 } else {
1402 end_url_with_slash(&url, remote->url[0]);
1403 }
1404 http_init(remote, url.buf, 0);
1406 do {
1408 const char *arg;
1409 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1411 if (ferror(stdin))
1412 error("remote-curl: error reading command stream from git");
1413 return 1;
1414 }
1415 if (buf.len == 0)
1416 break;
1417 if (starts_with(buf.buf, "fetch ")) {
1418 if (nongit)
1419 die("remote-curl: fetch attempted without a local repo");
1420 parse_fetch(&buf);
1421 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1423 int for_push = !!strstr(buf.buf + 4, "for-push");
1424 output_refs(get_refs(for_push));
1425 } else if (starts_with(buf.buf, "push ")) {
1427 parse_push(&buf);
1428 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1430 char *value = strchr(arg, ' ');
1431 int result;
1432 if (value)
1434 *value++ = '\0';
1435 else
1436 value = "true";
1437 result = set_option(arg, value);
1439 if (!result)
1440 printf("ok\n");
1441 else if (result < 0)
1442 printf("error invalid value\n");
1443 else
1444 printf("unsupported\n");
1445 fflush(stdout);
1446 } else if (!strcmp(buf.buf, "capabilities")) {
1448 printf("stateless-connect\n");
1449 printf("fetch\n");
1450 printf("option\n");
1451 printf("push\n");
1452 printf("check-connectivity\n");
1453 printf("\n");
1454 fflush(stdout);
1455 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1456 if (!stateless_connect(arg))
1457 break;
1458 } else {
1459 error("remote-curl: unknown command '%s' from git", buf.buf);
1460 return 1;
1461 }
1462 strbuf_reset(&buf);
1463 } while (1);
1464 http_cleanup();
1466 return 0;
1468}