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1 | #include "http.h" | |
2 | #include "pack.h" | |
3 | #include "sideband.h" | |
4 | #include "run-command.h" | |
5 | #include "url.h" | |
6 | #include "credential.h" | |
7 | #include "version.h" | |
8 | #include "pkt-line.h" | |
9 | ||
10 | int active_requests; | |
11 | int http_is_verbose; | |
12 | size_t http_post_buffer = 16 * LARGE_PACKET_MAX; | |
13 | ||
14 | #if LIBCURL_VERSION_NUM >= 0x070a06 | |
15 | #define LIBCURL_CAN_HANDLE_AUTH_ANY | |
16 | #endif | |
17 | ||
18 | static int min_curl_sessions = 1; | |
19 | static int curl_session_count; | |
20 | #ifdef USE_CURL_MULTI | |
21 | static int max_requests = -1; | |
22 | static CURLM *curlm; | |
23 | #endif | |
24 | #ifndef NO_CURL_EASY_DUPHANDLE | |
25 | static CURL *curl_default; | |
26 | #endif | |
27 | ||
28 | #define PREV_BUF_SIZE 4096 | |
29 | #define RANGE_HEADER_SIZE 30 | |
30 | ||
31 | char curl_errorstr[CURL_ERROR_SIZE]; | |
32 | ||
33 | static int curl_ssl_verify = -1; | |
34 | static int curl_ssl_try; | |
35 | static const char *ssl_cert; | |
36 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
37 | static const char *ssl_key; | |
38 | #endif | |
39 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
40 | static const char *ssl_capath; | |
41 | #endif | |
42 | static const char *ssl_cainfo; | |
43 | static long curl_low_speed_limit = -1; | |
44 | static long curl_low_speed_time = -1; | |
45 | static int curl_ftp_no_epsv; | |
46 | static const char *curl_http_proxy; | |
47 | static const char *curl_cookie_file; | |
48 | static struct credential http_auth = CREDENTIAL_INIT; | |
49 | static int http_proactive_auth; | |
50 | static const char *user_agent; | |
51 | ||
52 | #if LIBCURL_VERSION_NUM >= 0x071700 | |
53 | /* Use CURLOPT_KEYPASSWD as is */ | |
54 | #elif LIBCURL_VERSION_NUM >= 0x070903 | |
55 | #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD | |
56 | #else | |
57 | #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD | |
58 | #endif | |
59 | ||
60 | static struct credential cert_auth = CREDENTIAL_INIT; | |
61 | static int ssl_cert_password_required; | |
62 | ||
63 | static struct curl_slist *pragma_header; | |
64 | static struct curl_slist *no_pragma_header; | |
65 | ||
66 | static struct active_request_slot *active_queue_head; | |
67 | ||
68 | size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) | |
69 | { | |
70 | size_t size = eltsize * nmemb; | |
71 | struct buffer *buffer = buffer_; | |
72 | ||
73 | if (size > buffer->buf.len - buffer->posn) | |
74 | size = buffer->buf.len - buffer->posn; | |
75 | memcpy(ptr, buffer->buf.buf + buffer->posn, size); | |
76 | buffer->posn += size; | |
77 | ||
78 | return size; | |
79 | } | |
80 | ||
81 | #ifndef NO_CURL_IOCTL | |
82 | curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp) | |
83 | { | |
84 | struct buffer *buffer = clientp; | |
85 | ||
86 | switch (cmd) { | |
87 | case CURLIOCMD_NOP: | |
88 | return CURLIOE_OK; | |
89 | ||
90 | case CURLIOCMD_RESTARTREAD: | |
91 | buffer->posn = 0; | |
92 | return CURLIOE_OK; | |
93 | ||
94 | default: | |
95 | return CURLIOE_UNKNOWNCMD; | |
96 | } | |
97 | } | |
98 | #endif | |
99 | ||
100 | size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) | |
101 | { | |
102 | size_t size = eltsize * nmemb; | |
103 | struct strbuf *buffer = buffer_; | |
104 | ||
105 | strbuf_add(buffer, ptr, size); | |
106 | return size; | |
107 | } | |
108 | ||
109 | size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf) | |
110 | { | |
111 | return eltsize * nmemb; | |
112 | } | |
113 | ||
114 | #ifdef USE_CURL_MULTI | |
115 | static void process_curl_messages(void) | |
116 | { | |
117 | int num_messages; | |
118 | struct active_request_slot *slot; | |
119 | CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages); | |
120 | ||
121 | while (curl_message != NULL) { | |
122 | if (curl_message->msg == CURLMSG_DONE) { | |
123 | int curl_result = curl_message->data.result; | |
124 | slot = active_queue_head; | |
125 | while (slot != NULL && | |
126 | slot->curl != curl_message->easy_handle) | |
127 | slot = slot->next; | |
128 | if (slot != NULL) { | |
129 | curl_multi_remove_handle(curlm, slot->curl); | |
130 | slot->curl_result = curl_result; | |
131 | finish_active_slot(slot); | |
132 | } else { | |
133 | fprintf(stderr, "Received DONE message for unknown request!\n"); | |
134 | } | |
135 | } else { | |
136 | fprintf(stderr, "Unknown CURL message received: %d\n", | |
137 | (int)curl_message->msg); | |
138 | } | |
139 | curl_message = curl_multi_info_read(curlm, &num_messages); | |
140 | } | |
141 | } | |
142 | #endif | |
143 | ||
144 | static int http_options(const char *var, const char *value, void *cb) | |
145 | { | |
146 | if (!strcmp("http.sslverify", var)) { | |
147 | curl_ssl_verify = git_config_bool(var, value); | |
148 | return 0; | |
149 | } | |
150 | if (!strcmp("http.sslcert", var)) | |
151 | return git_config_string(&ssl_cert, var, value); | |
152 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
153 | if (!strcmp("http.sslkey", var)) | |
154 | return git_config_string(&ssl_key, var, value); | |
155 | #endif | |
156 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
157 | if (!strcmp("http.sslcapath", var)) | |
158 | return git_config_string(&ssl_capath, var, value); | |
159 | #endif | |
160 | if (!strcmp("http.sslcainfo", var)) | |
161 | return git_config_string(&ssl_cainfo, var, value); | |
162 | if (!strcmp("http.sslcertpasswordprotected", var)) { | |
163 | if (git_config_bool(var, value)) | |
164 | ssl_cert_password_required = 1; | |
165 | return 0; | |
166 | } | |
167 | if (!strcmp("http.ssltry", var)) { | |
168 | curl_ssl_try = git_config_bool(var, value); | |
169 | return 0; | |
170 | } | |
171 | if (!strcmp("http.minsessions", var)) { | |
172 | min_curl_sessions = git_config_int(var, value); | |
173 | #ifndef USE_CURL_MULTI | |
174 | if (min_curl_sessions > 1) | |
175 | min_curl_sessions = 1; | |
176 | #endif | |
177 | return 0; | |
178 | } | |
179 | #ifdef USE_CURL_MULTI | |
180 | if (!strcmp("http.maxrequests", var)) { | |
181 | max_requests = git_config_int(var, value); | |
182 | return 0; | |
183 | } | |
184 | #endif | |
185 | if (!strcmp("http.lowspeedlimit", var)) { | |
186 | curl_low_speed_limit = (long)git_config_int(var, value); | |
187 | return 0; | |
188 | } | |
189 | if (!strcmp("http.lowspeedtime", var)) { | |
190 | curl_low_speed_time = (long)git_config_int(var, value); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | if (!strcmp("http.noepsv", var)) { | |
195 | curl_ftp_no_epsv = git_config_bool(var, value); | |
196 | return 0; | |
197 | } | |
198 | if (!strcmp("http.proxy", var)) | |
199 | return git_config_string(&curl_http_proxy, var, value); | |
200 | ||
201 | if (!strcmp("http.cookiefile", var)) | |
202 | return git_config_string(&curl_cookie_file, var, value); | |
203 | ||
204 | if (!strcmp("http.postbuffer", var)) { | |
205 | http_post_buffer = git_config_int(var, value); | |
206 | if (http_post_buffer < LARGE_PACKET_MAX) | |
207 | http_post_buffer = LARGE_PACKET_MAX; | |
208 | return 0; | |
209 | } | |
210 | ||
211 | if (!strcmp("http.useragent", var)) | |
212 | return git_config_string(&user_agent, var, value); | |
213 | ||
214 | /* Fall back on the default ones */ | |
215 | return git_default_config(var, value, cb); | |
216 | } | |
217 | ||
218 | static void init_curl_http_auth(CURL *result) | |
219 | { | |
220 | if (!http_auth.username) | |
221 | return; | |
222 | ||
223 | credential_fill(&http_auth); | |
224 | ||
225 | #if LIBCURL_VERSION_NUM >= 0x071301 | |
226 | curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username); | |
227 | curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password); | |
228 | #else | |
229 | { | |
230 | static struct strbuf up = STRBUF_INIT; | |
231 | /* | |
232 | * Note that we assume we only ever have a single set of | |
233 | * credentials in a given program run, so we do not have | |
234 | * to worry about updating this buffer, only setting its | |
235 | * initial value. | |
236 | */ | |
237 | if (!up.len) | |
238 | strbuf_addf(&up, "%s:%s", | |
239 | http_auth.username, http_auth.password); | |
240 | curl_easy_setopt(result, CURLOPT_USERPWD, up.buf); | |
241 | } | |
242 | #endif | |
243 | } | |
244 | ||
245 | static int has_cert_password(void) | |
246 | { | |
247 | if (ssl_cert == NULL || ssl_cert_password_required != 1) | |
248 | return 0; | |
249 | if (!cert_auth.password) { | |
250 | cert_auth.protocol = xstrdup("cert"); | |
251 | cert_auth.username = xstrdup(""); | |
252 | cert_auth.path = xstrdup(ssl_cert); | |
253 | credential_fill(&cert_auth); | |
254 | } | |
255 | return 1; | |
256 | } | |
257 | ||
258 | static CURL *get_curl_handle(void) | |
259 | { | |
260 | CURL *result = curl_easy_init(); | |
261 | ||
262 | if (!curl_ssl_verify) { | |
263 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0); | |
264 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0); | |
265 | } else { | |
266 | /* Verify authenticity of the peer's certificate */ | |
267 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1); | |
268 | /* The name in the cert must match whom we tried to connect */ | |
269 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2); | |
270 | } | |
271 | ||
272 | #if LIBCURL_VERSION_NUM >= 0x070907 | |
273 | curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL); | |
274 | #endif | |
275 | #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY | |
276 | curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY); | |
277 | #endif | |
278 | ||
279 | if (http_proactive_auth) | |
280 | init_curl_http_auth(result); | |
281 | ||
282 | if (ssl_cert != NULL) | |
283 | curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); | |
284 | if (has_cert_password()) | |
285 | curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password); | |
286 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
287 | if (ssl_key != NULL) | |
288 | curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); | |
289 | #endif | |
290 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
291 | if (ssl_capath != NULL) | |
292 | curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); | |
293 | #endif | |
294 | if (ssl_cainfo != NULL) | |
295 | curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); | |
296 | ||
297 | if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { | |
298 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, | |
299 | curl_low_speed_limit); | |
300 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME, | |
301 | curl_low_speed_time); | |
302 | } | |
303 | ||
304 | curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1); | |
305 | #if LIBCURL_VERSION_NUM >= 0x071301 | |
306 | curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL); | |
307 | #elif LIBCURL_VERSION_NUM >= 0x071101 | |
308 | curl_easy_setopt(result, CURLOPT_POST301, 1); | |
309 | #endif | |
310 | ||
311 | if (getenv("GIT_CURL_VERBOSE")) | |
312 | curl_easy_setopt(result, CURLOPT_VERBOSE, 1); | |
313 | ||
314 | curl_easy_setopt(result, CURLOPT_USERAGENT, | |
315 | user_agent ? user_agent : git_user_agent()); | |
316 | ||
317 | if (curl_ftp_no_epsv) | |
318 | curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); | |
319 | ||
320 | #ifdef CURLOPT_USE_SSL | |
321 | if (curl_ssl_try) | |
322 | curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY); | |
323 | #endif | |
324 | ||
325 | if (curl_http_proxy) { | |
326 | curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy); | |
327 | curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); | |
328 | } | |
329 | ||
330 | return result; | |
331 | } | |
332 | ||
333 | static void set_from_env(const char **var, const char *envname) | |
334 | { | |
335 | const char *val = getenv(envname); | |
336 | if (val) | |
337 | *var = val; | |
338 | } | |
339 | ||
340 | void http_init(struct remote *remote, const char *url, int proactive_auth) | |
341 | { | |
342 | char *low_speed_limit; | |
343 | char *low_speed_time; | |
344 | ||
345 | http_is_verbose = 0; | |
346 | ||
347 | git_config(http_options, NULL); | |
348 | ||
349 | curl_global_init(CURL_GLOBAL_ALL); | |
350 | ||
351 | http_proactive_auth = proactive_auth; | |
352 | ||
353 | if (remote && remote->http_proxy) | |
354 | curl_http_proxy = xstrdup(remote->http_proxy); | |
355 | ||
356 | pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache"); | |
357 | no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:"); | |
358 | ||
359 | #ifdef USE_CURL_MULTI | |
360 | { | |
361 | char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS"); | |
362 | if (http_max_requests != NULL) | |
363 | max_requests = atoi(http_max_requests); | |
364 | } | |
365 | ||
366 | curlm = curl_multi_init(); | |
367 | if (curlm == NULL) { | |
368 | fprintf(stderr, "Error creating curl multi handle.\n"); | |
369 | exit(1); | |
370 | } | |
371 | #endif | |
372 | ||
373 | if (getenv("GIT_SSL_NO_VERIFY")) | |
374 | curl_ssl_verify = 0; | |
375 | ||
376 | set_from_env(&ssl_cert, "GIT_SSL_CERT"); | |
377 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
378 | set_from_env(&ssl_key, "GIT_SSL_KEY"); | |
379 | #endif | |
380 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
381 | set_from_env(&ssl_capath, "GIT_SSL_CAPATH"); | |
382 | #endif | |
383 | set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO"); | |
384 | ||
385 | set_from_env(&user_agent, "GIT_HTTP_USER_AGENT"); | |
386 | ||
387 | low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT"); | |
388 | if (low_speed_limit != NULL) | |
389 | curl_low_speed_limit = strtol(low_speed_limit, NULL, 10); | |
390 | low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME"); | |
391 | if (low_speed_time != NULL) | |
392 | curl_low_speed_time = strtol(low_speed_time, NULL, 10); | |
393 | ||
394 | if (curl_ssl_verify == -1) | |
395 | curl_ssl_verify = 1; | |
396 | ||
397 | curl_session_count = 0; | |
398 | #ifdef USE_CURL_MULTI | |
399 | if (max_requests < 1) | |
400 | max_requests = DEFAULT_MAX_REQUESTS; | |
401 | #endif | |
402 | ||
403 | if (getenv("GIT_CURL_FTP_NO_EPSV")) | |
404 | curl_ftp_no_epsv = 1; | |
405 | ||
406 | if (url) { | |
407 | credential_from_url(&http_auth, url); | |
408 | if (!ssl_cert_password_required && | |
409 | getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") && | |
410 | !prefixcmp(url, "https://")) | |
411 | ssl_cert_password_required = 1; | |
412 | } | |
413 | ||
414 | #ifndef NO_CURL_EASY_DUPHANDLE | |
415 | curl_default = get_curl_handle(); | |
416 | #endif | |
417 | } | |
418 | ||
419 | void http_cleanup(void) | |
420 | { | |
421 | struct active_request_slot *slot = active_queue_head; | |
422 | ||
423 | while (slot != NULL) { | |
424 | struct active_request_slot *next = slot->next; | |
425 | if (slot->curl != NULL) { | |
426 | #ifdef USE_CURL_MULTI | |
427 | curl_multi_remove_handle(curlm, slot->curl); | |
428 | #endif | |
429 | curl_easy_cleanup(slot->curl); | |
430 | } | |
431 | free(slot); | |
432 | slot = next; | |
433 | } | |
434 | active_queue_head = NULL; | |
435 | ||
436 | #ifndef NO_CURL_EASY_DUPHANDLE | |
437 | curl_easy_cleanup(curl_default); | |
438 | #endif | |
439 | ||
440 | #ifdef USE_CURL_MULTI | |
441 | curl_multi_cleanup(curlm); | |
442 | #endif | |
443 | curl_global_cleanup(); | |
444 | ||
445 | curl_slist_free_all(pragma_header); | |
446 | pragma_header = NULL; | |
447 | ||
448 | curl_slist_free_all(no_pragma_header); | |
449 | no_pragma_header = NULL; | |
450 | ||
451 | if (curl_http_proxy) { | |
452 | free((void *)curl_http_proxy); | |
453 | curl_http_proxy = NULL; | |
454 | } | |
455 | ||
456 | if (cert_auth.password != NULL) { | |
457 | memset(cert_auth.password, 0, strlen(cert_auth.password)); | |
458 | free(cert_auth.password); | |
459 | cert_auth.password = NULL; | |
460 | } | |
461 | ssl_cert_password_required = 0; | |
462 | } | |
463 | ||
464 | struct active_request_slot *get_active_slot(void) | |
465 | { | |
466 | struct active_request_slot *slot = active_queue_head; | |
467 | struct active_request_slot *newslot; | |
468 | ||
469 | #ifdef USE_CURL_MULTI | |
470 | int num_transfers; | |
471 | ||
472 | /* Wait for a slot to open up if the queue is full */ | |
473 | while (active_requests >= max_requests) { | |
474 | curl_multi_perform(curlm, &num_transfers); | |
475 | if (num_transfers < active_requests) | |
476 | process_curl_messages(); | |
477 | } | |
478 | #endif | |
479 | ||
480 | while (slot != NULL && slot->in_use) | |
481 | slot = slot->next; | |
482 | ||
483 | if (slot == NULL) { | |
484 | newslot = xmalloc(sizeof(*newslot)); | |
485 | newslot->curl = NULL; | |
486 | newslot->in_use = 0; | |
487 | newslot->next = NULL; | |
488 | ||
489 | slot = active_queue_head; | |
490 | if (slot == NULL) { | |
491 | active_queue_head = newslot; | |
492 | } else { | |
493 | while (slot->next != NULL) | |
494 | slot = slot->next; | |
495 | slot->next = newslot; | |
496 | } | |
497 | slot = newslot; | |
498 | } | |
499 | ||
500 | if (slot->curl == NULL) { | |
501 | #ifdef NO_CURL_EASY_DUPHANDLE | |
502 | slot->curl = get_curl_handle(); | |
503 | #else | |
504 | slot->curl = curl_easy_duphandle(curl_default); | |
505 | #endif | |
506 | curl_session_count++; | |
507 | } | |
508 | ||
509 | active_requests++; | |
510 | slot->in_use = 1; | |
511 | slot->results = NULL; | |
512 | slot->finished = NULL; | |
513 | slot->callback_data = NULL; | |
514 | slot->callback_func = NULL; | |
515 | curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file); | |
516 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); | |
517 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); | |
518 | curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); | |
519 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); | |
520 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL); | |
521 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL); | |
522 | curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); | |
523 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
524 | curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1); | |
525 | if (http_auth.password) | |
526 | init_curl_http_auth(slot->curl); | |
527 | ||
528 | return slot; | |
529 | } | |
530 | ||
531 | int start_active_slot(struct active_request_slot *slot) | |
532 | { | |
533 | #ifdef USE_CURL_MULTI | |
534 | CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl); | |
535 | int num_transfers; | |
536 | ||
537 | if (curlm_result != CURLM_OK && | |
538 | curlm_result != CURLM_CALL_MULTI_PERFORM) { | |
539 | active_requests--; | |
540 | slot->in_use = 0; | |
541 | return 0; | |
542 | } | |
543 | ||
544 | /* | |
545 | * We know there must be something to do, since we just added | |
546 | * something. | |
547 | */ | |
548 | curl_multi_perform(curlm, &num_transfers); | |
549 | #endif | |
550 | return 1; | |
551 | } | |
552 | ||
553 | #ifdef USE_CURL_MULTI | |
554 | struct fill_chain { | |
555 | void *data; | |
556 | int (*fill)(void *); | |
557 | struct fill_chain *next; | |
558 | }; | |
559 | ||
560 | static struct fill_chain *fill_cfg; | |
561 | ||
562 | void add_fill_function(void *data, int (*fill)(void *)) | |
563 | { | |
564 | struct fill_chain *new = xmalloc(sizeof(*new)); | |
565 | struct fill_chain **linkp = &fill_cfg; | |
566 | new->data = data; | |
567 | new->fill = fill; | |
568 | new->next = NULL; | |
569 | while (*linkp) | |
570 | linkp = &(*linkp)->next; | |
571 | *linkp = new; | |
572 | } | |
573 | ||
574 | void fill_active_slots(void) | |
575 | { | |
576 | struct active_request_slot *slot = active_queue_head; | |
577 | ||
578 | while (active_requests < max_requests) { | |
579 | struct fill_chain *fill; | |
580 | for (fill = fill_cfg; fill; fill = fill->next) | |
581 | if (fill->fill(fill->data)) | |
582 | break; | |
583 | ||
584 | if (!fill) | |
585 | break; | |
586 | } | |
587 | ||
588 | while (slot != NULL) { | |
589 | if (!slot->in_use && slot->curl != NULL | |
590 | && curl_session_count > min_curl_sessions) { | |
591 | curl_easy_cleanup(slot->curl); | |
592 | slot->curl = NULL; | |
593 | curl_session_count--; | |
594 | } | |
595 | slot = slot->next; | |
596 | } | |
597 | } | |
598 | ||
599 | void step_active_slots(void) | |
600 | { | |
601 | int num_transfers; | |
602 | CURLMcode curlm_result; | |
603 | ||
604 | do { | |
605 | curlm_result = curl_multi_perform(curlm, &num_transfers); | |
606 | } while (curlm_result == CURLM_CALL_MULTI_PERFORM); | |
607 | if (num_transfers < active_requests) { | |
608 | process_curl_messages(); | |
609 | fill_active_slots(); | |
610 | } | |
611 | } | |
612 | #endif | |
613 | ||
614 | void run_active_slot(struct active_request_slot *slot) | |
615 | { | |
616 | #ifdef USE_CURL_MULTI | |
617 | fd_set readfds; | |
618 | fd_set writefds; | |
619 | fd_set excfds; | |
620 | int max_fd; | |
621 | struct timeval select_timeout; | |
622 | int finished = 0; | |
623 | ||
624 | slot->finished = &finished; | |
625 | while (!finished) { | |
626 | step_active_slots(); | |
627 | ||
628 | if (slot->in_use) { | |
629 | #if LIBCURL_VERSION_NUM >= 0x070f04 | |
630 | long curl_timeout; | |
631 | curl_multi_timeout(curlm, &curl_timeout); | |
632 | if (curl_timeout == 0) { | |
633 | continue; | |
634 | } else if (curl_timeout == -1) { | |
635 | select_timeout.tv_sec = 0; | |
636 | select_timeout.tv_usec = 50000; | |
637 | } else { | |
638 | select_timeout.tv_sec = curl_timeout / 1000; | |
639 | select_timeout.tv_usec = (curl_timeout % 1000) * 1000; | |
640 | } | |
641 | #else | |
642 | select_timeout.tv_sec = 0; | |
643 | select_timeout.tv_usec = 50000; | |
644 | #endif | |
645 | ||
646 | max_fd = -1; | |
647 | FD_ZERO(&readfds); | |
648 | FD_ZERO(&writefds); | |
649 | FD_ZERO(&excfds); | |
650 | curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd); | |
651 | ||
652 | /* | |
653 | * It can happen that curl_multi_timeout returns a pathologically | |
654 | * long timeout when curl_multi_fdset returns no file descriptors | |
655 | * to read. See commit message for more details. | |
656 | */ | |
657 | if (max_fd < 0 && | |
658 | (select_timeout.tv_sec > 0 || | |
659 | select_timeout.tv_usec > 50000)) { | |
660 | select_timeout.tv_sec = 0; | |
661 | select_timeout.tv_usec = 50000; | |
662 | } | |
663 | ||
664 | select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout); | |
665 | } | |
666 | } | |
667 | #else | |
668 | while (slot->in_use) { | |
669 | slot->curl_result = curl_easy_perform(slot->curl); | |
670 | finish_active_slot(slot); | |
671 | } | |
672 | #endif | |
673 | } | |
674 | ||
675 | static void closedown_active_slot(struct active_request_slot *slot) | |
676 | { | |
677 | active_requests--; | |
678 | slot->in_use = 0; | |
679 | } | |
680 | ||
681 | static void release_active_slot(struct active_request_slot *slot) | |
682 | { | |
683 | closedown_active_slot(slot); | |
684 | if (slot->curl && curl_session_count > min_curl_sessions) { | |
685 | #ifdef USE_CURL_MULTI | |
686 | curl_multi_remove_handle(curlm, slot->curl); | |
687 | #endif | |
688 | curl_easy_cleanup(slot->curl); | |
689 | slot->curl = NULL; | |
690 | curl_session_count--; | |
691 | } | |
692 | #ifdef USE_CURL_MULTI | |
693 | fill_active_slots(); | |
694 | #endif | |
695 | } | |
696 | ||
697 | void finish_active_slot(struct active_request_slot *slot) | |
698 | { | |
699 | closedown_active_slot(slot); | |
700 | curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); | |
701 | ||
702 | if (slot->finished != NULL) | |
703 | (*slot->finished) = 1; | |
704 | ||
705 | /* Store slot results so they can be read after the slot is reused */ | |
706 | if (slot->results != NULL) { | |
707 | slot->results->curl_result = slot->curl_result; | |
708 | slot->results->http_code = slot->http_code; | |
709 | } | |
710 | ||
711 | /* Run callback if appropriate */ | |
712 | if (slot->callback_func != NULL) | |
713 | slot->callback_func(slot->callback_data); | |
714 | } | |
715 | ||
716 | void finish_all_active_slots(void) | |
717 | { | |
718 | struct active_request_slot *slot = active_queue_head; | |
719 | ||
720 | while (slot != NULL) | |
721 | if (slot->in_use) { | |
722 | run_active_slot(slot); | |
723 | slot = active_queue_head; | |
724 | } else { | |
725 | slot = slot->next; | |
726 | } | |
727 | } | |
728 | ||
729 | /* Helpers for modifying and creating URLs */ | |
730 | static inline int needs_quote(int ch) | |
731 | { | |
732 | if (((ch >= 'A') && (ch <= 'Z')) | |
733 | || ((ch >= 'a') && (ch <= 'z')) | |
734 | || ((ch >= '0') && (ch <= '9')) | |
735 | || (ch == '/') | |
736 | || (ch == '-') | |
737 | || (ch == '.')) | |
738 | return 0; | |
739 | return 1; | |
740 | } | |
741 | ||
742 | static char *quote_ref_url(const char *base, const char *ref) | |
743 | { | |
744 | struct strbuf buf = STRBUF_INIT; | |
745 | const char *cp; | |
746 | int ch; | |
747 | ||
748 | end_url_with_slash(&buf, base); | |
749 | ||
750 | for (cp = ref; (ch = *cp) != 0; cp++) | |
751 | if (needs_quote(ch)) | |
752 | strbuf_addf(&buf, "%%%02x", ch); | |
753 | else | |
754 | strbuf_addch(&buf, *cp); | |
755 | ||
756 | return strbuf_detach(&buf, NULL); | |
757 | } | |
758 | ||
759 | void append_remote_object_url(struct strbuf *buf, const char *url, | |
760 | const char *hex, | |
761 | int only_two_digit_prefix) | |
762 | { | |
763 | end_url_with_slash(buf, url); | |
764 | ||
765 | strbuf_addf(buf, "objects/%.*s/", 2, hex); | |
766 | if (!only_two_digit_prefix) | |
767 | strbuf_addf(buf, "%s", hex+2); | |
768 | } | |
769 | ||
770 | char *get_remote_object_url(const char *url, const char *hex, | |
771 | int only_two_digit_prefix) | |
772 | { | |
773 | struct strbuf buf = STRBUF_INIT; | |
774 | append_remote_object_url(&buf, url, hex, only_two_digit_prefix); | |
775 | return strbuf_detach(&buf, NULL); | |
776 | } | |
777 | ||
778 | int handle_curl_result(struct slot_results *results) | |
779 | { | |
780 | /* | |
781 | * If we see a failing http code with CURLE_OK, we have turned off | |
782 | * FAILONERROR (to keep the server's custom error response), and should | |
783 | * translate the code into failure here. | |
784 | */ | |
785 | if (results->curl_result == CURLE_OK && | |
786 | results->http_code >= 400) { | |
787 | results->curl_result = CURLE_HTTP_RETURNED_ERROR; | |
788 | /* | |
789 | * Normally curl will already have put the "reason phrase" | |
790 | * from the server into curl_errorstr; unfortunately without | |
791 | * FAILONERROR it is lost, so we can give only the numeric | |
792 | * status code. | |
793 | */ | |
794 | snprintf(curl_errorstr, sizeof(curl_errorstr), | |
795 | "The requested URL returned error: %ld", | |
796 | results->http_code); | |
797 | } | |
798 | ||
799 | if (results->curl_result == CURLE_OK) { | |
800 | credential_approve(&http_auth); | |
801 | return HTTP_OK; | |
802 | } else if (missing_target(results)) | |
803 | return HTTP_MISSING_TARGET; | |
804 | else if (results->http_code == 401) { | |
805 | if (http_auth.username && http_auth.password) { | |
806 | credential_reject(&http_auth); | |
807 | return HTTP_NOAUTH; | |
808 | } else { | |
809 | credential_fill(&http_auth); | |
810 | return HTTP_REAUTH; | |
811 | } | |
812 | } else { | |
813 | #if LIBCURL_VERSION_NUM >= 0x070c00 | |
814 | if (!curl_errorstr[0]) | |
815 | strlcpy(curl_errorstr, | |
816 | curl_easy_strerror(results->curl_result), | |
817 | sizeof(curl_errorstr)); | |
818 | #endif | |
819 | return HTTP_ERROR; | |
820 | } | |
821 | } | |
822 | ||
823 | /* http_request() targets */ | |
824 | #define HTTP_REQUEST_STRBUF 0 | |
825 | #define HTTP_REQUEST_FILE 1 | |
826 | ||
827 | static int http_request(const char *url, struct strbuf *type, | |
828 | void *result, int target, int options) | |
829 | { | |
830 | struct active_request_slot *slot; | |
831 | struct slot_results results; | |
832 | struct curl_slist *headers = NULL; | |
833 | struct strbuf buf = STRBUF_INIT; | |
834 | int ret; | |
835 | ||
836 | slot = get_active_slot(); | |
837 | slot->results = &results; | |
838 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
839 | ||
840 | if (result == NULL) { | |
841 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1); | |
842 | } else { | |
843 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); | |
844 | curl_easy_setopt(slot->curl, CURLOPT_FILE, result); | |
845 | ||
846 | if (target == HTTP_REQUEST_FILE) { | |
847 | long posn = ftell(result); | |
848 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, | |
849 | fwrite); | |
850 | if (posn > 0) { | |
851 | strbuf_addf(&buf, "Range: bytes=%ld-", posn); | |
852 | headers = curl_slist_append(headers, buf.buf); | |
853 | strbuf_reset(&buf); | |
854 | } | |
855 | } else | |
856 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, | |
857 | fwrite_buffer); | |
858 | } | |
859 | ||
860 | strbuf_addstr(&buf, "Pragma:"); | |
861 | if (options & HTTP_NO_CACHE) | |
862 | strbuf_addstr(&buf, " no-cache"); | |
863 | if (options & HTTP_KEEP_ERROR) | |
864 | curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0); | |
865 | ||
866 | headers = curl_slist_append(headers, buf.buf); | |
867 | ||
868 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
869 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); | |
870 | curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip"); | |
871 | ||
872 | if (start_active_slot(slot)) { | |
873 | run_active_slot(slot); | |
874 | ret = handle_curl_result(&results); | |
875 | } else { | |
876 | snprintf(curl_errorstr, sizeof(curl_errorstr), | |
877 | "failed to start HTTP request"); | |
878 | ret = HTTP_START_FAILED; | |
879 | } | |
880 | ||
881 | if (type) { | |
882 | char *t; | |
883 | strbuf_reset(type); | |
884 | curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t); | |
885 | if (t) | |
886 | strbuf_addstr(type, t); | |
887 | } | |
888 | ||
889 | curl_slist_free_all(headers); | |
890 | strbuf_release(&buf); | |
891 | ||
892 | return ret; | |
893 | } | |
894 | ||
895 | static int http_request_reauth(const char *url, | |
896 | struct strbuf *type, | |
897 | void *result, int target, | |
898 | int options) | |
899 | { | |
900 | int ret = http_request(url, type, result, target, options); | |
901 | if (ret != HTTP_REAUTH) | |
902 | return ret; | |
903 | ||
904 | /* | |
905 | * If we are using KEEP_ERROR, the previous request may have | |
906 | * put cruft into our output stream; we should clear it out before | |
907 | * making our next request. We only know how to do this for | |
908 | * the strbuf case, but that is enough to satisfy current callers. | |
909 | */ | |
910 | if (options & HTTP_KEEP_ERROR) { | |
911 | switch (target) { | |
912 | case HTTP_REQUEST_STRBUF: | |
913 | strbuf_reset(result); | |
914 | break; | |
915 | default: | |
916 | die("BUG: HTTP_KEEP_ERROR is only supported with strbufs"); | |
917 | } | |
918 | } | |
919 | return http_request(url, type, result, target, options); | |
920 | } | |
921 | ||
922 | int http_get_strbuf(const char *url, | |
923 | struct strbuf *type, | |
924 | struct strbuf *result, int options) | |
925 | { | |
926 | return http_request_reauth(url, type, result, | |
927 | HTTP_REQUEST_STRBUF, options); | |
928 | } | |
929 | ||
930 | /* | |
931 | * Downloads a URL and stores the result in the given file. | |
932 | * | |
933 | * If a previous interrupted download is detected (i.e. a previous temporary | |
934 | * file is still around) the download is resumed. | |
935 | */ | |
936 | static int http_get_file(const char *url, const char *filename, int options) | |
937 | { | |
938 | int ret; | |
939 | struct strbuf tmpfile = STRBUF_INIT; | |
940 | FILE *result; | |
941 | ||
942 | strbuf_addf(&tmpfile, "%s.temp", filename); | |
943 | result = fopen(tmpfile.buf, "a"); | |
944 | if (!result) { | |
945 | error("Unable to open local file %s", tmpfile.buf); | |
946 | ret = HTTP_ERROR; | |
947 | goto cleanup; | |
948 | } | |
949 | ||
950 | ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options); | |
951 | fclose(result); | |
952 | ||
953 | if (ret == HTTP_OK && move_temp_to_file(tmpfile.buf, filename)) | |
954 | ret = HTTP_ERROR; | |
955 | cleanup: | |
956 | strbuf_release(&tmpfile); | |
957 | return ret; | |
958 | } | |
959 | ||
960 | int http_fetch_ref(const char *base, struct ref *ref) | |
961 | { | |
962 | char *url; | |
963 | struct strbuf buffer = STRBUF_INIT; | |
964 | int ret = -1; | |
965 | ||
966 | url = quote_ref_url(base, ref->name); | |
967 | if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) { | |
968 | strbuf_rtrim(&buffer); | |
969 | if (buffer.len == 40) | |
970 | ret = get_sha1_hex(buffer.buf, ref->old_sha1); | |
971 | else if (!prefixcmp(buffer.buf, "ref: ")) { | |
972 | ref->symref = xstrdup(buffer.buf + 5); | |
973 | ret = 0; | |
974 | } | |
975 | } | |
976 | ||
977 | strbuf_release(&buffer); | |
978 | free(url); | |
979 | return ret; | |
980 | } | |
981 | ||
982 | /* Helpers for fetching packs */ | |
983 | static char *fetch_pack_index(unsigned char *sha1, const char *base_url) | |
984 | { | |
985 | char *url, *tmp; | |
986 | struct strbuf buf = STRBUF_INIT; | |
987 | ||
988 | if (http_is_verbose) | |
989 | fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1)); | |
990 | ||
991 | end_url_with_slash(&buf, base_url); | |
992 | strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1)); | |
993 | url = strbuf_detach(&buf, NULL); | |
994 | ||
995 | strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1)); | |
996 | tmp = strbuf_detach(&buf, NULL); | |
997 | ||
998 | if (http_get_file(url, tmp, 0) != HTTP_OK) { | |
999 | error("Unable to get pack index %s", url); | |
1000 | free(tmp); | |
1001 | tmp = NULL; | |
1002 | } | |
1003 | ||
1004 | free(url); | |
1005 | return tmp; | |
1006 | } | |
1007 | ||
1008 | static int fetch_and_setup_pack_index(struct packed_git **packs_head, | |
1009 | unsigned char *sha1, const char *base_url) | |
1010 | { | |
1011 | struct packed_git *new_pack; | |
1012 | char *tmp_idx = NULL; | |
1013 | int ret; | |
1014 | ||
1015 | if (has_pack_index(sha1)) { | |
1016 | new_pack = parse_pack_index(sha1, NULL); | |
1017 | if (!new_pack) | |
1018 | return -1; /* parse_pack_index() already issued error message */ | |
1019 | goto add_pack; | |
1020 | } | |
1021 | ||
1022 | tmp_idx = fetch_pack_index(sha1, base_url); | |
1023 | if (!tmp_idx) | |
1024 | return -1; | |
1025 | ||
1026 | new_pack = parse_pack_index(sha1, tmp_idx); | |
1027 | if (!new_pack) { | |
1028 | unlink(tmp_idx); | |
1029 | free(tmp_idx); | |
1030 | ||
1031 | return -1; /* parse_pack_index() already issued error message */ | |
1032 | } | |
1033 | ||
1034 | ret = verify_pack_index(new_pack); | |
1035 | if (!ret) { | |
1036 | close_pack_index(new_pack); | |
1037 | ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1)); | |
1038 | } | |
1039 | free(tmp_idx); | |
1040 | if (ret) | |
1041 | return -1; | |
1042 | ||
1043 | add_pack: | |
1044 | new_pack->next = *packs_head; | |
1045 | *packs_head = new_pack; | |
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | int http_get_info_packs(const char *base_url, struct packed_git **packs_head) | |
1050 | { | |
1051 | int ret = 0, i = 0; | |
1052 | char *url, *data; | |
1053 | struct strbuf buf = STRBUF_INIT; | |
1054 | unsigned char sha1[20]; | |
1055 | ||
1056 | end_url_with_slash(&buf, base_url); | |
1057 | strbuf_addstr(&buf, "objects/info/packs"); | |
1058 | url = strbuf_detach(&buf, NULL); | |
1059 | ||
1060 | ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE); | |
1061 | if (ret != HTTP_OK) | |
1062 | goto cleanup; | |
1063 | ||
1064 | data = buf.buf; | |
1065 | while (i < buf.len) { | |
1066 | switch (data[i]) { | |
1067 | case 'P': | |
1068 | i++; | |
1069 | if (i + 52 <= buf.len && | |
1070 | !prefixcmp(data + i, " pack-") && | |
1071 | !prefixcmp(data + i + 46, ".pack\n")) { | |
1072 | get_sha1_hex(data + i + 6, sha1); | |
1073 | fetch_and_setup_pack_index(packs_head, sha1, | |
1074 | base_url); | |
1075 | i += 51; | |
1076 | break; | |
1077 | } | |
1078 | default: | |
1079 | while (i < buf.len && data[i] != '\n') | |
1080 | i++; | |
1081 | } | |
1082 | i++; | |
1083 | } | |
1084 | ||
1085 | cleanup: | |
1086 | free(url); | |
1087 | return ret; | |
1088 | } | |
1089 | ||
1090 | void release_http_pack_request(struct http_pack_request *preq) | |
1091 | { | |
1092 | if (preq->packfile != NULL) { | |
1093 | fclose(preq->packfile); | |
1094 | preq->packfile = NULL; | |
1095 | } | |
1096 | if (preq->range_header != NULL) { | |
1097 | curl_slist_free_all(preq->range_header); | |
1098 | preq->range_header = NULL; | |
1099 | } | |
1100 | preq->slot = NULL; | |
1101 | free(preq->url); | |
1102 | } | |
1103 | ||
1104 | int finish_http_pack_request(struct http_pack_request *preq) | |
1105 | { | |
1106 | struct packed_git **lst; | |
1107 | struct packed_git *p = preq->target; | |
1108 | char *tmp_idx; | |
1109 | struct child_process ip; | |
1110 | const char *ip_argv[8]; | |
1111 | ||
1112 | close_pack_index(p); | |
1113 | ||
1114 | fclose(preq->packfile); | |
1115 | preq->packfile = NULL; | |
1116 | ||
1117 | lst = preq->lst; | |
1118 | while (*lst != p) | |
1119 | lst = &((*lst)->next); | |
1120 | *lst = (*lst)->next; | |
1121 | ||
1122 | tmp_idx = xstrdup(preq->tmpfile); | |
1123 | strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"), | |
1124 | ".idx.temp"); | |
1125 | ||
1126 | ip_argv[0] = "index-pack"; | |
1127 | ip_argv[1] = "-o"; | |
1128 | ip_argv[2] = tmp_idx; | |
1129 | ip_argv[3] = preq->tmpfile; | |
1130 | ip_argv[4] = NULL; | |
1131 | ||
1132 | memset(&ip, 0, sizeof(ip)); | |
1133 | ip.argv = ip_argv; | |
1134 | ip.git_cmd = 1; | |
1135 | ip.no_stdin = 1; | |
1136 | ip.no_stdout = 1; | |
1137 | ||
1138 | if (run_command(&ip)) { | |
1139 | unlink(preq->tmpfile); | |
1140 | unlink(tmp_idx); | |
1141 | free(tmp_idx); | |
1142 | return -1; | |
1143 | } | |
1144 | ||
1145 | unlink(sha1_pack_index_name(p->sha1)); | |
1146 | ||
1147 | if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1)) | |
1148 | || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) { | |
1149 | free(tmp_idx); | |
1150 | return -1; | |
1151 | } | |
1152 | ||
1153 | install_packed_git(p); | |
1154 | free(tmp_idx); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | struct http_pack_request *new_http_pack_request( | |
1159 | struct packed_git *target, const char *base_url) | |
1160 | { | |
1161 | long prev_posn = 0; | |
1162 | char range[RANGE_HEADER_SIZE]; | |
1163 | struct strbuf buf = STRBUF_INIT; | |
1164 | struct http_pack_request *preq; | |
1165 | ||
1166 | preq = xcalloc(1, sizeof(*preq)); | |
1167 | preq->target = target; | |
1168 | ||
1169 | end_url_with_slash(&buf, base_url); | |
1170 | strbuf_addf(&buf, "objects/pack/pack-%s.pack", | |
1171 | sha1_to_hex(target->sha1)); | |
1172 | preq->url = strbuf_detach(&buf, NULL); | |
1173 | ||
1174 | snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp", | |
1175 | sha1_pack_name(target->sha1)); | |
1176 | preq->packfile = fopen(preq->tmpfile, "a"); | |
1177 | if (!preq->packfile) { | |
1178 | error("Unable to open local file %s for pack", | |
1179 | preq->tmpfile); | |
1180 | goto abort; | |
1181 | } | |
1182 | ||
1183 | preq->slot = get_active_slot(); | |
1184 | curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile); | |
1185 | curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite); | |
1186 | curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url); | |
1187 | curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER, | |
1188 | no_pragma_header); | |
1189 | ||
1190 | /* | |
1191 | * If there is data present from a previous transfer attempt, | |
1192 | * resume where it left off | |
1193 | */ | |
1194 | prev_posn = ftell(preq->packfile); | |
1195 | if (prev_posn>0) { | |
1196 | if (http_is_verbose) | |
1197 | fprintf(stderr, | |
1198 | "Resuming fetch of pack %s at byte %ld\n", | |
1199 | sha1_to_hex(target->sha1), prev_posn); | |
1200 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
1201 | preq->range_header = curl_slist_append(NULL, range); | |
1202 | curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER, | |
1203 | preq->range_header); | |
1204 | } | |
1205 | ||
1206 | return preq; | |
1207 | ||
1208 | abort: | |
1209 | free(preq->url); | |
1210 | free(preq); | |
1211 | return NULL; | |
1212 | } | |
1213 | ||
1214 | /* Helpers for fetching objects (loose) */ | |
1215 | static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb, | |
1216 | void *data) | |
1217 | { | |
1218 | unsigned char expn[4096]; | |
1219 | size_t size = eltsize * nmemb; | |
1220 | int posn = 0; | |
1221 | struct http_object_request *freq = | |
1222 | (struct http_object_request *)data; | |
1223 | do { | |
1224 | ssize_t retval = xwrite(freq->localfile, | |
1225 | (char *) ptr + posn, size - posn); | |
1226 | if (retval < 0) | |
1227 | return posn; | |
1228 | posn += retval; | |
1229 | } while (posn < size); | |
1230 | ||
1231 | freq->stream.avail_in = size; | |
1232 | freq->stream.next_in = (void *)ptr; | |
1233 | do { | |
1234 | freq->stream.next_out = expn; | |
1235 | freq->stream.avail_out = sizeof(expn); | |
1236 | freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH); | |
1237 | git_SHA1_Update(&freq->c, expn, | |
1238 | sizeof(expn) - freq->stream.avail_out); | |
1239 | } while (freq->stream.avail_in && freq->zret == Z_OK); | |
1240 | return size; | |
1241 | } | |
1242 | ||
1243 | struct http_object_request *new_http_object_request(const char *base_url, | |
1244 | unsigned char *sha1) | |
1245 | { | |
1246 | char *hex = sha1_to_hex(sha1); | |
1247 | char *filename; | |
1248 | char prevfile[PATH_MAX]; | |
1249 | int prevlocal; | |
1250 | char prev_buf[PREV_BUF_SIZE]; | |
1251 | ssize_t prev_read = 0; | |
1252 | long prev_posn = 0; | |
1253 | char range[RANGE_HEADER_SIZE]; | |
1254 | struct curl_slist *range_header = NULL; | |
1255 | struct http_object_request *freq; | |
1256 | ||
1257 | freq = xcalloc(1, sizeof(*freq)); | |
1258 | hashcpy(freq->sha1, sha1); | |
1259 | freq->localfile = -1; | |
1260 | ||
1261 | filename = sha1_file_name(sha1); | |
1262 | snprintf(freq->tmpfile, sizeof(freq->tmpfile), | |
1263 | "%s.temp", filename); | |
1264 | ||
1265 | snprintf(prevfile, sizeof(prevfile), "%s.prev", filename); | |
1266 | unlink_or_warn(prevfile); | |
1267 | rename(freq->tmpfile, prevfile); | |
1268 | unlink_or_warn(freq->tmpfile); | |
1269 | ||
1270 | if (freq->localfile != -1) | |
1271 | error("fd leakage in start: %d", freq->localfile); | |
1272 | freq->localfile = open(freq->tmpfile, | |
1273 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
1274 | /* | |
1275 | * This could have failed due to the "lazy directory creation"; | |
1276 | * try to mkdir the last path component. | |
1277 | */ | |
1278 | if (freq->localfile < 0 && errno == ENOENT) { | |
1279 | char *dir = strrchr(freq->tmpfile, '/'); | |
1280 | if (dir) { | |
1281 | *dir = 0; | |
1282 | mkdir(freq->tmpfile, 0777); | |
1283 | *dir = '/'; | |
1284 | } | |
1285 | freq->localfile = open(freq->tmpfile, | |
1286 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
1287 | } | |
1288 | ||
1289 | if (freq->localfile < 0) { | |
1290 | error("Couldn't create temporary file %s: %s", | |
1291 | freq->tmpfile, strerror(errno)); | |
1292 | goto abort; | |
1293 | } | |
1294 | ||
1295 | git_inflate_init(&freq->stream); | |
1296 | ||
1297 | git_SHA1_Init(&freq->c); | |
1298 | ||
1299 | freq->url = get_remote_object_url(base_url, hex, 0); | |
1300 | ||
1301 | /* | |
1302 | * If a previous temp file is present, process what was already | |
1303 | * fetched. | |
1304 | */ | |
1305 | prevlocal = open(prevfile, O_RDONLY); | |
1306 | if (prevlocal != -1) { | |
1307 | do { | |
1308 | prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE); | |
1309 | if (prev_read>0) { | |
1310 | if (fwrite_sha1_file(prev_buf, | |
1311 | 1, | |
1312 | prev_read, | |
1313 | freq) == prev_read) { | |
1314 | prev_posn += prev_read; | |
1315 | } else { | |
1316 | prev_read = -1; | |
1317 | } | |
1318 | } | |
1319 | } while (prev_read > 0); | |
1320 | close(prevlocal); | |
1321 | } | |
1322 | unlink_or_warn(prevfile); | |
1323 | ||
1324 | /* | |
1325 | * Reset inflate/SHA1 if there was an error reading the previous temp | |
1326 | * file; also rewind to the beginning of the local file. | |
1327 | */ | |
1328 | if (prev_read == -1) { | |
1329 | memset(&freq->stream, 0, sizeof(freq->stream)); | |
1330 | git_inflate_init(&freq->stream); | |
1331 | git_SHA1_Init(&freq->c); | |
1332 | if (prev_posn>0) { | |
1333 | prev_posn = 0; | |
1334 | lseek(freq->localfile, 0, SEEK_SET); | |
1335 | if (ftruncate(freq->localfile, 0) < 0) { | |
1336 | error("Couldn't truncate temporary file %s: %s", | |
1337 | freq->tmpfile, strerror(errno)); | |
1338 | goto abort; | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | freq->slot = get_active_slot(); | |
1344 | ||
1345 | curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq); | |
1346 | curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); | |
1347 | curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr); | |
1348 | curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url); | |
1349 | curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); | |
1350 | ||
1351 | /* | |
1352 | * If we have successfully processed data from a previous fetch | |
1353 | * attempt, only fetch the data we don't already have. | |
1354 | */ | |
1355 | if (prev_posn>0) { | |
1356 | if (http_is_verbose) | |
1357 | fprintf(stderr, | |
1358 | "Resuming fetch of object %s at byte %ld\n", | |
1359 | hex, prev_posn); | |
1360 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
1361 | range_header = curl_slist_append(range_header, range); | |
1362 | curl_easy_setopt(freq->slot->curl, | |
1363 | CURLOPT_HTTPHEADER, range_header); | |
1364 | } | |
1365 | ||
1366 | return freq; | |
1367 | ||
1368 | abort: | |
1369 | free(freq->url); | |
1370 | free(freq); | |
1371 | return NULL; | |
1372 | } | |
1373 | ||
1374 | void process_http_object_request(struct http_object_request *freq) | |
1375 | { | |
1376 | if (freq->slot == NULL) | |
1377 | return; | |
1378 | freq->curl_result = freq->slot->curl_result; | |
1379 | freq->http_code = freq->slot->http_code; | |
1380 | freq->slot = NULL; | |
1381 | } | |
1382 | ||
1383 | int finish_http_object_request(struct http_object_request *freq) | |
1384 | { | |
1385 | struct stat st; | |
1386 | ||
1387 | close(freq->localfile); | |
1388 | freq->localfile = -1; | |
1389 | ||
1390 | process_http_object_request(freq); | |
1391 | ||
1392 | if (freq->http_code == 416) { | |
1393 | warning("requested range invalid; we may already have all the data."); | |
1394 | } else if (freq->curl_result != CURLE_OK) { | |
1395 | if (stat(freq->tmpfile, &st) == 0) | |
1396 | if (st.st_size == 0) | |
1397 | unlink_or_warn(freq->tmpfile); | |
1398 | return -1; | |
1399 | } | |
1400 | ||
1401 | git_inflate_end(&freq->stream); | |
1402 | git_SHA1_Final(freq->real_sha1, &freq->c); | |
1403 | if (freq->zret != Z_STREAM_END) { | |
1404 | unlink_or_warn(freq->tmpfile); | |
1405 | return -1; | |
1406 | } | |
1407 | if (hashcmp(freq->sha1, freq->real_sha1)) { | |
1408 | unlink_or_warn(freq->tmpfile); | |
1409 | return -1; | |
1410 | } | |
1411 | freq->rename = | |
1412 | move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1)); | |
1413 | ||
1414 | return freq->rename; | |
1415 | } | |
1416 | ||
1417 | void abort_http_object_request(struct http_object_request *freq) | |
1418 | { | |
1419 | unlink_or_warn(freq->tmpfile); | |
1420 | ||
1421 | release_http_object_request(freq); | |
1422 | } | |
1423 | ||
1424 | void release_http_object_request(struct http_object_request *freq) | |
1425 | { | |
1426 | if (freq->localfile != -1) { | |
1427 | close(freq->localfile); | |
1428 | freq->localfile = -1; | |
1429 | } | |
1430 | if (freq->url != NULL) { | |
1431 | free(freq->url); | |
1432 | freq->url = NULL; | |
1433 | } | |
1434 | if (freq->slot != NULL) { | |
1435 | freq->slot->callback_func = NULL; | |
1436 | freq->slot->callback_data = NULL; | |
1437 | release_active_slot(freq->slot); | |
1438 | freq->slot = NULL; | |
1439 | } | |
1440 | } |