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