Merge branch 'wk/doc-git-has-grown' into maint
[git] / http.c
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 }