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