http: enable keepalive on TCP sockets
[git/git.git] / http.c
CommitLineData
29508e1e 1#include "http.h"
2264dfa5 2#include "pack.h"
de1a2fdd 3#include "sideband.h"
fe72d420 4#include "run-command.h"
f39f72d8 5#include "url.h"
29508e1e
NH
6
7int data_received;
4251ccbd 8int active_requests;
e9176745 9int http_is_verbose;
de1a2fdd 10size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
29508e1e 11
b8ac9230
MS
12#if LIBCURL_VERSION_NUM >= 0x070a06
13#define LIBCURL_CAN_HANDLE_AUTH_ANY
14#endif
15
ad75ebe5
TRC
16static int min_curl_sessions = 1;
17static int curl_session_count;
29508e1e 18#ifdef USE_CURL_MULTI
cc3530e8
MH
19static int max_requests = -1;
20static CURLM *curlm;
29508e1e
NH
21#endif
22#ifndef NO_CURL_EASY_DUPHANDLE
cc3530e8 23static CURL *curl_default;
29508e1e 24#endif
5424bc55
TRC
25
26#define PREV_BUF_SIZE 4096
27#define RANGE_HEADER_SIZE 30
28
29508e1e
NH
29char curl_errorstr[CURL_ERROR_SIZE];
30
cc3530e8 31static int curl_ssl_verify = -1;
4251ccbd 32static const char *ssl_cert;
ef52aafa 33#if LIBCURL_VERSION_NUM >= 0x070903
4251ccbd 34static const char *ssl_key;
29508e1e
NH
35#endif
36#if LIBCURL_VERSION_NUM >= 0x070908
4251ccbd 37static const char *ssl_capath;
29508e1e 38#endif
4251ccbd 39static const char *ssl_cainfo;
cc3530e8
MH
40static long curl_low_speed_limit = -1;
41static long curl_low_speed_time = -1;
4251ccbd
JH
42static int curl_ftp_no_epsv;
43static const char *curl_http_proxy;
c33976cb 44static char *user_name, *user_pass;
b1d1058c 45static const char *user_agent;
29508e1e 46
30dd9163
ML
47#if LIBCURL_VERSION_NUM >= 0x071700
48/* Use CURLOPT_KEYPASSWD as is */
49#elif LIBCURL_VERSION_NUM >= 0x070903
50#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
51#else
52#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
53#endif
54
55static char *ssl_cert_password;
56static int ssl_cert_password_required;
57
cc3530e8 58static struct curl_slist *pragma_header;
5424bc55 59static struct curl_slist *no_pragma_header;
e9176745 60
4251ccbd 61static struct active_request_slot *active_queue_head;
29508e1e 62
a04ff3ec 63size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
29508e1e
NH
64{
65 size_t size = eltsize * nmemb;
f444e528
JH
66 struct buffer *buffer = buffer_;
67
028c2976
MH
68 if (size > buffer->buf.len - buffer->posn)
69 size = buffer->buf.len - buffer->posn;
70 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
29508e1e 71 buffer->posn += size;
028c2976 72
29508e1e
NH
73 return size;
74}
75
3944ba0c
MS
76#ifndef NO_CURL_IOCTL
77curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
78{
79 struct buffer *buffer = clientp;
80
81 switch (cmd) {
82 case CURLIOCMD_NOP:
83 return CURLIOE_OK;
84
85 case CURLIOCMD_RESTARTREAD:
86 buffer->posn = 0;
87 return CURLIOE_OK;
88
89 default:
90 return CURLIOE_UNKNOWNCMD;
91 }
92}
93#endif
94
a04ff3ec 95size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
29508e1e
NH
96{
97 size_t size = eltsize * nmemb;
f444e528
JH
98 struct strbuf *buffer = buffer_;
99
028c2976 100 strbuf_add(buffer, ptr, size);
29508e1e
NH
101 data_received++;
102 return size;
103}
104
a04ff3ec 105size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
29508e1e
NH
106{
107 data_received++;
108 return eltsize * nmemb;
109}
110
29508e1e
NH
111#ifdef USE_CURL_MULTI
112static void process_curl_messages(void)
113{
114 int num_messages;
115 struct active_request_slot *slot;
116 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
117
118 while (curl_message != NULL) {
119 if (curl_message->msg == CURLMSG_DONE) {
120 int curl_result = curl_message->data.result;
121 slot = active_queue_head;
122 while (slot != NULL &&
123 slot->curl != curl_message->easy_handle)
124 slot = slot->next;
125 if (slot != NULL) {
126 curl_multi_remove_handle(curlm, slot->curl);
127 slot->curl_result = curl_result;
128 finish_active_slot(slot);
129 } else {
130 fprintf(stderr, "Received DONE message for unknown request!\n");
131 }
132 } else {
133 fprintf(stderr, "Unknown CURL message received: %d\n",
134 (int)curl_message->msg);
135 }
136 curl_message = curl_multi_info_read(curlm, &num_messages);
137 }
138}
139#endif
140
ef90d6d4 141static int http_options(const char *var, const char *value, void *cb)
29508e1e
NH
142{
143 if (!strcmp("http.sslverify", var)) {
7059cd99 144 curl_ssl_verify = git_config_bool(var, value);
29508e1e
NH
145 return 0;
146 }
7059cd99
JH
147 if (!strcmp("http.sslcert", var))
148 return git_config_string(&ssl_cert, var, value);
ef52aafa 149#if LIBCURL_VERSION_NUM >= 0x070903
7059cd99
JH
150 if (!strcmp("http.sslkey", var))
151 return git_config_string(&ssl_key, var, value);
29508e1e
NH
152#endif
153#if LIBCURL_VERSION_NUM >= 0x070908
7059cd99
JH
154 if (!strcmp("http.sslcapath", var))
155 return git_config_string(&ssl_capath, var, value);
29508e1e 156#endif
7059cd99
JH
157 if (!strcmp("http.sslcainfo", var))
158 return git_config_string(&ssl_cainfo, var, value);
754ae192
ML
159 if (!strcmp("http.sslcertpasswordprotected", var)) {
160 if (git_config_bool(var, value))
161 ssl_cert_password_required = 1;
162 return 0;
163 }
ad75ebe5
TRC
164 if (!strcmp("http.minsessions", var)) {
165 min_curl_sessions = git_config_int(var, value);
166#ifndef USE_CURL_MULTI
167 if (min_curl_sessions > 1)
168 min_curl_sessions = 1;
169#endif
170 return 0;
171 }
a6080a0a 172#ifdef USE_CURL_MULTI
29508e1e 173 if (!strcmp("http.maxrequests", var)) {
7059cd99 174 max_requests = git_config_int(var, value);
29508e1e
NH
175 return 0;
176 }
177#endif
29508e1e 178 if (!strcmp("http.lowspeedlimit", var)) {
7059cd99 179 curl_low_speed_limit = (long)git_config_int(var, value);
29508e1e
NH
180 return 0;
181 }
182 if (!strcmp("http.lowspeedtime", var)) {
7059cd99 183 curl_low_speed_time = (long)git_config_int(var, value);
29508e1e
NH
184 return 0;
185 }
186
3ea099d4
SK
187 if (!strcmp("http.noepsv", var)) {
188 curl_ftp_no_epsv = git_config_bool(var, value);
189 return 0;
190 }
7059cd99
JH
191 if (!strcmp("http.proxy", var))
192 return git_config_string(&curl_http_proxy, var, value);
3ea099d4 193
de1a2fdd
SP
194 if (!strcmp("http.postbuffer", var)) {
195 http_post_buffer = git_config_int(var, value);
196 if (http_post_buffer < LARGE_PACKET_MAX)
197 http_post_buffer = LARGE_PACKET_MAX;
198 return 0;
199 }
200
b1d1058c
SO
201 if (!strcmp("http.useragent", var))
202 return git_config_string(&user_agent, var, value);
203
29508e1e 204 /* Fall back on the default ones */
ef90d6d4 205 return git_default_config(var, value, cb);
29508e1e
NH
206}
207
c33976cb
JH
208static void init_curl_http_auth(CURL *result)
209{
750d9305 210 if (user_name) {
c33976cb
JH
211 struct strbuf up = STRBUF_INIT;
212 if (!user_pass)
f206063b 213 user_pass = xstrdup(git_getpass("Password: "));
c33976cb
JH
214 strbuf_addf(&up, "%s:%s", user_name, user_pass);
215 curl_easy_setopt(result, CURLOPT_USERPWD,
216 strbuf_detach(&up, NULL));
217 }
218}
219
30dd9163
ML
220static int has_cert_password(void)
221{
222 if (ssl_cert_password != NULL)
223 return 1;
224 if (ssl_cert == NULL || ssl_cert_password_required != 1)
225 return 0;
226 /* Only prompt the user once. */
227 ssl_cert_password_required = -1;
f206063b 228 ssl_cert_password = git_getpass("Certificate Password: ");
30dd9163
ML
229 if (ssl_cert_password != NULL) {
230 ssl_cert_password = xstrdup(ssl_cert_password);
231 return 1;
232 } else
233 return 0;
234}
235
a15d069a
EW
236/* curl 7.25.0 has CURLOPT_TCP_KEEPALIVE, too, but we support older curl */
237static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
238{
239 int ka = 1;
240 int rc;
241 socklen_t len = (socklen_t)sizeof(ka);
242
243 if (type != CURLSOCKTYPE_IPCXN)
244 return 0;
245
246 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
247 if (rc < 0)
248 warning("unable to set SO_KEEPALIVE on socket %s",
249 strerror(errno));
250
251 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
252}
253
4251ccbd 254static CURL *get_curl_handle(void)
11979b98 255{
4251ccbd 256 CURL *result = curl_easy_init();
11979b98 257
a5ccc597
JH
258 if (!curl_ssl_verify) {
259 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
260 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
261 } else {
262 /* Verify authenticity of the peer's certificate */
263 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
264 /* The name in the cert must match whom we tried to connect */
265 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
266 }
267
11979b98
JH
268#if LIBCURL_VERSION_NUM >= 0x070907
269 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
270#endif
b8ac9230 271#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
525ecd26 272 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
b8ac9230 273#endif
11979b98 274
c33976cb
JH
275 init_curl_http_auth(result);
276
11979b98
JH
277 if (ssl_cert != NULL)
278 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
30dd9163
ML
279 if (has_cert_password())
280 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
ef52aafa 281#if LIBCURL_VERSION_NUM >= 0x070903
11979b98
JH
282 if (ssl_key != NULL)
283 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
284#endif
285#if LIBCURL_VERSION_NUM >= 0x070908
286 if (ssl_capath != NULL)
287 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
288#endif
289 if (ssl_cainfo != NULL)
290 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
291 curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
292
293 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
294 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
295 curl_low_speed_limit);
296 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
297 curl_low_speed_time);
298 }
299
300 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
311e2ea0
TRC
301#if LIBCURL_VERSION_NUM >= 0x071301
302 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
303#elif LIBCURL_VERSION_NUM >= 0x071101
304 curl_easy_setopt(result, CURLOPT_POST301, 1);
305#endif
11979b98 306
7982d74e
MW
307 if (getenv("GIT_CURL_VERBOSE"))
308 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
309
b1d1058c
SO
310 curl_easy_setopt(result, CURLOPT_USERAGENT,
311 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
20fc9bc5 312
3ea099d4
SK
313 if (curl_ftp_no_epsv)
314 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
315
9c5665aa
SV
316 if (curl_http_proxy)
317 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
318
a15d069a
EW
319#if LIBCURL_VERSION_NUM >= 0x071000
320 curl_easy_setopt(result, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
321#endif
322
11979b98
JH
323 return result;
324}
325
c33976cb
JH
326static void http_auth_init(const char *url)
327{
f39f72d8 328 char *at, *colon, *cp, *slash, *decoded;
c33976cb
JH
329 int len;
330
331 cp = strstr(url, "://");
332 if (!cp)
333 return;
334
335 /*
336 * Ok, the URL looks like "proto://something". Which one?
337 * "proto://<user>:<pass>@<host>/...",
338 * "proto://<user>@<host>/...", or just
339 * "proto://<host>/..."?
340 */
341 cp += 3;
342 at = strchr(cp, '@');
343 colon = strchr(cp, ':');
344 slash = strchrnul(cp, '/');
345 if (!at || slash <= at)
346 return; /* No credentials */
347 if (!colon || at <= colon) {
348 /* Only username */
349 len = at - cp;
350 user_name = xmalloc(len + 1);
351 memcpy(user_name, cp, len);
352 user_name[len] = '\0';
f39f72d8
GC
353 decoded = url_decode(user_name);
354 free(user_name);
355 user_name = decoded;
c33976cb
JH
356 user_pass = NULL;
357 } else {
358 len = colon - cp;
359 user_name = xmalloc(len + 1);
360 memcpy(user_name, cp, len);
361 user_name[len] = '\0';
f39f72d8
GC
362 decoded = url_decode(user_name);
363 free(user_name);
364 user_name = decoded;
c33976cb
JH
365 len = at - (colon + 1);
366 user_pass = xmalloc(len + 1);
367 memcpy(user_pass, colon + 1, len);
368 user_pass[len] = '\0';
f39f72d8
GC
369 decoded = url_decode(user_pass);
370 free(user_pass);
371 user_pass = decoded;
c33976cb
JH
372 }
373}
374
7059cd99
JH
375static void set_from_env(const char **var, const char *envname)
376{
377 const char *val = getenv(envname);
378 if (val)
379 *var = val;
380}
381
9fc6440d 382void http_init(struct remote *remote)
29508e1e
NH
383{
384 char *low_speed_limit;
385 char *low_speed_time;
386
e9176745
TRC
387 http_is_verbose = 0;
388
7059cd99
JH
389 git_config(http_options, NULL);
390
29508e1e
NH
391 curl_global_init(CURL_GLOBAL_ALL);
392
9fc6440d
MH
393 if (remote && remote->http_proxy)
394 curl_http_proxy = xstrdup(remote->http_proxy);
395
29508e1e 396 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
e9176745 397 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
29508e1e
NH
398
399#ifdef USE_CURL_MULTI
400 {
401 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
402 if (http_max_requests != NULL)
403 max_requests = atoi(http_max_requests);
404 }
405
406 curlm = curl_multi_init();
407 if (curlm == NULL) {
408 fprintf(stderr, "Error creating curl multi handle.\n");
409 exit(1);
410 }
411#endif
412
413 if (getenv("GIT_SSL_NO_VERIFY"))
414 curl_ssl_verify = 0;
415
7059cd99 416 set_from_env(&ssl_cert, "GIT_SSL_CERT");
ef52aafa 417#if LIBCURL_VERSION_NUM >= 0x070903
7059cd99 418 set_from_env(&ssl_key, "GIT_SSL_KEY");
29508e1e
NH
419#endif
420#if LIBCURL_VERSION_NUM >= 0x070908
7059cd99 421 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
29508e1e 422#endif
7059cd99 423 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
29508e1e 424
b1d1058c
SO
425 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
426
29508e1e
NH
427 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
428 if (low_speed_limit != NULL)
429 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
430 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
431 if (low_speed_time != NULL)
432 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
433
29508e1e
NH
434 if (curl_ssl_verify == -1)
435 curl_ssl_verify = 1;
436
ad75ebe5 437 curl_session_count = 0;
29508e1e
NH
438#ifdef USE_CURL_MULTI
439 if (max_requests < 1)
440 max_requests = DEFAULT_MAX_REQUESTS;
441#endif
442
3ea099d4
SK
443 if (getenv("GIT_CURL_FTP_NO_EPSV"))
444 curl_ftp_no_epsv = 1;
445
30dd9163 446 if (remote && remote->url && remote->url[0]) {
c33976cb 447 http_auth_init(remote->url[0]);
754ae192
ML
448 if (!ssl_cert_password_required &&
449 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
450 !prefixcmp(remote->url[0], "https://"))
30dd9163
ML
451 ssl_cert_password_required = 1;
452 }
c33976cb 453
29508e1e
NH
454#ifndef NO_CURL_EASY_DUPHANDLE
455 curl_default = get_curl_handle();
456#endif
457}
458
459void http_cleanup(void)
460{
461 struct active_request_slot *slot = active_queue_head;
29508e1e
NH
462
463 while (slot != NULL) {
3278cd0a 464 struct active_request_slot *next = slot->next;
f23d1f76 465 if (slot->curl != NULL) {
29508e1e 466#ifdef USE_CURL_MULTI
f23d1f76 467 curl_multi_remove_handle(curlm, slot->curl);
29508e1e 468#endif
29508e1e 469 curl_easy_cleanup(slot->curl);
f23d1f76 470 }
3278cd0a
SP
471 free(slot);
472 slot = next;
29508e1e 473 }
3278cd0a 474 active_queue_head = NULL;
29508e1e
NH
475
476#ifndef NO_CURL_EASY_DUPHANDLE
477 curl_easy_cleanup(curl_default);
478#endif
479
480#ifdef USE_CURL_MULTI
481 curl_multi_cleanup(curlm);
482#endif
483 curl_global_cleanup();
b3ca4e4e
NH
484
485 curl_slist_free_all(pragma_header);
3278cd0a 486 pragma_header = NULL;
9fc6440d 487
e9176745
TRC
488 curl_slist_free_all(no_pragma_header);
489 no_pragma_header = NULL;
490
9fc6440d 491 if (curl_http_proxy) {
e4a80ecf 492 free((void *)curl_http_proxy);
9fc6440d
MH
493 curl_http_proxy = NULL;
494 }
30dd9163
ML
495
496 if (ssl_cert_password != NULL) {
497 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
498 free(ssl_cert_password);
499 ssl_cert_password = NULL;
500 }
501 ssl_cert_password_required = 0;
29508e1e
NH
502}
503
29508e1e
NH
504struct active_request_slot *get_active_slot(void)
505{
506 struct active_request_slot *slot = active_queue_head;
507 struct active_request_slot *newslot;
508
509#ifdef USE_CURL_MULTI
510 int num_transfers;
511
512 /* Wait for a slot to open up if the queue is full */
513 while (active_requests >= max_requests) {
514 curl_multi_perform(curlm, &num_transfers);
4251ccbd 515 if (num_transfers < active_requests)
29508e1e 516 process_curl_messages();
29508e1e
NH
517 }
518#endif
519
4251ccbd 520 while (slot != NULL && slot->in_use)
29508e1e 521 slot = slot->next;
4251ccbd 522
29508e1e
NH
523 if (slot == NULL) {
524 newslot = xmalloc(sizeof(*newslot));
525 newslot->curl = NULL;
526 newslot->in_use = 0;
527 newslot->next = NULL;
528
529 slot = active_queue_head;
530 if (slot == NULL) {
531 active_queue_head = newslot;
532 } else {
4251ccbd 533 while (slot->next != NULL)
29508e1e 534 slot = slot->next;
29508e1e
NH
535 slot->next = newslot;
536 }
537 slot = newslot;
538 }
539
540 if (slot->curl == NULL) {
541#ifdef NO_CURL_EASY_DUPHANDLE
542 slot->curl = get_curl_handle();
543#else
544 slot->curl = curl_easy_duphandle(curl_default);
545#endif
ad75ebe5 546 curl_session_count++;
29508e1e
NH
547 }
548
549 active_requests++;
550 slot->in_use = 1;
551 slot->local = NULL;
c8568e13 552 slot->results = NULL;
baa7b67d 553 slot->finished = NULL;
29508e1e
NH
554 slot->callback_data = NULL;
555 slot->callback_func = NULL;
556 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
29508e1e 557 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
9094950d
NH
558 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
559 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
560 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1e41827d 561 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
9094950d
NH
562 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
563 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
29508e1e
NH
564
565 return slot;
566}
567
568int start_active_slot(struct active_request_slot *slot)
569{
570#ifdef USE_CURL_MULTI
571 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
45c17412 572 int num_transfers;
29508e1e
NH
573
574 if (curlm_result != CURLM_OK &&
575 curlm_result != CURLM_CALL_MULTI_PERFORM) {
576 active_requests--;
577 slot->in_use = 0;
578 return 0;
579 }
45c17412
DB
580
581 /*
582 * We know there must be something to do, since we just added
583 * something.
584 */
585 curl_multi_perform(curlm, &num_transfers);
29508e1e
NH
586#endif
587 return 1;
588}
589
590#ifdef USE_CURL_MULTI
fc57b6aa
DB
591struct fill_chain {
592 void *data;
593 int (*fill)(void *);
594 struct fill_chain *next;
595};
596
4251ccbd 597static struct fill_chain *fill_cfg;
fc57b6aa
DB
598
599void add_fill_function(void *data, int (*fill)(void *))
600{
e8eec71d 601 struct fill_chain *new = xmalloc(sizeof(*new));
fc57b6aa
DB
602 struct fill_chain **linkp = &fill_cfg;
603 new->data = data;
604 new->fill = fill;
605 new->next = NULL;
606 while (*linkp)
607 linkp = &(*linkp)->next;
608 *linkp = new;
609}
610
45c17412
DB
611void fill_active_slots(void)
612{
613 struct active_request_slot *slot = active_queue_head;
614
fc57b6aa
DB
615 while (active_requests < max_requests) {
616 struct fill_chain *fill;
617 for (fill = fill_cfg; fill; fill = fill->next)
618 if (fill->fill(fill->data))
619 break;
620
621 if (!fill)
45c17412 622 break;
fc57b6aa 623 }
45c17412
DB
624
625 while (slot != NULL) {
ad75ebe5
TRC
626 if (!slot->in_use && slot->curl != NULL
627 && curl_session_count > min_curl_sessions) {
45c17412
DB
628 curl_easy_cleanup(slot->curl);
629 slot->curl = NULL;
ad75ebe5 630 curl_session_count--;
45c17412
DB
631 }
632 slot = slot->next;
633 }
634}
635
29508e1e
NH
636void step_active_slots(void)
637{
638 int num_transfers;
639 CURLMcode curlm_result;
640
641 do {
642 curlm_result = curl_multi_perform(curlm, &num_transfers);
643 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
644 if (num_transfers < active_requests) {
645 process_curl_messages();
646 fill_active_slots();
647 }
648}
649#endif
650
651void run_active_slot(struct active_request_slot *slot)
652{
653#ifdef USE_CURL_MULTI
654 long last_pos = 0;
655 long current_pos;
656 fd_set readfds;
657 fd_set writefds;
658 fd_set excfds;
659 int max_fd;
660 struct timeval select_timeout;
baa7b67d 661 int finished = 0;
29508e1e 662
baa7b67d
NH
663 slot->finished = &finished;
664 while (!finished) {
29508e1e
NH
665 data_received = 0;
666 step_active_slots();
667
668 if (!data_received && slot->local != NULL) {
669 current_pos = ftell(slot->local);
670 if (current_pos > last_pos)
671 data_received++;
672 last_pos = current_pos;
673 }
674
675 if (slot->in_use && !data_received) {
676 max_fd = 0;
677 FD_ZERO(&readfds);
678 FD_ZERO(&writefds);
679 FD_ZERO(&excfds);
680 select_timeout.tv_sec = 0;
681 select_timeout.tv_usec = 50000;
682 select(max_fd, &readfds, &writefds,
683 &excfds, &select_timeout);
684 }
685 }
686#else
687 while (slot->in_use) {
688 slot->curl_result = curl_easy_perform(slot->curl);
689 finish_active_slot(slot);
690 }
691#endif
692}
693
53f31389 694static void closedown_active_slot(struct active_request_slot *slot)
29508e1e 695{
028c2976
MH
696 active_requests--;
697 slot->in_use = 0;
53f31389
MW
698}
699
83e41e2e 700static void release_active_slot(struct active_request_slot *slot)
53f31389
MW
701{
702 closedown_active_slot(slot);
ad75ebe5 703 if (slot->curl && curl_session_count > min_curl_sessions) {
b3ca4e4e 704#ifdef USE_CURL_MULTI
53f31389 705 curl_multi_remove_handle(curlm, slot->curl);
b3ca4e4e 706#endif
53f31389
MW
707 curl_easy_cleanup(slot->curl);
708 slot->curl = NULL;
ad75ebe5 709 curl_session_count--;
53f31389 710 }
b3ca4e4e 711#ifdef USE_CURL_MULTI
53f31389 712 fill_active_slots();
b3ca4e4e 713#endif
53f31389
MW
714}
715
de1a2fdd 716void finish_active_slot(struct active_request_slot *slot)
53f31389
MW
717{
718 closedown_active_slot(slot);
028c2976 719 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
c8568e13 720
baa7b67d
NH
721 if (slot->finished != NULL)
722 (*slot->finished) = 1;
723
c8568e13
NH
724 /* Store slot results so they can be read after the slot is reused */
725 if (slot->results != NULL) {
726 slot->results->curl_result = slot->curl_result;
727 slot->results->http_code = slot->http_code;
728 }
729
028c2976 730 /* Run callback if appropriate */
4251ccbd 731 if (slot->callback_func != NULL)
028c2976 732 slot->callback_func(slot->callback_data);
29508e1e
NH
733}
734
735void finish_all_active_slots(void)
736{
737 struct active_request_slot *slot = active_queue_head;
738
739 while (slot != NULL)
740 if (slot->in_use) {
741 run_active_slot(slot);
742 slot = active_queue_head;
743 } else {
744 slot = slot->next;
745 }
746}
d7e92806 747
5ace994f 748/* Helpers for modifying and creating URLs */
d7e92806
MH
749static inline int needs_quote(int ch)
750{
751 if (((ch >= 'A') && (ch <= 'Z'))
752 || ((ch >= 'a') && (ch <= 'z'))
753 || ((ch >= '0') && (ch <= '9'))
754 || (ch == '/')
755 || (ch == '-')
756 || (ch == '.'))
757 return 0;
758 return 1;
759}
760
761static inline int hex(int v)
762{
4251ccbd
JH
763 if (v < 10)
764 return '0' + v;
765 else
766 return 'A' + v - 10;
d7e92806
MH
767}
768
769static char *quote_ref_url(const char *base, const char *ref)
770{
113106e0 771 struct strbuf buf = STRBUF_INIT;
d7e92806 772 const char *cp;
113106e0 773 int ch;
d7e92806 774
5ace994f 775 end_url_with_slash(&buf, base);
113106e0
TRC
776
777 for (cp = ref; (ch = *cp) != 0; cp++)
d7e92806 778 if (needs_quote(ch))
113106e0 779 strbuf_addf(&buf, "%%%02x", ch);
d7e92806 780 else
113106e0 781 strbuf_addch(&buf, *cp);
d7e92806 782
113106e0 783 return strbuf_detach(&buf, NULL);
d7e92806
MH
784}
785
5424bc55
TRC
786void append_remote_object_url(struct strbuf *buf, const char *url,
787 const char *hex,
788 int only_two_digit_prefix)
789{
800324c3
TRC
790 end_url_with_slash(buf, url);
791
792 strbuf_addf(buf, "objects/%.*s/", 2, hex);
5424bc55
TRC
793 if (!only_two_digit_prefix)
794 strbuf_addf(buf, "%s", hex+2);
795}
796
797char *get_remote_object_url(const char *url, const char *hex,
798 int only_two_digit_prefix)
799{
800 struct strbuf buf = STRBUF_INIT;
801 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
802 return strbuf_detach(&buf, NULL);
803}
804
e929cd20
MH
805/* http_request() targets */
806#define HTTP_REQUEST_STRBUF 0
807#define HTTP_REQUEST_FILE 1
808
809static int http_request(const char *url, void *result, int target, int options)
810{
811 struct active_request_slot *slot;
812 struct slot_results results;
813 struct curl_slist *headers = NULL;
814 struct strbuf buf = STRBUF_INIT;
815 int ret;
816
817 slot = get_active_slot();
818 slot->results = &results;
819 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
820
821 if (result == NULL) {
822 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
823 } else {
824 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
825 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
826
827 if (target == HTTP_REQUEST_FILE) {
828 long posn = ftell(result);
829 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
830 fwrite);
831 if (posn > 0) {
832 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
833 headers = curl_slist_append(headers, buf.buf);
834 strbuf_reset(&buf);
835 }
836 slot->local = result;
837 } else
838 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
839 fwrite_buffer);
840 }
841
842 strbuf_addstr(&buf, "Pragma:");
843 if (options & HTTP_NO_CACHE)
844 strbuf_addstr(&buf, " no-cache");
845
846 headers = curl_slist_append(headers, buf.buf);
847
848 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
849 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
850
851 if (start_active_slot(slot)) {
852 run_active_slot(slot);
853 if (results.curl_result == CURLE_OK)
854 ret = HTTP_OK;
855 else if (missing_target(&results))
856 ret = HTTP_MISSING_TARGET;
42653c09
SC
857 else if (results.http_code == 401) {
858 if (user_name) {
859 ret = HTTP_NOAUTH;
860 } else {
861 /*
862 * git_getpass is needed here because its very likely stdin/stdout are
863 * pipes to our parent process. So we instead need to use /dev/tty,
864 * but that is non-portable. Using git_getpass() can at least be stubbed
865 * on other platforms with a different implementation if/when necessary.
866 */
867 user_name = xstrdup(git_getpass("Username: "));
868 init_curl_http_auth(slot->curl);
869 ret = HTTP_REAUTH;
870 }
871 } else
e929cd20
MH
872 ret = HTTP_ERROR;
873 } else {
874 error("Unable to start HTTP request for %s", url);
875 ret = HTTP_START_FAILED;
876 }
877
878 slot->local = NULL;
879 curl_slist_free_all(headers);
880 strbuf_release(&buf);
881
882 return ret;
883}
884
885int http_get_strbuf(const char *url, struct strbuf *result, int options)
886{
42653c09
SC
887 int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
888 if (http_ret == HTTP_REAUTH) {
889 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
890 }
891 return http_ret;
e929cd20
MH
892}
893
83e41e2e
JH
894/*
895 * Downloads an url and stores the result in the given file.
896 *
897 * If a previous interrupted download is detected (i.e. a previous temporary
898 * file is still around) the download is resumed.
899 */
900static int http_get_file(const char *url, const char *filename, int options)
e929cd20
MH
901{
902 int ret;
903 struct strbuf tmpfile = STRBUF_INIT;
904 FILE *result;
905
906 strbuf_addf(&tmpfile, "%s.temp", filename);
907 result = fopen(tmpfile.buf, "a");
908 if (! result) {
909 error("Unable to open local file %s", tmpfile.buf);
910 ret = HTTP_ERROR;
911 goto cleanup;
912 }
913
914 ret = http_request(url, result, HTTP_REQUEST_FILE, options);
915 fclose(result);
916
917 if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
918 ret = HTTP_ERROR;
919cleanup:
920 strbuf_release(&tmpfile);
921 return ret;
922}
923
924int http_error(const char *url, int ret)
925{
926 /* http_request has already handled HTTP_START_FAILED. */
927 if (ret != HTTP_START_FAILED)
928 error("%s while accessing %s\n", curl_errorstr, url);
929
930 return ret;
931}
932
c13b2633 933int http_fetch_ref(const char *base, struct ref *ref)
d7e92806
MH
934{
935 char *url;
936 struct strbuf buffer = STRBUF_INIT;
0d5896e1 937 int ret = -1;
d7e92806 938
c13b2633 939 url = quote_ref_url(base, ref->name);
0d5896e1
MH
940 if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
941 strbuf_rtrim(&buffer);
942 if (buffer.len == 40)
943 ret = get_sha1_hex(buffer.buf, ref->old_sha1);
944 else if (!prefixcmp(buffer.buf, "ref: ")) {
945 ref->symref = xstrdup(buffer.buf + 5);
946 ret = 0;
d7e92806 947 }
d7e92806
MH
948 }
949
950 strbuf_release(&buffer);
951 free(url);
952 return ret;
953}
b8caac2b
TRC
954
955/* Helpers for fetching packs */
750ef425 956static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
b8caac2b 957{
750ef425 958 char *url, *tmp;
b8caac2b 959 struct strbuf buf = STRBUF_INIT;
b8caac2b 960
b8caac2b 961 if (http_is_verbose)
162eb5f8 962 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
b8caac2b
TRC
963
964 end_url_with_slash(&buf, base_url);
162eb5f8 965 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
b8caac2b
TRC
966 url = strbuf_detach(&buf, NULL);
967
750ef425
SP
968 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
969 tmp = strbuf_detach(&buf, NULL);
970
971 if (http_get_file(url, tmp, 0) != HTTP_OK) {
972 error("Unable to get pack index %s\n", url);
973 free(tmp);
974 tmp = NULL;
975 }
b8caac2b 976
b8caac2b 977 free(url);
750ef425 978 return tmp;
b8caac2b
TRC
979}
980
981static int fetch_and_setup_pack_index(struct packed_git **packs_head,
982 unsigned char *sha1, const char *base_url)
983{
984 struct packed_git *new_pack;
750ef425
SP
985 char *tmp_idx = NULL;
986 int ret;
b8caac2b 987
750ef425
SP
988 if (has_pack_index(sha1)) {
989 new_pack = parse_pack_index(sha1, NULL);
990 if (!new_pack)
991 return -1; /* parse_pack_index() already issued error message */
992 goto add_pack;
993 }
994
995 tmp_idx = fetch_pack_index(sha1, base_url);
996 if (!tmp_idx)
b8caac2b
TRC
997 return -1;
998
750ef425
SP
999 new_pack = parse_pack_index(sha1, tmp_idx);
1000 if (!new_pack) {
1001 unlink(tmp_idx);
1002 free(tmp_idx);
1003
b8caac2b 1004 return -1; /* parse_pack_index() already issued error message */
750ef425
SP
1005 }
1006
1007 ret = verify_pack_index(new_pack);
1008 if (!ret) {
1009 close_pack_index(new_pack);
1010 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1011 }
1012 free(tmp_idx);
1013 if (ret)
1014 return -1;
1015
1016add_pack:
b8caac2b
TRC
1017 new_pack->next = *packs_head;
1018 *packs_head = new_pack;
1019 return 0;
1020}
1021
1022int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1023{
1024 int ret = 0, i = 0;
1025 char *url, *data;
1026 struct strbuf buf = STRBUF_INIT;
1027 unsigned char sha1[20];
1028
1029 end_url_with_slash(&buf, base_url);
1030 strbuf_addstr(&buf, "objects/info/packs");
1031 url = strbuf_detach(&buf, NULL);
1032
1033 ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1034 if (ret != HTTP_OK)
1035 goto cleanup;
1036
1037 data = buf.buf;
1038 while (i < buf.len) {
1039 switch (data[i]) {
1040 case 'P':
1041 i++;
1042 if (i + 52 <= buf.len &&
1043 !prefixcmp(data + i, " pack-") &&
1044 !prefixcmp(data + i + 46, ".pack\n")) {
1045 get_sha1_hex(data + i + 6, sha1);
1046 fetch_and_setup_pack_index(packs_head, sha1,
1047 base_url);
1048 i += 51;
1049 break;
1050 }
1051 default:
1052 while (i < buf.len && data[i] != '\n')
1053 i++;
1054 }
1055 i++;
1056 }
1057
1058cleanup:
1059 free(url);
1060 return ret;
1061}
2264dfa5
TRC
1062
1063void release_http_pack_request(struct http_pack_request *preq)
1064{
1065 if (preq->packfile != NULL) {
1066 fclose(preq->packfile);
1067 preq->packfile = NULL;
1068 preq->slot->local = NULL;
1069 }
1070 if (preq->range_header != NULL) {
1071 curl_slist_free_all(preq->range_header);
1072 preq->range_header = NULL;
1073 }
1074 preq->slot = NULL;
1075 free(preq->url);
1076}
1077
1078int finish_http_pack_request(struct http_pack_request *preq)
1079{
2264dfa5 1080 struct packed_git **lst;
021ab6f0 1081 struct packed_git *p = preq->target;
fe72d420
SP
1082 char *tmp_idx;
1083 struct child_process ip;
1084 const char *ip_argv[8];
2264dfa5 1085
fe72d420 1086 close_pack_index(p);
2264dfa5 1087
3065274c
SP
1088 fclose(preq->packfile);
1089 preq->packfile = NULL;
1090 preq->slot->local = NULL;
2264dfa5
TRC
1091
1092 lst = preq->lst;
021ab6f0 1093 while (*lst != p)
2264dfa5
TRC
1094 lst = &((*lst)->next);
1095 *lst = (*lst)->next;
1096
fe72d420
SP
1097 tmp_idx = xstrdup(preq->tmpfile);
1098 strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1099 ".idx.temp");
1100
1101 ip_argv[0] = "index-pack";
1102 ip_argv[1] = "-o";
1103 ip_argv[2] = tmp_idx;
1104 ip_argv[3] = preq->tmpfile;
1105 ip_argv[4] = NULL;
1106
1107 memset(&ip, 0, sizeof(ip));
1108 ip.argv = ip_argv;
1109 ip.git_cmd = 1;
1110 ip.no_stdin = 1;
1111 ip.no_stdout = 1;
1112
1113 if (run_command(&ip)) {
1114 unlink(preq->tmpfile);
1115 unlink(tmp_idx);
1116 free(tmp_idx);
2264dfa5 1117 return -1;
fe72d420
SP
1118 }
1119
1120 unlink(sha1_pack_index_name(p->sha1));
2264dfa5 1121
fe72d420
SP
1122 if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1123 || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1124 free(tmp_idx);
2264dfa5 1125 return -1;
fe72d420 1126 }
2264dfa5 1127
fe72d420
SP
1128 install_packed_git(p);
1129 free(tmp_idx);
2264dfa5
TRC
1130 return 0;
1131}
1132
1133struct http_pack_request *new_http_pack_request(
1134 struct packed_git *target, const char *base_url)
1135{
2264dfa5
TRC
1136 long prev_posn = 0;
1137 char range[RANGE_HEADER_SIZE];
1138 struct strbuf buf = STRBUF_INIT;
1139 struct http_pack_request *preq;
1140
1141 preq = xmalloc(sizeof(*preq));
1142 preq->target = target;
1143 preq->range_header = NULL;
1144
1145 end_url_with_slash(&buf, base_url);
1146 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1147 sha1_to_hex(target->sha1));
bb99190e 1148 preq->url = strbuf_detach(&buf, NULL);
2264dfa5 1149
90d05713
TRC
1150 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1151 sha1_pack_name(target->sha1));
2264dfa5
TRC
1152 preq->packfile = fopen(preq->tmpfile, "a");
1153 if (!preq->packfile) {
1154 error("Unable to open local file %s for pack",
1155 preq->tmpfile);
1156 goto abort;
1157 }
1158
1159 preq->slot = get_active_slot();
1160 preq->slot->local = preq->packfile;
1161 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1162 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
bb99190e 1163 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2264dfa5
TRC
1164 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1165 no_pragma_header);
1166
1167 /*
1168 * If there is data present from a previous transfer attempt,
1169 * resume where it left off
1170 */
1171 prev_posn = ftell(preq->packfile);
1172 if (prev_posn>0) {
1173 if (http_is_verbose)
1174 fprintf(stderr,
1175 "Resuming fetch of pack %s at byte %ld\n",
1176 sha1_to_hex(target->sha1), prev_posn);
1177 sprintf(range, "Range: bytes=%ld-", prev_posn);
1178 preq->range_header = curl_slist_append(NULL, range);
1179 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1180 preq->range_header);
1181 }
1182
1183 return preq;
1184
1185abort:
bb99190e 1186 free(preq->url);
5ae9ebfd 1187 free(preq);
2264dfa5
TRC
1188 return NULL;
1189}
5424bc55
TRC
1190
1191/* Helpers for fetching objects (loose) */
a04ff3ec 1192static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
5424bc55
TRC
1193 void *data)
1194{
1195 unsigned char expn[4096];
1196 size_t size = eltsize * nmemb;
1197 int posn = 0;
1198 struct http_object_request *freq =
1199 (struct http_object_request *)data;
1200 do {
1201 ssize_t retval = xwrite(freq->localfile,
1202 (char *) ptr + posn, size - posn);
1203 if (retval < 0)
1204 return posn;
1205 posn += retval;
1206 } while (posn < size);
1207
1208 freq->stream.avail_in = size;
a04ff3ec 1209 freq->stream.next_in = (void *)ptr;
5424bc55
TRC
1210 do {
1211 freq->stream.next_out = expn;
1212 freq->stream.avail_out = sizeof(expn);
1213 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1214 git_SHA1_Update(&freq->c, expn,
1215 sizeof(expn) - freq->stream.avail_out);
1216 } while (freq->stream.avail_in && freq->zret == Z_OK);
1217 data_received++;
1218 return size;
1219}
1220
1221struct http_object_request *new_http_object_request(const char *base_url,
1222 unsigned char *sha1)
1223{
1224 char *hex = sha1_to_hex(sha1);
1225 char *filename;
1226 char prevfile[PATH_MAX];
5424bc55 1227 int prevlocal;
a04ff3ec 1228 char prev_buf[PREV_BUF_SIZE];
5424bc55
TRC
1229 ssize_t prev_read = 0;
1230 long prev_posn = 0;
1231 char range[RANGE_HEADER_SIZE];
1232 struct curl_slist *range_header = NULL;
1233 struct http_object_request *freq;
1234
1235 freq = xmalloc(sizeof(*freq));
1236 hashcpy(freq->sha1, sha1);
1237 freq->localfile = -1;
1238
1239 filename = sha1_file_name(sha1);
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TRC
1240 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1241 "%s.temp", filename);
1242
1243 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1244 unlink_or_warn(prevfile);
1245 rename(freq->tmpfile, prevfile);
1246 unlink_or_warn(freq->tmpfile);
1247
1248 if (freq->localfile != -1)
1249 error("fd leakage in start: %d", freq->localfile);
1250 freq->localfile = open(freq->tmpfile,
1251 O_WRONLY | O_CREAT | O_EXCL, 0666);
1252 /*
1253 * This could have failed due to the "lazy directory creation";
1254 * try to mkdir the last path component.
1255 */
1256 if (freq->localfile < 0 && errno == ENOENT) {
1257 char *dir = strrchr(freq->tmpfile, '/');
1258 if (dir) {
1259 *dir = 0;
1260 mkdir(freq->tmpfile, 0777);
1261 *dir = '/';
1262 }
1263 freq->localfile = open(freq->tmpfile,
1264 O_WRONLY | O_CREAT | O_EXCL, 0666);
1265 }
1266
1267 if (freq->localfile < 0) {
0da8b2e7
SP
1268 error("Couldn't create temporary file %s: %s",
1269 freq->tmpfile, strerror(errno));
5424bc55
TRC
1270 goto abort;
1271 }
1272
1273 memset(&freq->stream, 0, sizeof(freq->stream));
1274
1275 git_inflate_init(&freq->stream);
1276
1277 git_SHA1_Init(&freq->c);
1278
bb99190e 1279 freq->url = get_remote_object_url(base_url, hex, 0);
5424bc55
TRC
1280
1281 /*
1282 * If a previous temp file is present, process what was already
1283 * fetched.
1284 */
1285 prevlocal = open(prevfile, O_RDONLY);
1286 if (prevlocal != -1) {
1287 do {
1288 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1289 if (prev_read>0) {
1290 if (fwrite_sha1_file(prev_buf,
1291 1,
1292 prev_read,
1293 freq) == prev_read) {
1294 prev_posn += prev_read;
1295 } else {
1296 prev_read = -1;
1297 }
1298 }
1299 } while (prev_read > 0);
1300 close(prevlocal);
1301 }
1302 unlink_or_warn(prevfile);
1303
1304 /*
1305 * Reset inflate/SHA1 if there was an error reading the previous temp
1306 * file; also rewind to the beginning of the local file.
1307 */
1308 if (prev_read == -1) {
1309 memset(&freq->stream, 0, sizeof(freq->stream));
1310 git_inflate_init(&freq->stream);
1311 git_SHA1_Init(&freq->c);
1312 if (prev_posn>0) {
1313 prev_posn = 0;
1314 lseek(freq->localfile, 0, SEEK_SET);
0c4f21e4 1315 if (ftruncate(freq->localfile, 0) < 0) {
0da8b2e7
SP
1316 error("Couldn't truncate temporary file %s: %s",
1317 freq->tmpfile, strerror(errno));
0c4f21e4
JL
1318 goto abort;
1319 }
5424bc55
TRC
1320 }
1321 }
1322
1323 freq->slot = get_active_slot();
1324
1325 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1326 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1327 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
bb99190e 1328 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
5424bc55
TRC
1329 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1330
1331 /*
1332 * If we have successfully processed data from a previous fetch
1333 * attempt, only fetch the data we don't already have.
1334 */
1335 if (prev_posn>0) {
1336 if (http_is_verbose)
1337 fprintf(stderr,
1338 "Resuming fetch of object %s at byte %ld\n",
1339 hex, prev_posn);
1340 sprintf(range, "Range: bytes=%ld-", prev_posn);
1341 range_header = curl_slist_append(range_header, range);
1342 curl_easy_setopt(freq->slot->curl,
1343 CURLOPT_HTTPHEADER, range_header);
1344 }
1345
1346 return freq;
1347
5424bc55
TRC
1348abort:
1349 free(filename);
bb99190e 1350 free(freq->url);
5424bc55
TRC
1351 free(freq);
1352 return NULL;
1353}
1354
1355void process_http_object_request(struct http_object_request *freq)
1356{
1357 if (freq->slot == NULL)
1358 return;
1359 freq->curl_result = freq->slot->curl_result;
1360 freq->http_code = freq->slot->http_code;
1361 freq->slot = NULL;
1362}
1363
1364int finish_http_object_request(struct http_object_request *freq)
1365{
1366 struct stat st;
1367
1368 close(freq->localfile);
1369 freq->localfile = -1;
1370
1371 process_http_object_request(freq);
1372
1373 if (freq->http_code == 416) {
bd757c18 1374 warning("requested range invalid; we may already have all the data.");
5424bc55
TRC
1375 } else if (freq->curl_result != CURLE_OK) {
1376 if (stat(freq->tmpfile, &st) == 0)
1377 if (st.st_size == 0)
1378 unlink_or_warn(freq->tmpfile);
1379 return -1;
1380 }
1381
1382 git_inflate_end(&freq->stream);
1383 git_SHA1_Final(freq->real_sha1, &freq->c);
1384 if (freq->zret != Z_STREAM_END) {
1385 unlink_or_warn(freq->tmpfile);
1386 return -1;
1387 }
1388 if (hashcmp(freq->sha1, freq->real_sha1)) {
1389 unlink_or_warn(freq->tmpfile);
1390 return -1;
1391 }
1392 freq->rename =
0da8b2e7 1393 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
5424bc55
TRC
1394
1395 return freq->rename;
1396}
1397
1398void abort_http_object_request(struct http_object_request *freq)
1399{
1400 unlink_or_warn(freq->tmpfile);
1401
1402 release_http_object_request(freq);
1403}
1404
1405void release_http_object_request(struct http_object_request *freq)
1406{
1407 if (freq->localfile != -1) {
1408 close(freq->localfile);
1409 freq->localfile = -1;
1410 }
1411 if (freq->url != NULL) {
1412 free(freq->url);
1413 freq->url = NULL;
1414 }
4b9fa0e3
TRC
1415 if (freq->slot != NULL) {
1416 freq->slot->callback_func = NULL;
1417 freq->slot->callback_data = NULL;
1418 release_active_slot(freq->slot);
1419 freq->slot = NULL;
1420 }
5424bc55 1421}