9 #if LIBCURL_VERSION_NUM < 0x070704
10 #define curl_global_cleanup() do { /* nothing */ } while(0)
12 #if LIBCURL_VERSION_NUM < 0x070800
13 #define curl_global_init(a) do { /* nothing */ } while(0)
17 static struct curl_slist *no_pragma_header;
19 static char *initial_base;
25 struct packed_git *packs;
26 struct alt_base *next;
29 struct alt_base *alt = NULL;
32 static z_stream stream;
37 static int curl_ssl_verify;
46 static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
47 struct buffer *buffer)
49 size_t size = eltsize * nmemb;
50 if (size > buffer->size - buffer->posn)
51 size = buffer->size - buffer->posn;
52 memcpy(buffer->buffer + buffer->posn, ptr, size);
57 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
60 unsigned char expn[4096];
61 size_t size = eltsize * nmemb;
64 ssize_t retval = write(local, ptr + posn, size - posn);
68 } while (posn < size);
70 stream.avail_in = size;
73 stream.next_out = expn;
74 stream.avail_out = sizeof(expn);
75 zret = inflate(&stream, Z_SYNC_FLUSH);
76 SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
77 } while (stream.avail_in && zret == Z_OK);
81 void prefetch(unsigned char *sha1)
85 static int got_alternates = 0;
87 static int fetch_index(struct alt_base *repo, unsigned char *sha1)
94 if (has_pack_index(sha1))
98 fprintf(stderr, "Getting index for pack %s\n",
101 url = xmalloc(strlen(repo->base) + 64);
102 sprintf(url, "%s/objects/pack/pack-%s.idx",
103 repo->base, sha1_to_hex(sha1));
105 filename = sha1_pack_index_name(sha1);
106 indexfile = fopen(filename, "w");
108 return error("Unable to open local file %s for pack index",
111 curl_easy_setopt(curl, CURLOPT_FILE, indexfile);
112 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
113 curl_easy_setopt(curl, CURLOPT_URL, url);
114 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
116 if (curl_easy_perform(curl)) {
118 return error("Unable to get pack index %s", url);
125 static int setup_index(struct alt_base *repo, unsigned char *sha1)
127 struct packed_git *new_pack;
128 if (has_pack_file(sha1))
129 return 0; // don't list this as something we can get
131 if (fetch_index(repo, sha1))
134 new_pack = parse_pack_index(sha1);
135 new_pack->next = repo->packs;
136 repo->packs = new_pack;
140 static int fetch_alternates(char *base)
143 struct buffer buffer;
149 data = xmalloc(4096);
152 buffer.buffer = data;
155 fprintf(stderr, "Getting alternates list\n");
157 url = xmalloc(strlen(base) + 31);
158 sprintf(url, "%s/objects/info/http-alternates", base);
160 curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
161 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
162 curl_easy_setopt(curl, CURLOPT_URL, url);
164 if (curl_easy_perform(curl) || !buffer.posn) {
165 sprintf(url, "%s/objects/info/alternates", base);
167 curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
168 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
169 curl_easy_setopt(curl, CURLOPT_URL, url);
171 if (curl_easy_perform(curl)) {
176 while (i < buffer.posn) {
178 while (posn < buffer.posn && data[posn] != '\n')
180 if (data[posn] == '\n') {
181 if (data[i] == '/') {
182 int serverlen = strchr(base + 8, '/') - base;
183 // skip 'objects' at end
185 xmalloc(serverlen + posn - i - 6);
186 struct alt_base *newalt;
187 strncpy(target, base, serverlen);
188 strncpy(target + serverlen, data + i,
190 target[serverlen + posn - i - 7] = '\0';
193 "Also look at %s\n", target);
194 newalt = xmalloc(sizeof(*newalt));
196 newalt->base = target;
197 newalt->got_indices = 0;
198 newalt->packs = NULL;
210 static int fetch_indices(struct alt_base *repo)
212 unsigned char sha1[20];
214 struct buffer buffer;
218 if (repo->got_indices)
221 data = xmalloc(4096);
224 buffer.buffer = data;
227 fprintf(stderr, "Getting pack list\n");
229 url = xmalloc(strlen(repo->base) + 21);
230 sprintf(url, "%s/objects/info/packs", repo->base);
232 curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
233 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
234 curl_easy_setopt(curl, CURLOPT_URL, url);
235 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
237 if (curl_easy_perform(curl)) {
238 return error("Unable to get pack index %s", url);
241 while (i < buffer.posn) {
245 if (i + 52 < buffer.posn &&
246 !strncmp(data + i, " pack-", 6) &&
247 !strncmp(data + i + 46, ".pack\n", 6)) {
248 get_sha1_hex(data + i + 6, sha1);
249 setup_index(repo, sha1);
254 while (data[i] != '\n')
260 repo->got_indices = 1;
264 static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
267 struct packed_git *target;
268 struct packed_git **lst;
272 if (fetch_indices(repo))
274 target = find_sha1_pack(sha1, repo->packs);
279 fprintf(stderr, "Getting pack %s\n",
280 sha1_to_hex(target->sha1));
281 fprintf(stderr, " which contains %s\n",
285 url = xmalloc(strlen(repo->base) + 65);
286 sprintf(url, "%s/objects/pack/pack-%s.pack",
287 repo->base, sha1_to_hex(target->sha1));
289 filename = sha1_pack_name(target->sha1);
290 packfile = fopen(filename, "w");
292 return error("Unable to open local file %s for pack",
295 curl_easy_setopt(curl, CURLOPT_FILE, packfile);
296 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
297 curl_easy_setopt(curl, CURLOPT_URL, url);
298 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
300 if (curl_easy_perform(curl)) {
302 return error("Unable to get pack file %s", url);
308 while (*lst != target)
309 lst = &((*lst)->next);
312 install_packed_git(target);
317 int fetch_object(struct alt_base *repo, unsigned char *sha1)
319 char *hex = sha1_to_hex(sha1);
320 char *filename = sha1_file_name(sha1);
321 unsigned char real_sha1[20];
325 local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
328 return error("Couldn't open local object %s\n", filename);
330 memset(&stream, 0, sizeof(stream));
332 inflateInit(&stream);
336 curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
337 curl_easy_setopt(curl, CURLOPT_FILE, NULL);
338 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
339 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
341 url = xmalloc(strlen(repo->base) + 50);
342 strcpy(url, repo->base);
343 posn = url + strlen(repo->base);
344 strcpy(posn, "objects/");
346 memcpy(posn, hex, 2);
349 strcpy(posn, hex + 2);
351 curl_easy_setopt(curl, CURLOPT_URL, url);
353 if (curl_easy_perform(curl)) {
360 SHA1_Final(real_sha1, &c);
361 if (zret != Z_STREAM_END) {
363 return error("File %s (%s) corrupt\n", hex, url);
365 if (memcmp(sha1, real_sha1, 20)) {
367 return error("File %s has bad hash\n", hex);
370 pull_say("got %s\n", hex);
374 int fetch(unsigned char *sha1)
376 struct alt_base *altbase = alt;
378 if (!fetch_object(altbase, sha1))
380 if (!fetch_pack(altbase, sha1))
382 if (fetch_alternates(altbase->base) > 0) {
386 altbase = altbase->next;
388 return error("Unable to find %s under %s\n", sha1_to_hex(sha1),
392 int fetch_ref(char *ref, unsigned char *sha1)
396 struct buffer buffer;
397 char *base = initial_base;
403 curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
404 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
405 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
407 url = xmalloc(strlen(base) + 6 + strlen(ref));
409 posn = url + strlen(base);
410 strcpy(posn, "refs/");
414 curl_easy_setopt(curl, CURLOPT_URL, url);
416 if (curl_easy_perform(curl))
417 return error("Couldn't get %s for %s\n", url, ref);
420 get_sha1_hex(hex, sha1);
424 int main(int argc, char **argv)
430 while (arg < argc && argv[arg][0] == '-') {
431 if (argv[arg][1] == 't') {
433 } else if (argv[arg][1] == 'c') {
435 } else if (argv[arg][1] == 'a') {
439 } else if (argv[arg][1] == 'v') {
441 } else if (argv[arg][1] == 'w') {
442 write_ref = argv[arg + 1];
447 if (argc < arg + 2) {
448 usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
451 commit_id = argv[arg];
454 curl_global_init(CURL_GLOBAL_ALL);
456 curl = curl_easy_init();
457 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
459 curl_ssl_verify = getenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
460 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
461 #if LIBCURL_VERSION_NUM >= 0x070907
462 curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
465 alt = xmalloc(sizeof(*alt));
467 alt->got_indices = 0;
475 curl_slist_free_all(no_pragma_header);
476 curl_global_cleanup();