[PATCH] support older versions of libcurl
[git/git.git] / http-pull.c
1 #include "cache.h"
2 #include "commit.h"
3
4 #include "pull.h"
5
6 #include <curl/curl.h>
7 #include <curl/easy.h>
8
9 #if LIBCURL_VERSION_NUM < 0x070704
10 #define curl_global_cleanup() do { /* nothing */ } while(0)
11 #endif
12 #if LIBCURL_VERSION_NUM < 0x070800
13 #define curl_global_init(a) do { /* nothing */ } while(0)
14 #endif
15 #if LIBCURL_VERSION_NUM < 0x070907
16 #define curl_easy_setopt(a, b, c) do { /* nothing */ } while(0)
17 #endif
18
19 static CURL *curl;
20
21 static char *base;
22
23 static SHA_CTX c;
24 static z_stream stream;
25
26 static int local;
27 static int zret;
28
29 static int curl_ssl_verify;
30
31 struct buffer
32 {
33 size_t posn;
34 size_t size;
35 void *buffer;
36 };
37
38 static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
39 struct buffer *buffer) {
40 size_t size = eltsize * nmemb;
41 if (size > buffer->size - buffer->posn)
42 size = buffer->size - buffer->posn;
43 memcpy(buffer->buffer + buffer->posn, ptr, size);
44 buffer->posn += size;
45 return size;
46 }
47
48 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
49 void *data) {
50 unsigned char expn[4096];
51 size_t size = eltsize * nmemb;
52 int posn = 0;
53 do {
54 ssize_t retval = write(local, ptr + posn, size - posn);
55 if (retval < 0)
56 return posn;
57 posn += retval;
58 } while (posn < size);
59
60 stream.avail_in = size;
61 stream.next_in = ptr;
62 do {
63 stream.next_out = expn;
64 stream.avail_out = sizeof(expn);
65 zret = inflate(&stream, Z_SYNC_FLUSH);
66 SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
67 } while (stream.avail_in && zret == Z_OK);
68 return size;
69 }
70
71 int fetch(unsigned char *sha1)
72 {
73 char *hex = sha1_to_hex(sha1);
74 char *filename = sha1_file_name(sha1);
75 unsigned char real_sha1[20];
76 char *url;
77 char *posn;
78
79 local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
80
81 if (local < 0)
82 return error("Couldn't open %s\n", filename);
83
84 memset(&stream, 0, sizeof(stream));
85
86 inflateInit(&stream);
87
88 SHA1_Init(&c);
89
90 curl_easy_setopt(curl, CURLOPT_FILE, NULL);
91 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
92
93 url = xmalloc(strlen(base) + 50);
94 strcpy(url, base);
95 posn = url + strlen(base);
96 strcpy(posn, "objects/");
97 posn += 8;
98 memcpy(posn, hex, 2);
99 posn += 2;
100 *(posn++) = '/';
101 strcpy(posn, hex + 2);
102
103 curl_easy_setopt(curl, CURLOPT_URL, url);
104
105 if (curl_easy_perform(curl))
106 return error("Couldn't get %s for %s\n", url, hex);
107
108 close(local);
109 inflateEnd(&stream);
110 SHA1_Final(real_sha1, &c);
111 if (zret != Z_STREAM_END) {
112 unlink(filename);
113 return error("File %s (%s) corrupt\n", hex, url);
114 }
115 if (memcmp(sha1, real_sha1, 20)) {
116 unlink(filename);
117 return error("File %s has bad hash\n", hex);
118 }
119
120 pull_say("got %s\n", hex);
121 return 0;
122 }
123
124 int fetch_ref(char *ref, unsigned char *sha1)
125 {
126 char *url, *posn;
127 char hex[42];
128 struct buffer buffer;
129 buffer.size = 41;
130 buffer.posn = 0;
131 buffer.buffer = hex;
132 hex[41] = '\0';
133
134 curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
135 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
136
137 url = xmalloc(strlen(base) + 6 + strlen(ref));
138 strcpy(url, base);
139 posn = url + strlen(base);
140 strcpy(posn, "refs/");
141 posn += 5;
142 strcpy(posn, ref);
143
144 curl_easy_setopt(curl, CURLOPT_URL, url);
145
146 if (curl_easy_perform(curl))
147 return error("Couldn't get %s for %s\n", url, ref);
148
149 hex[40] = '\0';
150 get_sha1_hex(hex, sha1);
151 return 0;
152 }
153
154 int main(int argc, char **argv)
155 {
156 char *commit_id;
157 char *url;
158 int arg = 1;
159
160 while (arg < argc && argv[arg][0] == '-') {
161 if (argv[arg][1] == 't') {
162 get_tree = 1;
163 } else if (argv[arg][1] == 'c') {
164 get_history = 1;
165 } else if (argv[arg][1] == 'a') {
166 get_all = 1;
167 get_tree = 1;
168 get_history = 1;
169 } else if (argv[arg][1] == 'v') {
170 get_verbosely = 1;
171 } else if (argv[arg][1] == 'w') {
172 write_ref = argv[arg + 1];
173 arg++;
174 }
175 arg++;
176 }
177 if (argc < arg + 2) {
178 usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
179 return 1;
180 }
181 commit_id = argv[arg];
182 url = argv[arg + 1];
183
184 curl_global_init(CURL_GLOBAL_ALL);
185
186 curl = curl_easy_init();
187
188 curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
189 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
190 curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
191
192 base = url;
193
194 if (pull(commit_id))
195 return 1;
196
197 curl_global_cleanup();
198 return 0;
199 }