[PATCH] Support more http features: https no cert, .netrc -> auth
[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 static CURL *curl;
10
11 static char *base;
12
13 static SHA_CTX c;
14 static z_stream stream;
15
16 static int local;
17 static int zret;
18
19 static int curl_ssl_verify;
20
21 struct buffer
22 {
23         size_t posn;
24         size_t size;
25         void *buffer;
26 };
27
28 static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
29                             struct buffer *buffer) {
30         size_t size = eltsize * nmemb;
31         if (size > buffer->size - buffer->posn)
32                 size = buffer->size - buffer->posn;
33         memcpy(buffer->buffer + buffer->posn, ptr, size);
34         buffer->posn += size;
35         return size;
36 }
37
38 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, 
39                                void *data) {
40         unsigned char expn[4096];
41         size_t size = eltsize * nmemb;
42         int posn = 0;
43         do {
44                 ssize_t retval = write(local, ptr + posn, size - posn);
45                 if (retval < 0)
46                         return posn;
47                 posn += retval;
48         } while (posn < size);
49
50         stream.avail_in = size;
51         stream.next_in = ptr;
52         do {
53                 stream.next_out = expn;
54                 stream.avail_out = sizeof(expn);
55                 zret = inflate(&stream, Z_SYNC_FLUSH);
56                 SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
57         } while (stream.avail_in && zret == Z_OK);
58         return size;
59 }
60
61 int fetch(unsigned char *sha1)
62 {
63         char *hex = sha1_to_hex(sha1);
64         char *filename = sha1_file_name(sha1);
65         unsigned char real_sha1[20];
66         char *url;
67         char *posn;
68
69         local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
70
71         if (local < 0)
72                 return error("Couldn't open %s\n", filename);
73
74         memset(&stream, 0, sizeof(stream));
75
76         inflateInit(&stream);
77
78         SHA1_Init(&c);
79
80         curl_easy_setopt(curl, CURLOPT_FILE, NULL);
81         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
82
83         url = xmalloc(strlen(base) + 50);
84         strcpy(url, base);
85         posn = url + strlen(base);
86         strcpy(posn, "objects/");
87         posn += 8;
88         memcpy(posn, hex, 2);
89         posn += 2;
90         *(posn++) = '/';
91         strcpy(posn, hex + 2);
92
93         curl_easy_setopt(curl, CURLOPT_URL, url);
94
95         if (curl_easy_perform(curl))
96                 return error("Couldn't get %s for %s\n", url, hex);
97
98         close(local);
99         inflateEnd(&stream);
100         SHA1_Final(real_sha1, &c);
101         if (zret != Z_STREAM_END) {
102                 unlink(filename);
103                 return error("File %s (%s) corrupt\n", hex, url);
104         }
105         if (memcmp(sha1, real_sha1, 20)) {
106                 unlink(filename);
107                 return error("File %s has bad hash\n", hex);
108         }
109         
110         pull_say("got %s\n", hex);
111         return 0;
112 }
113
114 int fetch_ref(char *ref, unsigned char *sha1)
115 {
116         char *url, *posn;
117         char hex[42];
118         struct buffer buffer;
119         buffer.size = 41;
120         buffer.posn = 0;
121         buffer.buffer = hex;
122         hex[41] = '\0';
123         
124         curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
125         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
126
127         url = xmalloc(strlen(base) + 6 + strlen(ref));
128         strcpy(url, base);
129         posn = url + strlen(base);
130         strcpy(posn, "refs/");
131         posn += 5;
132         strcpy(posn, ref);
133
134         curl_easy_setopt(curl, CURLOPT_URL, url);
135
136         if (curl_easy_perform(curl))
137                 return error("Couldn't get %s for %s\n", url, ref);
138
139         hex[40] = '\0';
140         get_sha1_hex(hex, sha1);
141         return 0;
142 }
143
144 int main(int argc, char **argv)
145 {
146         char *commit_id;
147         char *url;
148         int arg = 1;
149
150         while (arg < argc && argv[arg][0] == '-') {
151                 if (argv[arg][1] == 't') {
152                         get_tree = 1;
153                 } else if (argv[arg][1] == 'c') {
154                         get_history = 1;
155                 } else if (argv[arg][1] == 'a') {
156                         get_all = 1;
157                         get_tree = 1;
158                         get_history = 1;
159                 } else if (argv[arg][1] == 'v') {
160                         get_verbosely = 1;
161                 } else if (argv[arg][1] == 'w') {
162                         write_ref = argv[arg + 1];
163                         arg++;
164                 }
165                 arg++;
166         }
167         if (argc < arg + 2) {
168                 usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
169                 return 1;
170         }
171         commit_id = argv[arg];
172         url = argv[arg + 1];
173
174         curl_global_init(CURL_GLOBAL_ALL);
175
176         curl = curl_easy_init();
177
178         curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
179         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
180         curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
181
182         base = url;
183
184         if (pull(commit_id))
185                 return 1;
186
187         curl_global_cleanup();
188         return 0;
189 }