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[git.git] / http.h
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1 #ifndef HTTP_H
2 #define HTTP_H
4 #include "cache.h"
6 #include <curl/curl.h>
7 #include <curl/easy.h>
9 #include "strbuf.h"
10 #include "remote.h"
13 * We detect based on the cURL version if multi-transfer is
14 * usable in this implementation and define this symbol accordingly.
15 * This is not something Makefile should set nor users should pass
16 * via CFLAGS.
18 #undef USE_CURL_MULTI
20 #if LIBCURL_VERSION_NUM >= 0x071000
21 #define USE_CURL_MULTI
22 #define DEFAULT_MAX_REQUESTS 5
23 #endif
25 #if LIBCURL_VERSION_NUM < 0x070704
26 #define curl_global_cleanup() do { /* nothing */ } while(0)
27 #endif
28 #if LIBCURL_VERSION_NUM < 0x070800
29 #define curl_global_init(a) do { /* nothing */ } while(0)
30 #endif
32 #if (LIBCURL_VERSION_NUM < 0x070c04) || (LIBCURL_VERSION_NUM == 0x071000)
33 #define NO_CURL_EASY_DUPHANDLE
34 #endif
36 #if LIBCURL_VERSION_NUM < 0x070a03
37 #define CURLE_HTTP_RETURNED_ERROR CURLE_HTTP_NOT_FOUND
38 #endif
40 #if LIBCURL_VERSION_NUM < 0x070c03
41 #define NO_CURL_IOCTL
42 #endif
44 struct slot_results
46 CURLcode curl_result;
47 long http_code;
50 struct active_request_slot
52 CURL *curl;
53 FILE *local;
54 int in_use;
55 CURLcode curl_result;
56 long http_code;
57 int *finished;
58 struct slot_results *results;
59 void *callback_data;
60 void (*callback_func)(void *data);
61 struct active_request_slot *next;
64 struct buffer
66 struct strbuf buf;
67 size_t posn;
70 /* Curl request read/write callbacks */
71 extern size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
72 extern size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
73 extern size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
74 #ifndef NO_CURL_IOCTL
75 extern curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
76 #endif
78 /* Slot lifecycle functions */
79 extern struct active_request_slot *get_active_slot(void);
80 extern int start_active_slot(struct active_request_slot *slot);
81 extern void run_active_slot(struct active_request_slot *slot);
82 extern void finish_all_active_slots(void);
83 extern void release_active_slot(struct active_request_slot *slot);
85 #ifdef USE_CURL_MULTI
86 extern void fill_active_slots(void);
87 extern void add_fill_function(void *data, int (*fill)(void *));
88 extern void step_active_slots(void);
89 #endif
91 extern void http_init(struct remote *remote);
92 extern void http_cleanup(void);
94 extern int data_received;
95 extern int active_requests;
96 extern int http_is_verbose;
98 extern char curl_errorstr[CURL_ERROR_SIZE];
100 static inline int missing__target(int code, int result)
102 return /* file:// URL -- do we ever use one??? */
103 (result == CURLE_FILE_COULDNT_READ_FILE) ||
104 /* http:// and https:// URL */
105 (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
106 /* ftp:// URL */
107 (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
111 #define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
113 /* Helpers for modifying and creating URLs */
114 extern void append_remote_object_url(struct strbuf *buf, const char *url,
115 const char *hex,
116 int only_two_digit_prefix);
117 extern char *get_remote_object_url(const char *url, const char *hex,
118 int only_two_digit_prefix);
120 /* Options for http_request_*() */
121 #define HTTP_NO_CACHE 1
123 /* Return values for http_request_*() */
124 #define HTTP_OK 0
125 #define HTTP_MISSING_TARGET 1
126 #define HTTP_ERROR 2
127 #define HTTP_START_FAILED 3
130 * Requests an url and stores the result in a strbuf.
132 * If the result pointer is NULL, a HTTP HEAD request is made instead of GET.
134 int http_get_strbuf(const char *url, struct strbuf *result, int options);
137 * Downloads an url and stores the result in the given file.
139 * If a previous interrupted download is detected (i.e. a previous temporary
140 * file is still around) the download is resumed.
142 int http_get_file(const char *url, const char *filename, int options);
145 * Prints an error message using error() containing url and curl_errorstr,
146 * and returns ret.
148 int http_error(const char *url, int ret);
150 extern int http_fetch_ref(const char *base, struct ref *ref);
152 /* Helpers for fetching packs */
153 extern int http_get_info_packs(const char *base_url,
154 struct packed_git **packs_head);
156 struct http_pack_request
158 char *url;
159 struct packed_git *target;
160 struct packed_git **lst;
161 FILE *packfile;
162 char filename[PATH_MAX];
163 char tmpfile[PATH_MAX];
164 struct curl_slist *range_header;
165 struct active_request_slot *slot;
168 extern struct http_pack_request *new_http_pack_request(
169 struct packed_git *target, const char *base_url);
170 extern int finish_http_pack_request(struct http_pack_request *preq);
171 extern void release_http_pack_request(struct http_pack_request *preq);
173 /* Helpers for fetching object */
174 struct http_object_request
176 char *url;
177 char filename[PATH_MAX];
178 char tmpfile[PATH_MAX];
179 int localfile;
180 CURLcode curl_result;
181 char errorstr[CURL_ERROR_SIZE];
182 long http_code;
183 unsigned char sha1[20];
184 unsigned char real_sha1[20];
185 git_SHA_CTX c;
186 z_stream stream;
187 int zret;
188 int rename;
189 struct active_request_slot *slot;
192 extern struct http_object_request *new_http_object_request(
193 const char *base_url, unsigned char *sha1);
194 extern void process_http_object_request(struct http_object_request *freq);
195 extern int finish_http_object_request(struct http_object_request *freq);
196 extern void abort_http_object_request(struct http_object_request *freq);
197 extern void release_http_object_request(struct http_object_request *freq);
199 #endif /* HTTP_H */