Andrew's git / gitweb.git / http.h
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http.hon commit t6111: new TREESAME test set (abdea96)
   1#ifndef HTTP_H
   2#define HTTP_H
   3
   4#include "cache.h"
   5
   6#include <curl/curl.h>
   7#include <curl/easy.h>
   8
   9#include "strbuf.h"
  10#include "remote.h"
  11#include "url.h"
  12
  13/*
  14 * We detect based on the cURL version if multi-transfer is
  15 * usable in this implementation and define this symbol accordingly.
  16 * This is not something Makefile should set nor users should pass
  17 * via CFLAGS.
  18 */
  19#undef USE_CURL_MULTI
  20
  21#if LIBCURL_VERSION_NUM >= 0x071000
  22#define USE_CURL_MULTI
  23#define DEFAULT_MAX_REQUESTS 5
  24#endif
  25
  26#if LIBCURL_VERSION_NUM < 0x070704
  27#define curl_global_cleanup() do { /* nothing */ } while (0)
  28#endif
  29#if LIBCURL_VERSION_NUM < 0x070800
  30#define curl_global_init(a) do { /* nothing */ } while (0)
  31#endif
  32
  33#if (LIBCURL_VERSION_NUM < 0x070c04) || (LIBCURL_VERSION_NUM == 0x071000)
  34#define NO_CURL_EASY_DUPHANDLE
  35#endif
  36
  37#if LIBCURL_VERSION_NUM < 0x070a03
  38#define CURLE_HTTP_RETURNED_ERROR CURLE_HTTP_NOT_FOUND
  39#endif
  40
  41#if LIBCURL_VERSION_NUM < 0x070c03
  42#define NO_CURL_IOCTL
  43#endif
  44
  45/*
  46 * CURLOPT_USE_SSL was known as CURLOPT_FTP_SSL up to 7.16.4,
  47 * and the constants were known as CURLFTPSSL_*
  48*/
  49#if !defined(CURLOPT_USE_SSL) && defined(CURLOPT_FTP_SSL)
  50#define CURLOPT_USE_SSL CURLOPT_FTP_SSL
  51#define CURLUSESSL_TRY CURLFTPSSL_TRY
  52#endif
  53
  54struct slot_results {
  55        CURLcode curl_result;
  56        long http_code;
  57};
  58
  59struct active_request_slot {
  60        CURL *curl;
  61        int in_use;
  62        CURLcode curl_result;
  63        long http_code;
  64        int *finished;
  65        struct slot_results *results;
  66        void *callback_data;
  67        void (*callback_func)(void *data);
  68        struct active_request_slot *next;
  69};
  70
  71struct buffer {
  72        struct strbuf buf;
  73        size_t posn;
  74};
  75
  76/* Curl request read/write callbacks */
  77extern size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  78extern size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  79extern size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  80#ifndef NO_CURL_IOCTL
  81extern curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
  82#endif
  83
  84/* Slot lifecycle functions */
  85extern struct active_request_slot *get_active_slot(void);
  86extern int start_active_slot(struct active_request_slot *slot);
  87extern void run_active_slot(struct active_request_slot *slot);
  88extern void finish_active_slot(struct active_request_slot *slot);
  89extern void finish_all_active_slots(void);
  90extern int handle_curl_result(struct slot_results *results);
  91
  92#ifdef USE_CURL_MULTI
  93extern void fill_active_slots(void);
  94extern void add_fill_function(void *data, int (*fill)(void *));
  95extern void step_active_slots(void);
  96#endif
  97
  98extern void http_init(struct remote *remote, const char *url,
  99                      int proactive_auth);
 100extern void http_cleanup(void);
 101
 102extern int active_requests;
 103extern int http_is_verbose;
 104extern size_t http_post_buffer;
 105
 106extern char curl_errorstr[CURL_ERROR_SIZE];
 107
 108static inline int missing__target(int code, int result)
 109{
 110        return  /* file:// URL -- do we ever use one??? */
 111                (result == CURLE_FILE_COULDNT_READ_FILE) ||
 112                /* http:// and https:// URL */
 113                (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
 114                /* ftp:// URL */
 115                (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
 116                ;
 117}
 118
 119#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
 120
 121/* Helpers for modifying and creating URLs */
 122extern void append_remote_object_url(struct strbuf *buf, const char *url,
 123                                     const char *hex,
 124                                     int only_two_digit_prefix);
 125extern char *get_remote_object_url(const char *url, const char *hex,
 126                                   int only_two_digit_prefix);
 127
 128/* Options for http_request_*() */
 129#define HTTP_NO_CACHE           1
 130#define HTTP_KEEP_ERROR         2
 131
 132/* Return values for http_request_*() */
 133#define HTTP_OK                 0
 134#define HTTP_MISSING_TARGET     1
 135#define HTTP_ERROR              2
 136#define HTTP_START_FAILED       3
 137#define HTTP_REAUTH     4
 138#define HTTP_NOAUTH     5
 139
 140/*
 141 * Requests a URL and stores the result in a strbuf.
 142 *
 143 * If the result pointer is NULL, a HTTP HEAD request is made instead of GET.
 144 */
 145int http_get_strbuf(const char *url, struct strbuf *content_type, struct strbuf *result, int options);
 146
 147extern int http_fetch_ref(const char *base, struct ref *ref);
 148
 149/* Helpers for fetching packs */
 150extern int http_get_info_packs(const char *base_url,
 151        struct packed_git **packs_head);
 152
 153struct http_pack_request {
 154        char *url;
 155        struct packed_git *target;
 156        struct packed_git **lst;
 157        FILE *packfile;
 158        char tmpfile[PATH_MAX];
 159        struct curl_slist *range_header;
 160        struct active_request_slot *slot;
 161};
 162
 163extern struct http_pack_request *new_http_pack_request(
 164        struct packed_git *target, const char *base_url);
 165extern int finish_http_pack_request(struct http_pack_request *preq);
 166extern void release_http_pack_request(struct http_pack_request *preq);
 167
 168/* Helpers for fetching object */
 169struct http_object_request {
 170        char *url;
 171        char tmpfile[PATH_MAX];
 172        int localfile;
 173        CURLcode curl_result;
 174        char errorstr[CURL_ERROR_SIZE];
 175        long http_code;
 176        unsigned char sha1[20];
 177        unsigned char real_sha1[20];
 178        git_SHA_CTX c;
 179        git_zstream stream;
 180        int zret;
 181        int rename;
 182        struct active_request_slot *slot;
 183};
 184
 185extern struct http_object_request *new_http_object_request(
 186        const char *base_url, unsigned char *sha1);
 187extern void process_http_object_request(struct http_object_request *freq);
 188extern int finish_http_object_request(struct http_object_request *freq);
 189extern void abort_http_object_request(struct http_object_request *freq);
 190extern void release_http_object_request(struct http_object_request *freq);
 191
 192#endif /* HTTP_H */