Andrew's git / gitweb.git / http.h
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http.hon commit t5800: testgit helper requires Python support (63a2f61)
   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
  12/*
  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.
  17 */
  18#undef USE_CURL_MULTI
  19
  20#if LIBCURL_VERSION_NUM >= 0x071000
  21#define USE_CURL_MULTI
  22#define DEFAULT_MAX_REQUESTS 5
  23#endif
  24
  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
  31
  32#if (LIBCURL_VERSION_NUM < 0x070c04) || (LIBCURL_VERSION_NUM == 0x071000)
  33#define NO_CURL_EASY_DUPHANDLE
  34#endif
  35
  36#if LIBCURL_VERSION_NUM < 0x070a03
  37#define CURLE_HTTP_RETURNED_ERROR CURLE_HTTP_NOT_FOUND
  38#endif
  39
  40#if LIBCURL_VERSION_NUM < 0x070c03
  41#define NO_CURL_IOCTL
  42#endif
  43
  44struct slot_results
  45{
  46        CURLcode curl_result;
  47        long http_code;
  48};
  49
  50struct active_request_slot
  51{
  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;
  62};
  63
  64struct buffer
  65{
  66        struct strbuf buf;
  67        size_t posn;
  68};
  69
  70/* Curl request read/write callbacks */
  71extern size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  72extern size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  73extern size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  74#ifndef NO_CURL_IOCTL
  75extern curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
  76#endif
  77
  78/* Slot lifecycle functions */
  79extern struct active_request_slot *get_active_slot(void);
  80extern int start_active_slot(struct active_request_slot *slot);
  81extern void run_active_slot(struct active_request_slot *slot);
  82extern void finish_active_slot(struct active_request_slot *slot);
  83extern void finish_all_active_slots(void);
  84
  85#ifdef USE_CURL_MULTI
  86extern void fill_active_slots(void);
  87extern void add_fill_function(void *data, int (*fill)(void *));
  88extern void step_active_slots(void);
  89#endif
  90
  91extern void http_init(struct remote *remote);
  92extern void http_cleanup(void);
  93
  94extern int data_received;
  95extern int active_requests;
  96extern int http_is_verbose;
  97extern size_t http_post_buffer;
  98
  99extern char curl_errorstr[CURL_ERROR_SIZE];
 100
 101static inline int missing__target(int code, int result)
 102{
 103        return  /* file:// URL -- do we ever use one??? */
 104                (result == CURLE_FILE_COULDNT_READ_FILE) ||
 105                /* http:// and https:// URL */
 106                (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
 107                /* ftp:// URL */
 108                (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
 109                ;
 110}
 111
 112#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
 113
 114/* Helpers for modifying and creating URLs */
 115extern void append_remote_object_url(struct strbuf *buf, const char *url,
 116                                     const char *hex,
 117                                     int only_two_digit_prefix);
 118extern char *get_remote_object_url(const char *url, const char *hex,
 119                                   int only_two_digit_prefix);
 120
 121/* Options for http_request_*() */
 122#define HTTP_NO_CACHE           1
 123
 124/* Return values for http_request_*() */
 125#define HTTP_OK                 0
 126#define HTTP_MISSING_TARGET     1
 127#define HTTP_ERROR              2
 128#define HTTP_START_FAILED       3
 129
 130/*
 131 * Requests an url and stores the result in a strbuf.
 132 *
 133 * If the result pointer is NULL, a HTTP HEAD request is made instead of GET.
 134 */
 135int http_get_strbuf(const char *url, struct strbuf *result, int options);
 136
 137/*
 138 * Prints an error message using error() containing url and curl_errorstr,
 139 * and returns ret.
 140 */
 141int http_error(const char *url, int ret);
 142
 143extern int http_fetch_ref(const char *base, struct ref *ref);
 144
 145/* Helpers for fetching packs */
 146extern int http_get_info_packs(const char *base_url,
 147        struct packed_git **packs_head);
 148
 149struct http_pack_request
 150{
 151        char *url;
 152        struct packed_git *target;
 153        struct packed_git **lst;
 154        FILE *packfile;
 155        char filename[PATH_MAX];
 156        char tmpfile[PATH_MAX];
 157        struct curl_slist *range_header;
 158        struct active_request_slot *slot;
 159};
 160
 161extern struct http_pack_request *new_http_pack_request(
 162        struct packed_git *target, const char *base_url);
 163extern int finish_http_pack_request(struct http_pack_request *preq);
 164extern void release_http_pack_request(struct http_pack_request *preq);
 165
 166/* Helpers for fetching object */
 167struct http_object_request
 168{
 169        char *url;
 170        char filename[PATH_MAX];
 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        z_stream 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 */