Andrew's git / gitweb.git / http.h
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http.hon commit mergetools/meld: Use --help output to detect --output support (759a904)
   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
  45struct slot_results {
  46        CURLcode curl_result;
  47        long http_code;
  48};
  49
  50struct active_request_slot {
  51        CURL *curl;
  52        FILE *local;
  53        int in_use;
  54        CURLcode curl_result;
  55        long http_code;
  56        int *finished;
  57        struct slot_results *results;
  58        void *callback_data;
  59        void (*callback_func)(void *data);
  60        struct active_request_slot *next;
  61};
  62
  63struct buffer {
  64        struct strbuf buf;
  65        size_t posn;
  66};
  67
  68/* Curl request read/write callbacks */
  69extern size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  70extern size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  71extern size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  72#ifndef NO_CURL_IOCTL
  73extern curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
  74#endif
  75
  76/* Slot lifecycle functions */
  77extern struct active_request_slot *get_active_slot(void);
  78extern int start_active_slot(struct active_request_slot *slot);
  79extern void run_active_slot(struct active_request_slot *slot);
  80extern void finish_active_slot(struct active_request_slot *slot);
  81extern void finish_all_active_slots(void);
  82
  83#ifdef USE_CURL_MULTI
  84extern void fill_active_slots(void);
  85extern void add_fill_function(void *data, int (*fill)(void *));
  86extern void step_active_slots(void);
  87#endif
  88
  89extern void http_init(struct remote *remote);
  90extern void http_cleanup(void);
  91
  92extern int data_received;
  93extern int active_requests;
  94extern int http_is_verbose;
  95extern size_t http_post_buffer;
  96
  97extern char curl_errorstr[CURL_ERROR_SIZE];
  98
  99static inline int missing__target(int code, int result)
 100{
 101        return  /* file:// URL -- do we ever use one??? */
 102                (result == CURLE_FILE_COULDNT_READ_FILE) ||
 103                /* http:// and https:// URL */
 104                (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
 105                /* ftp:// URL */
 106                (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
 107                ;
 108}
 109
 110#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
 111
 112/* Helpers for modifying and creating URLs */
 113extern void append_remote_object_url(struct strbuf *buf, const char *url,
 114                                     const char *hex,
 115                                     int only_two_digit_prefix);
 116extern char *get_remote_object_url(const char *url, const char *hex,
 117                                   int only_two_digit_prefix);
 118
 119/* Options for http_request_*() */
 120#define HTTP_NO_CACHE           1
 121
 122/* Return values for http_request_*() */
 123#define HTTP_OK                 0
 124#define HTTP_MISSING_TARGET     1
 125#define HTTP_ERROR              2
 126#define HTTP_START_FAILED       3
 127#define HTTP_REAUTH     4
 128#define HTTP_NOAUTH     5
 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        char *url;
 151        struct packed_git *target;
 152        struct packed_git **lst;
 153        FILE *packfile;
 154        char tmpfile[PATH_MAX];
 155        struct curl_slist *range_header;
 156        struct active_request_slot *slot;
 157};
 158
 159extern struct http_pack_request *new_http_pack_request(
 160        struct packed_git *target, const char *base_url);
 161extern int finish_http_pack_request(struct http_pack_request *preq);
 162extern void release_http_pack_request(struct http_pack_request *preq);
 163
 164/* Helpers for fetching object */
 165struct http_object_request {
 166        char *url;
 167        char tmpfile[PATH_MAX];
 168        int localfile;
 169        CURLcode curl_result;
 170        char errorstr[CURL_ERROR_SIZE];
 171        long http_code;
 172        unsigned char sha1[20];
 173        unsigned char real_sha1[20];
 174        git_SHA_CTX c;
 175        git_zstream stream;
 176        int zret;
 177        int rename;
 178        struct active_request_slot *slot;
 179};
 180
 181extern struct http_object_request *new_http_object_request(
 182        const char *base_url, unsigned char *sha1);
 183extern void process_http_object_request(struct http_object_request *freq);
 184extern int finish_http_object_request(struct http_object_request *freq);
 185extern void abort_http_object_request(struct http_object_request *freq);
 186extern void release_http_object_request(struct http_object_request *freq);
 187
 188#endif /* HTTP_H */