Andrew's git / gitweb.git / http.h
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http.hon commit unpack-trees: handle lstat failure for existing directory (92fda79)
   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{
  47        CURLcode curl_result;
  48        long http_code;
  49};
  50
  51struct active_request_slot
  52{
  53        CURL *curl;
  54        FILE *local;
  55        int in_use;
  56        CURLcode curl_result;
  57        long http_code;
  58        int *finished;
  59        struct slot_results *results;
  60        void *callback_data;
  61        void (*callback_func)(void *data);
  62        struct active_request_slot *next;
  63};
  64
  65struct buffer
  66{
  67        struct strbuf buf;
  68        size_t posn;
  69};
  70
  71/* Curl request read/write callbacks */
  72extern size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  73extern size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  74extern size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
  75#ifndef NO_CURL_IOCTL
  76extern curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
  77#endif
  78
  79/* Slot lifecycle functions */
  80extern struct active_request_slot *get_active_slot(void);
  81extern int start_active_slot(struct active_request_slot *slot);
  82extern void run_active_slot(struct active_request_slot *slot);
  83extern void finish_active_slot(struct active_request_slot *slot);
  84extern void finish_all_active_slots(void);
  85
  86#ifdef USE_CURL_MULTI
  87extern void fill_active_slots(void);
  88extern void add_fill_function(void *data, int (*fill)(void *));
  89extern void step_active_slots(void);
  90#endif
  91
  92extern void http_init(struct remote *remote);
  93extern void http_cleanup(void);
  94
  95extern int data_received;
  96extern int active_requests;
  97extern int http_is_verbose;
  98extern size_t http_post_buffer;
  99
 100extern char curl_errorstr[CURL_ERROR_SIZE];
 101
 102static inline int missing__target(int code, int result)
 103{
 104        return  /* file:// URL -- do we ever use one??? */
 105                (result == CURLE_FILE_COULDNT_READ_FILE) ||
 106                /* http:// and https:// URL */
 107                (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
 108                /* ftp:// URL */
 109                (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
 110                ;
 111}
 112
 113#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
 114
 115/* Helpers for modifying and creating URLs */
 116extern void append_remote_object_url(struct strbuf *buf, const char *url,
 117                                     const char *hex,
 118                                     int only_two_digit_prefix);
 119extern char *get_remote_object_url(const char *url, const char *hex,
 120                                   int only_two_digit_prefix);
 121
 122/* Options for http_request_*() */
 123#define HTTP_NO_CACHE           1
 124
 125/* Return values for http_request_*() */
 126#define HTTP_OK                 0
 127#define HTTP_MISSING_TARGET     1
 128#define HTTP_ERROR              2
 129#define HTTP_START_FAILED       3
 130#define HTTP_REAUTH     4
 131#define HTTP_NOAUTH     5
 132
 133/*
 134 * Requests an url and stores the result in a strbuf.
 135 *
 136 * If the result pointer is NULL, a HTTP HEAD request is made instead of GET.
 137 */
 138int http_get_strbuf(const char *url, struct strbuf *result, int options);
 139
 140/*
 141 * Prints an error message using error() containing url and curl_errorstr,
 142 * and returns ret.
 143 */
 144int http_error(const char *url, int ret);
 145
 146extern int http_fetch_ref(const char *base, struct ref *ref);
 147
 148/* Helpers for fetching packs */
 149extern int http_get_info_packs(const char *base_url,
 150        struct packed_git **packs_head);
 151
 152struct http_pack_request
 153{
 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{
 171        char *url;
 172        char tmpfile[PATH_MAX];
 173        int localfile;
 174        CURLcode curl_result;
 175        char errorstr[CURL_ERROR_SIZE];
 176        long http_code;
 177        unsigned char sha1[20];
 178        unsigned char real_sha1[20];
 179        git_SHA_CTX c;
 180        z_stream stream;
 181        int zret;
 182        int rename;
 183        struct active_request_slot *slot;
 184};
 185
 186extern struct http_object_request *new_http_object_request(
 187        const char *base_url, unsigned char *sha1);
 188extern void process_http_object_request(struct http_object_request *freq);
 189extern int finish_http_object_request(struct http_object_request *freq);
 190extern void abort_http_object_request(struct http_object_request *freq);
 191extern void release_http_object_request(struct http_object_request *freq);
 192
 193#endif /* HTTP_H */