http.h

   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
  11 #if LIBCURL_VERSION_NUM >= 0x071000
  12 #define USE_CURL_MULTI
  13 #define DEFAULT_MAX_REQUESTS 5
  14 #endif
  15
  16 #if LIBCURL_VERSION_NUM < 0x070704
  17 #define curl_global_cleanup() do { /* nothing */ } while(0)
  18 #endif
  19 #if LIBCURL_VERSION_NUM < 0x070800
  20 #define curl_global_init(a) do { /* nothing */ } while(0)
  21 #endif
  22
  23 #if (LIBCURL_VERSION_NUM < 0x070c04) || (LIBCURL_VERSION_NUM == 0x071000)
  24 #define NO_CURL_EASY_DUPHANDLE
  25 #endif
  26
  27 #if LIBCURL_VERSION_NUM < 0x070a03
  28 #define CURLE_HTTP_RETURNED_ERROR CURLE_HTTP_NOT_FOUND
  29 #endif
  30
  31 struct slot_results
  32 {
  33         CURLcode curl_result;
  34         long http_code;
  35 };
  36
  37 struct active_request_slot
  38 {
  39         CURL *curl;
  40         FILE *local;
  41         int in_use;
  42         CURLcode curl_result;
  43         long http_code;
  44         int *finished;
  45         struct slot_results *results;
  46         void *callback_data;
  47         void (*callback_func)(void *data);
  48         struct active_request_slot *next;
  49 };
  50
  51 struct buffer
  52 {
  53         struct strbuf buf;
  54         size_t posn;
  55 };
  56
  57 /* Curl request read/write callbacks */
  58 extern size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb,
  59                            struct buffer *buffer);
  60 extern size_t fwrite_buffer(const void *ptr, size_t eltsize,
  61                             size_t nmemb, struct strbuf *buffer);
  62 extern size_t fwrite_null(const void *ptr, size_t eltsize,
  63                           size_t nmemb, struct strbuf *buffer);
  64
  65 /* Slot lifecycle functions */
  66 extern struct active_request_slot *get_active_slot(void);
  67 extern int start_active_slot(struct active_request_slot *slot);
  68 extern void run_active_slot(struct active_request_slot *slot);
  69 extern void finish_all_active_slots(void);
  70 extern void release_active_slot(struct active_request_slot *slot);
  71
  72 #ifdef USE_CURL_MULTI
  73 extern void fill_active_slots(void);
  74 extern void add_fill_function(void *data, int (*fill)(void *));
  75 extern void step_active_slots(void);
  76 #endif
  77
  78 extern void http_init(void);
  79 extern void http_cleanup(void);
  80
  81 extern int data_received;
  82 extern int active_requests;
  83
  84 extern char curl_errorstr[CURL_ERROR_SIZE];
  85
  86 static inline int missing__target(int code, int result)
  87 {
  88         return  /* file:// URL -- do we ever use one??? */
  89                 (result == CURLE_FILE_COULDNT_READ_FILE) ||
  90                 /* http:// and https:// URL */
  91                 (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
  92                 /* ftp:// URL */
  93                 (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
  94                 ;
  95 }
  96
  97 #define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
  98
  99 extern int http_fetch_ref(const char *base, const char *ref, unsigned char *sha1);
 100
 101 #endif /* HTTP_H */