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#ifndef HTTP_H
#define HTTP_H
 
#include "cache.h"
 
#include <curl/curl.h>
#include <curl/easy.h>
 
#if LIBCURL_VERSION_NUM >= 0x070908
#define USE_CURL_MULTI
#define DEFAULT_MAX_REQUESTS 5
#endif
 
#if LIBCURL_VERSION_NUM < 0x070704
#define curl_global_cleanup() do { /* nothing */ } while(0)
#endif
#if LIBCURL_VERSION_NUM < 0x070800
#define curl_global_init(a) do { /* nothing */ } while(0)
#endif
 
#if LIBCURL_VERSION_NUM < 0x070c04
#define NO_CURL_EASY_DUPHANDLE
#endif
 
struct slot_results
{
	CURLcode curl_result;
	long http_code;
};
 
struct active_request_slot
{
	CURL *curl;
	FILE *local;
	int in_use;
	CURLcode curl_result;
	long http_code;
	int *finished;
	struct slot_results *results;
	void *callback_data;
	void (*callback_func)(void *data);
	struct active_request_slot *next;
};
 
struct buffer
{
        size_t posn;
        size_t size;
        void *buffer;
};
 
/* Curl request read/write callbacks */
extern size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb,
			   struct buffer *buffer);
extern size_t fwrite_buffer(const void *ptr, size_t eltsize,
			    size_t nmemb, struct buffer *buffer);
extern size_t fwrite_null(const void *ptr, size_t eltsize,
			  size_t nmemb, struct buffer *buffer);
 
/* Slot lifecycle functions */
extern struct active_request_slot *get_active_slot(void);
extern int start_active_slot(struct active_request_slot *slot);
extern void run_active_slot(struct active_request_slot *slot);
extern void finish_all_active_slots(void);
extern void release_active_slot(struct active_request_slot *slot);
 
#ifdef USE_CURL_MULTI
extern void fill_active_slots(void);
extern void step_active_slots(void);
#endif
 
extern void http_init(void);
extern void http_cleanup(void);
 
extern int data_received;
extern int active_requests;
 
#ifdef USE_CURL_MULTI
extern int max_requests;
extern CURLM *curlm;
#endif
#ifndef NO_CURL_EASY_DUPHANDLE
extern CURL *curl_default;
#endif
extern char curl_errorstr[CURL_ERROR_SIZE];
 
extern int curl_ssl_verify;
extern char *ssl_cert;
#if LIBCURL_VERSION_NUM >= 0x070902
extern char *ssl_key;
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
extern char *ssl_capath;
#endif
extern char *ssl_cainfo;
extern long curl_low_speed_limit;
extern long curl_low_speed_time;
 
extern struct curl_slist *pragma_header;
extern struct curl_slist *no_range_header;
 
extern struct active_request_slot *active_queue_head;
 
#endif /* HTTP_H */