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git/http.h

246 lines
7.0 KiB

#ifndef HTTP_H
#define HTTP_H
#include "cache.h"
#include <curl/curl.h>
#include <curl/easy.h>
#include "strbuf.h"
#include "remote.h"
#include "url.h"
#define DEFAULT_MAX_REQUESTS 5
struct slot_results {
CURLcode curl_result;
long http_code;
long auth_avail;
long http_connectcode;
};
struct active_request_slot {
CURL *curl;
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 {
struct strbuf buf;
size_t posn;
};
/* Curl request read/write callbacks */
size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
/* Slot lifecycle functions */
struct active_request_slot *get_active_slot(void);
int start_active_slot(struct active_request_slot *slot);
void run_active_slot(struct active_request_slot *slot);
void finish_all_active_slots(void);
/*
* This will run one slot to completion in a blocking manner, similar to how
* curl_easy_perform would work (but we don't want to use that, because
* we do not want to intermingle calls to curl_multi and curl_easy).
*
*/
int run_one_slot(struct active_request_slot *slot,
struct slot_results *results);
void fill_active_slots(void);
void add_fill_function(void *data, int (*fill)(void *));
void step_active_slots(void);
void http_init(struct remote *remote, const char *url,
int proactive_auth);
void http_cleanup(void);
struct curl_slist *http_copy_default_headers(void);
extern long int git_curl_ipresolve;
extern int active_requests;
extern int http_is_verbose;
extern ssize_t http_post_buffer;
extern struct credential http_auth;
extern char curl_errorstr[CURL_ERROR_SIZE];
enum http_follow_config {
HTTP_FOLLOW_NONE,
HTTP_FOLLOW_ALWAYS,
HTTP_FOLLOW_INITIAL
};
extern enum http_follow_config http_follow_config;
static inline int missing__target(int code, int result)
{
return /* file:// URL -- do we ever use one??? */
(result == CURLE_FILE_COULDNT_READ_FILE) ||
/* http:// and https:// URL */
(code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
/* ftp:// URL */
(code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
;
}
#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
/*
* Normalize curl results to handle CURL_FAILONERROR (or lack thereof). Failing
* http codes have their "result" converted to CURLE_HTTP_RETURNED_ERROR, and
* an appropriate string placed in the errorstr buffer (pass curl_errorstr if
* you don't have a custom buffer).
*/
void normalize_curl_result(CURLcode *result, long http_code, char *errorstr,
size_t errorlen);
/* Helpers for modifying and creating URLs */
void append_remote_object_url(struct strbuf *buf, const char *url,
const char *hex,
int only_two_digit_prefix);
char *get_remote_object_url(const char *url, const char *hex,
int only_two_digit_prefix);
/* Options for http_get_*() */
struct http_get_options {
unsigned no_cache:1,
initial_request:1;
/* If non-NULL, returns the content-type of the response. */
struct strbuf *content_type;
/*
* If non-NULL, and content_type above is non-NULL, returns
* the charset parameter from the content-type. If none is
* present, returns an empty string.
*/
struct strbuf *charset;
/*
* If non-NULL, returns the URL we ended up at, including any
* redirects we followed.
*/
struct strbuf *effective_url;
/*
* If both base_url and effective_url are non-NULL, the base URL will
* be munged to reflect any redirections going from the requested url
* to effective_url. See the definition of update_url_from_redirect
* for details.
*/
struct strbuf *base_url;
/*
* If not NULL, contains additional HTTP headers to be sent with the
* request. The strings in the list must not be freed until after the
* request has completed.
*/
struct string_list *extra_headers;
};
/* Return values for http_get_*() */
#define HTTP_OK 0
#define HTTP_MISSING_TARGET 1
#define HTTP_ERROR 2
#define HTTP_START_FAILED 3
#define HTTP_REAUTH 4
#define HTTP_NOAUTH 5
#define HTTP_NOMATCHPUBLICKEY 6
/*
* Requests a URL and stores the result in a strbuf.
*
* If the result pointer is NULL, a HTTP HEAD request is made instead of GET.
*/
int http_get_strbuf(const char *url, struct strbuf *result, struct http_get_options *options);
/*
* Downloads a URL and stores the result in the given file.
*
* If a previous interrupted download is detected (i.e. a previous temporary
* file is still around) the download is resumed.
*/
int http_get_file(const char *url, const char *filename,
struct http_get_options *options);
int http_fetch_ref(const char *base, struct ref *ref);
/* Helpers for fetching packs */
int http_get_info_packs(const char *base_url,
struct packed_git **packs_head);
struct http_pack_request {
char *url;
/*
* index-pack command to run. Must be terminated by NULL.
*
* If NULL, defaults to {"index-pack", "--stdin", NULL}.
*/
const char **index_pack_args;
unsigned preserve_index_pack_stdout : 1;
FILE *packfile;
struct strbuf tmpfile;
struct active_request_slot *slot;
};
struct http_pack_request *new_http_pack_request(
const unsigned char *packed_git_hash, const char *base_url);
struct http_pack_request *new_direct_http_pack_request(
const unsigned char *packed_git_hash, char *url);
int finish_http_pack_request(struct http_pack_request *preq);
void release_http_pack_request(struct http_pack_request *preq);
/*
* Remove p from the given list, and invoke install_packed_git() on it.
*
* This is a convenience function for users that have obtained a list of packs
* from http_get_info_packs() and have chosen a specific pack to fetch.
*/
void http_install_packfile(struct packed_git *p,
struct packed_git **list_to_remove_from);
/* Helpers for fetching object */
struct http_object_request {
char *url;
struct strbuf tmpfile;
int localfile;
CURLcode curl_result;
char errorstr[CURL_ERROR_SIZE];
long http_code;
struct object_id oid;
struct object_id real_oid;
git_hash_ctx c;
git_zstream stream;
int zret;
int rename;
struct active_request_slot *slot;
};
struct http_object_request *new_http_object_request(
const char *base_url, const struct object_id *oid);
void process_http_object_request(struct http_object_request *freq);
int finish_http_object_request(struct http_object_request *freq);
void abort_http_object_request(struct http_object_request *freq);
void release_http_object_request(struct http_object_request *freq);
/*
* Instead of using environment variables to determine if curl tracing happens,
* behave as if GIT_TRACE_CURL=1 and GIT_TRACE_CURL_NO_DATA=1 is set. Call this
* before calling setup_curl_trace().
*/
void http_trace_curl_no_data(void);
/* setup routine for curl_easy_setopt CURLOPT_DEBUGFUNCTION */
void setup_curl_trace(CURL *handle);
#endif /* HTTP_H */