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git/http.h
Junio C Hamano 5ce6f51ff7 Merge branch 'jk/http-walker-limit-redirect' into maint 
Update the error messages from the dumb-http client when it fails
to obtain loose objects; we used to give sensible error message
only upon 404 but we now forbid unexpected redirects that needs to
be reported with something sensible.

* jk/http-walker-limit-redirect:
  http-walker: complain about non-404 loose object errors
  http: treat http-alternates like redirects
  http: make redirects more obvious
  remote-curl: rename shadowed options variable
  http: always update the base URL for redirects
  http: simplify update_url_from_redirect
2017-01-17 14:49:29 -08:00

238 lines
6.5 KiB
C
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#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"
/*
* We detect based on the cURL version if multi-transfer is
* usable in this implementation and define this symbol accordingly.
* This shouldn't be set by the Makefile or by the user (e.g. via CFLAGS).
*/
#undef USE_CURL_MULTI
#if LIBCURL_VERSION_NUM >= 0x071000
#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) || (LIBCURL_VERSION_NUM == 0x071000)
#define NO_CURL_EASY_DUPHANDLE
#endif
#if LIBCURL_VERSION_NUM < 0x070a03
#define CURLE_HTTP_RETURNED_ERROR CURLE_HTTP_NOT_FOUND
#endif
#if LIBCURL_VERSION_NUM < 0x070c03
#define NO_CURL_IOCTL
#endif
/*
* CURLOPT_USE_SSL was known as CURLOPT_FTP_SSL up to 7.16.4,
* and the constants were known as CURLFTPSSL_*
*/
#if !defined(CURLOPT_USE_SSL) && defined(CURLOPT_FTP_SSL)
#define CURLOPT_USE_SSL CURLOPT_FTP_SSL
#define CURLUSESSL_TRY CURLFTPSSL_TRY
#endif
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 */
extern size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
extern size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
extern size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
#ifndef NO_CURL_IOCTL
extern curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
#endif
/* 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);
/*
* 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);
#ifdef USE_CURL_MULTI
extern void fill_active_slots(void);
extern void add_fill_function(void *data, int (*fill)(void *));
extern void step_active_slots(void);
#endif
extern void http_init(struct remote *remote, const char *url,
int proactive_auth);
extern void http_cleanup(void);
extern struct curl_slist *http_copy_default_headers(void);
extern long int git_curl_ipresolve;
extern int active_requests;
extern int http_is_verbose;
extern size_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)
/* Helpers for modifying and creating URLs */
extern void append_remote_object_url(struct strbuf *buf, const char *url,
const char *hex,
int only_two_digit_prefix);
extern 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,
keep_error: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;
};
/* 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
/*
* 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);
extern int http_fetch_ref(const char *base, struct ref *ref);
/* Helpers for fetching packs */
extern int http_get_info_packs(const char *base_url,
struct packed_git **packs_head);
struct http_pack_request {
char *url;
struct packed_git *target;
struct packed_git **lst;
FILE *packfile;
char tmpfile[PATH_MAX];
struct active_request_slot *slot;
};
extern struct http_pack_request *new_http_pack_request(
struct packed_git *target, const char *base_url);
extern int finish_http_pack_request(struct http_pack_request *preq);
extern void release_http_pack_request(struct http_pack_request *preq);
/* Helpers for fetching object */
struct http_object_request {
char *url;
char tmpfile[PATH_MAX];
int localfile;
CURLcode curl_result;
char errorstr[CURL_ERROR_SIZE];
long http_code;
unsigned char sha1[20];
unsigned char real_sha1[20];
git_SHA_CTX c;
git_zstream stream;
int zret;
int rename;
struct active_request_slot *slot;
};
extern struct http_object_request *new_http_object_request(
const char *base_url, unsigned char *sha1);
extern void process_http_object_request(struct http_object_request *freq);
extern int finish_http_object_request(struct http_object_request *freq);
extern void abort_http_object_request(struct http_object_request *freq);
extern void release_http_object_request(struct http_object_request *freq);
/* setup routine for curl_easy_setopt CURLOPT_DEBUGFUNCTION */
void setup_curl_trace(CURL *handle);
#endif /* HTTP_H */
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