203 lines
4.9 KiB
C
203 lines
4.9 KiB
C
/*
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* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* Fetching of data from a URL (interface).
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*/
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#ifndef _NETSURF_DESKTOP_FETCH_H_
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#define _NETSURF_DESKTOP_FETCH_H_
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#include <stdbool.h>
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#include "utils/config.h"
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#include "utils/nsurl.h"
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struct content;
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struct fetch;
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struct ssl_cert_info;
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typedef enum {
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FETCH_PROGRESS,
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FETCH_HEADER,
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FETCH_DATA,
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FETCH_FINISHED,
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FETCH_ERROR,
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FETCH_REDIRECT,
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FETCH_NOTMODIFIED,
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FETCH_AUTH,
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FETCH_CERT_ERR,
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FETCH_SSL_ERR
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} fetch_msg_type;
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typedef struct fetch_msg {
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fetch_msg_type type;
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union {
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const char *progress;
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struct {
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const uint8_t *buf;
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size_t len;
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} header_or_data;
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const char *error;
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/** \todo Use nsurl */
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const char *redirect;
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struct {
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const char *realm;
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} auth;
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struct {
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const struct ssl_cert_info *certs;
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size_t num_certs;
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} cert_err;
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} data;
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} fetch_msg;
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/** Fetch POST multipart data */
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struct fetch_multipart_data {
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bool file; /**< Item is a file */
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char *name; /**< Name of item */
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char *value; /**< Item value */
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char *rawfile; /**< Raw filename if file is true */
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struct fetch_multipart_data *next; /**< Next in linked list */
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};
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struct ssl_cert_info {
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long version; /**< Certificate version */
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char not_before[32]; /**< Valid from date */
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char not_after[32]; /**< Valid to date */
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int sig_type; /**< Signature type */
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long serial; /**< Serial number */
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char issuer[256]; /**< Issuer details */
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char subject[256]; /**< Subject details */
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int cert_type; /**< Certificate type */
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};
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typedef void (*fetch_callback)(const fetch_msg *msg, void *p);
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/**
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* Start fetching data for the given URL.
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*
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* The function returns immediately. The fetch may be queued for later
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* processing.
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*
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* A pointer to an opaque struct fetch is returned, which can be passed to
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* fetch_abort() to abort the fetch at any time. Returns NULL if memory is
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* exhausted (or some other fatal error occurred).
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*
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* The caller must supply a callback function which is called when anything
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* interesting happens. The callback function is first called with msg
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* FETCH_HEADER, with the header in data, then one or more times
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* with FETCH_DATA with some data for the url, and finally with
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* FETCH_FINISHED. Alternatively, FETCH_ERROR indicates an error occurred:
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* data contains an error message. FETCH_REDIRECT may replace the FETCH_HEADER,
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* FETCH_DATA, FETCH_FINISHED sequence if the server sends a replacement URL.
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*
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*/
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struct fetch *fetch_start(nsurl *url, nsurl *referer,
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fetch_callback callback,
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void *p, bool only_2xx, const char *post_urlenc,
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const struct fetch_multipart_data *post_multipart,
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bool verifiable, bool downgrade_tls,
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const char *headers[]);
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/**
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* Abort a fetch.
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*/
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void fetch_abort(struct fetch *f);
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/**
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* Check if a URL's scheme can be fetched.
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*
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* \param url URL to check
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* \return true if the scheme is supported
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*/
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bool fetch_can_fetch(const nsurl *url);
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/**
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* Change the callback function for a fetch.
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*/
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void fetch_change_callback(struct fetch *fetch, fetch_callback callback, void *p);
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/**
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* Get the HTTP response code.
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*/
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long fetch_http_code(struct fetch *fetch);
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/**
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* Determine if a fetch was verifiable
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*
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* \param fetch Fetch to consider
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* \return Verifiable status of fetch
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*/
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bool fetch_get_verifiable(struct fetch *fetch);
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/**
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* Free a linked list of fetch_multipart_data.
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*
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* \param list Pointer to head of list to free
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*/
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void fetch_multipart_data_destroy(struct fetch_multipart_data *list);
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/**
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* Clone a linked list of fetch_multipart_data.
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*
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* \param list List to clone
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* \return Pointer to head of cloned list, or NULL on failure
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*/
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struct fetch_multipart_data *fetch_multipart_data_clone(const struct fetch_multipart_data *list);
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/**
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* send message to fetch
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*/
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void fetch_send_callback(const fetch_msg *msg, struct fetch *fetch);
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/**
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* remove a queued fetch
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*/
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void fetch_remove_from_queues(struct fetch *fetch);
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/**
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* Free a fetch structure and associated resources.
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*/
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void fetch_free(struct fetch *f);
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/**
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* set the http code of a fetch
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*/
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void fetch_set_http_code(struct fetch *fetch, long http_code);
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/**
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* get the referer from the fetch
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*/
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const char *fetch_get_referer_to_send(struct fetch *fetch);
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/**
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* set cookie data on a fetch
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*/
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void fetch_set_cookie(struct fetch *fetch, const char *data);
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#endif
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