http.h

Go to the documentation of this file.

/*
 * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef _EVENT2_HTTP_H_
#define _EVENT2_HTTP_H_

/* For int types. */
#include <event2/util.h>

#ifdef __cplusplus
extern "C" {
#endif

/* In case we haven't included the right headers yet. */
struct evbuffer;
struct event_base;

/* Response codes */
#define HTTP_OK         200 
#define HTTP_NOCONTENT      204 
#define HTTP_MOVEPERM       301 
#define HTTP_MOVETEMP       302 
#define HTTP_NOTMODIFIED    304 
#define HTTP_BADREQUEST     400 
#define HTTP_NOTFOUND       404 
#define HTTP_BADMETHOD      405     
#define HTTP_ENTITYTOOLARGE 413 
#define HTTP_EXPECTATIONFAILED  417 
#define HTTP_INTERNAL           500     
#define HTTP_NOTIMPLEMENTED     501     
#define HTTP_SERVUNAVAIL    503 
struct evhttp;
struct evhttp_request;
struct evkeyvalq;
struct evhttp_bound_socket;
struct evconnlistener;

struct evhttp *evhttp_new(struct event_base *base);

int evhttp_bind_socket(struct evhttp *http, const char *address, ev_uint16_t port);

struct evhttp_bound_socket *evhttp_bind_socket_with_handle(struct evhttp *http, const char *address, ev_uint16_t port);

int evhttp_accept_socket(struct evhttp *http, evutil_socket_t fd);

struct evhttp_bound_socket *evhttp_accept_socket_with_handle(struct evhttp *http, evutil_socket_t fd);

struct evhttp_bound_socket *evhttp_bind_listener(struct evhttp *http, struct evconnlistener *listener);

struct evconnlistener *evhttp_bound_socket_get_listener(struct evhttp_bound_socket *bound);

void evhttp_del_accept_socket(struct evhttp *http, struct evhttp_bound_socket *bound_socket);

evutil_socket_t evhttp_bound_socket_get_fd(struct evhttp_bound_socket *bound_socket);

void evhttp_free(struct evhttp* http);

void evhttp_set_max_headers_size(struct evhttp* http, ev_ssize_t max_headers_size);
void evhttp_set_max_body_size(struct evhttp* http, ev_ssize_t max_body_size);

void evhttp_set_allowed_methods(struct evhttp* http, ev_uint16_t methods);

int evhttp_set_cb(struct evhttp *http, const char *path,
    void (*cb)(struct evhttp_request *, void *), void *cb_arg);

int evhttp_del_cb(struct evhttp *, const char *);

void evhttp_set_gencb(struct evhttp *http,
    void (*cb)(struct evhttp_request *, void *), void *arg);

int evhttp_add_virtual_host(struct evhttp* http, const char *pattern,
    struct evhttp* vhost);

int evhttp_remove_virtual_host(struct evhttp* http, struct evhttp* vhost);

int evhttp_add_server_alias(struct evhttp *http, const char *alias);

int evhttp_remove_server_alias(struct evhttp *http, const char *alias);

void evhttp_set_timeout(struct evhttp *http, int timeout_in_secs);

/* Request/Response functionality */

void evhttp_send_error(struct evhttp_request *req, int error,
    const char *reason);

void evhttp_send_reply(struct evhttp_request *req, int code,
    const char *reason, struct evbuffer *databuf);

/* Low-level response interface, for streaming/chunked replies */

void evhttp_send_reply_start(struct evhttp_request *req, int code,
    const char *reason);

void evhttp_send_reply_chunk(struct evhttp_request *req,
    struct evbuffer *databuf);
void evhttp_send_reply_end(struct evhttp_request *req);

/*
 * Interfaces for making requests
 */

enum evhttp_cmd_type {
    EVHTTP_REQ_GET     = 1 << 0,
    EVHTTP_REQ_POST    = 1 << 1,
    EVHTTP_REQ_HEAD    = 1 << 2,
    EVHTTP_REQ_PUT     = 1 << 3,
    EVHTTP_REQ_DELETE  = 1 << 4,
    EVHTTP_REQ_OPTIONS = 1 << 5,
    EVHTTP_REQ_TRACE   = 1 << 6,
    EVHTTP_REQ_CONNECT = 1 << 7,
    EVHTTP_REQ_PATCH   = 1 << 8
};

enum evhttp_request_kind { EVHTTP_REQUEST, EVHTTP_RESPONSE };

struct evhttp_request *evhttp_request_new(
    void (*cb)(struct evhttp_request *, void *), void *arg);

void evhttp_request_set_chunked_cb(struct evhttp_request *,
    void (*cb)(struct evhttp_request *, void *));

void evhttp_request_free(struct evhttp_request *req);

struct evdns_base;

struct evhttp_connection *evhttp_connection_base_new(
    struct event_base *base, struct evdns_base *dnsbase,
    const char *address, unsigned short port);

struct bufferevent *evhttp_connection_get_bufferevent(
    struct evhttp_connection *evcon);

void evhttp_request_own(struct evhttp_request *req);

int evhttp_request_is_owned(struct evhttp_request *req);

struct evhttp_connection *evhttp_request_get_connection(struct evhttp_request *req);

struct event_base *evhttp_connection_get_base(struct evhttp_connection *req);

void evhttp_connection_set_max_headers_size(struct evhttp_connection *evcon,
    ev_ssize_t new_max_headers_size);

void evhttp_connection_set_max_body_size(struct evhttp_connection* evcon,
    ev_ssize_t new_max_body_size);

void evhttp_connection_free(struct evhttp_connection *evcon);

void evhttp_connection_set_local_address(struct evhttp_connection *evcon,
    const char *address);

void evhttp_connection_set_local_port(struct evhttp_connection *evcon,
    ev_uint16_t port);

void evhttp_connection_set_timeout(struct evhttp_connection *evcon,
    int timeout_in_secs);

void evhttp_connection_set_retries(struct evhttp_connection *evcon,
    int retry_max);

void evhttp_connection_set_closecb(struct evhttp_connection *evcon,
    void (*)(struct evhttp_connection *, void *), void *);

void evhttp_connection_get_peer(struct evhttp_connection *evcon,
    char **address, ev_uint16_t *port);

int evhttp_make_request(struct evhttp_connection *evcon,
    struct evhttp_request *req,
    enum evhttp_cmd_type type, const char *uri);

void evhttp_cancel_request(struct evhttp_request *req);

struct evhttp_uri;

const char *evhttp_request_get_uri(const struct evhttp_request *req);
const struct evhttp_uri *evhttp_request_get_evhttp_uri(const struct evhttp_request *req);
enum evhttp_cmd_type evhttp_request_get_command(const struct evhttp_request *req);

int evhttp_request_get_response_code(const struct evhttp_request *req);

struct evkeyvalq *evhttp_request_get_input_headers(struct evhttp_request *req);
struct evkeyvalq *evhttp_request_get_output_headers(struct evhttp_request *req);
struct evbuffer *evhttp_request_get_input_buffer(struct evhttp_request *req);
struct evbuffer *evhttp_request_get_output_buffer(struct evhttp_request *req);
const char *evhttp_request_get_host(struct evhttp_request *req);

/* Interfaces for dealing with HTTP headers */

const char *evhttp_find_header(const struct evkeyvalq *headers,
    const char *key);

int evhttp_remove_header(struct evkeyvalq *headers, const char *key);

int evhttp_add_header(struct evkeyvalq *headers, const char *key, const char *value);

void evhttp_clear_headers(struct evkeyvalq *headers);

/* Miscellaneous utility functions */


char *evhttp_encode_uri(const char *str);

char *evhttp_uriencode(const char *str, ev_ssize_t size, int space_to_plus);

char *evhttp_decode_uri(const char *uri);

char *evhttp_uridecode(const char *uri, int decode_plus,
    size_t *size_out);

int evhttp_parse_query(const char *uri, struct evkeyvalq *headers);

int evhttp_parse_query_str(const char *uri, struct evkeyvalq *headers);

char *evhttp_htmlescape(const char *html);

struct evhttp_uri *evhttp_uri_new(void);

void evhttp_uri_set_flags(struct evhttp_uri *uri, unsigned flags);

const char *evhttp_uri_get_scheme(const struct evhttp_uri *uri);
const char *evhttp_uri_get_userinfo(const struct evhttp_uri *uri);
const char *evhttp_uri_get_host(const struct evhttp_uri *uri);
int evhttp_uri_get_port(const struct evhttp_uri *uri);
const char *evhttp_uri_get_path(const struct evhttp_uri *uri);
const char *evhttp_uri_get_query(const struct evhttp_uri *uri);
const char *evhttp_uri_get_fragment(const struct evhttp_uri *uri);

int evhttp_uri_set_scheme(struct evhttp_uri *uri, const char *scheme);
int evhttp_uri_set_userinfo(struct evhttp_uri *uri, const char *userinfo);
int evhttp_uri_set_host(struct evhttp_uri *uri, const char *host);
int evhttp_uri_set_port(struct evhttp_uri *uri, int port);
int evhttp_uri_set_path(struct evhttp_uri *uri, const char *path);
int evhttp_uri_set_query(struct evhttp_uri *uri, const char *query);
int evhttp_uri_set_fragment(struct evhttp_uri *uri, const char *fragment);

struct evhttp_uri *evhttp_uri_parse_with_flags(const char *source_uri,
    unsigned flags);

#define EVHTTP_URI_NONCONFORMANT 0x01

struct evhttp_uri *evhttp_uri_parse(const char *source_uri);

void evhttp_uri_free(struct evhttp_uri *uri);

char *evhttp_uri_join(struct evhttp_uri *uri, char *buf, size_t limit);

#ifdef __cplusplus
}
#endif

#endif /* _EVENT2_HTTP_H_ */