196 строки
5.2 KiB
C
196 строки
5.2 KiB
C
/*
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* Copyright 2001-2007 Niels Provos <provos@citi.umich.edu>
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* Copyright 2007-2010 Niels Provos and Nick Mathewson
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*
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* This header file contains definitions for dealing with HTTP requests
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* that are internal to libevent. As user of the library, you should not
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* need to know about these.
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*/
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#ifndef _HTTP_INTERNAL_H_
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#define _HTTP_INTERNAL_H_
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#include "event2/event_struct.h"
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#include "util-internal.h"
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#include "defer-internal.h"
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#define HTTP_CONNECT_TIMEOUT 45
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#define HTTP_WRITE_TIMEOUT 50
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#define HTTP_READ_TIMEOUT 50
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#define HTTP_PREFIX "http://"
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#define HTTP_DEFAULTPORT 80
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enum message_read_status {
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ALL_DATA_READ = 1,
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MORE_DATA_EXPECTED = 0,
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DATA_CORRUPTED = -1,
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REQUEST_CANCELED = -2,
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DATA_TOO_LONG = -3
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};
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enum evhttp_connection_error {
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EVCON_HTTP_TIMEOUT,
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EVCON_HTTP_EOF,
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EVCON_HTTP_INVALID_HEADER,
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EVCON_HTTP_BUFFER_ERROR,
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EVCON_HTTP_REQUEST_CANCEL
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};
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struct evbuffer;
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struct addrinfo;
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struct evhttp_request;
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/* Indicates an unknown request method. */
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#define _EVHTTP_REQ_UNKNOWN (1<<15)
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enum evhttp_connection_state {
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EVCON_DISCONNECTED, /**< not currently connected not trying either*/
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EVCON_CONNECTING, /**< tries to currently connect */
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EVCON_IDLE, /**< connection is established */
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EVCON_READING_FIRSTLINE,/**< reading Request-Line (incoming conn) or
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**< Status-Line (outgoing conn) */
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EVCON_READING_HEADERS, /**< reading request/response headers */
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EVCON_READING_BODY, /**< reading request/response body */
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EVCON_READING_TRAILER, /**< reading request/response chunked trailer */
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EVCON_WRITING /**< writing request/response headers/body */
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};
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struct event_base;
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/* A client or server connection. */
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struct evhttp_connection {
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/* we use this tailq only if this connection was created for an http
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* server */
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TAILQ_ENTRY(evhttp_connection) next;
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evutil_socket_t fd;
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struct bufferevent *bufev;
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struct event retry_ev; /* for retrying connects */
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char *bind_address; /* address to use for binding the src */
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u_short bind_port; /* local port for binding the src */
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char *address; /* address to connect to */
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u_short port;
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size_t max_headers_size;
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ev_uint64_t max_body_size;
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int flags;
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#define EVHTTP_CON_INCOMING 0x0001 /* only one request on it ever */
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#define EVHTTP_CON_OUTGOING 0x0002 /* multiple requests possible */
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#define EVHTTP_CON_CLOSEDETECT 0x0004 /* detecting if persistent close */
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int timeout; /* timeout in seconds for events */
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int retry_cnt; /* retry count */
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int retry_max; /* maximum number of retries */
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enum evhttp_connection_state state;
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/* for server connections, the http server they are connected with */
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struct evhttp *http_server;
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TAILQ_HEAD(evcon_requestq, evhttp_request) requests;
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void (*cb)(struct evhttp_connection *, void *);
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void *cb_arg;
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void (*closecb)(struct evhttp_connection *, void *);
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void *closecb_arg;
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struct deferred_cb read_more_deferred_cb;
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struct event_base *base;
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struct evdns_base *dns_base;
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};
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/* A callback for an http server */
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struct evhttp_cb {
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TAILQ_ENTRY(evhttp_cb) next;
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char *what;
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void (*cb)(struct evhttp_request *req, void *);
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void *cbarg;
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};
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/* both the http server as well as the rpc system need to queue connections */
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TAILQ_HEAD(evconq, evhttp_connection);
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/* each bound socket is stored in one of these */
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struct evhttp_bound_socket {
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TAILQ_ENTRY(evhttp_bound_socket) next;
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struct evconnlistener *listener;
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};
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/* server alias list item. */
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struct evhttp_server_alias {
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TAILQ_ENTRY(evhttp_server_alias) next;
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char *alias; /* the server alias. */
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};
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struct evhttp {
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/* Next vhost, if this is a vhost. */
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TAILQ_ENTRY(evhttp) next_vhost;
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/* All listeners for this host */
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TAILQ_HEAD(boundq, evhttp_bound_socket) sockets;
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TAILQ_HEAD(httpcbq, evhttp_cb) callbacks;
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/* All live connections on this host. */
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struct evconq connections;
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TAILQ_HEAD(vhostsq, evhttp) virtualhosts;
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TAILQ_HEAD(aliasq, evhttp_server_alias) aliases;
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/* NULL if this server is not a vhost */
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char *vhost_pattern;
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int timeout;
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size_t default_max_headers_size;
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ev_uint64_t default_max_body_size;
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/* Bitmask of all HTTP methods that we accept and pass to user
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* callbacks. */
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ev_uint16_t allowed_methods;
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/* Fallback callback if all the other callbacks for this connection
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don't match. */
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void (*gencb)(struct evhttp_request *req, void *);
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void *gencbarg;
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struct event_base *base;
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};
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/* XXX most of these functions could be static. */
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/* resets the connection; can be reused for more requests */
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void evhttp_connection_reset(struct evhttp_connection *);
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/* connects if necessary */
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int evhttp_connection_connect(struct evhttp_connection *);
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/* notifies the current request that it failed; resets connection */
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void evhttp_connection_fail(struct evhttp_connection *,
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enum evhttp_connection_error error);
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enum message_read_status;
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enum message_read_status evhttp_parse_firstline(struct evhttp_request *, struct evbuffer*);
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enum message_read_status evhttp_parse_headers(struct evhttp_request *, struct evbuffer*);
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void evhttp_start_read(struct evhttp_connection *);
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/* response sending HTML the data in the buffer */
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void evhttp_response_code(struct evhttp_request *, int, const char *);
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void evhttp_send_page(struct evhttp_request *, struct evbuffer *);
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#endif /* _HTTP_H */
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