|
- /*
- * Copyright 2001-2007 Niels Provos <provos@citi.umich.edu>
- * Copyright 2007-2012 Niels Provos and Nick Mathewson
- *
- * This header file contains definitions for dealing with HTTP requests
- * that are internal to libevent. As user of the library, you should not
- * need to know about these.
- */
-
- #ifndef HTTP_INTERNAL_H_INCLUDED_
- #define HTTP_INTERNAL_H_INCLUDED_
-
- #include "event2/event_struct.h"
- #include "util-internal.h"
- #include "defer-internal.h"
-
- #define HTTP_CONNECT_TIMEOUT 45
- #define HTTP_WRITE_TIMEOUT 50
- #define HTTP_READ_TIMEOUT 50
-
- enum message_read_status {
- ALL_DATA_READ = 1,
- MORE_DATA_EXPECTED = 0,
- DATA_CORRUPTED = -1,
- REQUEST_CANCELED = -2,
- DATA_TOO_LONG = -3
- };
-
- struct evbuffer;
- struct addrinfo;
- struct evhttp_request;
-
- /* Indicates an unknown request method. */
- #define EVHTTP_REQ_UNKNOWN_ (1<<15)
-
- enum evhttp_connection_state {
- EVCON_DISCONNECTED, /**< not currently connected not trying either*/
- EVCON_CONNECTING, /**< tries to currently connect */
- EVCON_IDLE, /**< connection is established */
- EVCON_READING_FIRSTLINE,/**< reading Request-Line (incoming conn) or
- **< Status-Line (outgoing conn) */
- EVCON_READING_HEADERS, /**< reading request/response headers */
- EVCON_READING_BODY, /**< reading request/response body */
- EVCON_READING_TRAILER, /**< reading request/response chunked trailer */
- EVCON_WRITING /**< writing request/response headers/body */
- };
-
- struct event_base;
-
- /* A client or server connection. */
- struct evhttp_connection {
- /* we use this tailq only if this connection was created for an http
- * server */
- TAILQ_ENTRY(evhttp_connection) next;
-
- evutil_socket_t fd;
- struct bufferevent *bufev;
-
- struct event retry_ev; /* for retrying connects */
-
- char *bind_address; /* address to use for binding the src */
- ev_uint16_t bind_port; /* local port for binding the src */
-
- char *address; /* address to connect to */
- ev_uint16_t port;
-
- size_t max_headers_size;
- ev_uint64_t max_body_size;
-
- int flags;
- #define EVHTTP_CON_INCOMING 0x0001 /* only one request on it ever */
- #define EVHTTP_CON_OUTGOING 0x0002 /* multiple requests possible */
- #define EVHTTP_CON_CLOSEDETECT 0x0004 /* detecting if persistent close */
- /* set when we want to auto free the connection */
- #define EVHTTP_CON_AUTOFREE EVHTTP_CON_PUBLIC_FLAGS_END
- /* Installed when attempt to read HTTP error after write failed, see
- * EVHTTP_CON_READ_ON_WRITE_ERROR */
- #define EVHTTP_CON_READING_ERROR (EVHTTP_CON_AUTOFREE << 1)
-
- struct timeval timeout; /* timeout for events */
- int retry_cnt; /* retry count */
- int retry_max; /* maximum number of retries */
- struct timeval initial_retry_timeout; /* Timeout for low long to wait
- * after first failing attempt
- * before retry */
-
- enum evhttp_connection_state state;
-
- /* for server connections, the http server they are connected with */
- struct evhttp *http_server;
-
- TAILQ_HEAD(evcon_requestq, evhttp_request) requests;
-
- void (*cb)(struct evhttp_connection *, void *);
- void *cb_arg;
-
- void (*closecb)(struct evhttp_connection *, void *);
- void *closecb_arg;
-
- struct event_callback read_more_deferred_cb;
-
- struct event_base *base;
- struct evdns_base *dns_base;
- int ai_family;
- };
-
- /* A callback for an http server */
- struct evhttp_cb {
- TAILQ_ENTRY(evhttp_cb) next;
-
- char *what;
-
- void (*cb)(struct evhttp_request *req, void *);
- void *cbarg;
- };
-
- /* both the http server as well as the rpc system need to queue connections */
- TAILQ_HEAD(evconq, evhttp_connection);
-
- /* each bound socket is stored in one of these */
- struct evhttp_bound_socket {
- TAILQ_ENTRY(evhttp_bound_socket) next;
-
- struct evconnlistener *listener;
- };
-
- /* server alias list item. */
- struct evhttp_server_alias {
- TAILQ_ENTRY(evhttp_server_alias) next;
-
- char *alias; /* the server alias. */
- };
-
- struct evhttp {
- /* Next vhost, if this is a vhost. */
- TAILQ_ENTRY(evhttp) next_vhost;
-
- /* All listeners for this host */
- TAILQ_HEAD(boundq, evhttp_bound_socket) sockets;
-
- TAILQ_HEAD(httpcbq, evhttp_cb) callbacks;
-
- /* All live connections on this host. */
- struct evconq connections;
-
- TAILQ_HEAD(vhostsq, evhttp) virtualhosts;
-
- TAILQ_HEAD(aliasq, evhttp_server_alias) aliases;
-
- /* NULL if this server is not a vhost */
- char *vhost_pattern;
-
- struct timeval timeout;
-
- size_t default_max_headers_size;
- ev_uint64_t default_max_body_size;
- int flags;
- const char *default_content_type;
-
- /* Bitmask of all HTTP methods that we accept and pass to user
- * callbacks. */
- ev_uint16_t allowed_methods;
-
- /* Fallback callback if all the other callbacks for this connection
- don't match. */
- void (*gencb)(struct evhttp_request *req, void *);
- void *gencbarg;
- struct bufferevent* (*bevcb)(struct event_base *, void *);
- void *bevcbarg;
-
- struct event_base *base;
- };
-
- /* XXX most of these functions could be static. */
-
- /* resets the connection; can be reused for more requests */
- void evhttp_connection_reset_(struct evhttp_connection *);
-
- /* connects if necessary */
- int evhttp_connection_connect_(struct evhttp_connection *);
-
- enum evhttp_request_error;
- /* notifies the current request that it failed; resets connection */
- EVENT2_EXPORT_SYMBOL
- void evhttp_connection_fail_(struct evhttp_connection *,
- enum evhttp_request_error error);
-
- enum message_read_status;
-
- EVENT2_EXPORT_SYMBOL
- enum message_read_status evhttp_parse_firstline_(struct evhttp_request *, struct evbuffer*);
- EVENT2_EXPORT_SYMBOL
- enum message_read_status evhttp_parse_headers_(struct evhttp_request *, struct evbuffer*);
-
- void evhttp_start_read_(struct evhttp_connection *);
- void evhttp_start_write_(struct evhttp_connection *);
-
- /* response sending HTML the data in the buffer */
- void evhttp_response_code_(struct evhttp_request *, int, const char *);
- void evhttp_send_page_(struct evhttp_request *, struct evbuffer *);
-
- EVENT2_EXPORT_SYMBOL
- int evhttp_decode_uri_internal(const char *uri, size_t length,
- char *ret, int decode_plus);
-
- #endif /* HTTP_INTERNAL_H_INCLUDED_ */
|