/* $NetBSD: http-internal.h,v 1.1.1.2 2013/04/11 16:43:24 christos Exp $ */ /* * Copyright 2001-2007 Niels Provos * 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_ #define _HTTP_INTERNAL_H_ #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 #define HTTP_PREFIX "http://" #define HTTP_DEFAULTPORT 80 enum message_read_status { ALL_DATA_READ = 1, MORE_DATA_EXPECTED = 0, DATA_CORRUPTED = -1, REQUEST_CANCELED = -2, DATA_TOO_LONG = -3 }; enum evhttp_connection_error { EVCON_HTTP_TIMEOUT, EVCON_HTTP_EOF, EVCON_HTTP_INVALID_HEADER, EVCON_HTTP_BUFFER_ERROR, EVCON_HTTP_REQUEST_CANCEL }; 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 */ u_short bind_port; /* local port for binding the src */ char *address; /* address to connect to */ u_short 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 */ int timeout; /* timeout in seconds for events */ int retry_cnt; /* retry count */ int retry_max; /* maximum number of retries */ 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 deferred_cb read_more_deferred_cb; struct event_base *base; struct evdns_base *dns_base; }; /* 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; int timeout; size_t default_max_headers_size; ev_uint64_t default_max_body_size; /* 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 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 *); /* notifies the current request that it failed; resets connection */ void evhttp_connection_fail(struct evhttp_connection *, enum evhttp_connection_error error); enum message_read_status; enum message_read_status evhttp_parse_firstline(struct evhttp_request *, struct evbuffer*); enum message_read_status evhttp_parse_headers(struct evhttp_request *, struct evbuffer*); void evhttp_start_read(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 *); #endif /* _HTTP_H */