/* * 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" #include "event2/http.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; bev_factory_cb bufcb; void *bufcb_arg; 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; int chunked; 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_ */