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Diffstat (limited to 'libevent/http-internal.h')
| -rw-r--r-- | libevent/http-internal.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/libevent/http-internal.h b/libevent/http-internal.h new file mode 100644 index 0000000..feaf436 --- /dev/null +++ b/libevent/http-internal.h @@ -0,0 +1,206 @@ +/* + * 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_ */ |