Annotation of embedaddon/libevent/http-internal.h, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright 2001 Niels Provos <provos@citi.umich.edu>
3: * All rights reserved.
4: *
5: * This header file contains definitions for dealing with HTTP requests
6: * that are internal to libevent. As user of the library, you should not
7: * need to know about these.
8: */
9:
10: #ifndef _HTTP_H_
11: #define _HTTP_H_
12:
13: #define HTTP_CONNECT_TIMEOUT 45
14: #define HTTP_WRITE_TIMEOUT 50
15: #define HTTP_READ_TIMEOUT 50
16:
17: #define HTTP_PREFIX "http://"
18: #define HTTP_DEFAULTPORT 80
19:
20: enum message_read_status {
21: ALL_DATA_READ = 1,
22: MORE_DATA_EXPECTED = 0,
23: DATA_CORRUPTED = -1,
24: REQUEST_CANCELED = -2
25: };
26:
27: enum evhttp_connection_error {
28: EVCON_HTTP_TIMEOUT,
29: EVCON_HTTP_EOF,
30: EVCON_HTTP_INVALID_HEADER
31: };
32:
33: struct evbuffer;
34: struct addrinfo;
35: struct evhttp_request;
36:
37: /* A stupid connection object - maybe make this a bufferevent later */
38:
39: enum evhttp_connection_state {
40: EVCON_DISCONNECTED, /**< not currently connected not trying either*/
41: EVCON_CONNECTING, /**< tries to currently connect */
42: EVCON_IDLE, /**< connection is established */
43: EVCON_READING_FIRSTLINE,/**< reading Request-Line (incoming conn) or
44: **< Status-Line (outgoing conn) */
45: EVCON_READING_HEADERS, /**< reading request/response headers */
46: EVCON_READING_BODY, /**< reading request/response body */
47: EVCON_READING_TRAILER, /**< reading request/response chunked trailer */
48: EVCON_WRITING /**< writing request/response headers/body */
49: };
50:
51: struct event_base;
52:
53: struct evhttp_connection {
54: /* we use tailq only if they were created for an http server */
55: TAILQ_ENTRY(evhttp_connection) (next);
56:
57: int fd;
58: struct event ev;
59: struct event close_ev;
60: struct evbuffer *input_buffer;
61: struct evbuffer *output_buffer;
62:
63: char *bind_address; /* address to use for binding the src */
64: u_short bind_port; /* local port for binding the src */
65:
66: char *address; /* address to connect to */
67: u_short port;
68:
69: int flags;
70: #define EVHTTP_CON_INCOMING 0x0001 /* only one request on it ever */
71: #define EVHTTP_CON_OUTGOING 0x0002 /* multiple requests possible */
72: #define EVHTTP_CON_CLOSEDETECT 0x0004 /* detecting if persistent close */
73:
74: int timeout; /* timeout in seconds for events */
75: int retry_cnt; /* retry count */
76: int retry_max; /* maximum number of retries */
77:
78: enum evhttp_connection_state state;
79:
80: /* for server connections, the http server they are connected with */
81: struct evhttp *http_server;
82:
83: TAILQ_HEAD(evcon_requestq, evhttp_request) requests;
84:
85: void (*cb)(struct evhttp_connection *, void *);
86: void *cb_arg;
87:
88: void (*closecb)(struct evhttp_connection *, void *);
89: void *closecb_arg;
90:
91: struct event_base *base;
92: };
93:
94: struct evhttp_cb {
95: TAILQ_ENTRY(evhttp_cb) next;
96:
97: char *what;
98:
99: void (*cb)(struct evhttp_request *req, void *);
100: void *cbarg;
101: };
102:
103: /* both the http server as well as the rpc system need to queue connections */
104: TAILQ_HEAD(evconq, evhttp_connection);
105:
106: /* each bound socket is stored in one of these */
107: struct evhttp_bound_socket {
108: TAILQ_ENTRY(evhttp_bound_socket) (next);
109:
110: struct event bind_ev;
111: };
112:
113: struct evhttp {
114: TAILQ_HEAD(boundq, evhttp_bound_socket) sockets;
115:
116: TAILQ_HEAD(httpcbq, evhttp_cb) callbacks;
117: struct evconq connections;
118:
119: int timeout;
120:
121: void (*gencb)(struct evhttp_request *req, void *);
122: void *gencbarg;
123:
124: struct event_base *base;
125: };
126:
127: /* resets the connection; can be reused for more requests */
128: void evhttp_connection_reset(struct evhttp_connection *);
129:
130: /* connects if necessary */
131: int evhttp_connection_connect(struct evhttp_connection *);
132:
133: /* notifies the current request that it failed; resets connection */
134: void evhttp_connection_fail(struct evhttp_connection *,
135: enum evhttp_connection_error error);
136:
137: void evhttp_get_request(struct evhttp *, int, struct sockaddr *, socklen_t);
138:
139: int evhttp_hostportfile(char *, char **, u_short *, char **);
140:
141: int evhttp_parse_firstline(struct evhttp_request *, struct evbuffer*);
142: int evhttp_parse_headers(struct evhttp_request *, struct evbuffer*);
143:
144: void evhttp_start_read(struct evhttp_connection *);
145: void evhttp_make_header(struct evhttp_connection *, struct evhttp_request *);
146:
147: void evhttp_write_buffer(struct evhttp_connection *,
148: void (*)(struct evhttp_connection *, void *), void *);
149:
150: /* response sending HTML the data in the buffer */
151: void evhttp_response_code(struct evhttp_request *, int, const char *);
152: void evhttp_send_page(struct evhttp_request *, struct evbuffer *);
153:
154: #endif /* _HTTP_H */
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