2 * Copyright (c) 2004-2005 Sergey Lyubka <valenok@gmail.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included
12 * in all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
22 * $Id: shttpd.h,v 1.9 2008/02/13 20:44:32 drozd Exp $
25 #ifndef SHTTPD_HEADER_INCLUDED
26 #define SHTTPD_HEADER_INCLUDED
30 #endif /* __cplusplus */
33 char *buf; /* Buffer pointer */
34 int len; /* Size of a buffer */
35 int num_bytes; /* Bytes processed by callback */
39 * This structure is passed to the user callback function
42 void *priv; /* Private! Do not touch! */
43 void *state; /* User state */
44 void *user_data; /* User-defined data */
45 struct ubuf in; /* Input is here, POST data */
46 struct ubuf out; /* Output goes here */
48 #define SHTTPD_END_OF_OUTPUT 1
49 #define SHTTPD_CONNECTION_ERROR 2
50 #define SHTTPD_MORE_POST_DATA 4
51 #define SHTTPD_POST_BUFFER_FULL 8
52 #define SHTTPD_SSI_EVAL_TRUE 16
56 * User callback function. Called when certain registered URLs have been
57 * requested. These are the requirements to the callback function:
59 * 1. it must copy data into 'out.buf' buffer, not more than 'out.len' bytes,
60 * and record how many bytes are copied, into 'out.num_bytes'
61 * 2. it must not block the execution
62 * 3. it must set SHTTPD_END_OF_OUTPUT flag when finished
63 * 4. for POST requests, it must process the incoming data (in.buf) of length
64 * 'in.len', and set 'in.num_bytes', which is how many bytes of POST
65 * data is read and can be discarded by SHTTPD.
66 * 5. If callback allocates arg->state, to keep state, it must deallocate it
67 * at the end of coonection SHTTPD_CONNECTION_ERROR or SHTTPD_END_OF_OUTPUT
69 typedef void (*shttpd_callback_t)(struct shttpd_arg *);
72 * shttpd_init Initialize shttpd context.
73 * shttpd_set_option Set new value for option.
74 * shttpd_fini Dealocate the context
75 * shttpd_register_uri Setup the callback function for specified URL.
76 * shtppd_listen Setup a listening socket in the SHTTPD context
77 * shttpd_poll Do connections processing
78 * shttpd_version return string with SHTTPD version
79 * shttpd_get_var Fetch POST/GET variable value by name. Return value len
80 * shttpd_get_header return value of the specified HTTP header
81 * shttpd_get_env return string values for the following
82 * pseudo-variables: "REQUEST_METHOD", "REQUEST_URI",
83 * "REMOTE_USER" and "REMOTE_ADDR".
88 struct shttpd_ctx *shttpd_init(void);
89 void shttpd_set_option(struct shttpd_ctx *, const char *opt, const char *val);
90 void shttpd_fini(struct shttpd_ctx *);
91 int shttpd_listen(struct shttpd_ctx *ctx, int port, int is_ssl);
92 void shttpd_register_uri(struct shttpd_ctx *ctx, const char *uri,
93 shttpd_callback_t callback, void *const user_data);
94 void shttpd_poll(struct shttpd_ctx *, int milliseconds);
95 const char *shttpd_version(void);
96 int shttpd_get_var(const char *var, const char *buf, int buf_len,
97 char *value, int value_len);
98 const char *shttpd_get_header(struct shttpd_arg *, const char *header_name);
99 const char *shttpd_get_env(struct shttpd_arg *, const char *name);
100 void shttpd_get_http_version(struct shttpd_arg *,
101 unsigned long *major, unsigned long *minor);
102 size_t shttpd_printf(struct shttpd_arg *, const char *fmt, ...);
103 void shttpd_handle_error(struct shttpd_ctx *ctx, int status,
104 shttpd_callback_t func, void *const data);
105 void shttpd_register_ssi_func(struct shttpd_ctx *ctx, const char *name,
106 shttpd_callback_t func, void *const user_data);
109 * The following three functions are for applications that need to
110 * load-balance the connections on their own. Many threads may be spawned
111 * with one SHTTPD context per thread. Boss thread may only wait for
112 * new connections by means of shttpd_accept(). Then it may scan thread
113 * pool for the idle thread by means of shttpd_active(), and add new
114 * connection to the context by means of shttpd_add().
116 void shttpd_add_socket(struct shttpd_ctx *, int sock, int is_ssl);
117 int shttpd_accept(int lsn_sock, int milliseconds);
118 int shttpd_active(struct shttpd_ctx *);
123 #endif /* __cplusplus */
125 #endif /* SHTTPD_HEADER_INCLUDED */