2 * Copyright (c) 2004-2008 Sergey Lyubka <valenok@gmail.com>
5 * "THE BEER-WARE LICENSE" (Revision 42):
6 * Sergey Lyubka wrote this file. As long as you retain this notice you
7 * can do whatever you want with this stuff. If we meet some day, and you think
8 * this stuff is worth it, you can buy me a beer in return.
10 * $Id: shttpd.h,v 1.18 2008/08/23 08:34:50 drozd Exp $
13 #ifndef SHTTPD_HEADER_INCLUDED
14 #define SHTTPD_HEADER_INCLUDED
18 #endif /* __cplusplus */
21 char *buf; /* Buffer pointer */
22 int len; /* Size of a buffer */
23 int num_bytes; /* Bytes processed by callback */
27 * This structure is passed to the user callback function
30 void *priv; /* Private! Do not touch! */
31 void *state; /* User state */
32 void *user_data; /* Data from register_uri() */
33 struct ubuf in; /* Input is here, POST data */
34 struct ubuf out; /* Output goes here */
37 #define SHTTPD_END_OF_OUTPUT 1 /* No more data do send */
38 #define SHTTPD_CONNECTION_ERROR 2 /* Server closed the connection */
39 #define SHTTPD_MORE_POST_DATA 4 /* arg->in has incomplete data */
40 #define SHTTPD_POST_BUFFER_FULL 8 /* arg->in has max data */
41 #define SHTTPD_SSI_EVAL_TRUE 16 /* SSI eval callback must set it*/
42 #define SHTTPD_SUSPEND 32 /* User wants to suspend output */
46 * User callback function. Called when certain registered URLs have been
47 * requested. These are the requirements to the callback function:
49 * 1. It must copy data into 'out.buf' buffer, not more than 'out.len' bytes,
50 * and record how many bytes are copied, into 'out.num_bytes'
51 * 2. It must not call any blocking functions
52 * 3. It must set SHTTPD_END_OF_OUTPUT flag when there is no more data to send
53 * 4. For POST requests, it must process the incoming data (in.buf) of length
54 * 'in.len', and set 'in.num_bytes', which is how many bytes of POST
55 * data was processed and can be discarded by SHTTPD.
56 * 5. If callback allocates arg->state, to keep state, it must deallocate it
57 * at the end of coonection SHTTPD_CONNECTION_ERROR or SHTTPD_END_OF_OUTPUT
58 * 6. If callback function wants to suspend until some event, it must store
59 * arg->priv pointer elsewhere, set SHTTPD_SUSPEND flag and return. When
60 * the event happens, user code should call shttpd_wakeup(priv).
61 * It is safe to call shttpd_wakeup() from any thread. User code must
62 * not call shttpd_wakeup once the connection is closed.
64 typedef void (*shttpd_callback_t)(struct shttpd_arg *);
67 * shttpd_init Initialize shttpd context
68 * shttpd_fini Dealocate the context, close all connections
69 * shttpd_set_option Set new value for option
70 * shttpd_register_uri Setup the callback function for specified URL
71 * shttpd_poll Do connections processing
72 * shttpd_version return string with SHTTPD version
73 * shttpd_get_var Fetch POST/GET variable value by name. Return value len
74 * shttpd_get_header return value of the specified HTTP header
75 * shttpd_get_env return values for the following pseudo-variables:
76 "REQUEST_METHOD", "REQUEST_URI",
77 * "REMOTE_USER" and "REMOTE_ADDR"
78 * shttpd_printf helper function to output data
79 * shttpd_handle_error register custom HTTP error handler
80 * shttpd_wakeup clear SHTTPD_SUSPEND state for the connection
85 struct shttpd_ctx *shttpd_init(int argc, char *argv[]);
86 int shttpd_set_option(struct shttpd_ctx *, const char *opt, const char *val);
87 void shttpd_fini(struct shttpd_ctx *);
88 void shttpd_register_uri(struct shttpd_ctx *ctx, const char *uri,
89 shttpd_callback_t callback, void *const user_data);
90 void shttpd_poll(struct shttpd_ctx *, int milliseconds);
91 const char *shttpd_version(void);
92 int shttpd_get_var(const char *var, const char *buf, int buf_len,
93 char *value, int value_len);
94 const char *shttpd_get_header(struct shttpd_arg *, const char *header_name);
95 const char *shttpd_get_env(struct shttpd_arg *, const char *name);
96 void shttpd_get_http_version(struct shttpd_arg *,
97 unsigned long *major, unsigned long *minor);
98 size_t shttpd_printf(struct shttpd_arg *, const char *fmt, ...);
99 void shttpd_handle_error(struct shttpd_ctx *ctx, int status,
100 shttpd_callback_t func, void *const data);
101 void shttpd_register_ssi_func(struct shttpd_ctx *ctx, const char *name,
102 shttpd_callback_t func, void *const user_data);
103 void shttpd_wakeup(const void *priv);
104 int shttpd_join(struct shttpd_ctx *, fd_set *, fd_set *, int *max_fd);
105 int shttpd_socketpair(int sp[2]);
109 #endif /* __cplusplus */
111 #endif /* SHTTPD_HEADER_INCLUDED */