110 lines
4.4 KiB
C
110 lines
4.4 KiB
C
/*
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* Copyright (c) 2004-2008 Sergey Lyubka <valenok@gmail.com>
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* All rights reserved
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*
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* "THE BEER-WARE LICENSE" (Revision 42):
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* Sergey Lyubka wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return.
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*
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* $Id: shttpd.h,v 1.16 2008/05/31 09:02:02 drozd Exp $
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*/
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#ifndef SHTTPD_HEADER_INCLUDED
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#define SHTTPD_HEADER_INCLUDED
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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struct ubuf {
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char *buf; /* Buffer pointer */
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int len; /* Size of a buffer */
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int num_bytes; /* Bytes processed by callback */
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};
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/*
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* This structure is passed to the user callback function
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*/
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struct shttpd_arg {
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void *priv; /* Private! Do not touch! */
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void *state; /* User state */
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void *user_data; /* Data from register_uri() */
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struct ubuf in; /* Input is here, POST data */
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struct ubuf out; /* Output goes here */
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unsigned int flags;
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#define SHTTPD_END_OF_OUTPUT 1 /* No more data do send */
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#define SHTTPD_CONNECTION_ERROR 2 /* Server closed the connection */
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#define SHTTPD_MORE_POST_DATA 4 /* arg->in has incomplete data */
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#define SHTTPD_POST_BUFFER_FULL 8 /* arg->in has max data */
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#define SHTTPD_SSI_EVAL_TRUE 16 /* SSI eval callback must set it*/
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#define SHTTPD_SUSPEND 32 /* User wants to suspend output */
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};
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/*
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* User callback function. Called when certain registered URLs have been
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* requested. These are the requirements to the callback function:
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*
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* 1. It must copy data into 'out.buf' buffer, not more than 'out.len' bytes,
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* and record how many bytes are copied, into 'out.num_bytes'
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* 2. It must not call any blocking functions
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* 3. It must set SHTTPD_END_OF_OUTPUT flag when there is no more data to send
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* 4. For POST requests, it must process the incoming data (in.buf) of length
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* 'in.len', and set 'in.num_bytes', which is how many bytes of POST
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* data was processed and can be discarded by SHTTPD.
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* 5. If callback allocates arg->state, to keep state, it must deallocate it
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* at the end of coonection SHTTPD_CONNECTION_ERROR or SHTTPD_END_OF_OUTPUT
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* 6. If callback function wants to suspend until some event, it must store
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* arg->priv pointer elsewhere, set SHTTPD_SUSPEND flag and return. When
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* the event happens, user code should call shttpd_wakeup(priv).
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* It is safe to call shttpd_wakeup() from any thread. User code must
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* not call shttpd_wakeup once the connection is closed.
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*/
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typedef void (*shttpd_callback_t)(struct shttpd_arg *);
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/*
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* shttpd_init Initialize shttpd context
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* shttpd_fini Dealocate the context, close all connections
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* shttpd_set_option Set new value for option
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* shttpd_register_uri Setup the callback function for specified URL
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* shttpd_poll Do connections processing
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* shttpd_version return string with SHTTPD version
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* shttpd_get_var Fetch POST/GET variable value by name. Return value len
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* shttpd_get_header return value of the specified HTTP header
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* shttpd_get_env return values for the following pseudo-variables:
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"REQUEST_METHOD", "REQUEST_URI",
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* "REMOTE_USER" and "REMOTE_ADDR"
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* shttpd_printf helper function to output data
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* shttpd_handle_error register custom HTTP error handler
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* shttpd_wakeup clear SHTTPD_SUSPEND state for the connection
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*/
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struct shttpd_ctx;
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struct shttpd_ctx *shttpd_init(int argc, char *argv[]);
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void shttpd_set_option(struct shttpd_ctx *, const char *opt, const char *val);
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void shttpd_fini(struct shttpd_ctx *);
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void shttpd_register_uri(struct shttpd_ctx *ctx, const char *uri,
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shttpd_callback_t callback, void *const user_data);
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void shttpd_poll(struct shttpd_ctx *, int milliseconds);
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const char *shttpd_version(void);
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int shttpd_get_var(const char *var, const char *buf, int buf_len,
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char *value, int value_len);
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const char *shttpd_get_header(struct shttpd_arg *, const char *header_name);
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const char *shttpd_get_env(struct shttpd_arg *, const char *name);
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void shttpd_get_http_version(struct shttpd_arg *,
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unsigned long *major, unsigned long *minor);
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size_t shttpd_printf(struct shttpd_arg *, const char *fmt, ...);
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void shttpd_handle_error(struct shttpd_ctx *ctx, int status,
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shttpd_callback_t func, void *const data);
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void shttpd_register_ssi_func(struct shttpd_ctx *ctx, const char *name,
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shttpd_callback_t func, void *const user_data);
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void shttpd_wakeup(const void *priv);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* SHTTPD_HEADER_INCLUDED */
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