263 lines
11 KiB
C
263 lines
11 KiB
C
/*
|
|
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification,
|
|
* are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
|
|
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
|
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
|
* OF SUCH DAMAGE.
|
|
*
|
|
* This file is part of the lwIP TCP/IP stack.
|
|
*
|
|
* Author: Adam Dunkels <adam@sics.se>
|
|
*
|
|
* This version of the file has been modified by Texas Instruments to offer
|
|
* simple server-side-include (SSI) and Common Gateway Interface (CGI)
|
|
* capability.
|
|
*/
|
|
|
|
#ifndef __HTTPD_H__
|
|
#define __HTTPD_H__
|
|
|
|
#include "lwip/opt.h"
|
|
#include "lwip/err.h"
|
|
#include "lwip/pbuf.h"
|
|
#include "lwip/tcp.h"
|
|
|
|
|
|
/** Set this to 1 to support CGI */
|
|
#ifndef LWIP_HTTPD_CGI
|
|
#define LWIP_HTTPD_CGI 0
|
|
#endif
|
|
|
|
/** Set this to 1 to support SSI (Server-Side-Includes) */
|
|
#ifndef LWIP_HTTPD_SSI
|
|
#define LWIP_HTTPD_SSI 0
|
|
#endif
|
|
|
|
/** Set this to 1 to support HTTP POST */
|
|
#ifndef LWIP_HTTPD_SUPPORT_POST
|
|
#define LWIP_HTTPD_SUPPORT_POST 0
|
|
#endif
|
|
|
|
#if LWIP_HTTPD_CGI
|
|
|
|
/*
|
|
* Function pointer for a CGI script handler.
|
|
*
|
|
* This function is called each time the HTTPD server is asked for a file
|
|
* whose name was previously registered as a CGI function using a call to
|
|
* http_set_cgi_handler. The iIndex parameter provides the index of the
|
|
* CGI within the ppcURLs array passed to http_set_cgi_handler. Parameters
|
|
* pcParam and pcValue provide access to the parameters provided along with
|
|
* the URI. iNumParams provides a count of the entries in the pcParam and
|
|
* pcValue arrays. Each entry in the pcParam array contains the name of a
|
|
* parameter with the corresponding entry in the pcValue array containing the
|
|
* value for that parameter. Note that pcParam may contain multiple elements
|
|
* with the same name if, for example, a multi-selection list control is used
|
|
* in the form generating the data.
|
|
*
|
|
* The function should return a pointer to a character string which is the
|
|
* path and filename of the response that is to be sent to the connected
|
|
* browser, for example "/thanks.htm" or "/response/error.ssi".
|
|
*
|
|
* The maximum number of parameters that will be passed to this function via
|
|
* iNumParams is defined by LWIP_HTTPD_MAX_CGI_PARAMETERS. Any parameters in the incoming
|
|
* HTTP request above this number will be discarded.
|
|
*
|
|
* Requests intended for use by this CGI mechanism must be sent using the GET
|
|
* method (which encodes all parameters within the URI rather than in a block
|
|
* later in the request). Attempts to use the POST method will result in the
|
|
* request being ignored.
|
|
*
|
|
*/
|
|
typedef const char *(*tCGIHandler)(int iIndex, int iNumParams, char *pcParam[],
|
|
char *pcValue[]);
|
|
|
|
/*
|
|
* Structure defining the base filename (URL) of a CGI and the associated
|
|
* function which is to be called when that URL is requested.
|
|
*/
|
|
typedef struct
|
|
{
|
|
const char *pcCGIName;
|
|
tCGIHandler pfnCGIHandler;
|
|
} tCGI;
|
|
|
|
void http_set_cgi_handlers(const tCGI *pCGIs, int iNumHandlers);
|
|
|
|
|
|
/* The maximum number of parameters that the CGI handler can be sent. */
|
|
#ifndef LWIP_HTTPD_MAX_CGI_PARAMETERS
|
|
#define LWIP_HTTPD_MAX_CGI_PARAMETERS 16
|
|
#endif
|
|
|
|
#endif /* LWIP_HTTPD_CGI */
|
|
|
|
#if LWIP_HTTPD_SSI
|
|
|
|
/** LWIP_HTTPD_SSI_MULTIPART==1: SSI handler function is called with 2 more
|
|
* arguments indicating a counter for insert string that are too long to be
|
|
* inserted at once: the SSI handler function must then set 'next_tag_part'
|
|
* which will be passed back to it in the next call. */
|
|
#ifndef LWIP_HTTPD_SSI_MULTIPART
|
|
#define LWIP_HTTPD_SSI_MULTIPART 0
|
|
#endif
|
|
|
|
/*
|
|
* Function pointer for the SSI tag handler callback.
|
|
*
|
|
* This function will be called each time the HTTPD server detects a tag of the
|
|
* form <!--#name--> in a .shtml, .ssi or .shtm file where "name" appears as
|
|
* one of the tags supplied to http_set_ssi_handler in the ppcTags array. The
|
|
* returned insert string, which will be appended after the the string
|
|
* "<!--#name-->" in file sent back to the client,should be written to pointer
|
|
* pcInsert. iInsertLen contains the size of the buffer pointed to by
|
|
* pcInsert. The iIndex parameter provides the zero-based index of the tag as
|
|
* found in the ppcTags array and identifies the tag that is to be processed.
|
|
*
|
|
* The handler returns the number of characters written to pcInsert excluding
|
|
* any terminating NULL or a negative number to indicate a failure (tag not
|
|
* recognized, for example).
|
|
*
|
|
* Note that the behavior of this SSI mechanism is somewhat different from the
|
|
* "normal" SSI processing as found in, for example, the Apache web server. In
|
|
* this case, the inserted text is appended following the SSI tag rather than
|
|
* replacing the tag entirely. This allows for an implementation that does not
|
|
* require significant additional buffering of output data yet which will still
|
|
* offer usable SSI functionality. One downside to this approach is when
|
|
* attempting to use SSI within JavaScript. The SSI tag is structured to
|
|
* resemble an HTML comment but this syntax does not constitute a comment
|
|
* within JavaScript and, hence, leaving the tag in place will result in
|
|
* problems in these cases. To work around this, any SSI tag which needs to
|
|
* output JavaScript code must do so in an encapsulated way, sending the whole
|
|
* HTML <script>...</script> section as a single include.
|
|
*/
|
|
typedef u16_t (*tSSIHandler)(int iIndex, char *pcInsert, int iInsertLen
|
|
#if LWIP_HTTPD_SSI_MULTIPART
|
|
, u16_t current_tag_part, u16_t *next_tag_part
|
|
#endif /* LWIP_HTTPD_SSI_MULTIPART */
|
|
#if LWIP_HTTPD_FILE_STATE
|
|
, void *connection_state
|
|
#endif /* LWIP_HTTPD_FILE_STATE */
|
|
);
|
|
|
|
void http_set_ssi_handler(tSSIHandler pfnSSIHandler,
|
|
const char **ppcTags, int iNumTags);
|
|
|
|
/* The maximum length of the string comprising the tag name */
|
|
#ifndef LWIP_HTTPD_MAX_TAG_NAME_LEN
|
|
#define LWIP_HTTPD_MAX_TAG_NAME_LEN 8
|
|
#endif
|
|
|
|
/* The maximum length of string that can be returned to replace any given tag */
|
|
#ifndef LWIP_HTTPD_MAX_TAG_INSERT_LEN
|
|
#define LWIP_HTTPD_MAX_TAG_INSERT_LEN 192
|
|
#endif
|
|
|
|
#endif /* LWIP_HTTPD_SSI */
|
|
|
|
#if LWIP_HTTPD_SUPPORT_POST
|
|
|
|
/* These functions must be implemented by the application */
|
|
|
|
/** Called when a POST request has been received. The application can decide
|
|
* whether to accept it or not.
|
|
*
|
|
* @param connection Unique connection identifier, valid until httpd_post_end
|
|
* is called.
|
|
* @param uri The HTTP header URI receiving the POST request.
|
|
* @param http_request The raw HTTP request (the first packet, normally).
|
|
* @param http_request_len Size of 'http_request'.
|
|
* @param content_len Content-Length from HTTP header.
|
|
* @param response_uri Filename of response file, to be filled when denying the
|
|
* request
|
|
* @param response_uri_len Size of the 'response_uri' buffer.
|
|
* @param post_auto_wnd Set this to 0 to let the callback code handle window
|
|
* updates by calling 'httpd_post_data_recved' (to throttle rx speed)
|
|
* default is 1 (httpd handles window updates automatically)
|
|
* @return ERR_OK: Accept the POST request, data may be passed in
|
|
* another err_t: Deny the POST request, send back 'bad request'.
|
|
*/
|
|
err_t httpd_post_begin(void *connection, const char *uri, const char *http_request,
|
|
u16_t http_request_len, int content_len, char *response_uri,
|
|
u16_t response_uri_len, u8_t *post_auto_wnd);
|
|
|
|
/** Called for each pbuf of data that has been received for a POST.
|
|
* ATTENTION: The application is responsible for freeing the pbufs passed in!
|
|
*
|
|
* @param connection Unique connection identifier.
|
|
* @param p Received data.
|
|
* @return ERR_OK: Data accepted.
|
|
* another err_t: Data denied, http_post_get_response_uri will be called.
|
|
*/
|
|
err_t httpd_post_receive_data(void *connection, struct pbuf *p);
|
|
|
|
/** Called when all data is received or when the connection is closed.
|
|
* The application must return the filename/URI of a file to send in response
|
|
* to this POST request. If the response_uri buffer is untouched, a 404
|
|
* response is returned.
|
|
*
|
|
* @param connection Unique connection identifier.
|
|
* @param response_uri Filename of response file, to be filled when denying the request
|
|
* @param response_uri_len Size of the 'response_uri' buffer.
|
|
*/
|
|
void httpd_post_finished(void *connection, char *response_uri, u16_t response_uri_len);
|
|
|
|
#ifndef LWIP_HTTPD_POST_MANUAL_WND
|
|
#define LWIP_HTTPD_POST_MANUAL_WND 0
|
|
#endif
|
|
|
|
#if LWIP_HTTPD_POST_MANUAL_WND
|
|
void httpd_post_data_recved(void *connection, u16_t recved_len);
|
|
#endif /* LWIP_HTTPD_POST_MANUAL_WND */
|
|
|
|
#endif /* LWIP_HTTPD_SUPPORT_POST */
|
|
|
|
enum {
|
|
WS_TEXT_MODE = 0x01,
|
|
WS_BIN_MODE = 0x02,
|
|
} WS_MODE;
|
|
|
|
typedef void (*tWsHandler)(struct tcp_pcb *pcb, uint8_t *data, u16_t data_len, uint8_t mode);
|
|
typedef void (*tWsOpenHandler)(struct tcp_pcb *pcb, const char *uri);
|
|
|
|
/**
|
|
* Write data into a websocket.
|
|
*
|
|
* @param pcb tcp_pcb to send.
|
|
* @param data data to send.
|
|
* @param len data length (should not exceed 125).
|
|
* @param mode WS_TEXT_MODE or WS_BIN_MODE.
|
|
* @return ERR_OK if write succeeded.
|
|
*/
|
|
err_t websocket_write(struct tcp_pcb *pcb, const uint8_t *data, uint16_t len, uint8_t mode);
|
|
|
|
/**
|
|
* Register websocket callback functions. Use NULL if callback is not needed.
|
|
*
|
|
* @param ws_open_cb called when new websocket is opened.
|
|
* @param ws_cb called when data is received from client.
|
|
*/
|
|
void websocket_register_callbacks(tWsOpenHandler ws_open_cb, tWsHandler ws_cb);
|
|
|
|
void httpd_init(void);
|
|
|
|
#endif /* __HTTPD_H__ */
|