dynhndlr.c

C语言实现的一个简易的HTTP服务器源代码

/*
 *  Embedded HTTP Server Dynamic Handler Utilities
 *
 *  ./software/ch7/emhttps/dynhndlr.c
 *
 *  [e-mail]
 *
 */

#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include "filehdlr.h"

static int init = 0;

#define MAX_DYNAMIC_HANDLERS	5

struct dynamicHandlerStructure {
  char fileName[80];
  char *(*pfunc)();
} dynamicHandler[MAX_DYNAMIC_HANDLERS];


/*----------------------------------------------------------------------------
 * initHandlers() - Initialize the dynamic handler array       
 *--------------------------------------------------------------------------*/
void initHandlers()
{
  int i;

  for (i = 0 ; i < MAX_DYNAMIC_HANDLERS ; i++) {
    dynamicHandler[i].fileName[0] = 0;
    dynamicHandler[i].pfunc = NULL;
  }
}


/*----------------------------------------------------------------------------
 * addDynamicHandler() - Add a new handler to the dynamic handler array
 *--------------------------------------------------------------------------*/
int addDynamicHandler(char *name, char *(*function)()) 
{
  int i;

  if (!init) {
    initHandlers();
    init=1;
  }

  /* First, ensure that the 'name' does not exist in the current list */
  for (i = 0 ; i < MAX_DYNAMIC_HANDLERS ; i++) {
    if (dynamicHandler[i].fileName[0] != 0) {
      if (!strcmp(name, dynamicHandler[i].fileName)) {
        return(-1);
      }
    }
  }

  /* Next, look for an empty slot */
  for (i = 0 ; i < MAX_DYNAMIC_HANDLERS ; i++) {
    if (dynamicHandler[i].fileName[0] == 0) {
      strncpy(dynamicHandler[i].fileName, name, 80);
      dynamicHandler[i].pfunc = function;
    }
  }

  return(0); 
}


/*----------------------------------------------------------------------------
 * callDynamicHandler() - Call the dynamic handler for a particular entry
 *--------------------------------------------------------------------------*/
int callDynamicHandler(char *name, char *content)
{
  int j, found=-1;

  if (!init) {
    initHandlers();
    init=1;
  }

  for (j = 0 ; j < MAX_DYNAMIC_HANDLERS ; j++) {

    if (!strcmp(name, dynamicHandler[j].fileName)) {
      dynamicHandler[j].pfunc(content);
      found = 0;
      break;
    }

  }

  return found;
}


int parseVariable( char *msgbody, char *variable, char *value)
{
  int i = 0;

  /* First, find the variable in the message body */
  msgbody = strstr(msgbody, variable);

  if (msgbody == NULL) return -1;

  /* Skip the variable and the '=' */
  msgbody += strlen(variable) + 1;

  /* Finally, copy the value into the value string */
  while (msgbody[i] != '&') {
    value[i] = msgbody[i];
    i++;
  }

  value[i] = 0;

  return 0;
}

/*
 *  Copyright (c) 2002 Charles River Media.  All rights reserved.
 * 
 *  Redistribution and use in source and binary forms, with or 
 *  without modification, is hereby granted without fee 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.  Neither the name of Charles River Media nor the names of 
 *        its contributors may be used to endorse or promote products 
 *        derived from this software without specific prior 
 *        written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY CHARLES RIVER MEDIA AND CONTRIBUTERS 
 * 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CHARLES
 * RIVER MEDIA OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARAY, 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.
 */