利用c語言編製cgi實現搜尋

來源:互聯網
上載者:User

1. 環境
  /usr/local/apache/htdocs/ (待檢索的檔案在該目錄下)
  /usr/local/apache/temp/ (作為中轉的檔案夾)
  /usr/local/apache/cgi-bin/
  2. 將gcc search.c產生的a.out放置在/usr/local/apache/cgi-bin/中,使用權限設定為nobody可
  以執行。
  3. chown -R nobody.nobody /usr/local/apache/temp
  4. 在/etc/cron.daily中增加一個檔案deletetemp 許可權為555
  rm -f /usr/local/apache/temp/*
  5. 在/etc/cron.hourly中增加一個檔案myupdate 許可權為555
  updatedb -U /usr/local/apache/htdocs
  6. 刪除/etc/cron.daily中的一個檔案slocate.cron
  
  附錄(共2條):
  1. index.htm的源碼
  <html>
  <head>
  <title>Untitled Document</title>
  <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
  </head>
  
  <body>
  <p>請輸入你的查詢字串</p>
  <form name="form1" action="http://129.158.217.223/cgi-bin/a.out">
  <p> </p>
  <p>
  <input name="keyname" value="" type=text>
  </p>
  <p>
  <input type="submit" value="查詢">
  </p>
  </form>
  <p> </p>
  </body>
  </html>
  
  2. search.c的源碼
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <sys/types.h>
  #include <fcntl.h>
  
  int main(int argc, char* argv())
  {
  int fd;
  int status;
  time_t i;
  char cFileName(64);
  char cTempName(64);
  char cBuffer(1024);
  char *p = cBuffer;
  char cContent(10240);
  
  char *data;
  char keyword(1024);
  data = getenv("QUERY_STRING");
  if(data==NULL)
  {
  printf("Content-Type:text/html ");
  printf("not found!");
  exit(1);
  }
  
  sscanf(data, "keyname=%s&", keyword);
  
  p += sprintf(p, "locate '%s' | sed -e 's#^/usr/local/apache/htdocs#http://129.158.217.223#' | sed -e 's#^.*$#<a href=&>&</a>
  #' > ", keyword);
  i = time(NULL);
  
  sprintf(cTempName, "%d.html", i);
  sprintf(cFileName, "/usr/local/apache/temp/%d.html", i);
  strcat(cBuffer, cFileName);
  cBuffer(1024-1)=0;
  
  system(cBuffer);
  fd = open(cFileName, O_RDWR);
  status = read(fd, cContent, sizeof(cContent)-1);
  close(fd);
  
  printf("Content-Type:text/html ");
  printf("<meta http-equiv=refresh content=0;url="http://129.158.217.223/temp/%s"> ", cTempName);
  printf("Waiting....................... ");
  printf("%s", keyword);
  return 0;
  }

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