CGI头声明格式:Context-Type与Content-

发布时间：2020-07-13 13:50:19 作者：虎皮喵的喵
来源：网络阅读：7825

同样是POST模式下,开头声明的printf格式Context-Type与Content-Type却有很大不同.

Context-Type: printf("Context-Type:text/html;charset=UTF-8\n\n"); -----网页不识别html格式语言,都原样输出在网页上.如果cgi里面没有html格式语言,只是做其他处理,对结果没有影响.

Content-Type: printf("Content-Type:text/html;charset=UTF-8\n\n"); ----网页会识别html语言

CGI头声明格式:Context-Type与Content-

代码如下:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "sqlite3.h"

#define SQL_SELECT "select name, devid, devname from userinfo where username='sume';"

struct __userinfo{
   char name[20];
   char dearname[20];
   char telephone[12];
   char address[200];
   char devid[26];
   char devname[20];
}user;

int main(void)
{
   //声明网页格式
   //printf("Content-Type:text/html;charset=UTF-8\n\n");
   printf("Context-Type:text/html;charset=UTF-8\n\n");

   //获取网页响应
   int len = atoi(getenv("CONTENT_LENGTH"));
   char buf[100]={0};
   int ret = fread(buf, 1, 256, stdin);

   //打开SQL
   sqlite3 *ppdb = NULL;
   ret = sqlite3_open("/mnt/hgfs/Share/program3/userinformation.db", &ppdb);
   if(ret != SQLITE_OK)
   {
       printf("<p>SQLITE OPEN FAIL\n\n");
       return -1;
   }
   char *err = NULL;
   char **result = NULL;


   //显示本人设备信息内容
   int row = 0, col = 0;
   result = NULL;
   ret = sqlite3_get_table(ppdb, SQL_SELECT, &result, &row, &col, &err);
   if(ret != SQLITE_OK)
   {
       printf("SEE FAIL : %s\n", err);
       sqlite3_close(ppdb);
       printf("<body>\n\n");
       printf("<meta http-equiv=\"content-Type\"content=\"text/html;charset=UTF-8\">\n\n");
       printf("<h3 style=\"text-align:center\"> 服务器繁忙,请稍后 </h3>\n\n");
       printf("<center><input type=\"button\" value=\"返回\" onclick=\"window.location.href='http://192.168.14.200/M_userface.html'\">\n\n");
       printf("<input type=\"button\" value=\"退出\" onclick=\"window.location.href='http://192.168.14.200/M_login.html'\"></center>\n\n");
       printf("</body>\n\n");

           return -1;
   }


   int i=0, j=0;
   for(i=1; i<(row+1); i++)
   {
       for(j=0; j<col; j++)
       {
           //printf("%s ", result[i*col+j]);
           //存储表格原信息
           switch(j)
           {
               case 0: strcpy(user.name, result[i*col+j]);break;
               case 1: strcpy(user.devid, result[i*col+j]);break;
               case 2: strcpy(user.devname, result[i*col+j]);break;
           }

       }
       //printf("\n\n");
   }

   printf("<br> </br>");
   printf("<br> </br>");
   printf("<br> </br>");
   printf("<br> </br>");
   printf("<center><table border=\"1\" cellpadding=\"10\" cellspacing=\"0\"></center>");
   printf("<tr>");
   printf("   <th>姓名</th>");
   printf("   <th>设备名称</th>");
   printf("   <th>设备ID</th>");
   printf("</tr>");
   printf("<tr>");
   printf("   <td>%s</td>", user.name);
   printf("   <td>%s</td>", user.devname);
   printf("   <td>%s</td>", user.devid);
   printf("</tr>");
   printf("</table>");

   //释放查询结果空间
   sqlite3_free_table(result);

   //关闭SQL
   sqlite3_close(ppdb);

   //按键选择跳转其他页面
   printf("<body>");
   printf("<meta http-equiv=\"content-Type\"content=\"text/html;charset=UTF-8\">\n\n");
   printf("<center><table border=\"0\" cellpadding=\"10\" cellspacing=\"0\"></center>");
   printf("<tr>");
   printf("<td><input type=\"button\" value=\"返回\" onclick=\"window.location.href='http://192.168.14.200/M_userface.html'\"></td>");
   printf("<td><input type=\"button\" value=\"退出\" onclick=\"window.location.href='http://192.168.14.200/M_login.html'\"></td>");
   printf("</tr>");
   printf("</table>");
   printf("</body>");

   return 0;
}

CGI头声明格式:Context-Type与Content-

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