web(六)---fastcgi再进阶(请求和响应)

接上节, 上节只有响应---cout,  本节获取地址栏的QUERY_STRING, 然后响应.

 

一. req_resp.cpp.

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "fcgio.h"

#include "fcgi_config.h"



using namespace std;



int main (void)

{

    int count = 0;

    long pid = getpid();



    streambuf * cin_streambuf  = cin.rdbuf();

    streambuf * cout_streambuf = cout.rdbuf();

    streambuf * cerr_streambuf = cerr.rdbuf();



    FCGX_Request request;



    FCGX_Init();

    FCGX_InitRequest(&request, 0, 0);



    while (FCGX_Accept_r(&request) == 0)

    {

        fcgi_streambuf cin_fcgi_streambuf(request.in);

        fcgi_streambuf cout_fcgi_streambuf(request.out);

        fcgi_streambuf cerr_fcgi_streambuf(request.err);



        cin.rdbuf(&cin_fcgi_streambuf);

        cout.rdbuf(&cout_fcgi_streambuf);

        cerr.rdbuf(&cerr_fcgi_streambuf);



        cout << "Content-type: text/html\r\n"

                "\r\n"

                "<H4>PID: " << pid << "</H4>\n"

                "<H4>Request Number: " << ++count << "</H4>\n";



        cout << "<H4>Request Environment</H4>\n";

        for(int i = 0; request.envp[i]; ++i)

        {

            char* findQueryStr = NULL;

            findQueryStr = strstr(request.envp[i], "QUERY_STRING");

            if (findQueryStr)

            {

                cout << request.envp[i] << '\n';

            }

        }

    }



    cin.rdbuf(cin_streambuf);

    cout.rdbuf(cout_streambuf);

    cerr.rdbuf(cerr_streambuf);



    return 0;

}

 

 

二. 编译运行.

#g++ -o req_resp req_resp.cpp -I /usr/local/include -L /usr/local/lib -lfcgi -lstdc++ -lfcgi++

#./req_resp

若编译或运行时出错(一般是库问题), 参考上几节解决办法.

 

三. 将cgi拷贝到ngix(目标路径没有则手动创建)

cp ***/req_resp  /usr/local/nginx/cgibin

 

四. 启动Spawn-fcgi.

/usr/local/nginx/sbin/spawn-fcgi -a 127.0.0.1 -p 8088 -f /usr/local/nginx/cgibin/req_resp

 

五. 访问.

注:　python index.py已经运行的情况下.

浏览器地址栏:    localhost/req_resp.cgi?his_is_from_brower_input&hello=1&world=2

 

注意显示的QUERY_STRING就是地址栏问号后的内容.

浏览器显示为:

PID: 4072

Request Number: 2

Request Environment

QUERY_STRING=this_is_from_brower_input&hello=1&world=2