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