如何在c ++中解析http请求 [英] how to parse http request in c++

问题描述

我想写一个小的c ++ webserver处理GET，POST，HEAD请求。我的问题是我不知道如何解析标头，消息体等。它正在侦听套接字，我甚至可以写出的东西出来到浏览器很好，但我很好奇我应该如何在c ++中这样做。

Afaik标准的GET / POST请求应如下所示：

  GET / index HTTP / 1.1 
 Host：192.168.0.199:80 
 Connection：keep-alive 
接受：* / * 
 User-Agent：Mozilla / 5.0 NT 6.1; WOW64）AppleWebKit / 537.22（KHTML，like Gecko）Chrome / 25.0.1364.97 Safari / 537.22 
 Accept-Encoding：gzip，deflate，sdch 
 Accept-Language：en-US，en; q = 0.8 
 Accept-Charset：ISO-8859-1，utf-8; q = 0.7，*; q = 0.3 
 
这是消息正文
  

所有行以'\r\\\
'结尾。

我只是拆分请求在'\\\
'和修剪它们（如果是如此）？
也是如何处理post数据中的文件？

我想实现的主要是获取一个包含headers key => value对的向量，请求方法，post数据（如在PHP中，如果它存在）和查询字符串（例如/ index）作为字符串或向量由'/'分割。

感谢！

解决方案

在自己做一切之前，我向您介绍 Poco ，但您应阅读 HTTP规范。

如下所示：

  class MyHTTPRequestHandler：public HTTPRequestHandler 
 {
 public：
 virtual void handleRequest（HTTPServerRequest& request，
 HTTPServerResponse& response）{
 // in res object 
} 
}; 
 
类MyRequestHandlerFactory：public HTTPRequestHandlerFactory 
 {
 MyHTTPRequestHandler handler; 
 
 public：
 MyRequestHandlerFactory（）{} 
 HTTPRequestHandler * createRequestHandler（const HTTPServerRequest& request）
 {
 const string method = request.getMethod ; 
 if（method ==get|| method ==post）
 return& handler; 
 return 0; 
} 
}; 
 
 int main（）
 {
 HTTPServerParams params; 
 params.setMaxQueued（100）; 
 params.setMaxThreads（16）; 
 ServerSocket svs（80）; 
 MyRequestHandlerFactory factory; 
 HTTPServer srv（& factory，svs，& params）; 
 srv.start（）; 
 while（true）
 Thread :: sleep（1000）; 
} 
  

I'm trying to write a small c++ webserver which handles GET, POST, HEAD requests. My problem is I don't know how to parse the headers, message body, etc. It's listening on the socket, I can even write stuff out to the browser just fine, but I'm curious how should I do this in c++.

Afaik a standard GET/POST request should look something like this:

GET /index HTTP/1.1
Host: 192.168.0.199:80
Connection: keep-alive
Accept: */*
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.22 (KHTML, like Gecko)     Chrome/25.0.1364.97 Safari/537.22
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

this is the message body

All lines ended with '\r\n'.

Should I just split the request at '\n' and trim them (and if so how)? Also how to handle files in post data?

Main thing I want to achieve is to get a vector containing headers key=>value pairs, a string with request method, the post data (like in PHP, if it's present), and the query string (/index for example) as string or vector splitted by '/'.

Thanks!

解决方案

Before doing everything yourself, I introduce you Poco, However you should read HTTP specification too.

Something like below:

class MyHTTPRequestHandler : public HTTPRequestHandler
{
public:
    virtual void handleRequest(HTTPServerRequest & request,
                               HTTPServerResponse & response) {
        // Write your HTML response in res object
    }
};

class MyRequestHandlerFactory : public HTTPRequestHandlerFactory
{
    MyHTTPRequestHandler handler;

public:
    MyRequestHandlerFactory(){}
    HTTPRequestHandler* createRequestHandler(const HTTPServerRequest& request)
    {
        const string method = request.getMethod();
        if (method == "get" || method == "post")
            return &handler;
        return 0;
    }
};

int main()
{
    HTTPServerParams params;
    params.setMaxQueued(100);
    params.setMaxThreads(16);
    ServerSocket svs(80);
    MyRequestHandlerFactory factory;
    HTTPServer srv(&factory, svs, &params);
    srv.start();
    while (true)
        Thread::sleep(1000);
}

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