如何存储http响应并发送到浏览器？ [英] How to store the http response and send to browser?

问题描述

我正在做有关代理服务器的练习。
在代理服务器中缓存时遇到一些问题。
服务器将响应发送给代理并将代理转发给客户端时，将使用以下源代码。没关系。

I'm doing an exercise about Proxy Server. I have some problems when caching in Proxy Server. The following source code is used when the server sends a response to proxy and proxy forward it to the client. It's fine.

//that code is ok
fstream File;
while (P->isClientClose == FALSE && P->isServerClose == FALSE){
    memset(Data, 0, 1024);
    int length = recv(*(P->SERVER), Data, sizeof(Data), 0);
    if (length <= 0)
        break;
    length = send(*(P->CLIENT), Data, length, 0);
    if (length <= 0)
        break;
}

但是当我尝试将HTTP响应写入文件然后读取所有字符时从文件发送到客户端，我有问题。
浏览器说：ERR_CONTENT_DECODING_FAILED

But when I try to write HTTP response to a file and then read all characters from file to send to the client, I have a problem. browser said: ERR_CONTENT_DECODING_FAILED

我正在测试代理缓存的工作方式，但我不知道哪里出错了。
即使我创建了一个字符串Temp（Data），并使用send（*（P-> CLIENT），Temp.c_str（），length，0），客户端仍然会说该错误。
请帮助我。 ：D

I'm testing how does proxy cache work, but I can't understand where is error. Even when i create a string Temp(Data), and use send(*(P->CLIENT), Temp.c_str(), length, 0), client still said that error. Please help me. :D

//that code is error
fstream File;
while (P->isClientClose == FALSE && P->isServerClose == FALSE){
    memset(Data, 0, 1024);
    int length = recv(*(P->SERVER), Data, sizeof(Data), 0);
    if (length <= 0)
        break;

    File.open("test.dat", ios::out|ios::binary);
    File << Data;
    File.close();
    File.open("test.dat", ios::in|ios::ate|ios::binary);
    ifstream::pos_type pos = File.tellg();
    int size = pos;
    cout << "size: " << size << endl;
    char *pChars = new char[size+1]{};
    File.seekg(0, ios::beg);
    File.read(pChars, size);
    File.close();   
    length = send(*(P->CLIENT), pChars, length, 0);
    delete[]pChars;
    if (length <= 0)
        break;
}

推荐答案

还有一些问题。

更新：看来您已经对通讯进行了排序，所以我删除了运球。

Update: It looks like you have the communications sorted, so I removed that dribble.

但是我认为您的问题所在：
文件<<数据；

But I think your issue is in the line: File << Data;

VTT通过指出File<<数据未将指针数据的全部内容写入文件。 <<操作员不知道要写入的数据长度。另外，<<运算符具有char *重载。请参阅： http://www.cplusplus.com/reference/ostream / ostream / operator％3C％3C /

VTT is correct by pointing out that File << Data doesn't write the full contents of our pointer Data into the file. The << operator doesn't know the length of the data you want to write. Also, it doesn't appear that the << operator has a char * overload. See: http://www.cplusplus.com/reference/ostream/ostream/operator%3C%3C/

我假设数据是一个char *。

I assume Data is a char * .

代替文件<<数据，尝试：

Instead of File << Data, try:

 File.write( Data, length);    

然后读回并写给客户端...。

And then read it back and write it to the client....

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