/*
这个示例是一个使用了Dlib C++ 库的server组件的HTTP扩展
它创建一个始终以简单的HTML表单为响应的服务器。
要查看这个页面，你应该访问 http://localhost:5000
*/
#include <iostream>
#include <sstream>
#include <string>
#include <dlib/server.h>
using namespace dlib;
using namespace std;
class web_server : public server_http
{
const std::string on_request (
const incoming_things& incoming,
outgoing_things& outgoing
)
{
ostringstream sout;
// 我们将发回一个包含HTML表单的页面，其中包含两个文本输入字段。一个字段是name(还有一个是pass)
// HTML表单使用post方法，也可以使用get方法(只需将method='post'改为method='get').
sout <<" <html><meta charset=\"utf-8\"><body> "
<< "<form action='/form_handler' method='post'> "
<< "用户名称: <input name='user' type='text'><br> "
<< "用户密码: <input name='pass' type='text'> <input type='submit'> "
<< " </form>";
// 回写这个请求传入的一些信息，以便它们显示在生成的网页上
sout << "<br> path = " << incoming.path << endl;
sout << "<br> request_type = " << incoming.request_type << endl;
sout << "<br> content_type = " << incoming.content_type << endl;
sout << "<br> protocol = " << incoming.protocol << endl;
sout << "<br> foreign_ip = " << incoming.foreign_ip << endl;
sout << "<br> foreign_port = " << incoming.foreign_port << endl;
sout << "<br> local_ip = " << incoming.local_ip << endl;
sout << "<br> local_port = " << incoming.local_port << endl;
sout << "<br> body = \"" << incoming.body << "\"" << endl;
// 如果此请求是用户提交表单的结果，则回显提交
if (incoming.path == "/form_handler")
{
sout << "<h2> 来自 query string 的信息 </h2>" << endl;
sout << "<br> user = " << incoming.queries["user"] << endl;
sout << "<br> pass = " << incoming.queries["pass"] << endl;
// 将这些表单提交作为Cookie保存
outgoing.cookies["user"] = incoming.queries["user"];
outgoing.cookies["pass"] = incoming.queries["pass"];
}
// 将所有Cookie回传到客户端浏览器
sout << "<h2>客户web浏览器发送给服务器的 Cookies</h2>";
for ( key_value_map::const_iterator ci = incoming.cookies.begin(); ci != incoming.cookies.end(); ++ci )
{
sout << "<br/>" << ci->first << " = " << ci->second << endl;
}
sout << "<br/><br/>";
sout << "<h2>客户web浏览器发送给服务器的 HTTP Headers</h2>";
// 回显从客户端web浏览器接收的所有HTTP headers
for ( key_value_map_ci::const_iterator ci = incoming.headers.begin(); ci != incoming.headers.end(); ++ci )
{
sout << "<br/>" << ci->first << ": " << ci->second << endl;
}
sout << "</body> </html>";
return sout.str();
}
};
int main()
{
try
{
// 创建一个 web server 实例对象
web_server our_web_server;
// 监听5000端口
our_web_server.set_listening_port(5000);
// 告诉服务器开始接受连接。
our_web_server.start_async();
cout << "请按Enter(回车)键去结束程序" << endl;
cin.get();
}
catch (exception& e)
{
// 上面出错会抛出异常
// 输出异常消息
cout << e.what() << endl;
}
}
