我正在使用Poco来模拟一个AXIS相机Web服务器,该服务器在客户端请求时发送JPEG帧。
每个Web响应都应使用Content-Type:multipart / x-mixed-replace和预定义的边界进行编码。
我该如何使用Poco完成这个任务? 谢谢。
我正在使用Poco来模拟一个AXIS相机Web服务器,该服务器在客户端请求时发送JPEG帧。
每个Web响应都应使用Content-Type:multipart / x-mixed-replace和预定义的边界进行编码。
我该如何使用Poco完成这个任务? 谢谢。
重要的是将 setChunkedTransferEncoding() 指定为 false,以避免分块传输,这不是我所要求的。
我需要的是这个:
http://www.w3.org/Protocols/rfc1341/7_2_Multipart.html
如果这是我的数据缓冲区:“这是第一个边界块。边界块可以在下一个块中继续。这是第二个边界块。”
这就是我需要实现的内容:
HTTP/1.1 200 OK
Date: Tue, 01 Dec 2013 10:27:30 GMT
Content-Length: 117
Content-Type: Multipart/mixed; boundary="sample_boundary";
--sample_boundary
This is the first boundary block. A boundary block may
--sample_boundary
continue in the next block. This is the second boundary block.
std::ostream& ostr = response.send();
char frameBuffer[102410];
char fragment[1024];
string boundary = "--BOUNDARY--";
response.setChunkedTransferEncoding(false);
response.setContentType("multipart/x-mixed-replace; boundary=" + boundary);
//Split my frameBuffer in some fragments with boundary
unsigned int nBytes = sizeof(frameBuffer);
unsigned int _MAX_FRAGMENT_SIZE_ = sizeof(fragment);
unsigned int index=0;
response.setContentLength(frameLength);
while (nBytes>0){
unsigned int size = (nBytes>_MAX_FRAGMENT_SIZE_)?_MAX_FRAGMENT_SIZE_:nBytes;
memcpy(fragment, frameBuffer + index, size);
//Enviamos el fragmento sin mas con su boundary correspondiente.
ostr << boundary << "\r\n";
ostr.write(fragment, size);
ostr << "\r\n";
index += size;
nBytes -= size;
}
我认为Poco有解决这个问题的工具。 谢谢
应该是这样的:
using Poco::Net::HTTPRequestHandler;
using Poco::Net::HTTPServerRequest;
using Poco::Net::HTTPServerResponse;
using Poco::Net::HTTPRequestHandlerFactory;
using Poco::Net::HTTPServerParams;
using Poco::Net::HTTPServer;
using Poco::Net::ServerSocket;
using Poco::Net::SocketAddress;
struct AXISRequestHandler: public HTTPRequestHandler
{
void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response)
{
// ... get data to send back
response.setContentType("multipart/x-mixed-replace; boundary=--MY_BOUND");
response.sendBuffer(data, size);
}
};
struct AXISRequestHandlerFactory: public HTTPRequestHandlerFactory
{
HTTPRequestHandler* createRequestHandler(const HTTPServerRequest& request)
{
return new AXISRequestHandler;
}
};
ServerSocket svs(SocketAddress("192.168.0.1", 8080));
HTTPServerParams* pParams = new HTTPServerParams;
// ... set server params here to your liking
HTTPServer srv(new AXISRequestHandlerFactory, svs, pParams);
srv.start(); // NB: server will fly off here (to its own thread)