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HttpRequest [FEATURE]: Add byte range request-header field (patch included) [message #46206]

Sat, 26 March 2016 09:27

omari
Messages: 266
Registered: March 2010

Experienced Member

useful to continue an interrupted download, or to get a file header only

for example, to continue an interrupted download :

	HttpRequest r(url);
	FileAppend fa(localFile);
	fa << r.Range(fa.GetSize()).Execute();

the patch:

1- add a memeber variable :

	String range;

2- initialize this memeber in HttpRequest::Init() :

	range = "";

3- in HttpRequest::StartRequest(), add the content of 'range' to 'data' after the line (<< "Host: " << host_port << "\r\n") :

		data << "URL: " << url << "\r\n"
		     << "Host: " << host_port << "\r\n"
		     << range
		     << "Connection: " << (keep_alive ? "keep-alive\r\n" : "close\r\n")
		     <<...

4- in HttpRequest::StartConnect() , add the content of 'range' to 'data' after the line (<< "Host: " << host_port << "\r\n")

		data << "CONNECT " << host_port << " HTTP/1.1\r\n"
		     << "Host: " << host_port << "\r\n"
		     << range;

5- add HttpRequest::Range() methode :

	HttpRequest&  Range(const int64 from, const int64 to)
	{
		range << "Range: bytes=" << from << "-" << to << "\r\n";
		return *this;
	}

	HttpRequest&  Range(const int64 from)
	{
		range << "Range: bytes=" << from << "-" << "\r\n";
		return *this;
	}

regards
omari.

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