std::ostringstream contentrange;
contentrange << "Content-Range: bytes " << filestart << "-"
<< filesize - 1 << "/" << filesize;
headers.push_back(contentrange.str());
std::ostringstream contentrange;
contentrange << "Content-Range: bytes " << filestart << "-"
<< filesize - 1 << "/" << filesize;
headers.push_back(contentrange.str());