I tried the code blow for downloading file from a Rest API with boost asio, the consequence was it look like just had a small portions of file in the body of response , I had no idea what wrong I have done,Boost is latest version within VS2013 on a Win7 machine
boost::asio::io_service io_service;
// Get a list of endpoints corresponding to the server name.
boost::asio::ip::tcp::resolver resolver(io_service);
boost::asio::ip::tcp::resolver::query query(host, port);
boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
// Try each endpoint until we successfully establish a connection.
boost::asio::ip::tcp::socket socket(io_service);
boost::asio::connect(socket, endpoint_iterator);
// Form the request. We specify the "Connection: close" header so that the
// server will close the socket after transmitting the response. This will
// allow us to treat all data up until the EOF as the content.
boost::asio::streambuf request;
std::ostream request_stream(&request);
request_stream << "POST " << target << " HTTP/1.1\r\n";
request_stream << "Host: " << host << "\r\n";
request_stream << "Accept: " << acceptwstr << "\r\n";
request_stream << "Content-Type: " << ContentTypewstr << "\r\n";
request_stream << "Content-Length: " << jsondata.length() << "\r\n";
request_stream << "x-tif-paasid: " << accessKey << "\r\n";
request_stream << "x-tif-timestamp: " << msecondstr << "\r\n";
request_stream << "x-tif-nonce: " << uuidstr << "\r\n";
request_stream << "x-tif-signature: " << signature << "\r\n";
request_stream << "Connection: Close\r\n\r\n";
request_stream << jsondata << "\r\n";
// Send the request.
boost::asio::write(socket, request);
// Read the response status line. The response streambuf will automatically
// grow to accommodate the entire line. The growth may be limited by passing
// a maximum size to the streambuf constructor.
boost::asio::streambuf response;
boost::asio::read_until(socket, response, "\r\n");
// Check that response is OK.
std::istream response_stream(&response);
std::string http_version;
response_stream >> http_version;
unsigned int status_code;
response_stream >> status_code;
std::string status_message;
std::getline(response_stream, status_message);
if (!response_stream || http_version.substr(0, 5) != "HTTP/")
{
//std::cout << "Invalid response\n";
return 9002;
}
if (status_code != 200)
{
//std::cout << "Response returned with status code " << status_code << "\n";
return 9003;
}
// Read the response headers, which are terminated by a blank line.
boost::asio::read_until(socket, response, "\r\n\r\n");
// Process the response headers.
std::string header;
std::string fullHeader = "";
while (std::getline(response_stream, header) && header != "\r")
fullHeader.append(header).append("\n");
// Write whatever content we already have to output.
std::string fullResponse = "";
if (response.size() > 0)
{
std::stringstream ss;
ss << &response;
fullResponse = ss.str();
}
// Read until EOF, writing data to output as we go.
std::string fullSth = "";
boost::system::error_code error;
while (boost::asio::read(socket, response,
boost::asio::transfer_at_least(1), error))
{
std::ostringstream ss;
ss << &response;
fullSth = ss.str();
}
if (error != boost::asio::error::eof)
throw boost::system::system_error(error);
}
catch (std::exception& e)
{
write_text_to_log_file(e.what());
return 9001;
}
the value of fullHeader was
x-proxy-by: Tif-APIGate
Set-Cookie: XSRF-TOKEN=ebcf70d2-8b00-46b9-a8f9-6dcbbc535ee9; Path=/
Content-Disposition: attachment; filename="202012303333629003180526491.txt.zip"
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
Content-Type: application/octet-stream;charset=UTF-8
Transfer-Encoding: chunked
Date: Tue, 23 Mar 2021 02:34:38 GMT
connection: Close
x-tif-nonce: kmlen6de-122075580
the value of fullResponse was
2a4
PK
