提升asio read_u直到文件的异常结束

我正试图通过boost asio向服务器发送HTTP请求。我在c++中创建了以下请求：

static const std::string TEMPLATE_HEADER =
"POST " + HTTP_PATH + " HTTP/1.1rn"
"Content-Type: application/jsonrn"
"Host: " + HOST_TAG + "rn"
"{ " + TEMPLATE_BODY + " }rnrn";

我发送的实际请求是：

POST /eikon/authsession/machines/ HTTP/1.1 Content-Type: application/json Host: amers1.am.cp.icp2.mpp.ime.reuters.com:80 { "machineID" : "EP-03A482F1B88A","password" : "PasswordReset","takeESOControl" : "false","deviceID" : "123" }

当使用Postman（一个谷歌Chrome扩展）时，这是有效的，但使用boost asio似乎不起作用。我做以下操作（上面的HTTP请求是strTemp.

// Write the request to the buffer
size_t request_length = strTemp.length();
boost::asio::write(s, boost::asio::buffer(strTemp, request_length));
char reply[max_length];
// When a reply is received ending in the correct tag we are looking for, store it in the response buffer
boost::asio::streambuf response;
boost::asio::read_until(s, response, Constants::BRACE_TAG);

其中BRACE_TAG变量="｝"（返回的响应以大括号结尾。

我收到一个异常，上面写着"exception:read_until:End of file"。

有人知道发生了什么事吗？

谢谢。