Forming a HTTP response with strings - c++

Question

I am working on a HTTP server with boost, and I have some questions about forming the HTTP response, particularly the header.
Here's the code to assemble the GET response :
std::string h = statusCodes[200]; // The status code is already finished with a '\r\n'
std::string t = "Date: " + daytime_() + "\r\n";
std::string s = "Server: Muffin 1.0\r\n";
std::string content = search->second();
std::string type = "Content-Type: text/html\r\n";
std::string length = "Content-Length: " + std::to_string(content.size()) + "\r\n";
res = h + t + s + length + type + "\r\n" + content + "\r\n";
As they say on this website, here's the header spec :
The format of the request and response messages are similar, and
English-oriented. Both kinds of messages consist of:
an initial line, zero or more header lines,
a blank line (i.e. a CRLF by itself),
and an optional message body (e.g. a file, or query data, or query output).
But when I do a request on the server, only the date goes in the header, the rest is directly in the content
HTTP/1.1 200 OK // Header
Date: Tue May 24 10:28:58 2016 // Header
Server: Muffin 1.0 // Content
Content-Length: 31
Content-Type: text/html
This is supposed to be an ID
I don't know what's wrong in that, it's the first time I'm dealing with HTTP response.
Thanks for your help

Answer 1

I finally found the bug.
My daytime function was returning a string with a newline character.
This was the original function, which uses the depreciated ctime
std::string
Response::daytime_()
{
std::time_t now = std::time(0);
return std::ctime(&now);
}
And now the new function with strftime
std::string
Response::daytime_()
{
time_t rawtime;
struct tm * timeinfo;
char buffer[80];
time (&rawtime);
timeinfo = localtime(&rawtime);
strftime(buffer,80,"%a %b %d %H:%M:%S %Y",timeinfo);
std::string time(buffer);
return time;
}
And the new way to form the responses, using just a '\n'
std::string res = "";
std::string h = statusCodes[200];
std::string t = "Date: " + daytime_() + "\r\n";
std::string s = "Server: Muffin 1.0\r\n";
std::string content = search->second();
std::string type = "Content-Type: text/html\r\n";
std::string length = "Content-Length: " + std::to_string(content.size()) + "\r\n";
res = h + t + s + length + type + "\n" + content + "\r\n";