ircd::http: Add string views to make the raw head data available.

include/ircd/http.h

@@ -88,6 +88,8 @@ struct ircd::http::line::request
 	string_view fragment;
 	string_view version;
 
+	operator string_view() const;      // full view of line
+
 	request(const line &);
 	request() = default;
 };
@@ -226,6 +228,9 @@ struct ircd::http::request::head
 	string_view uri;       // full view of (path, query, fragmet)
 	string_view headers;   // full view of all headers
 
+	// full view of all head (request line and headers)
+	operator string_view() const;
+
 	head(parse::capstan &pc, const headers::closure &c = {});
 	head() = default;
 };

ircd/http.cc

@@ -307,6 +307,24 @@ ircd::http::request::head::head(parse::capstan &pc,
 {
 }
 
+ircd::http::request::head::operator
+string_view()
+const
+{
+	const string_view request_line
+	{
+		static_cast<const line::request &>(*this)
+	};
+
+	if(request_line.empty() || headers.empty())
+		return request_line;
+
+	return string_view
+	{
+		request_line.begin(), headers.end()
+	};
+}
+
 ircd::http::response::response(window_buffer &out,
                                const code &code,
                                const size_t &content_length,
@@ -639,6 +657,21 @@ catch(const qi::expectation_failure<const char *> &e)
 	throw_error(e);
 }
 
+ircd::http::line::request::operator
+string_view()
+const
+{
+	if(method.empty())
+		return string_view{};
+
+	assert(!version.empty());
+	assert(method.begin() < version.end());
+	return string_view
+	{
+		method.begin(), version.end()
+	};
+}
+
 ircd::http::line::line(parse::capstan &pc)
 :string_view{[&pc]
 {