ircd::http: Support view of full URI in the request::head; use in X-Matrix auth.

include/ircd/http.h

@@ -286,7 +286,8 @@ struct ircd::http::request::head
 	string_view user_agent;
 	size_t content_length {0};
 
-	string_view headers;
+	string_view uri;       // full view of (path, query, fragmet)
+	string_view headers;   // full view of all headers
 
 	head(parse::capstan &pc, const headers::closure &c = {});
 	head() = default;

ircd/http.cc

@@ -296,6 +296,12 @@ ircd::http::request::request(stream_buffer &out,
 ircd::http::request::head::head(parse::capstan &pc,
                                 const headers::closure &c)
 :line::request{pc}
+,uri
+{
+	fragment? string_view { begin(path), end(fragment) }:
+	query?    string_view { begin(path), end(query)    }:
+	          string_view { begin(path), end(path)     }
+}
 ,headers
 {
 	http::headers{pc, [this, &c](const auto &h)

ircd/resource.cc

@@ -175,14 +175,6 @@ ircd::verify_origin(client &client,
                     resource::request &request)
 try
 {
-	const fmt::bsprintf<1024> uri
-	{
-		"%s%s%s",
-		request.head.path,
-		request.query? "?" : "",
-		request.query
-	};
-
 	const m::request::x_matrix x_matrix
 	{
 		request.head.authorization
@@ -190,7 +182,7 @@ try
 
 	const m::request object
 	{
-		x_matrix.origin, my_host(), method.name, uri, request.content
+		x_matrix.origin, my_host(), method.name, request.head.uri, request.content
 	};
 
 	const auto verified