add microhttpd server

libs/http_server/pihttpserver.cpp

@@ -0,0 +1,50 @@
+#include "pihttpserver.h"
+
+#include "piliterals_string.h"
+
+
+PIHTTPServer::PIHTTPServer() {
+	setRequestCallback([this](const MicrohttpdServer::Request & r) -> MicrohttpdServer::Reply {
+		MicrohttpdServer::Reply rep;
+		rep.setCode(404);
+		auto in_path = r.path.split("/");
+		in_path.removeAll("");
+		auto it = functions.makeReverseIterator();
+		while (it.next()) {
+			if (it.value().function) {
+				if (it.value().match(in_path)) {
+					rep.setCode(200);
+					rep = it.value().function(r);
+					break;
+				}
+			}
+		}
+		auto hit = reply_headers.makeIterator();
+		while (hit.next())
+			rep.addHeader(hit.key(), hit.value());
+		return rep;
+	});
+}
+
+
+PIHTTPServer::~PIHTTPServer() {
+	stop();
+}
+
+
+void PIHTTPServer::registerPath(const PIString & path, RequestFunction functor) {
+	auto & ep(functions[path]);
+	ep.path     = path.split("/");
+	ep.function = functor;
+	ep.path.removeAll("");
+}
+
+
+bool PIHTTPServer::Endpoint::match(const PIStringList & in_path) const {
+	if (in_path.size() != path.size()) return false;
+	for (int i = 0; i < path.size_s(); ++i) {
+		if (path[i] == "*"_a) continue;
+		if (path[i] != in_path[i]) return false;
+	}
+	return true;
+}