ProtocolServer+LibProtocol: Introduce a server for handling downloads

This patch adds ProtocolServer, a server that handles network requests
on behalf of its clients. The first protocol implemented is HTTP.

The idea here is to use a plug-in architecture where any number of
protocols can be added and implemented without having to mess around
with each client program that wants to use the protocol.

A simple client API is provided through LibProtocol::Client. :^)

1 files changed, 23 insertions, 0 deletions

diff --git a/Servers/ProtocolServer/Protocol.cpp b/Servers/ProtocolServer/Protocol.cpp
new file mode 100644
index 0000000000..7d29458eb5
--- /dev/null
+++ b/Servers/ProtocolServer/Protocol.cpp
@@ -0,0 +1,23 @@
+#include <AK/HashMap.h>
+#include <ProtocolServer/Protocol.h>
+
+static HashMap<String, Protocol*>& all_protocols()
+{
+    static HashMap<String, Protocol*> map;
+    return map;
+}
+
+Protocol* Protocol::find_by_name(const String& name)
+{
+    return all_protocols().get(name).value_or(nullptr);
+}
+
+Protocol::Protocol(const String& name)
+{
+    all_protocols().set(name, this);
+}
+
+Protocol::~Protocol()
+{
+    ASSERT_NOT_REACHED();
+}