Initial WebFinger

- Add headers to PRequest

source/webfinger.d

@@ -0,0 +1,51 @@
+module webfinger;
+
+import std.algorithm;
+import std.array;
+import std.format;
+import std.json;
+import std.typecons;
+
+import requests;
+
+import net.request_pool;
+import singletons;
+
+enum AcceptedWebfingerContentType = "application/jrd+json, application/json";
+
+private bool checkValidWebfingerResponse(Response rs) {
+
+  return AcceptedWebfingerContentType.canFind(rs.responseHeaders()["content-type"].split(";")[0]);
+}
+
+PRequest buildRequest(string uri, string[string] params) {
+  PRequest rq = PRequest();
+
+  rq.method = "GET";
+  rq.url = format("http://%s/.well-known/webfinger", uri);
+  rq.headers["Accept"] = AcceptedWebfingerContentType;
+
+  QueryParam[] p;
+
+  foreach (k, v; params)
+    p ~= tuple!("key", "value")(k, v);
+
+  rq.params = p;
+
+  return rq;
+}
+
+PRequest buildAcctRequest(string uri, string acct) {
+  string[string] params = ["resource": format("acct:%s@%s", acct, uri)];
+
+  return buildRequest(uri, params);
+}
+
+JSONValue requestAcct(string uri, string acct) {
+  Response rs = RP.request(buildAcctRequest(uri, acct), true);
+
+  if (checkValidWebfingerResponse(rs) == false)
+    throw new Exception("Invalid webfinger response");
+
+  return parseJSON(rs.responseBody().toString());
+}