http-api: add client for looking up feed

http-api/src/main/java/net/runelite/http/api/feed/FeedClient.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2018, Lotto <https://github.com/devLotto>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.http.api.feed;
+
+import com.google.gson.JsonParseException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import net.runelite.http.api.RuneLiteAPI;
+import okhttp3.HttpUrl;
+import okhttp3.Request;
+import okhttp3.Response;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class FeedClient
+{
+	private static final Logger logger = LoggerFactory.getLogger(FeedClient.class);
+
+	public FeedResult lookupFeed() throws IOException
+	{
+		HttpUrl url = RuneLiteAPI.getApiBase().newBuilder()
+			.addPathSegment("feed")
+			.build();
+
+		logger.debug("Built URI: {}", url);
+
+		Request request = new Request.Builder()
+			.url(url)
+			.build();
+
+		try (Response response = RuneLiteAPI.CLIENT.newCall(request).execute())
+		{
+			if (!response.isSuccessful())
+			{
+				logger.debug("Error looking up feed: {}", response.message());
+				return null;
+			}
+
+			InputStream in = response.body().byteStream();
+			return RuneLiteAPI.GSON.fromJson(new InputStreamReader(in), FeedResult.class);
+		}
+		catch (JsonParseException ex)
+		{
+			throw new IOException(ex);
+		}
+	}
+}