Add base64 endpoint

Author: gaul

README.md

@@ -30,6 +30,7 @@ Java httpbin supports a subset of httpbin endpoints:
 - `/stream-bytes/:n?chunkSize=c&seed=s` Streams _n_ bytes.
 - `/delay/:n` Delays responding for _min(n, 10)_ seconds.
 - `/bytes/:n` Generates _n_ random bytes of binary data, accepts optional _seed_ integer parameter.
+- `/base64/:s` Returns a base64 decoded :s input
 - `/cookies` Returns the cookies.
 - `/cookies/set?name=value` Sets one or more simple cookies.
 - `/cookies/delete?name` Deletes one or more simple cookies.

src/main/java/org/gaul/httpbin/HttpBinHandler.java

@@ -556,6 +556,15 @@ baos, new Deflater(Deflater.DEFAULT_COMPRESSION,
                 }
                 baseRequest.setHandled(true);
                 return;
+            } else if (method.equals("GET") && uri.startsWith("/base64/")) {
+                Utils.copy(is, Utils.NULL_OUTPUT_STREAM);
+                byte[] body = Base64.decodeBase64(
+                        uri.substring("/base64/".length()));
+                servletResponse.setStatus(HttpServletResponse.SC_OK);
+                os.write(body);
+                os.flush();
+                baseRequest.setHandled(true);
+                return;
             } else if (method.equals("GET") && uri.equals("/image/jpeg")) {
                 Utils.copy(is, Utils.NULL_OUTPUT_STREAM);
                 servletResponse.setStatus(HttpServletResponse.SC_OK);