Add support for sending 'raw' requests on Android

request.data can be `Uint8Array` or `ArrayBuffer`. The plugin will send it as is, without any processing.

src/android/com/silkimen/cordovahttp/CordovaHttpBase.java

@@ -159,6 +159,8 @@ abstract class CordovaHttpBase implements Runnable {
       request.send(this.data.toString());
     } else if ("utf8".equals(this.serializer)) {
       request.send(((JSONObject) this.data).getString("text"));
+    } else if ("raw".equals(this.serializer)) {
+      request.send(Base64.decode((String)this.data, Base64.DEFAULT));
     } else if ("urlencoded".equals(this.serializer)) {
       request.form(JsonUtils.getObjectMap((JSONObject) this.data));
     } else if ("multipart".equals(this.serializer)) {

www/helpers.js

@@ -1,5 +1,5 @@
 module.exports = function init(global, jsUtil, cookieHandler, messages, base64, errorCodes, dependencyValidator, ponyfills) {
-  var validSerializers = ['urlencoded', 'json', 'utf8', 'multipart'];
+  var validSerializers = ['urlencoded', 'json', 'utf8', 'raw', 'multipart'];
   var validCertModes = ['default', 'nocheck', 'pinned', 'legacy'];
   var validClientAuthModes = ['none', 'systemstore', 'buffer'];
   var validHttpMethods = ['get', 'put', 'post', 'patch', 'head', 'delete', 'upload', 'download'];
@@ -365,6 +365,8 @@ module.exports = function init(global, jsUtil, cookieHandler, messages, base64,
         return ['Object'];
       case 'json':
         return ['Array', 'Object'];
+      case 'raw':
+        return ['Uint8Array', 'ArrayBuffer'];
       default:
         return [];
     }
@@ -400,6 +402,8 @@ module.exports = function init(global, jsUtil, cookieHandler, messages, base64,
     switch (dataSerializer) {
       case 'utf8':
         return cb({ text: data });
+      case 'raw':
+        return cb(currentDataType === 'Uint8Array' ? data.buffer : data);
       case 'multipart':
         return processFormData(data, cb);
       default:

www/js-util.js

@@ -6,6 +6,8 @@ module.exports = {
         return 'Array';
       case '[object Blob]':
         return 'Blob';
+      case '[object Uint8Array]':
+        return 'Uint8Array';
       case '[object ArrayBuffer]':
         return 'ArrayBuffer';
       case '[object Boolean]':