WIP: major progress for #101

- feat(www): implement preprocessor for FormData instances
- feat(www): implement API checks for multipart requests
- feat(android): implement multipart requests
- chore(specs): implement www specs for new prprocessor

www/dependency-validator.js

@@ -1,22 +1,43 @@
-module.exports = function init(FormData, console, messages) {
+module.exports = function init(global, console, messages) {
   var interface = {
+    checkBlobApi: checkBlobApi,
+    checkFileReaderApi: checkFileReaderApi,
     checkFormDataApi: checkFormDataApi,
+    checkTextEncoderApi: checkTextEncoderApi,
     logWarnings: logWarnings,
   };
 
   return interface;
 
   function logWarnings() {
-    if (!FormData) {
+    if (!global.FormData) {
       console.warn(messages.MISSING_FORMDATA_API);
-    } else if (!FormData.prototype || !FormData.prototype.entries) {
+    } else if (!global.FormData.prototype || !global.FormData.prototype.entries) {
       console.warn(messages.MISSING_FORMDATA_ENTRIES_API);
     }
   }
 
+  function checkBlobApi() {
+    if (!global.Blob || !global.Blob.prototype) {
+      throw new Error(messages.MISSING_BLOB_API);
+    }
+  }
+
+  function checkFileReaderApi() {
+    if (!global.FileReader || !global.FileReader.prototype) {
+      throw new Error(messages.MISSING_FILE_READER_API);
+    }
+  }
+
   function checkFormDataApi() {
-    if (!FormData || !FormData.prototype || !FormData.prototype.entries) {
+    if (!global.FormData || !global.FormData.prototype || !global.FormData.prototype.entries) {
       throw new Error(messages.MISSING_FORMDATA_ENTRIES_API);
     }
   }
+
+  function checkTextEncoderApi() {
+    if (!global.TextEncoder || !global.TextEncoder.prototype) {
+      throw new Error(messages.MISSING_TEXT_ENCODER_API);
+    }
+  }
 };