implement FormData.get and FormData.getAll

lib/form_data.js

@@ -15,6 +15,33 @@ module.exports = FormData;
 // make it a Stream
 util.inherits(FormData, CombinedStream);
 
+/**
+ * @param {string} name the entry name
+ * @param {string} value the entry value
+ * @returns {Object}
+ */
+function createEntry(name, value/*, filename*/) {
+  // TODO: handle Blob and File
+  // Related to https://xhr.spec.whatwg.org/#concept-formdata-entry
+
+  // Case 1:
+  // If value is a Blob object and not a File object, then set value to a new
+  // File object, representing the same bytes, whose name attribute value is
+  // "blob".
+
+  // Case 2:
+  // If value is (now) a File object and filename is given, then set value to a
+  // new File object, representing the same bytes, whose name attribute value
+  // is filename.
+
+  var entry = {
+    name: name,
+    value: value,
+  };
+
+  return entry;
+}
+
 /**
  * Create readable "multipart/form-data" streams.
  * Can be used to submit forms
@@ -31,6 +58,7 @@ function FormData(options) {
   this._overheadLength = 0;
   this._valueLength = 0;
   this._valuesToMeasure = [];
+  this._entryList = [];
 
   CombinedStream.call(this);
 
@@ -76,6 +104,31 @@ FormData.prototype.append = function(field, value, options) {
 
   // pass along options.knownLength
   this._trackLength(header, value, options);
+
+  this._entryList.push(createEntry(field, value));
+};
+
+FormData.prototype.get = function(field) {
+  var foundItem = this._entryList.find(function(item) {
+    return item.name === field;
+  });
+
+  return foundItem ? foundItem.value : null;
+};
+
+FormData.prototype.getAll = function(field) {
+  return this._entryList
+    .reduce(
+      function(acc, entry) {
+        if (entry.name === field) {
+          acc.push(entry.value);
+        }
+
+        return acc;
+      },
+      []
+    )
+  ;
 };
 
 FormData.prototype._trackLength = function(header, value, options) {

test/integration/test-form-get-all.js

@@ -0,0 +1,33 @@
+var common = require('../common');
+var assert = common.assert;
+var FormData = require(common.dir.lib + '/form_data');
+
+(function testEmptyForm() {
+  var form = new FormData();
+
+  // Make sure our response is async
+  assert.strictEqual(form.get('foo'), null);
+  assert.deepEqual(form.getAll('foo'), []);
+})();
+
+(function testWithOneValue() {
+  var form = new FormData();
+
+  form.append('foo', 'bar');
+
+  // Make sure our response is async
+  assert.strictEqual(form.get('foo'), 'bar');
+  assert.deepEqual(form.getAll('foo'), ['bar']);
+})();
+
+(function testWithMultipleValue() {
+  var form = new FormData();
+
+  form.append('foo', 'bar');
+  form.append('foo', 'baz');
+  form.append('foo', 'bad');
+
+  // Make sure our response is async
+  assert.strictEqual(form.get('foo'), 'bar');
+  assert.deepEqual(form.getAll('foo'), ['bar', 'baz', 'bad']);
+})();