feat(File): add keepFileName save option

Author: leeyeh

src/file.js

@@ -496,6 +496,7 @@ module.exports = function(AV) {
         const data = {
           key,
           name,
+          keep_file_name: true,
           ACL: this._acl,
           mime_type: type,
           metaData: this.attributes.metaData,
@@ -512,13 +513,12 @@ module.exports = function(AV) {
        * Saves the file to the AV cloud.
        * @param {AuthOptions} [options] AuthOptions plus:
        * @param {UploadProgressCallback} [options.onprogress] 文件上传进度，在 Node.js 中无效，回调参数说明详见 {@link UploadProgressCallback}。
+       * @param {boolean} [options.keepFileName = false] 保留下载文件的文件名。
        * @return {Promise} Promise that is resolved when the save finishes.
        */
       save(options = {}) {
         if (this.id) {
-          throw new Error(
-            'File already saved. If you want to manipulate a file, use AV.Query to get it.'
-          );
+          throw new Error('File is already saved.');
         }
         if (!this._previousSave) {
           if (this._data) {

src/uploader/qiniu.js

@@ -14,7 +14,7 @@ module.exports = function upload(uploadInfo, data, file, saveOptions = {}) {
       .set(file._uploadHeaders)
       .attach('file', data, file.attributes.name)
       .field('name', file.attributes.name)
-      .field('key', file._qiniu_key)
+      .field('key', uploadInfo.key || file._qiniu_key)
       .field('token', uptoken);
     if (saveOptions.onprogress) {
       req.on('progress', saveOptions.onprogress);

test/file.js

@@ -9,12 +9,27 @@ try {
 
 describe('File', function() {
   describe('Saving base64', function() {
+    var base64 = 'd29ya2luZyBhdCBhdm9zY2xvdWQgaXMgZ3JlYXQh';
+    var fileName = 'base64.txt';
+
     it('should be saved', function() {
-      var base64 = 'd29ya2luZyBhdCBhdm9zY2xvdWQgaXMgZ3JlYXQh';
-      var file = new AV.File('base64.txt', { base64: base64 });
+      var file = new AV.File(fileName, { base64: base64 });
+      file.metaData('format', 'txt file');
+      file.setACL(new AV.ACL());
+      return file.save().then(function() {
+        expect(file.id).to.be.ok();
+        expect(file.metaData('format')).to.be('txt file');
+        expect(file.get('mime_type')).to.be('text/plain');
+        return file.destroy({ useMasterKey: true });
+      });
+    });
+
+    it('with keepFileName', function() {
+      var file = new AV.File(fileName, { base64: base64 });
       file.metaData('format', 'txt file');
       file.setACL(new AV.ACL());
       return file.save().then(function() {
+        expect(file.url()).to.match(new RegExp(fileName + '$'));
         expect(file.ownerId()).to.be.ok();
         expect(file.id).to.be.ok();
         expect(file.metaData('format')).to.be('txt file');
@@ -163,7 +178,7 @@ describe('File', function() {
       var file = AV.File.createWithoutData(fileId);
       expect(function saveFetchedFile() {
         file.save();
-      }).to.throwError(/File already saved\./);
+      }).to.throwError(/File is already saved\./);
     });
     describe('fetch', () => {
       before(function() {