Merge pull request #416 from ryanseys/fix-storage-range

Accept 0 for start and end of storage range requests

lib/storage/file.js

@@ -235,9 +235,10 @@ File.prototype.copy = function(destination, callback) {
  *     with less reliability. You may also choose to skip validation completely,
  *     however this is **not recommended**.
  * @param {number} options.start - A byte offset to begin the file's download
- *     from. NOTE: Byte ranges are inclusive; that is, `options.start = 0` and
- *     `options.end = 999` represent the first 1000 bytes in a file or object.
- *     NOTE: when specifying a byte range, data integrity is not available.
+ *     from. Default is 0. NOTE: Byte ranges are inclusive; that is,
+ *     `options.start = 0` and `options.end = 999` represent the first 1000
+ *     bytes in a file or object. NOTE: when specifying a byte range, data
+ *     integrity is not available.
  * @param {number} options.end - A byte offset to stop reading the file at.
  *     NOTE: Byte ranges are inclusive; that is, `options.start = 0` and
  *     `options.end = 999` represent the first 1000 bytes in a file or object.
@@ -325,8 +326,10 @@ File.prototype.createReadStream = function(options) {
     };
 
     if (rangeRequest) {
+      var start = util.is(options.start, 'number') ? options.start : '0';
+      var end = util.is(options.end, 'number') ? options.end : '';
       reqOpts.headers = {
-        Range: 'bytes=' + [options.start || '', options.end || ''].join('-')
+        Range: 'bytes=' + start + '-' + end
       };
     }
 

test/storage/file.js

@@ -454,12 +454,12 @@ describe('File', function() {
       file.createReadStream({ start: startOffset });
     });
 
-    it('should accept an end range', function(done) {
+    it('should accept an end range and set start to 0', function(done) {
       var endOffset = 100;
 
       request_Override = function(opts) {
         setImmediate(function () {
-          assert.equal(opts.headers.Range, 'bytes=-' + endOffset);
+          assert.equal(opts.headers.Range, 'bytes=0-' + endOffset);
           done();
         });
         return duplexify();
@@ -485,6 +485,23 @@ describe('File', function() {
       file.metadata = metadata;
       file.createReadStream({ start: startOffset, end: endOffset });
     });
+
+    it('should accept range start and end as 0', function(done) {
+      var startOffset = 0;
+      var endOffset = 0;
+
+      request_Override = function(opts) {
+        setImmediate(function () {
+          var expectedRange = 'bytes=0-0';
+          assert.equal(opts.headers.Range, expectedRange);
+          done();
+        });
+        return duplexify();
+      };
+
+      file.metadata = metadata;
+      file.createReadStream({ start: startOffset, end: endOffset });
+    });
   });
 
   describe('createWriteStream', function() {