some fixes

Author: Mikhail Koltunov

lib/FileAPI.XHR.js

@@ -158,7 +158,7 @@
 if ( options._chunked ) {
 // chunked upload
 if( xhr.upload ){
-xhr.upload.addEventListener('progress', function (/**Event*/evt){
+xhr.upload.addEventListener('progress', api.throttle(function (/**Event*/evt){
 if (!data.retry) {
  // show progress only for correct chunk uploads
 options.progress({
@@ -168,7 +168,7 @@
 , totalSize:data.size
 }, _this, options);
 }
-}, false);
+}, 100), false);
 }
 
 xhr.onreadystatechange = function (){
@@ -204,6 +204,9 @@
 data.end = lkb;
 } else {
 data.end = data.start - 1;
+ if (416 == xhr.status) {
+ data.end = data.end - options.chunkSize;
+ }
 }
 
 setTimeout(function () {
@@ -237,6 +240,9 @@
 }
 }
 xhr = null;
+ if (slice) {
+ slice = null;
+ }
 }
 };
 
@@ -246,13 +252,20 @@
 var slice;
 (slice = 'slice') in data.file || (slice = 'mozSlice') in data.file || (slice = 'webkitSlice') in data.file;
 
-xhr.setRequestHeader("Content-Range", "bytes " + data.start + "-" + data.end + "/" + data.size);
-xhr.setRequestHeader("Content-Disposition", 'attachment; filename=' + encodeURIComponent(data.name));
-xhr.setRequestHeader("Content-Type", data.type || "application/octet-stream");
- 
-slice = data.file[slice](data.start, data.end + 1);
- 
-xhr.send(slice);
+ slice = data.file[slice](data.start, data.end + 1);
+
+ if (data.size && !slice.size) {
+ setTimeout(function () {
+ _this.end(-1);
+ })
+ } else {
+ xhr.setRequestHeader("Content-Range", "bytes " + data.start + "-" + data.end + "/" + data.size);
+ xhr.setRequestHeader("Content-Disposition", 'attachment; filename=' + encodeURIComponent(data.name));
+ xhr.setRequestHeader("Content-Type", data.type || "application/octet-stream");
+
+ xhr.send(slice);
+ }
+
 slice = null;
 } else {
 // single piece upload