Merge pull request eligrey#175 from antelle/safari-octet-stream-fix

Workaround for downloading application/octet-stream in Safari

Author: eligrey

FileSaver.js

@@ -30,6 +30,7 @@ var saveAs = saveAs || (function(view) {
 			var event = new MouseEvent("click");
 			node.dispatchEvent(event);
 		}
+		, is_safari = /Version\/[\d\.]+.*Safari/.test(navigator.userAgent)
 		, webkit_req_fs = view.webkitRequestFileSystem
 		, req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
 		, throw_outside = function(ex) {
@@ -94,6 +95,19 @@ var saveAs = saveAs || (function(view) {
 				}
 				// on any filesys errors revert to saving with object URLs
 				, fs_error = function() {
+					if (target_view && is_safari && typeof FileReader !== "undefined") {
+						// Safari doesn't allow downloading of blob urls
+						var reader = new FileReader();
+						reader.onloadend = function() {
+							var base64Data = reader.result;
+							target_view.location.href = "data:attachment/file" + base64Data.slice(base64Data.search(/[,;]/));
+							filesaver.readyState = filesaver.DONE;
+							dispatch_all();
+						};
+						reader.readAsDataURL(blob);
+						filesaver.readyState = filesaver.INIT;
+						return;
+					}
 					// don't create more object URLs than needed
 					if (blob_changed || !object_url) {
 						object_url = get_URL().createObjectURL(blob);
@@ -102,7 +116,7 @@ var saveAs = saveAs || (function(view) {
 						target_view.location.href = object_url;
 					} else {
 						var new_tab = view.open(object_url, "_blank");
-						if (new_tab == undefined && typeof safari !== "undefined") {
+						if (new_tab == undefined && is_safari) {
 							//Apple do not allow window.open, see http://bit.ly/1kZffRI
 							view.location.href = object_url
 						}

FileSaver.min.js

@@ -100,7 +100,7 @@ Contributing
 The `FileSaver.js` distribution file is compiled with Uglify.js like so:
 
 ```bash
-uglifyjs FileSaver.js --comments /@source/ > FileSaver.min.js
+uglifyjs FileSaver.js --mangle --comments /@source/ > FileSaver.min.js
 ```
 
 Please make sure you build a production version before submitting a pull request.