partkeepr

FileSaver.js (8586B)

---

 /* FileSaver.js
  * A saveAs() FileSaver implementation.
  * 1.1.20151003
  *
  * By Eli Grey, http://eligrey.com
  * License: X11/MIT
  *   See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
  */
 
 /*global self */
 /*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */
 
 /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
 
 var saveAs = saveAs || (function(view) {
 	"use strict";
 	// IE <10 is explicitly unsupported
 	if (typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) {
 		return;
 	}
 	var
 		  doc = view.document
 		  // only get URL when necessary in case Blob.js hasn't overridden it yet
 		, get_URL = function() {
 			return view.URL || view.webkitURL || view;
 		}
 		, save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
 		, can_use_save_link = "download" in save_link
 		, click = function(node) {
 			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) {
 			(view.setImmediate || view.setTimeout)(function() {
 				throw ex;
 			}, 0);
 		}
 		, force_saveable_type = "application/octet-stream"
 		, fs_min_size = 0
 		// See https://code.google.com/p/chromium/issues/detail?id=375297#c7 and
 		// https://github.com/eligrey/FileSaver.js/commit/485930a#commitcomment-8768047
 		// for the reasoning behind the timeout and revocation flow
 		, arbitrary_revoke_timeout = 500 // in ms
 		, revoke = function(file) {
 			var revoker = function() {
 				if (typeof file === "string") { // file is an object URL
 					get_URL().revokeObjectURL(file);
 				} else { // file is a File
 					file.remove();
 				}
 			};
 			if (view.chrome) {
 				revoker();
 			} else {
 				setTimeout(revoker, arbitrary_revoke_timeout);
 			}
 		}
 		, dispatch = function(filesaver, event_types, event) {
 			event_types = [].concat(event_types);
 			var i = event_types.length;
 			while (i--) {
 				var listener = filesaver["on" + event_types[i]];
 				if (typeof listener === "function") {
 					try {
 						listener.call(filesaver, event || filesaver);
 					} catch (ex) {
 						throw_outside(ex);
 					}
 				}
 			}
 		}
 		, auto_bom = function(blob) {
 			// prepend BOM for UTF-8 XML and text/* types (including HTML)
 			if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
 				return new Blob(["\ufeff", blob], {type: blob.type});
 			}
 			return blob;
 		}
 		, FileSaver = function(blob, name, no_auto_bom) {
 			if (!no_auto_bom) {
 				blob = auto_bom(blob);
 			}
 			// First try a.download, then web filesystem, then object URLs
 			var
 				  filesaver = this
 				, type = blob.type
 				, blob_changed = false
 				, object_url
 				, target_view
 				, dispatch_all = function() {
 					dispatch(filesaver, "writestart progress write writeend".split(" "));
 				}
 				// 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);
 					}
 					if (target_view) {
 						target_view.location.href = object_url;
 					} else {
 						var new_tab = view.open(object_url, "_blank");
 						if (new_tab == undefined && is_safari) {
 							//Apple do not allow window.open, see http://bit.ly/1kZffRI
 							view.location.href = object_url
 						}
 					}
 					filesaver.readyState = filesaver.DONE;
 					dispatch_all();
 					revoke(object_url);
 				}
 				, abortable = function(func) {
 					return function() {
 						if (filesaver.readyState !== filesaver.DONE) {
 							return func.apply(this, arguments);
 						}
 					};
 				}
 				, create_if_not_found = {create: true, exclusive: false}
 				, slice
 			;
 			filesaver.readyState = filesaver.INIT;
 			if (!name) {
 				name = "download";
 			}
 			if (can_use_save_link) {
 				object_url = get_URL().createObjectURL(blob);
 				save_link.href = object_url;
 				save_link.download = name;
 				setTimeout(function() {
 					click(save_link);
 					dispatch_all();
 					revoke(object_url);
 					filesaver.readyState = filesaver.DONE;
 				});
 				return;
 			}
 			// Object and web filesystem URLs have a problem saving in Google Chrome when
 			// viewed in a tab, so I force save with application/octet-stream
 			// http://code.google.com/p/chromium/issues/detail?id=91158
 			// Update: Google errantly closed 91158, I submitted it again:
 			// https://code.google.com/p/chromium/issues/detail?id=389642
 			if (view.chrome && type && type !== force_saveable_type) {
 				slice = blob.slice || blob.webkitSlice;
 				blob = slice.call(blob, 0, blob.size, force_saveable_type);
 				blob_changed = true;
 			}
 			// Since I can't be sure that the guessed media type will trigger a download
 			// in WebKit, I append .download to the filename.
 			// https://bugs.webkit.org/show_bug.cgi?id=65440
 			if (webkit_req_fs && name !== "download") {
 				name += ".download";
 			}
 			if (type === force_saveable_type || webkit_req_fs) {
 				target_view = view;
 			}
 			if (!req_fs) {
 				fs_error();
 				return;
 			}
 			fs_min_size += blob.size;
 			req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
 				fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
 					var save = function() {
 						dir.getFile(name, create_if_not_found, abortable(function(file) {
 							file.createWriter(abortable(function(writer) {
 								writer.onwriteend = function(event) {
 									target_view.location.href = file.toURL();
 									filesaver.readyState = filesaver.DONE;
 									dispatch(filesaver, "writeend", event);
 									revoke(file);
 								};
 								writer.onerror = function() {
 									var error = writer.error;
 									if (error.code !== error.ABORT_ERR) {
 										fs_error();
 									}
 								};
 								"writestart progress write abort".split(" ").forEach(function(event) {
 									writer["on" + event] = filesaver["on" + event];
 								});
 								writer.write(blob);
 								filesaver.abort = function() {
 									writer.abort();
 									filesaver.readyState = filesaver.DONE;
 								};
 								filesaver.readyState = filesaver.WRITING;
 							}), fs_error);
 						}), fs_error);
 					};
 					dir.getFile(name, {create: false}, abortable(function(file) {
 						// delete file if it already exists
 						file.remove();
 						save();
 					}), abortable(function(ex) {
 						if (ex.code === ex.NOT_FOUND_ERR) {
 							save();
 						} else {
 							fs_error();
 						}
 					}));
 				}), fs_error);
 			}), fs_error);
 		}
 		, FS_proto = FileSaver.prototype
 		, saveAs = function(blob, name, no_auto_bom) {
 			return new FileSaver(blob, name, no_auto_bom);
 		}
 	;
 	// IE 10+ (native saveAs)
 	if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
 		return function(blob, name, no_auto_bom) {
 			if (!no_auto_bom) {
 				blob = auto_bom(blob);
 			}
 			return navigator.msSaveOrOpenBlob(blob, name || "download");
 		};
 	}
 
 	FS_proto.abort = function() {
 		var filesaver = this;
 		filesaver.readyState = filesaver.DONE;
 		dispatch(filesaver, "abort");
 	};
 	FS_proto.readyState = FS_proto.INIT = 0;
 	FS_proto.WRITING = 1;
 	FS_proto.DONE = 2;
 
 	FS_proto.error =
 	FS_proto.onwritestart =
 	FS_proto.onprogress =
 	FS_proto.onwrite =
 	FS_proto.onabort =
 	FS_proto.onerror =
 	FS_proto.onwriteend =
 		null;
 
 	return saveAs;
 }(
 	   typeof self !== "undefined" && self
 	|| typeof window !== "undefined" && window
 	|| this.content
 ));
 // `self` is undefined in Firefox for Android content script context
 // while `this` is nsIContentFrameMessageManager
 // with an attribute `content` that corresponds to the window
 
 if (typeof module !== "undefined" && module.exports) {
   module.exports.saveAs = saveAs;
 } else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) {
   define([], function() {
     return saveAs;
   });
 }