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| 1 | +/* FileSaver.js |
| 2 | + * A saveAs() FileSaver implementation. |
| 3 | + * 1.3.2 |
| 4 | + * 2016-06-16 18:25:19 |
| 5 | + * |
| 6 | + * By Eli Grey, http://eligrey.com |
| 7 | + * License: MIT |
| 8 | + * See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md |
| 9 | + */ |
| 10 | + |
| 11 | +/*global self */ |
| 12 | +/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */ |
| 13 | + |
| 14 | +/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */ |
| 15 | + |
| 16 | +var saveAs = saveAs || (function(view) { |
| 17 | + "use strict"; |
| 18 | + // IE <10 is explicitly unsupported |
| 19 | + if (typeof view === "undefined" || typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) { |
| 20 | + return; |
| 21 | + } |
| 22 | + var |
| 23 | + doc = view.document |
| 24 | + // only get URL when necessary in case Blob.js hasn't overridden it yet |
| 25 | + , get_URL = function() { |
| 26 | + return view.URL || view.webkitURL || view; |
| 27 | + } |
| 28 | + , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a") |
| 29 | + , can_use_save_link = "download" in save_link |
| 30 | + , click = function(node) { |
| 31 | + var event = new MouseEvent("click"); |
| 32 | + node.dispatchEvent(event); |
| 33 | + } |
| 34 | + , is_safari = /constructor/i.test(view.HTMLElement) || view.safari |
| 35 | + , is_chrome_ios =/CriOS\/[\d]+/.test(navigator.userAgent) |
| 36 | + , throw_outside = function(ex) { |
| 37 | + (view.setImmediate || view.setTimeout)(function() { |
| 38 | + throw ex; |
| 39 | + }, 0); |
| 40 | + } |
| 41 | + , force_saveable_type = "application/octet-stream" |
| 42 | + // the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to |
| 43 | + , arbitrary_revoke_timeout = 1000 * 40 // in ms |
| 44 | + , revoke = function(file) { |
| 45 | + var revoker = function() { |
| 46 | + if (typeof file === "string") { // file is an object URL |
| 47 | + get_URL().revokeObjectURL(file); |
| 48 | + } else { // file is a File |
| 49 | + file.remove(); |
| 50 | + } |
| 51 | + }; |
| 52 | + setTimeout(revoker, arbitrary_revoke_timeout); |
| 53 | + } |
| 54 | + , dispatch = function(filesaver, event_types, event) { |
| 55 | + event_types = [].concat(event_types); |
| 56 | + var i = event_types.length; |
| 57 | + while (i--) { |
| 58 | + var listener = filesaver["on" + event_types[i]]; |
| 59 | + if (typeof listener === "function") { |
| 60 | + try { |
| 61 | + listener.call(filesaver, event || filesaver); |
| 62 | + } catch (ex) { |
| 63 | + throw_outside(ex); |
| 64 | + } |
| 65 | + } |
| 66 | + } |
| 67 | + } |
| 68 | + , auto_bom = function(blob) { |
| 69 | + // prepend BOM for UTF-8 XML and text/* types (including HTML) |
| 70 | + // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF |
| 71 | + if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) { |
| 72 | + return new Blob([String.fromCharCode(0xFEFF), blob], {type: blob.type}); |
| 73 | + } |
| 74 | + return blob; |
| 75 | + } |
| 76 | + , FileSaver = function(blob, name, no_auto_bom) { |
| 77 | + if (!no_auto_bom) { |
| 78 | + blob = auto_bom(blob); |
| 79 | + } |
| 80 | + // First try a.download, then web filesystem, then object URLs |
| 81 | + var |
| 82 | + filesaver = this |
| 83 | + , type = blob.type |
| 84 | + , force = type === force_saveable_type |
| 85 | + , object_url |
| 86 | + , dispatch_all = function() { |
| 87 | + dispatch(filesaver, "writestart progress write writeend".split(" ")); |
| 88 | + } |
| 89 | + // on any filesys errors revert to saving with object URLs |
| 90 | + , fs_error = function() { |
| 91 | + if ((is_chrome_ios || (force && is_safari)) && view.FileReader) { |
| 92 | + // Safari doesn't allow downloading of blob urls |
| 93 | + var reader = new FileReader(); |
| 94 | + reader.onloadend = function() { |
| 95 | + var url = is_chrome_ios ? reader.result : reader.result.replace(/^data:[^;]*;/, 'data:attachment/file;'); |
| 96 | + var popup = view.open(url, '_blank'); |
| 97 | + if(!popup) view.location.href = url; |
| 98 | + url=undefined; // release reference before dispatching |
| 99 | + filesaver.readyState = filesaver.DONE; |
| 100 | + dispatch_all(); |
| 101 | + }; |
| 102 | + reader.readAsDataURL(blob); |
| 103 | + filesaver.readyState = filesaver.INIT; |
| 104 | + return; |
| 105 | + } |
| 106 | + // don't create more object URLs than needed |
| 107 | + if (!object_url) { |
| 108 | + object_url = get_URL().createObjectURL(blob); |
| 109 | + } |
| 110 | + if (force) { |
| 111 | + view.location.href = object_url; |
| 112 | + } else { |
| 113 | + var opened = view.open(object_url, "_blank"); |
| 114 | + if (!opened) { |
| 115 | + // Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html |
| 116 | + view.location.href = object_url; |
| 117 | + } |
| 118 | + } |
| 119 | + filesaver.readyState = filesaver.DONE; |
| 120 | + dispatch_all(); |
| 121 | + revoke(object_url); |
| 122 | + } |
| 123 | + ; |
| 124 | + filesaver.readyState = filesaver.INIT; |
| 125 | + |
| 126 | + if (can_use_save_link) { |
| 127 | + object_url = get_URL().createObjectURL(blob); |
| 128 | + setTimeout(function() { |
| 129 | + save_link.href = object_url; |
| 130 | + save_link.download = name; |
| 131 | + click(save_link); |
| 132 | + dispatch_all(); |
| 133 | + revoke(object_url); |
| 134 | + filesaver.readyState = filesaver.DONE; |
| 135 | + }); |
| 136 | + return; |
| 137 | + } |
| 138 | + |
| 139 | + fs_error(); |
| 140 | + } |
| 141 | + , FS_proto = FileSaver.prototype |
| 142 | + , saveAs = function(blob, name, no_auto_bom) { |
| 143 | + return new FileSaver(blob, name || blob.name || "download", no_auto_bom); |
| 144 | + } |
| 145 | + ; |
| 146 | + // IE 10+ (native saveAs) |
| 147 | + if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) { |
| 148 | + return function(blob, name, no_auto_bom) { |
| 149 | + name = name || blob.name || "download"; |
| 150 | + |
| 151 | + if (!no_auto_bom) { |
| 152 | + blob = auto_bom(blob); |
| 153 | + } |
| 154 | + return navigator.msSaveOrOpenBlob(blob, name); |
| 155 | + }; |
| 156 | + } |
| 157 | + |
| 158 | + FS_proto.abort = function(){}; |
| 159 | + FS_proto.readyState = FS_proto.INIT = 0; |
| 160 | + FS_proto.WRITING = 1; |
| 161 | + FS_proto.DONE = 2; |
| 162 | + |
| 163 | + FS_proto.error = |
| 164 | + FS_proto.onwritestart = |
| 165 | + FS_proto.onprogress = |
| 166 | + FS_proto.onwrite = |
| 167 | + FS_proto.onabort = |
| 168 | + FS_proto.onerror = |
| 169 | + FS_proto.onwriteend = |
| 170 | + null; |
| 171 | + |
| 172 | + return saveAs; |
| 173 | +}( |
| 174 | + typeof self !== "undefined" && self |
| 175 | + || typeof window !== "undefined" && window |
| 176 | + || this.content |
| 177 | +)); |
| 178 | +// `self` is undefined in Firefox for Android content script context |
| 179 | +// while `this` is nsIContentFrameMessageManager |
| 180 | +// with an attribute `content` that corresponds to the window |
| 181 | + |
| 182 | +if (typeof module !== "undefined" && module.exports) { |
| 183 | + module.exports.saveAs = saveAs; |
| 184 | +} else if ((typeof define !== "undefined" && define !== null) && (define.amd !== null)) { |
| 185 | + define("FileSaver.js", function() { |
| 186 | + return saveAs; |
| 187 | + }); |
| 188 | +} |
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