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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 | /*! FileSaver.js * A saveAs() FileSaver implementation. * 2014-01-24 * * By Eli Grey, http://eligrey.com * License: X11/MIT * See 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 // IE 10+ (native saveAs) || (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator)) // Everyone else || (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 BlobBuilder.js hasn't overridden it yet , get_URL = function() { return view.URL || view.webkitURL || view; } , URL = view.URL || view.webkitURL || view , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a") , can_use_save_link = !view.externalHost && "download" in save_link , click = function(node) { var event = doc.createEvent("MouseEvents"); event.initMouseEvent( "click", true, false, view, 0, 0, 0, 0, 0 , false, false, false, false, 0, null ); node.dispatchEvent(event); } , 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 , deletion_queue = [] , process_deletion_queue = function() { var i = deletion_queue.length; while (i--) { var file = deletion_queue[i]; if (typeof file === "string") { // file is an object URL URL.revokeObjectURL(file); } else { // file is a File file.remove(); } } deletion_queue.length = 0; // clear queue } , 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); } } } } , FileSaver = function(blob, name) { // First try a.download, then web filesystem, then object URLs var filesaver = this , type = blob.type , blob_changed = false , object_url , target_view , get_object_url = function() { var object_url = get_URL().createObjectURL(blob); deletion_queue.push(object_url); return object_url; } , dispatch_all = function() { dispatch(filesaver, "writestart progress write writeend".split(" ")); } // on any filesys errors revert to saving with object URLs , fs_error = function() { // don't create more object URLs than needed if (blob_changed || !object_url) { object_url = get_object_url(blob); } if (target_view) { target_view.location.href = object_url; } else { window.open(object_url, "_blank"); } filesaver.readyState = filesaver.DONE; dispatch_all(); } , 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_object_url(blob); // FF for Android has a nasty garbage collection mechanism // that turns all objects that are not pure javascript into 'deadObject' // this means `doc` and `save_link` are unusable and need to be recreated // `view` is usable though: doc = view.document; save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a"); save_link.href = object_url; save_link.download = name; var event = doc.createEvent("MouseEvents"); event.initMouseEvent( "click", true, false, view, 0, 0, 0, 0, 0 , false, false, false, false, 0, null ); save_link.dispatchEvent(event); filesaver.readyState = filesaver.DONE; dispatch_all(); 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 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(); deletion_queue.push(file); filesaver.readyState = filesaver.DONE; dispatch(filesaver, "writeend", event); }; 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) { return new FileSaver(blob, name); } ; 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; view.addEventListener("unload", process_deletion_queue, false); saveAs.unload = function() { process_deletion_queue(); view.removeEventListener("unload", process_deletion_queue, false); }; 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 = saveAs; |