filesaver.js 7.4 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233
  1. /* FileSaver.js
  2. * A saveAs() FileSaver implementation.
  3. * 2013-10-21
  4. *
  5. * By Eli Grey, http://eligrey.com
  6. * License: X11/MIT
  7. * See LICENSE.md
  8. */
  9. /*global self */
  10. /*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
  11. plusplus: true */
  12. /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
  13. if(AmCharts.isModern){ /// added by AmCharts to avoid old IE problems if this file is included
  14. var saveAs = saveAs
  15. || (typeof navigator !== 'undefined' && navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))
  16. || (function(view) {
  17. "use strict";
  18. var
  19. doc = view.document
  20. // only get URL when necessary in case BlobBuilder.js hasn't overridden it yet
  21. , get_URL = function() {
  22. return view.URL || view.webkitURL || view;
  23. }
  24. , URL = view.URL || view.webkitURL || view
  25. , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
  26. , can_use_save_link = !view.externalHost && "download" in save_link
  27. , click = function(node) {
  28. var event = doc.createEvent("MouseEvents");
  29. event.initMouseEvent(
  30. "click", true, false, view, 0, 0, 0, 0, 0
  31. , false, false, false, false, 0, null
  32. );
  33. node.dispatchEvent(event);
  34. }
  35. , webkit_req_fs = view.webkitRequestFileSystem
  36. , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
  37. , throw_outside = function (ex) {
  38. (view.setImmediate || view.setTimeout)(function() {
  39. throw ex;
  40. }, 0);
  41. }
  42. , force_saveable_type = "application/octet-stream"
  43. , fs_min_size = 0
  44. , deletion_queue = []
  45. , process_deletion_queue = function() {
  46. var i = deletion_queue.length;
  47. while (i--) {
  48. var file = deletion_queue[i];
  49. if (typeof file === "string") { // file is an object URL
  50. URL.revokeObjectURL(file);
  51. } else { // file is a File
  52. file.remove();
  53. }
  54. }
  55. deletion_queue.length = 0; // clear queue
  56. }
  57. , dispatch = function(filesaver, event_types, event) {
  58. event_types = [].concat(event_types);
  59. var i = event_types.length;
  60. while (i--) {
  61. var listener = filesaver["on" + event_types[i]];
  62. if (typeof listener === "function") {
  63. try {
  64. listener.call(filesaver, event || filesaver);
  65. } catch (ex) {
  66. throw_outside(ex);
  67. }
  68. }
  69. }
  70. }
  71. , FileSaver = function(blob, name) {
  72. // First try a.download, then web filesystem, then object URLs
  73. var
  74. filesaver = this
  75. , type = blob.type
  76. , blob_changed = false
  77. , object_url
  78. , target_view
  79. , get_object_url = function() {
  80. var object_url = get_URL().createObjectURL(blob);
  81. deletion_queue.push(object_url);
  82. return object_url;
  83. }
  84. , dispatch_all = function() {
  85. dispatch(filesaver, "writestart progress write writeend".split(" "));
  86. }
  87. // on any filesys errors revert to saving with object URLs
  88. , fs_error = function() {
  89. // don't create more object URLs than needed
  90. if (blob_changed || !object_url) {
  91. object_url = get_object_url(blob);
  92. }
  93. if (target_view) {
  94. target_view.location.href = object_url;
  95. } else {
  96. window.open(object_url, "_blank");
  97. }
  98. filesaver.readyState = filesaver.DONE;
  99. dispatch_all();
  100. }
  101. , abortable = function(func) {
  102. return function() {
  103. if (filesaver.readyState !== filesaver.DONE) {
  104. return func.apply(this, arguments);
  105. }
  106. };
  107. }
  108. , create_if_not_found = {create: true, exclusive: false}
  109. , slice
  110. ;
  111. filesaver.readyState = filesaver.INIT;
  112. if (!name) {
  113. name = "download";
  114. }
  115. if (can_use_save_link) {
  116. object_url = get_object_url(blob);
  117. // FF for Android has a nasty garbage collection mechanism
  118. // that turns all objects that are not pure javascript into 'deadObject'
  119. // this means `doc` and `save_link` are unusable and need to be recreated
  120. // `view` is usable though:
  121. doc = view.document;
  122. save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a");
  123. save_link.href = object_url;
  124. save_link.download = name;
  125. var event = doc.createEvent("MouseEvents");
  126. event.initMouseEvent(
  127. "click", true, false, view, 0, 0, 0, 0, 0
  128. , false, false, false, false, 0, null
  129. );
  130. save_link.dispatchEvent(event);
  131. filesaver.readyState = filesaver.DONE;
  132. dispatch_all();
  133. return;
  134. }
  135. // Object and web filesystem URLs have a problem saving in Google Chrome when
  136. // viewed in a tab, so I force save with application/octet-stream
  137. // http://code.google.com/p/chromium/issues/detail?id=91158
  138. if (view.chrome && type && type !== force_saveable_type) {
  139. slice = blob.slice || blob.webkitSlice;
  140. blob = slice.call(blob, 0, blob.size, force_saveable_type);
  141. blob_changed = true;
  142. }
  143. // Since I can't be sure that the guessed media type will trigger a download
  144. // in WebKit, I append .download to the filename.
  145. // https://bugs.webkit.org/show_bug.cgi?id=65440
  146. if (webkit_req_fs && name !== "download") {
  147. name += ".download";
  148. }
  149. if (type === force_saveable_type || webkit_req_fs) {
  150. target_view = view;
  151. }
  152. if (!req_fs) {
  153. fs_error();
  154. return;
  155. }
  156. fs_min_size += blob.size;
  157. req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
  158. fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
  159. var save = function() {
  160. dir.getFile(name, create_if_not_found, abortable(function(file) {
  161. file.createWriter(abortable(function(writer) {
  162. writer.onwriteend = function(event) {
  163. target_view.location.href = file.toURL();
  164. deletion_queue.push(file);
  165. filesaver.readyState = filesaver.DONE;
  166. dispatch(filesaver, "writeend", event);
  167. };
  168. writer.onerror = function() {
  169. var error = writer.error;
  170. if (error.code !== error.ABORT_ERR) {
  171. fs_error();
  172. }
  173. };
  174. "writestart progress write abort".split(" ").forEach(function(event) {
  175. writer["on" + event] = filesaver["on" + event];
  176. });
  177. writer.write(blob);
  178. filesaver.abort = function() {
  179. writer.abort();
  180. filesaver.readyState = filesaver.DONE;
  181. };
  182. filesaver.readyState = filesaver.WRITING;
  183. }), fs_error);
  184. }), fs_error);
  185. };
  186. dir.getFile(name, {create: false}, abortable(function(file) {
  187. // delete file if it already exists
  188. file.remove();
  189. save();
  190. }), abortable(function(ex) {
  191. if (ex.code === ex.NOT_FOUND_ERR) {
  192. save();
  193. } else {
  194. fs_error();
  195. }
  196. }));
  197. }), fs_error);
  198. }), fs_error);
  199. }
  200. , FS_proto = FileSaver.prototype
  201. , saveAs = function(blob, name) {
  202. return new FileSaver(blob, name);
  203. }
  204. ;
  205. FS_proto.abort = function() {
  206. var filesaver = this;
  207. filesaver.readyState = filesaver.DONE;
  208. dispatch(filesaver, "abort");
  209. };
  210. FS_proto.readyState = FS_proto.INIT = 0;
  211. FS_proto.WRITING = 1;
  212. FS_proto.DONE = 2;
  213. FS_proto.error =
  214. FS_proto.onwritestart =
  215. FS_proto.onprogress =
  216. FS_proto.onwrite =
  217. FS_proto.onabort =
  218. FS_proto.onerror =
  219. FS_proto.onwriteend =
  220. null;
  221. view.addEventListener("unload", process_deletion_queue, false);
  222. return saveAs;
  223. }(this.self || this.window || this.content));
  224. // `self` is undefined in Firefox for Android content script context
  225. // while `this` is nsIContentFrameMessageManager
  226. // with an attribute `content` that corresponds to the window
  227. if (typeof module !== 'undefined') module.exports = saveAs;
  228. }/// added by AmCharts to avoid old IE problems if this file is included