talksik/FileSaver.js
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Merge pull request #233 from eligrey/remove_filesystem

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Removed filesystem and support saving with file name
This commit is contained in:
Jimmy Karl Roland Wärting
2016-05-31 09:12:32 +02:00
parent b610731175 1bb6b90443
commit ae387dbbac
1 changed files with 17 additions and 114 deletions
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FileSaver.js
+17 -114
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@@ -30,16 +30,13 @@ 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
, is_safari = /constructor/i.test(view.HTMLElement)
, throw_outside = function(ex) {
(view.setImmediate || view.setTimeout)(function() {
throw ex;
}, 0);
}
, force_saveable_type = "application/octet-stream"
, fs_min_size = 0
// the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to
, arbitrary_revoke_timeout = 1000 * 40 // in ms
, revoke = function(file) {
@@ -50,22 +47,6 @@ var saveAs = saveAs || (function(view) {
file.remove();
}
};
/* // Take note W3C:
var
uri = typeof file === "string" ? file : file.toURL()
, revoker = function(evt) {
// idealy DownloadFinishedEvent.data would be the URL requested
if (evt.data === uri) {
if (typeof file === "string") { // file is an object URL
get_URL().revokeObjectURL(file);
} else { // file is a File
file.remove();
}
}
}
;
view.addEventListener("downloadfinished", revoker);
*/
setTimeout(revoker, arbitrary_revoke_timeout);
}
, dispatch = function(filesaver, event_types, event) {
@@ -98,20 +79,19 @@ var saveAs = saveAs || (function(view) {
var
filesaver = this
, type = blob.type
, blob_changed = false
, force = type === force_saveable_type
, 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") {
if (force && is_safari && view.FileReader) {
// 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(/[,;]/));
view.location.href = "data:attachment/file" + base64Data.slice(base64Data.search(/[,;]/));
filesaver.readyState = filesaver.DONE;
dispatch_all();
};
@@ -120,14 +100,14 @@ var saveAs = saveAs || (function(view) {
return;
}
// don't create more object URLs than needed
if (blob_changed || !object_url) {
if (!object_url) {
object_url = get_URL().createObjectURL(blob);
}
if (target_view) {
target_view.location.href = object_url;
if (force) {
view.location.href = object_url;
} else {
var new_tab = view.open(object_url, "_blank");
if (new_tab === undefined && is_safari) {
var opened = view.open(object_url, "_blank");
if (!opened) {
// Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html
view.location.href = object_url;
}
@@ -136,20 +116,9 @@ var saveAs = saveAs || (function(view) {
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);
setTimeout(function() {
@@ -162,93 +131,27 @@ var saveAs = saveAs || (function(view) {
});
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_error();
}
, FS_proto = FileSaver.prototype
, saveAs = function(blob, name, no_auto_bom) {
return new FileSaver(blob, name, no_auto_bom);
return new FileSaver(blob, name || blob.name || "download", no_auto_bom);
}
;
// IE 10+ (native saveAs)
if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
return function(blob, name, no_auto_bom) {
name = name || blob.name || "download";
if (!no_auto_bom) {
blob = auto_bom(blob);
}
return navigator.msSaveOrOpenBlob(blob, name || "download");
return navigator.msSaveOrOpenBlob(blob, name);
};
}
FS_proto.abort = function() {
var filesaver = this;
filesaver.readyState = filesaver.DONE;
dispatch(filesaver, "abort");
};
FS_proto.abort = function(){};
FS_proto.readyState = FS_proto.INIT = 0;
FS_proto.WRITING = 1;
FS_proto.DONE = 2;