How do I enable local javascript to read / write files on my PC?
Since Greasemonkey cannot read / write files from the local hard drive, I heard people suggest Google tools, but I have no idea about transfers.
So I decided to add
<script type="text/javascript" src="file:///c:/test.js">/script>
This test will now use FileSystemObject to read / write the file. Since it file:///c:/test.js
is a javascript file from my local hard drive, it should probably be able to read / write the file on my local hard drive.
I tried but Firefox forbade the file:///c:/test.js
script to read / write files from the local disk. :(
Is there any setting in Firefox about:config
where we can tell a specific script from, say, localfile or xyz.com, to have read and write permissions on local disk files?
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You can use them within the chrome area.
var FileManager =
{
Write:
function (File, Text)
{
if (!File) return;
const unicodeConverter = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"]
.createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
unicodeConverter.charset = "UTF-8";
Text = unicodeConverter.ConvertFromUnicode(Text);
const os = Components.classes["@mozilla.org/network/file-output-stream;1"]
.createInstance(Components.interfaces.nsIFileOutputStream);
os.init(File, 0x02 | 0x08 | 0x20, 0700, 0);
os.write(Text, Text.length);
os.close();
},
Read:
function (File)
{
if (!File) return;
var res;
const is = Components.classes["@mozilla.org/network/file-input-stream;1"]
.createInstance(Components.interfaces.nsIFileInputStream);
const sis = Components.classes["@mozilla.org/scriptableinputstream;1"]
.createInstance(Components.interfaces.nsIScriptableInputStream);
is.init(File, 0x01, 0400, null);
sis.init(is);
res = sis.read(sis.available());
is.close();
return res;
},
}
Example:
var x = FileManager.Read("C:\\test.js");
see also
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