LocalFile Prototype
Syntax
var object = new LocalFile(file, mode, perms, tmp);
Arguments
| Argument | Summary |
|---|---|
| file | |
| mode | |
| perms | |
| tmp |
Remarks
Members
| Member | Summary |
|---|---|
| close | |
| flush | |
| read | Will return an empty string if there is data, but it couldn't be read. |
| write |
See Also
Source Code
function LocalFile(file, mode, perms, tmp)
{
const classes = Components.classes;
const interfaces = Components.interfaces;
const LOCALFILE_CTRID = "@mozilla.org/file/local;1";
const FILEIN_CTRID = "@mozilla.org/network/file-input-stream;1";
const FILEOUT_CTRID = "@mozilla.org/network/file-output-stream;1";
const SCRIPTSTREAM_CTRID = "@mozilla.org/scriptableinputstream;1";
const nsIFile = interfaces.nsIFile;
const nsILocalFile = interfaces.nsILocalFile;
const nsIFileOutputStream = interfaces.nsIFileOutputStream;
const nsIFileInputStream = interfaces.nsIFileInputStream;
const nsIScriptableInputStream = interfaces.nsIScriptableInputStream;
if (typeof perms == "undefined")
perms = 0666 & ~futils.umask;
if (typeof mode == "string")
{
switch (mode)
{
case ">":
mode = MODE_WRONLY | MODE_CREATE | MODE_TRUNCATE;
break;
case ">>":
mode = MODE_WRONLY | MODE_CREATE | MODE_APPEND;
break;
case "<":
mode = MODE_RDONLY;
break;
default:
throw "Invalid mode ``" + mode + "''";
}
}
if (typeof file == "string")
{
this.localFile = new nsLocalFile(file);
}
else if (isinstance(file, nsILocalFile))
{
this.localFile = file;
}
else
{
throw "bad type for argument |file|.";
}
this.path = this.localFile.path;
if (mode & (MODE_WRONLY | MODE_RDWR))
{
this.outputStream =
classes[FILEOUT_CTRID].createInstance(nsIFileOutputStream);
this.outputStream.init(this.localFile, mode, perms, 0);
}
if (mode & (MODE_RDONLY | MODE_RDWR))
{
this.baseInputStream =
classes[FILEIN_CTRID].createInstance(nsIFileInputStream);
this.baseInputStream.init(this.localFile, mode, perms, tmp);
this.inputStream =
classes[SCRIPTSTREAM_CTRID].createInstance(nsIScriptableInputStream);
this.inputStream.init(this.baseInputStream);
}
}