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Components.utils.import('resource://gre/modules/NetUtil.jsm');
Components.utils.import('resource://greasemonkey/constants.js');
const EXPORTED_SYMBOLS = ['writeToFile'];
const NORMAL_FILE_TYPE = Components.interfaces.nsIFile.NORMAL_FILE_TYPE;
// PR_WRONLY PR_CREATE_FILE PR_TRUNCATE
const STREAM_FLAGS = 0x02 | 0x08 | 0x20;
const converter = Components
.classes["@mozilla.org/intl/scriptableunicodeconverter"]
.createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
converter.charset = "UTF-8";
/** Given string data and an nsIFile, write it safely to that file. */
function writeToFile(aData, aFile, aCallback) {
// Assume aData is a string; convert it to a UTF-8 stream.
var istream = converter.convertToInputStream(aData);
// Create a temporary file (stream) to hold the data.
var tmpFile = aFile.clone();
tmpFile.createUnique(NORMAL_FILE_TYPE, GM_constants.fileMask);
var ostream = Components
.classes["@mozilla.org/network/safe-file-output-stream;1"]
.createInstance(Components.interfaces.nsIFileOutputStream);
ostream.init(tmpFile, STREAM_FLAGS, GM_constants.fileMask, 0);
NetUtil.asyncCopy(istream, ostream, function(status) {
if (Components.isSuccessCode(status)) {
// On successful write, move it to the real location.
tmpFile.moveTo(aFile.parent, aFile.leafName);
if (aCallback) aCallback();
}
});
}
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