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File node: recreate write stream when file deleted

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Fixes #1351
This commit is contained in:
Nick O'Leary
2017-07-22 22:28:45 +01:00
parent f0373cd789
commit 2aced893c6
2 changed files with 146 additions and 10 deletions
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45
nodes/core/storage/50-file.js
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@@ -72,14 +72,53 @@ module.exports = function(RED) {
node.wstream.end(node.data.shift());
}
else {
if ((!node.wstream) || (!node.filename)) {
// Append mode
var recreateStream = !node.wstream || !node.filename;
if (node.wstream && node.wstreamIno) {
// There is already a stream open and we have the inode
// of the file. Check the file hasn't been deleted
// or deleted and recreated.
try {
var stat = fs.statSync(filename);
// File exists - check the inode matches
if (stat.ino !== node.wstreamIno) {
// The file has been recreated. Close the current
// stream and recreate it
recreateStream = true;
node.wstream.end();
delete node.wstream;
delete node.wstreamIno;
}
} catch(err) {
// File does not exist
recreateStream = true;
node.wstream.end();
delete node.wstream;
delete node.wstreamIno;
}
}
if (recreateStream) {
node.wstream = fs.createWriteStream(filename, { encoding:'binary', flags:'a', autoClose:true });
node.wstream.on("open", function(fd) {
try {
var stat = fs.statSync(filename);
node.wstreamIno = stat.ino;
} catch(err) {
}
});
node.wstream.on("error", function(err) {
node.error(RED._("file.errors.appendfail",{error:err.toString()}),msg);
});
}
if (node.filename) { node.wstream.write(node.data.shift()); }
else { node.wstream.end(node.data.shift()); }
if (node.filename) {
// Static filename - write and reuse the stream next time
node.wstream.write(node.data.shift());
} else {
// Dynamic filename - write and close the stream
node.wstream.end(node.data.shift());
delete node.wstream;
delete node.wstreamIno;
}
}
}
}