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Code Issues Releases Wiki Activity

Add binary mode to tail node

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This commit is contained in:
Dave Conway-Jones 2016-02-24 23:06:27 +00:00
parent ad10125303
commit d3a98dd355
3 changed files with 45 additions and 21 deletions
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9
nodes/core/locales/en-US/messages.json
View File

@ -194,7 +194,7 @@
"h": "Hours"
},
"extend": " extend delay if new message arrives",
"tip": "The node can also be reset by sending a message with the <b>msg.reset</b> property set to any value.",
"tip": "The node can also be reset by sending a message with the <code>msg.reset</code> property set to any value.",
"label": {
"trigger": "trigger",
"trigger-block": "trigger & block",
@ -405,7 +405,7 @@
},
"tip": {
"in": "Tip: Make sure your firewall will allow the data in.",
"out": "Tip: leave address and port blank if you want to set using <b>msg.ip</b> and <b>msg.port</b>.",
"out": "Tip: leave address and port blank if you want to set using <code>msg.ip</code> and <code>msg.port</code>.",
"port": "Ports already in use: "
},
"status": {
@ -637,8 +637,13 @@
"tail": {
"label": {
"filename": "Filename",
"type": "File type",
"splitlines": "Split lines on \\n?"
},
"action": {
"text": "Text - returns String",
"binary": "Binary - returns Buffer"
},
"errors": {
"windowsnotsupport": "Not currently supported on Windows."
}

22
nodes/core/storage/28-tail.html
View File

@ -1,5 +1,5 @@
<!--
Copyright 2013 IBM Corp.
Copyright 2013,2016 IBM Corp.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -15,11 +15,18 @@
-->
<script type="text/x-red" data-template-name="tail">
<div class="form-row node-input-filename">
<div class="form-row">
<label for="node-input-filename"><i class="fa fa-file"></i> <span data-i18n="tail.label.filename"></span></label>
<input type="text" id="node-input-filename">
</div>
<div class="form-row">
<label for="node-input-filetype"><i class="fa fa-file-text-o"></i> <span data-i18n="tail.label.type"></span></label>
<select type="text" id="node-input-filetype">
<option value="text" data-i18n="tail.action.text"></option>
<option value="binary" data-i18n="tail.action.binary"></option>
</select>
</div>
<div class="form-row" id="node-tail-split">
<label>&nbsp;</label>
<input type="checkbox" id="node-input-split" placeholder="Name" style="display: inline-block; width: auto; vertical-align: top;">
<label for="node-input-split" style="width: 70%;"><span data-i18n="tail.label.splitlines"></span></label>
@ -28,12 +35,12 @@
<label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
<input type="text" id="node-input-name" data-i18n="[placeholder]common.label.name">
</div>
<!-- <div class="form-tips">WON'T work on Windows.</div> -->
</script>
<script type="text/x-red" data-help-name="tail">
<p>Tails (watches for things to be added) to the configured file. (Linux/Mac ONLY)</p>
<p>This won't work on Windows filesystems, as it relies on the <b>tail -F</b> command.</p>
<p>This will not work on Windows filesystems, as it relies on the <b>tail -F</b> command.</p>
<p>Text (UTF-8) files will be returned as strings. Binary files will be returned as a Buffer object.</p>
</script>
<script type="text/javascript">
@ -41,6 +48,7 @@
category: 'storage-input',
defaults: {
name: {value:""},
filetype: {value:"text"},
split: {value:false},
filename: {value:"",required:true}
},
@ -53,6 +61,12 @@
},
labelStyle: function() {
return this.name?"node_label_italic":"";
},
oneditprepare: function() {
$("#node-input-filetype").on("change",function() {
if (this.value === "text") { $("#node-tail-split").show(); }
else { $("#node-tail-split").hide(); }
});
}
});
</script>

35
nodes/core/storage/28-tail.js
View File

@ -1,5 +1,5 @@
/**
* Copyright 2013, 2014 IBM Corp.
* Copyright 2013,2016 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -27,6 +27,7 @@ module.exports = function(RED) {
RED.nodes.createNode(this,n);
this.filename = n.filename;
this.filetype = n.filetype || "text";
this.split = n.split;
var node = this;
@ -34,24 +35,28 @@ module.exports = function(RED) {
// TODO: rewrite to use node-tail
var tail = spawn("tail", ["-F", "-n", "0", this.filename]);
tail.stdout.on("data", function (data) {
if (node.split) {
// TODO: allow customisation of the line break - as we do elsewhere
var strings = data.toString().split("\n");
for (var s in strings) {
//TODO: should we really filter blanks? Is that expected?
if (strings[s] !== "") {
node.send({
topic: node.filename,
payload: strings[s]
});
var msg = { topic:node.filename };
if (this.filetype === "text") {
if (node.split) {
// TODO: allow customisation of the line break - as we do elsewhere
var strings = data.toString().split("\n");
for (var s in strings) {
//TODO: should we really filter blanks? Is that expected?
if (strings[s] !== "") {
node.send({
topic: node.filename,
payload: strings[s]
});
}
}
}
else {
msg.payload = data.toString();
node.send(msg);
}
}
else {
var msg = {
topic:node.filename,
payload: data.toString()
};
msg.payload = data;
node.send(msg);
}
});