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node-red-nodes/social/feedparser/32-feedparse.js

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/**
* Copyright 2013, 2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var FeedParser = require("feedparser");
var request = require("request");
function FeedParseNode(n) {
RED.nodes.createNode(this,n);
this.url = n.url;
this.interval = (parseInt(n.interval)||15) * 60000;
var node = this;
this.interval_id = null;
this.seen = {};
if (this.url !== "") {
var getFeed = function() {
var req = request(node.url, {timeout: 10000, pool: false});
//req.setMaxListeners(50);
//req.setHeader('user-agent', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36');
req.setHeader('accept', 'text/html,application/xhtml+xml');
var feedparser = new FeedParser();
req.on('error', function(err) { node.error(err); });
req.on('response', function(res) {
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if (res.statusCode != 200) { node.warn(RED._("feedparse.errors.badstatuscode")); }
else { res.pipe(feedparser); }
});
feedparser.on('error', function(error) { node.error(error); });
feedparser.on('readable', function () {
var stream = this, article;
while (article = stream.read()) { // jshint ignore:line
if (!(article.guid in node.seen) || ( node.seen[article.guid] !== 0 && node.seen[article.guid] != article.date.getTime())) {
node.seen[article.guid] = article.date?article.date.getTime():0;
var msg = {
topic: article.origlink || article.link,
payload: article.description,
article: article
};
node.send(msg);
}
}
});
feedparser.on('meta', function (meta) {});
feedparser.on('end', function () {});
};
this.interval_id = setInterval(function() { getFeed(); }, node.interval);
getFeed();
} else {
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this.error(RED._("feedparse.errors.invalidurl"));
}
this.on("close", function() {
if (this.interval_id != null) {
clearInterval(this.interval_id);
}
});
}
RED.nodes.registerType("feedparse",FeedParseNode);
}