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Add new HTML (cheerio/jquery like) parser node ...
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Dave C-J
73
nodes/core/parsers/70-HTML.html
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73
nodes/core/parsers/70-HTML.html
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<!--
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Copyright 2014 IBM Corp.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<script type="text/x-red" data-template-name="html">
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<div class="form-row">
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<label for="node-input-tag"><i class="fa fa-filter"></i> Select</label>
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<input type="text" id="node-input-tag" placeholder="h1">
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</div>
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<div class="form-row">
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<label for="node-input-ret"><i class="fa fa-sign-out"></i> Output</label>
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<select id="node-input-ret" style="width:73% !important">
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<option value="html">the html content of the elements</option>
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<option value="text">only the text content of the elements</option>
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<!-- <option value="attr">an object of any attributes</option> -->
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<!-- <option value="val">return the value from a form element</option> -->
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</select>
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</div>
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<div class="form-row">
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<label for="node-input-as"> </label>
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<select id="node-input-as" style="width:73% !important">
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<option value="single">as a single message containing an array</option>
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<option value="multi">as multiple messages, one for each element</option>
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</select>
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</div>
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<br/>
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<div class="form-row">
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<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
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</div>
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<div class="form-tips">Tip: The <b>Select</b> value is a <a href="http://api.jquery.com/category/selectors/" target="_new"><i><u>jQuery</u></i></a> style selector.</div>
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</script>
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<script type="text/x-red" data-help-name="html">
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<p>Extracts elements from an html document held in <b>msg.payload</b> using a selector.</p>
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<p>The selector uses the <a href="http://api.jquery.com/category/selectors/" target="_new">jQuery syntax</a>.</p>
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<p>The result is either a single message with a payload containing an array of the matched elements, or multiple
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messages that each contain a matched element.</p>
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</script>
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<script type="text/javascript">
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RED.nodes.registerType('html',{
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category: 'function',
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color:"#DEBD5C",
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defaults: {
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tag: {value:""},
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ret: {value:"html"},
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as: {value:"single"},
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name: {value:""}
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},
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inputs:1,
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outputs:1,
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icon: "jq.png",
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label: function() {
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return this.name||this.tag||"html";
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},
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labelStyle: function() {
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return this.name?"node_label_italic":"";
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}
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});
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</script>
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59
nodes/core/parsers/70-HTML.js
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59
nodes/core/parsers/70-HTML.js
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@@ -0,0 +1,59 @@
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/**
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* Copyright 2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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var cheerio = require('cheerio');
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function CheerioNode(n) {
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RED.nodes.createNode(this,n);
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this.tag = n.tag || "h1";
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this.ret = n.ret || "html";
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this.as = n.as || "single";
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var node = this;
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this.on("input", function(msg) {
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try {
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var $ = cheerio.load(msg.payload);
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var pay = [];
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$(node.tag).each(function() {
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if (node.as === "multi") {
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var pay2 = null;
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if (node.ret === "html") { pay2 = $(this).html(); }
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if (node.ret === "text") { pay2 = $(this).text(); }
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//if (node.ret === "attr") { pay2 = $(this)[0]["attribs"]; }
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//if (node.ret === "val") { pay2 = $(this).val(); }
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if (pay2) {
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msg.payload = pay2;
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node.send(msg);
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}
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}
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if (node.as === "single") {
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if (node.ret === "html") { pay.push( $(this).html() ); }
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if (node.ret === "text") { pay.push( $(this).text() ); }
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//if (node.ret === "attr") { pay.push( $(this)[0]["attribs"] ); }
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//if (node.ret === "val") { pay.push( $(this).val() ); }
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}
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});
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if ((node.as === "single") && (pay.length != 0)) {
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msg.payload = pay;
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node.send(msg);
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}
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} catch (error) {
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node.log('Error: '+error.message);
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}
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});
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}
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RED.nodes.registerType("html",CheerioNode);
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}
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