frodovdr/node-red
1
0
Fork 0
mirror of https://github.com/node-red/node-red.git synced 2023-10-10 13:36:53 +02:00
Code Issues Releases Wiki Activity

Add new HTML (cheerio/jquery like) parser node ...

Browse Source
This commit is contained in:
Dave C-J 2014-06-24 13:22:16 +01:00
parent 842e7cf5f5
commit cf70fee8c7
2 changed files with 132 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

73
nodes/core/parsers/70-HTML.html Normal file
View File

@ -0,0 +1,73 @@
<!--
Copyright 2014 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.
-->
<script type="text/x-red" data-template-name="html">
<div class="form-row">
<label for="node-input-tag"><i class="fa fa-filter"></i> Select</label>
<input type="text" id="node-input-tag" placeholder="h1">
</div>
<div class="form-row">
<label for="node-input-ret"><i class="fa fa-sign-out"></i> Output</label>
<select id="node-input-ret" style="width:73% !important">
<option value="html">the html content of the elements</option>
<option value="text">only the text content of the elements</option>
<!-- <option value="attr">an object of any attributes</option> -->
<!-- <option value="val">return the value from a form element</option> -->
</select>
</div>
<div class="form-row">
<label for="node-input-as">&nbsp;</label>
<select id="node-input-as" style="width:73% !important">
<option value="single">as a single message containing an array</option>
<option value="multi">as multiple messages, one for each element</option>
</select>
</div>
<br/>
<div class="form-row">
<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
<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>
</script>
<script type="text/x-red" data-help-name="html">
<p>Extracts elements from an html document held in <b>msg.payload</b> using a selector.</p>
<p>The selector uses the <a href="http://api.jquery.com/category/selectors/" target="_new">jQuery syntax</a>.</p>
<p>The result is either a single message with a payload containing an array of the matched elements, or multiple
messages that each contain a matched element.</p>
</script>
<script type="text/javascript">
RED.nodes.registerType('html',{
category: 'function',
color:"#DEBD5C",
defaults: {
tag: {value:""},
ret: {value:"html"},
as: {value:"single"},
name: {value:""}
},
inputs:1,
outputs:1,
icon: "jq.png",
label: function() {
return this.name||this.tag||"html";
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
</script>

59
nodes/core/parsers/70-HTML.js Normal file
View File

@ -0,0 +1,59 @@
/**
* Copyright 2014 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) {
var cheerio = require('cheerio');
function CheerioNode(n) {
RED.nodes.createNode(this,n);
this.tag = n.tag || "h1";
this.ret = n.ret || "html";
this.as = n.as || "single";
var node = this;
this.on("input", function(msg) {
try {
var $ = cheerio.load(msg.payload);
var pay = [];
$(node.tag).each(function() {
if (node.as === "multi") {
var pay2 = null;
if (node.ret === "html") { pay2 = $(this).html(); }
if (node.ret === "text") { pay2 = $(this).text(); }
//if (node.ret === "attr") { pay2 = $(this)[0]["attribs"]; }
//if (node.ret === "val") { pay2 = $(this).val(); }
if (pay2) {
msg.payload = pay2;
node.send(msg);
}
}
if (node.as === "single") {
if (node.ret === "html") { pay.push( $(this).html() ); }
if (node.ret === "text") { pay.push( $(this).text() ); }
//if (node.ret === "attr") { pay.push( $(this)[0]["attribs"] ); }
//if (node.ret === "val") { pay.push( $(this).val() ); }
}
});
if ((node.as === "single") && (pay.length != 0)) {
msg.payload = pay;
node.send(msg);
}
} catch (error) {
node.log('Error: '+error.message);
}
});
}
RED.nodes.registerType("html",CheerioNode);
}