node-red-contrib-cheerio-function 1.0.0-rc.9
Node-RED module cheerio a fast, flexible & lean implementation of core jQuery designed specifically for the server.
Node-RED module cheerio a fast, flexible & lean implementation of core jQuery designed specifically for the server.
Features
❤ Familiar syntax: Cheerio implements a subset of core jQuery. Cheerio removes all the DOM inconsistencies and browser cruft from the jQuery library, revealing its truly gorgeous API.
ϟ Blazingly fast: Cheerio works with a very simple, consistent DOM model. As a result parsing, manipulating, and rendering are incredibly efficient. Preliminary end-to-end benchmarks suggest that cheerio is about 8x faster than JSDOM.
❁ Incredibly flexible: Cheerio wraps around @FB55's forgiving htmlparser2. Cheerio can parse nearly any HTML or XML document.
Cheerio is not a web browser
Cheerio parses markup and provides an API for traversing/manipulating the resulting data structure. It does not interpret the result as a web browser does. Specifically, it does not produce a visual rendering, apply CSS, load external resources, or execute JavaScript. If your use case requires any of this functionality, you should consider projects like PhantomJS or JSDom.
Example Flow
This example flow fetches the full download link for the latest android-sdk-tools for linux form the wepage.
[{"id":"b6a346f6.e20ab8","type":"http in","z":"f4239029.65f45","name":"","url":"/android-sdk/latest","method":"get","upload":false,"swaggerDoc":"","x":120,"y":100,"wires":[["7c84616a.4312"]]},{"id":"8e1394d8.ff4f48","type":"http response","z":"f4239029.65f45","name":"","statusCode":"","headers":{"Content-Type":"application/json"},"x":810,"y":100,"wires":[]},{"id":"7c84616a.4312","type":"http request","z":"f4239029.65f45","name":"","method":"GET","ret":"txt","url":"https://developer.android.com/studio/","tls":"7434bd72.4c5b14","x":310,"y":100,"wires":[["fbbeb13d.ce447"]]},{"id":"fbbeb13d.ce447","type":"cheerio-function","z":"f4239029.65f45","name":"extract sdk-tools-linux","func":"msg.payload={url:$(\"a[href*='sdk-tools-linux']\")\n.attr(\"href\")};\nreturn msg;","outputs":1,"noerr":0,"x":520,"y":100,"wires":[["92a1a104.8b461"]]},{"id":"92a1a104.8b461","type":"json","z":"f4239029.65f45","name":"","property":"payload","action":"str","pretty":true,"x":690,"y":100,"wires":[["8e1394d8.ff4f48"]]},{"id":"204a6e81.d03bc2","type":"comment","z":"f4239029.65f45","name":"https://developer.android.com/studio/","info":"","x":160,"y":60,"wires":[]},{"id":"7434bd72.4c5b14","type":"tls-config","z":"","name":"NO Cert Check","cert":"","key":"","ca":"","certname":"","keyname":"","caname":"","verifyservercert":false}]
Usage
for detailed usage of cheerio head over to github.com/cheeriojs.
