Soundcloud embed stream URL (Node, JSON)

问题

I'm currently using Node to scrape a blog that stores selected data in a JSON file. When scraping a blog post that contains an embedded track from Soundcloud I seem to only be able to collect the iframe src and not that actual track link (either soundcloud link or stream link).

When I scrape the iframe src url I seem to only be able to get a link that's in the following format: https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/120261008&color=000000&auto_play=false&show_artwork=false

If I'm not able to scrape the track URL is there a way I'm able to manipulate how the above link is stored into the array? In order for this link to be usable I need to only store the url=https%3A//api.soundcloud.com/tracks/120261008 (minus the url=).

But then the problem with this is that the %3A needs replacing to a :

What's the best way to manipulate the url to achieve the desired output url either when it's being stored or when it's being called?

回答1:

I'm not exactly sure what you're planning on doing with the track URL once you have it, but to get the permalink URL for a track/playlist your going to need a two step approach. First you're going to need to parse the url parameter in the query string in the iframe src:

CLIENT_ID = 'client_id=b45b1aa10f1ac2941910a7f0d10f8e28';
var src = 'https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/120261008&color=000000&auto_play=false&show_artwork=false',
    match = src.match(/url=([^&]*)/),
    resource = match[0],
    stream = decodeURIComponent(match[1])+'/stream/?'+CLIENT_ID;

Then you're going to need to make an HTTP request to SoundCloud's resolve API to actually convert that resource into the permalink URL:

var url = 'http://api.soundcloud.com/resolve.json?'+resource+'&'+CLIENT_ID;
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.onload = function(){
  var data = JSON.parse(xhr.responseText);
  // do something with the data
  console.log(data.permalink_url);
};
xhr.send();

来源：https://stackoverflow.com/questions/20203275/soundcloud-embed-stream-url-node-json

标签

javascript

json

node.js

iframe

soundcloud