Youtube API - Subscribing to Push Notifications
Solution 1
- you need to send request to subscribe a channel
- a callback that varifies the subscription request and get actual data on update
subscribe function:
subscribe.php may look like:
<?php
function subscribeYoutubeChannel($channel_id = null, $subscribe = true) {
$subscribe_url = 'https://pubsubhubbub.appspot.com/subscribe';
$topic_url = 'https://www.youtube.com/xml/feeds/videos.xml?channel_id={CHANNEL_ID}';
$callback_url = 'http://' . $_SERVER['SERVER_NAME'] . str_replace(basename($_SERVER['REQUEST_URI']), '', $_SERVER['REQUEST_URI']) . 'youtube_subscribe_callback.php';
$data = array(
'hub.mode' => $subscribe ? 'subscribe' : 'unsubscribe',
'hub.callback' => $callback_url,
'hub.lease_seconds'=>60*60*24*365,
'hub.topic'=> str_replace(array(
'{CHANNEL_ID}'
), array(
$channel_id
), $topic_url)
);
$opts = array('http' =>
array(
'method' => 'POST',
'header' => 'Content-type: application/x-www-form-urlencoded',
'content' => http_build_query($data)
)
);
$context = stream_context_create($opts);
@file_get_contents($subscribe_url, false, $context);
return preg_match('200', $http_response_header[0]) === 1;
}
after the request is sent, the pusub service will call youtube_subscribe_callback.php to verify the subscription it will use the GET method and it expects to receive an answer which is "hub_challenge". after that if you upload a video to your test channel youtube_subscribe_callback.php will receive POST request with data.
so youtube_subscribe_callback.php (defined in subscribeYoutubeChannel function) may look like:
<?php
if (isset($_GET['hub_challenge'])) {
echo $_REQUEST['hub_challenge'];
} else {
$video = parseYoutubeUpdate(file_get_contents('php://input'));
}
function parseYoutubeUpdate($data) {
$xml = simplexml_load_string($data, 'SimpleXMLElement', LIBXML_NOCDATA);
$video_id = substr((string)$xml->entry->id, 9);
$channel_id = substr((string)$xml->entry->author->uri, 32);
$published = (string)$xml->entry->published;
return array(
'video_id'=>$video_id,
'channel_id'=>$channel_id,
'published'=>$published
);
}
Solution 2
I wasn't able to subscribe channel by id, but was able to do it by username:
https://www.youtube.com/feeds/videos.xml?user=username
So, you go to this page:
https://pubsubhubbub.appspot.com/subscribe
Insert your callback URL, RSS feed from youtube with username, and mode "subscribe".
Don't forget to reply from your callback URL, so it can confirm subscription, in PHP just print:
echo $_REQUEST["hub_challenge"];
Solution 3
The process is usually two steps, first you go to the subscribe page, input your callback server url, topic url (which is basically the feed url for the ytb channel you want to listen to, the other fields are optional), the pub server will verify your subscription with a GET
request to your callback server, in go it can look like this:
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
challenge := r.URL.Query().Get("hub.challenge")
if challenge != "" {
fmt.Fprintf(w, challenge)
}
})
Then on every new video (or title, desc of an old video is updated), the pub will submit a POST
request to your server with an xml
in the body looking similar to this:
<?xml version='1.0' encoding='UTF-8'?>
<feed xmlns:yt="http://www.youtube.com/xml/schemas/2015" xmlns="http://www.w3.org/2005/Atom">
<link rel="hub" href="https://pubsubhubbub.appspot.com" />
<link rel="self" href="https://www.youtube.com/xml/feeds/videos.xml?channel_id=UCtEorrVfo4GQsN82HsrnKyk" />
<title>YouTube video feed</title>
<updated>2018-12-12T06:02:55.950497732+00:00</updated>
<entry>
<id>yt:video:_em_FFNUcvs</id>
<yt:videoId>_em_FFNUcvs</yt:videoId>
<yt:channelId>UCtEorrVfo4GQsN82HsrnKyk</yt:channelId>
<title>December 12, 20</title>
<link rel="alternate" href="https://www.youtube.com/watch?v=_em_FFNUcvs" />
<author>
<name>Ak Ram</name>
<uri>https://www.youtube.com/channel/UCtEorrVfo4GQsN82HsrnKyk</uri>
</author>
<published>2018-12-12T05:57:07+00:00</published>
<updated>2018-12-12T06:02:55.950497732+00:00</updated>
</entry>
</feed>
Related videos on Youtube
Poyu
Updated on September 15, 2022Comments
-
Poyu almost 2 years
My final goal is to set up a Webhook whenever a YouTube user uploads a video. After some research I got to this article.
But when I get to the part
https://www.youtube.com/xml/feeds/videos.xml?channel_id=CHANNEL_ID
, I gotRestricted topic
error when trying the subscribe to the Google/SuperFeedr hubs. I also got my callback URL working.The topic I want to subscribe to is this:
https://www.youtube.com/xml/feeds/videos.xml?channel_id=UC7T8roVtC_3afWKTOGtLlBA
Which shows nothing upon visiting via a browser.
Am I doing something wrong? I've been struggling for a few hours now, any help is appreciated. Thanks!
UPDATE: I found this, but those feeds doesn't have the
rel=”hub”
attribute, so probably useless if I want to subscribe it to hub.-
user3498909 about 9 yearsSame issue here. It also took me long time to realise that
https://www.youtube.com/XML/feeds/videos.xml?channel_id=
url were different from<link rel="alternate" type="application/rss+xml" title="RSS" ...>
given in youtube channel page source code -
user3498909 over 8 yearsIt has been fixed : code.google.com/p/gdata-issues/issues/detail?id=7138#c15
-
danmichaelo about 7 yearsWorked for me using the
https://www.youtube.com/xml/feeds/videos.xml?channel_id=CHANNEL_ID
format now (subscriber diagnostics at pubsubhubbub.appspot.com/subscribe didn't work though..).
-
-
dikirill almost 9 yearsBTW, I've subscribed yesterday through pubsubhubbub one of news channels on youtube, and never get ping back to my callback url. So, I'm not sure if this works for youtube RSS feeds.
-
timraybould almost 5 yearsIt's 'hub.challenge' not 'hub_challenge' (at least now it is). Also, maybe useful for someone to know specifically that this value for 'hub.challenge' is passed as a query param (not in headers or body) when the callback URL is hit after the subscription request.
-
Alex Benfica about 4 yearsDo you know if there is a limit in the number of channels I can subscribe to? I am thinking about using this as the primary way to get a channel update, but for hundreds of thousands of channels.
-
Markus Laire almost 4 years@timraybould PHP will replace dot with underscore in $_GET, so 'hub_challenge' is correct here.