How is youtube comments feature implemented? I see that they use AJAX but they don't do AJAX calls every second or two.Ajax call is made when there is a new comment on the video. On my page I call a page every 5 seconds with AJAX. So how are they doing that?
你是如何实现youtube评论功能的？我看到他们使用AJAX，但他们不会每隔一两次进行AJAX调用。当视频有新评论时，会调用Ajax。在我的页面上，我每隔5秒使用AJAX调用一个页面。那他们是怎么做到的？
2 个解决方案
#1
1
Personnally when i have a look at Firebug to see Ajax Request, i have one who's called every 2-3 seconds with parameters :
当我看到Firebug看到Ajax请求时，我有一个每隔2-3秒用参数调用的人：
asv 3
ctp 2
docid DbYtqAWDF2U
el detailpage
et 20.087
fmt 34
ns yt
plid AASgAO8pqC5GDlo9
st 20.087
vid VcyzE1TkaJrg4jlA8I_rWIK6z2TaXNB3R
yttk 1
docid is just the id of the video, $_GET['v'] var too.
docid只是视频的ID，$ _GET ['v'] var也是如此。
#2
0
It uses Ajax and if you see the content of the ajax call it contains poll_delay value which is something like 60,000 which means when it has to poll the live comments again.60 seconds in this case.
它使用Ajax，如果你看到ajax调用的内容，它包含poll_delay值，类似于60,000，这意味着它必须再次轮询实时注释。在这种情况下为60秒。
#1
1
Personnally when i have a look at Firebug to see Ajax Request, i have one who's called every 2-3 seconds with parameters :
当我看到Firebug看到Ajax请求时，我有一个每隔2-3秒用参数调用的人：
asv 3
ctp 2
docid DbYtqAWDF2U
el detailpage
et 20.087
fmt 34
ns yt
plid AASgAO8pqC5GDlo9
st 20.087
vid VcyzE1TkaJrg4jlA8I_rWIK6z2TaXNB3R
yttk 1
docid is just the id of the video, $_GET['v'] var too.
docid只是视频的ID，$ _GET ['v'] var也是如此。
#2
0
It uses Ajax and if you see the content of the ajax call it contains poll_delay value which is something like 60,000 which means when it has to poll the live comments again.60 seconds in this case.
它使用Ajax，如果你看到ajax调用的内容，它包含poll_delay值，类似于60,000，这意味着它必须再次轮询实时注释。在这种情况下为60秒。