'Intermittent ERR_SSL_PROTOCOL_ERROR error for cross domain request
The users of my website are seeing intermittent ERR_SSL_PROTOCOL_ERROR when making cross domain requests to api.flickr.com
By intermittent I mean that I've seen this happen 4 times out of ~1200 requests to the api yesterday.
Failed to load resource: net::ERR_SSL_PROTOCOL_ERROR https://api.flickr.com/services/rest/?method=flickr.photos.getInfo&api_key=.....
My site is and AngularJS application running on Google App Engine and is exclusivley avalable on HTTPS.
sslchecker shows that my site's certificate & certificate chain is installed correctly. Well, I think it looks ok!
sslchecker for api.flickr.com shows that ROOT 1 of the certificate chain is missing. Is that the problem? Is there any way around that for me?
Any other ideas? Is the problem that our certificates are issues by different authorities maybe?
Edit - Some other possibly relevant info gleaned from google analytics
- Have seen it happen for different OSes - Android, iOS, Windows
- Different browsers - Android, Chrome, Safari
- Different Network Domains
Solution 1:[1]
This might be the answer, but i'm guessing that this is probably not a client issue, so i would suggest you to update your api's server with that line added in the header :
Access-Control-Allow-Origin: https://api.flickr.com/*
This should fix the troubles some of your users are facing.
Solution 2:[2]
if you run into this error and you are testing localhost endpoint just make sure you use http instead of https as your url.
eg: http://localhost:8080/ not https://localhost:8080/
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Mekap |
| Solution 2 | Charles Chiakwa |