I'm trying to retrieve a URL. At the time of writing: https://upvote.pub/
Using the java.net.URL, I can retrieve this fine:
=> (count (slurp (.openStream (java.net.URL. "https://upvote.pub/"))))
44353
Ditto clj-http:
=> (count (:body (clj-http.client/get "https://upvote.pub/")))
44353
But when I use HTTPKit I run into problems:
=> @(http/get "https://upvote.pub/")
{:opts {:method :get, :url "https://upvote.pub/"}, :error #error {
:cause "No status"
:via
[{:type org.httpkit.ProtocolException
:message "No status"
:at [org.httpkit.client.RespListener onCompleted "RespListener.java" 126]}]
:trace
[[org.httpkit.client.RespListener onCompleted "RespListener.java" 126]
[org.httpkit.client.Request finish "Request.java" 51]
[org.httpkit.client.HttpClient doRead "HttpClient.java" 156]
[org.httpkit.client.HttpClient run "HttpClient.java" 426]
[java.lang.Thread run "Thread.java" 745]]}}
This site uses Let's Encrypt. However, other Let's Encrypt sites seem to work:
=> (-> "https://letsencrypt.org/" http/get deref :body count)
21490
The certificate has different properties, but it's from the same authority.
Furthermore, if I include :insecure? true, the error still happens.
I thought this might be related to this HTTPS + proxy bug, as the symptoms are similar and Google App Engine seems to be load-balancing the site. However, this fix was rolled into release 2.2.0.
Is this a bug with HTTP-Kit? Can I work round it?
It looks like this was caused by SNI (Server Name Identification). I used HTTP Kit version “2.3.0-alpha5” and followed this blog post. It now works.