Longpolling: Does not survive random 502 from Telegram

[LeviSchuck]

My bot did not resume polling after encountering a 502 from Telegram by longpolling.

Exception in thread "async-dispatch-18" clojure.lang.ExceptionInfo: clj-http: status 502 {:cached nil, :request-time 6929, :repeatable? false, :protocol-version {:name "HTTP", :major 1, :minor 1}, :streaming? true, :http-client #object[org.apache.http.impl.client.InternalHttpClient 0x6e992d0a "org.apache.http.impl.client.InternalHttpClient@6e992d0a"], :chunked? false, :type :clj-http.client/unexceptional-status, :reason-phrase "Bad Gateway", :headers {"Server" "nginx/1.12.2", "Date" "Sun, 28 Oct 2018 01:16:34 GMT", "Content-Type" "application/json", "Content-Length" "57", "Connection" "close", "Access-Control-Allow-Origin" "*", "Access-Control-Expose-Headers" "Content-Length,Content-Type,Date,Server,Connection"}, :orig-content-encoding nil, :status 502, :length 57, :body "{\"ok\":false,\"error_code\":502,\"description\":\"Bad Gateway\"}", :trace-redirects []}
    at slingshot.support$stack_trace.invoke(support.clj:201)
    at clj_http.client$exceptions_response.invokeStatic(client.clj:245)
    at clj_http.client$exceptions_response.invoke(client.clj:236)
    at clj_http.client$wrap_exceptions$fn__10385.invoke(client.clj:254)
    at clj_http.client$wrap_accept$fn__10627.invoke(client.clj:737)
    at clj_http.client$wrap_accept_encoding$fn__10634.invoke(client.clj:759)
    at clj_http.client$wrap_content_type$fn__10621.invoke(client.clj:720)
    at clj_http.client$wrap_form_params$fn__10724.invoke(client.clj:961)
    at clj_http.client$wrap_nested_params$fn__10741.invoke(client.clj:995)
    at clj_http.client$wrap_flatten_nested_params$fn__10750.invoke(client.clj:1019)
    at clj_http.client$wrap_method$fn__10682.invoke(client.clj:895)
    at clj_http.cookies$wrap_cookies$fn__7853.invoke(cookies.clj:131)
    at clj_http.links$wrap_links$fn__9284.invoke(links.clj:63)
    at clj_http.client$wrap_unknown_host$fn__10758.invoke(client.clj:1048)
    at clj_http.client$request_STAR_.invokeStatic(client.clj:1176)
    at clj_http.client$request_STAR_.invoke(client.clj:1169)
    at clj_http.client$get.invokeStatic(client.clj:1182)
    at clj_http.client$get.doInvoke(client.clj:1178)
    at clojure.lang.RestFn.invoke(RestFn.java:423)
    at morse.api$get_updates.invokeStatic(api.clj:17)
    at morse.api$get_updates.invoke(api.clj:10)

Would recommend retrying a connection every 10-30 seconds as longpolling sessions may be arbitrarily resumed later

[LeviSchuck]

It's happened several times each day by now, the program still runs but is no longer listening. I'm more familiar with java than clojure so I'm not really sure about supplying a PR

[LeviSchuck]

Webhooks require an externally available endpoint which may not be provisioned for small personal projects. This is a valid use of the telegram bots API, so that comment was not constructive @l0rem

Due to this issue I have backed down to Java and no longer am using this library.

[ilevd]

It seems it has been fixed in 8fa55c1f27e28dea13f9cec6006696509736f76f