android - How to detect a redirection in Glide v4 / OkHttp3? -


using glide v4 , okhttp3, how can detect redirection , load url when happens?

my usecase: use glide v4 library okhttp3 download pictures in app. when picture not available, redirection performed server provide picture instead of 1 originaly wanted. can see in browser because when request url a, land on url b second picture. when happens want instead load url c derived url (so not static url).

at moment can detect redirection using okhttp3 interceptor:

public response intercept(@nonnull chain chain) throws ioexception {     string requesturl = chain.request().url().tostring();     response response = chain.proceed(chain.request());     string responseurl = response.request().url().tostring();      boolean redirect = !requesturl.equals(responseurl);     if (redirect) {         timber.d("detected redirection");     }      return response; }

but don't know how cleanly load url c. don't see how can load url in interceptor, , if throw ioexception handle error later in glide requestlistener result in glideexception can't determine why throw.

okhttp should automatically redirecting default , loading final content. see okhttpclient.builder.followredirects.

https://square.github.io/okhttp/3.x/okhttp/okhttp3/okhttpclient.builder.html#followredirects-boolean-

my own testing suggests working, e.g. 

$ oksocial 'https://httpbin.org/redirect-to?url=https://i.ytimg.com/vi/dqw4w9wgxcq/maxresdefault.jpg'

for detecting it, assume interceptor registered via addinterceptor instead of addnetworkinterceptor. correct?

it worth ensuring redirect via 30x response , not via html refresh.


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