hi all! i had to debug a URLFetch problem recently, and the root cause turned out to be that i was unexpectedly receiving a brotli-compressed response. it took me a while to figure out why: evidently URLFetch is adding gzip,deflate,br to outbound requests' Accept-Encoding HTTP header.
is this expected? it's not documented on https://cloud.google.com/appengine/docs/standard/python/outbound-requests#request_headers , and brotli support isn't built into many common HTTP libraries, e.g. python requests, so this will usually be an unpleasant surprise when talking to a server that supports brotli. is it unintentional? should i file a bug? here's a snippet that reproduces this on https://shell-hrd.appspot.com/ : >>> from google.appengine.api import urlfetch >>> resp = urlfetch.fetch('https://httpbin.org/headers', >>> headers={'Accept-Encoding': 'foo'}) >>> resp.status_code 200 >>> print(resp.content) { "headers": { "Accept-Encoding": "foo,gzip,deflate,br", "Connection": "close", "Host": "httpbin.org", "User-Agent": "AppEngine-Google; (+http://code.google.com/appengine; appid: s~shell-hrd)", "X-Cloud-Trace-Context": "795505ff8141cf535fa9cf33afe59daa/1604381323415253803;o=1" } } -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/193794a4-4cda-4a2b-a5f8-0e0e69b64cd8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
