follow_redirect option causes hackney error

[pwightman]

httpoison version: 0.11.1
elixir version: 1.3.4
OTP 19 [erts-8.2]

This is an error in hackney, but it affects httpoison in a simple request so I figured it might be worth tracking here too? hackney issue: benoitc/hackney#400

Using the follow_redirect option with a URL that redirects (https://google.com/ redirects to https://www.google.com/) fails inside hackney's header parsing.

Code:

HTTPoison.get("https://google.com/", [], follow_redirect: true)

Error:

** (FunctionClauseError) no function clause matching in :hackney_headers_new.do_fold/3
      (hackney) /Users/parkerwightman/cs/ohi/deps/hackney/src/hackney_headers_new.erl:147: :hackney_headers_new.do_fold([[{1, "Host", 119}], [{2, "Host", 119}], [{3, "Host", 119}], [{4, "Host", 46}], [{5, "Host", 103}], [{6, "Host", 111}], [{7, "Host", 111}], [{8, "Host", 103}], [{9, "Host", 108}], [{10, "Host", 101}], [{11, "Host", 46}], [{12, "Host", 99}], [{13, "Host", 111}], [{14, "Host", 109}]], #Function<6.29524015/3 in :hackney_headers_new.to_iolist/1>, [["User-Agent", ': ', "hackney/1.7.1", '\r\n']])
      (hackney) /Users/parkerwightman/cs/ohi/deps/hackney/src/hackney_headers_new.erl:184: :hackney_headers_new.to_iolist/1
      (hackney) /Users/parkerwightman/cs/ohi/deps/hackney/src/hackney_request.erl:95: :hackney_request.perform/2
      (hackney) /Users/parkerwightman/cs/ohi/deps/hackney/src/hackney.erl:373: :hackney.send_request/2
      (hackney) /Users/parkerwightman/cs/ohi/deps/hackney/src/hackney.erl:823: :hackney.redirect/2
      (hackney) /Users/parkerwightman/cs/ohi/deps/hackney/src/hackney.erl:757: :hackney.maybe_redirect1/3
      (hackney) /Users/parkerwightman/cs/ohi/deps/hackney/src/hackney.erl:377: :hackney.send_request/2
    (httpoison) lib/httpoison/base.ex:432: HTTPoison.Base.request/9

[m1dnight]

I have same issue. The redirects work with cURL, though.

My particular URL is https://show.io/A6hL83mDL.

[edevil]

FTR, hackney has been updated to 1.8.0 which fixes this issue benoitc/hackney@6046b34. Now, httpoison needs to bump it's hackney dependency version.

[edgurgel]

I will release a new version soon with this new version dependency. Thanks!