Token instance metadata retriever refinement: process metadata if only image URL is passed to tokenURI

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### Features
 
 ### Fixes
+- [#3128](https://github.com/poanetwork/blockscout/pull/3128) - Token instance metadata retriever refinement: process metadata if only image URL is passed to token URI
 - [#3126](https://github.com/poanetwork/blockscout/pull/3126) - Fetch balance only for blocks which are greater or equal block with FIRST_BLOCK number
 - [#3122](https://github.com/poanetwork/blockscout/pull/3122) - Exclude balance percentage calculation for burn address on accounts page
 - [#3121](https://github.com/poanetwork/blockscout/pull/3121) - Geth: handle response from eth_getblockbyhash JSON RPC method without totalDifficulty (uncle blocks)

apps/block_scout_web/mix.exs

@@ -90,7 +90,7 @@ defmodule BlockScoutWeb.Mixfile do
       {:floki, "~> 0.20.1", only: :test},
       {:flow, "~> 0.12"},
       {:gettext, "~> 0.16.1"},
-      {:httpoison, "~> 1.0"},
+      {:httpoison, "~> 1.6"},
       {:indexer, in_umbrella: true, runtime: false},
       # JSON parser and generator
       {:jason, "~> 1.0"},

apps/ethereum_jsonrpc/mix.exs

@@ -70,7 +70,7 @@ defmodule EthereumJsonrpc.MixProject do
       # Code coverage
       {:excoveralls, "~> 0.10.0", only: [:test], github: "KronicDeth/excoveralls", branch: "circle-workflows"},
       # JSONRPC HTTP Post calls
-      {:httpoison, "~> 1.0"},
+      {:httpoison, "~> 1.6"},
       # Decode/Encode JSON for JSONRPC
       {:jason, "~> 1.0"},
       # Log errors and application output to separate files

apps/explorer/lib/explorer/token/instance_metadata_retriever.ex

@@ -98,10 +98,16 @@ defmodule Explorer.Token.InstanceMetadataRetriever do
 
   defp fetch_metadata(token_uri) do
     case HTTPoison.get(token_uri) do
-      {:ok, %Response{body: body, status_code: 200}} ->
-        {:ok, json} = decode_json(body)
+      {:ok, %Response{body: body, status_code: 200, headers: headers}} ->
+        if Enum.member?(headers, {"Content-Type", "image/png"}) do
+          json = %{"image" => %{"type" => "image", "description" => token_uri}}
 
-        check_type(json)
+          check_type(json)
+        else
+          {:ok, json} = decode_json(body)
+
+          check_type(json)
+        end
 
       {:ok, %Response{body: body}} ->
         {:error, body}

apps/explorer/mix.exs

@@ -84,7 +84,7 @@ defmodule Explorer.Mixfile do
       # Code coverage
       {:excoveralls, "~> 0.10.0", only: [:test], github: "KronicDeth/excoveralls", branch: "circle-workflows"},
       {:exvcr, "~> 0.10", only: :test},
-      {:httpoison, "~> 1.0"},
+      {:httpoison, "~> 1.6"},
       {:jason, "~> 1.0"},
       {:junit_formatter, ">= 0.0.0", only: [:test], runtime: false},
       # Log errors and application output to separate files

mix.lock

@@ -55,7 +55,7 @@
   "gettext": {:hex, :gettext, "0.16.1", "e2130b25eebcbe02bb343b119a07ae2c7e28bd4b146c4a154da2ffb2b3507af2", [:mix], [], "hexpm", "dd3a7ea5e3e87ee9df29452dd9560709b4c7cc8141537d0b070155038d92bdf1"},
   "hackney": {:hex, :hackney, "1.15.2", "07e33c794f8f8964ee86cebec1a8ed88db5070e52e904b8f12209773c1036085", [:rebar3], [{:certifi, "2.5.1", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "6.0.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "1.0.1", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "1.1.5", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}], "hexpm", "e0100f8ef7d1124222c11ad362c857d3df7cb5f4204054f9f0f4a728666591fc"},
   "html_entities": {:hex, :html_entities, "0.4.0", "f2fee876858cf6aaa9db608820a3209e45a087c5177332799592142b50e89a6b", [:mix], [], "hexpm", "3e3d7156a272950373ce5a4018b1490bea26676f8d6a7d409f6fac8568b8cb9a"},
-  "httpoison": {:hex, :httpoison, "1.0.0", "1f02f827148d945d40b24f0b0a89afe40bfe037171a6cf70f2486976d86921cd", [:mix], [{:hackney, "~> 1.8", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm", "07967c56199f716ce9adb27415ccea1bd76c44f777dd0a6d4166c3d932f37fdf"},
+  "httpoison": {:hex, :httpoison, "1.6.2", "ace7c8d3a361cebccbed19c283c349b3d26991eff73a1eaaa8abae2e3c8089b6", [:mix], [{:hackney, "~> 1.15 and >= 1.15.2", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm", "aa2c74bd271af34239a3948779612f87df2422c2fdcfdbcec28d9c105f0773fe"},
   "idna": {:hex, :idna, "6.0.0", "689c46cbcdf3524c44d5f3dde8001f364cd7608a99556d8fbd8239a5798d4c10", [:rebar3], [{:unicode_util_compat, "0.4.1", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "4bdd305eb64e18b0273864920695cb18d7a2021f31a11b9c5fbcd9a253f936e2"},
   "jason": {:hex, :jason, "1.1.2", "b03dedea67a99223a2eaf9f1264ce37154564de899fd3d8b9a21b1a6fd64afe7", [:mix], [{:decimal, "~> 1.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fdf843bca858203ae1de16da2ee206f53416bbda5dc8c9e78f43243de4bc3afe"},
   "jsx": {:hex, :jsx, "2.8.3", "a05252d381885240744d955fbe3cf810504eb2567164824e19303ea59eef62cf", [:mix, :rebar3], [], "hexpm", "fc3499fed7a726995aa659143a248534adc754ebd16ccd437cd93b649a95091f"},