feat: Add gzip encoding option (#11292)

* feat: Add gzip encoding option

* add ETHEREUM_JSONRPC_HTTP_GZIP_ENABLED to common-blockscout.env

* Update config/runtime.exs

Co-authored-by: Victor Baranov <baranov.viktor.27@gmail.com>

---------

Co-authored-by: Viktor Baranov <baranov.viktor.27@gmail.com>

apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/http/httpoison.ex

@@ -9,9 +9,18 @@ defmodule EthereumJSONRPC.HTTP.HTTPoison do
 
   @impl HTTP
   def json_rpc(url, json, headers, options) when is_binary(url) and is_list(options) do
+    gzip_enabled? = Application.get_env(:ethereum_jsonrpc, EthereumJSONRPC.HTTP)[:gzip_enabled?]
+
+    headers =
+      if gzip_enabled? do
+        [{"Accept-Encoding", "gzip"} | headers]
+      else
+        headers
+      end
+
     case HTTPoison.post(url, json, headers, options) do
-      {:ok, %HTTPoison.Response{body: body, status_code: status_code}} ->
+      {:ok, %HTTPoison.Response{body: body, status_code: status_code, headers: headers}} ->
-        {:ok, %{body: body, status_code: status_code}}
+        {:ok, %{body: try_unzip(gzip_enabled?, body, headers), status_code: status_code}}
 
       {:error, %HTTPoison.Error{reason: reason}} ->
         {:error, reason}
@@ -19,4 +28,31 @@ defmodule EthereumJSONRPC.HTTP.HTTPoison do
   end
 
   def json_rpc(url, _json, _headers, _options) when is_nil(url), do: {:error, "URL is nil"}
+
+  defp try_unzip(true, body, headers) do
+    gzipped =
+      Enum.any?(
+        headers
+        |> Enum.map(fn {k, v} ->
+          {String.downcase(k), String.downcase(v)}
+        end),
+        fn kv ->
+          case kv do
+            {"content-encoding", "gzip"} -> true
+            {"content-encoding", "x-gzip"} -> true
+            _ -> false
+          end
+        end
+      )
+
+    if gzipped do
+      :zlib.gunzip(body)
+    else
+      body
+    end
+  end
+
+  defp try_unzip(_gzip_enabled?, body, _headers) do
+    body
+  end
 end

config/runtime.exs

@@ -189,7 +189,8 @@ config :ethereum_jsonrpc, EthereumJSONRPC.HTTP,
   headers:
     %{"Content-Type" => "application/json"}
     |> Map.merge(ConfigHelper.parse_json_env_var("ETHEREUM_JSONRPC_HTTP_HEADERS", "{}"))
-    |> Map.to_list()
+    |> Map.to_list(),
+  gzip_enabled?: ConfigHelper.parse_bool_env_var("ETHEREUM_JSONRPC_HTTP_GZIP_ENABLED", "false")
 
 config :ethereum_jsonrpc, EthereumJSONRPC.Geth,
   block_traceable?: ConfigHelper.parse_bool_env_var("ETHEREUM_JSONRPC_GETH_TRACE_BY_BLOCK"),

cspell.json

@@ -78,8 +78,8 @@
         "blockreward",
         "blockscout",
         "blockscoutuser",
-        "bools",
         "Boneh",
+        "bools",
         "bridgedtokenlist",
         "brotli",
         "browserconfig",
@@ -255,6 +255,7 @@
         "grecaptcha",
         "greymatter",
         "gtag",
+        "gzipped",
         "happygokitty",
         "haspopup",
         "Hazkne",
@@ -643,12 +644,12 @@
         "xakgj",
         "xbaddress",
         "xdai",
-        "Xname",
         "xffff",
         "xlevel",
         "xlink",
         "xmark",
         "xmlhttprequest",
+        "Xname",
         "xnonsense",
         "xzzz",
         "yellowgreen",
@@ -671,5 +672,5 @@
         "dotenv",
         "html-eex",
         "makefile"
-    ],
+    ]
 }

docker-compose/envs/common-blockscout.env

@@ -1,30 +1,41 @@
 ETHEREUM_JSONRPC_VARIANT=geth
 ETHEREUM_JSONRPC_HTTP_URL=http://host.docker.internal:8545/
-# ETHEREUM_JSONRPC_FALLBACK_HTTP_URL=
 DATABASE_URL=postgresql://blockscout:ceWb1MeLBEeOIfk65gU8EjF8@db:5432/blockscout
+
 # DATABASE_EVENT_URL=
 # DATABASE_QUEUE_TARGET
 # TEST_DATABASE_URL=
 # TEST_DATABASE_READ_ONLY_API_URL=
+
+ETHEREUM_JSONRPC_TRANSPORT=http
+ETHEREUM_JSONRPC_DISABLE_ARCHIVE_BALANCES=false
+# ETHEREUM_JSONRPC_FALLBACK_HTTP_URL=
 ETHEREUM_JSONRPC_TRACE_URL=http://host.docker.internal:8545/
 # ETHEREUM_JSONRPC_FALLBACK_TRACE_URL=
-# ETHEREUM_JSONRPC_FALLBACK_ETH_CALL_URL=
 # ETHEREUM_JSONRPC_ETH_CALL_URL=
-# ETHEREUM_JSONRPC_HTTP_TIMEOUT=
+# ETHEREUM_JSONRPC_FALLBACK_ETH_CALL_URL=
-# CHAIN_TYPE=
-NETWORK=
-SUBNETWORK=Awesome chain
-LOGO=/images/blockscout_logo.svg
 # ETHEREUM_JSONRPC_WS_URL=
 # ETHEREUM_JSONRPC_FALLBACK_WS_URL=
 # ETHEREUM_JSONRPC_WS_RETRY_INTERVAL=
-ETHEREUM_JSONRPC_TRANSPORT=http
-ETHEREUM_JSONRPC_DISABLE_ARCHIVE_BALANCES=false
 # ETHEREUM_JSONRPC_ARCHIVE_BALANCES_WINDOW=200
+# ETHEREUM_JSONRPC_HTTP_TIMEOUT=
 # ETHEREUM_JSONRPC_HTTP_HEADERS=
+# ETHEREUM_JSONRPC_HTTP_GZIP_ENABLED=
 # ETHEREUM_JSONRPC_WAIT_PER_TIMEOUT=
 # ETHEREUM_JSONRPC_GETH_TRACE_BY_BLOCK=
 # ETHEREUM_JSONRPC_GETH_ALLOW_EMPTY_TRACES=
+# ETHEREUM_JSONRPC_DEBUG_TRACE_TRANSACTION_TIMEOUT=
+# ETHEREUM_JSONRPC_HTTP_URLS=
+# ETHEREUM_JSONRPC_FALLBACK_HTTP_URLS=
+# ETHEREUM_JSONRPC_TRACE_URLS=
+# ETHEREUM_JSONRPC_FALLBACK_TRACE_URLS=
+# ETHEREUM_JSONRPC_ETH_CALL_URLS=
+# ETHEREUM_JSONRPC_FALLBACK_ETH_CALL_URLS=
+
+# CHAIN_TYPE=
+NETWORK=
+SUBNETWORK=Awesome chain
+LOGO=/images/blockscout_logo.svg
 IPC_PATH=
 NETWORK_PATH=/
 BLOCKSCOUT_HOST=
@@ -175,7 +186,6 @@ INDEXER_DISABLE_INTERNAL_TRANSACTIONS_FETCHER=false
 # INDEXER_EMPTY_BLOCKS_SANITIZER_INTERVAL=
 # INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE=
 # INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY=
-# ETHEREUM_JSONRPC_DEBUG_TRACE_TRANSACTION_TIMEOUT=
 # INDEXER_BLOCK_REWARD_BATCH_SIZE=
 # INDEXER_BLOCK_REWARD_CONCURRENCY=
 # INDEXER_TOKEN_INSTANCE_USE_BASE_URI_RETRY=