[gax] Set max_body_size on DecompressResponse for Tesla 1.21 compatibility

clients/gax/lib/google_api/gax/connection.ex

@@ -33,7 +33,12 @@ defmodule GoogleApi.Gax.Connection do
         )
       )
 
-      plug(Tesla.Middleware.DecompressResponse, [])
+      # turnhub patch: Tesla 1.21 made :max_body_size mandatory on the
+      # (de)compression middleware (decompression-bomb CVE fix). Upstream
+      # elixir-google-api was archived (2026-06) before adopting it, so pin
+      # :infinity here to preserve the pre-1.21 behaviour. Remove once we migrate
+      # off this library (turnhub/engage Req+Goth migration).
+      plug(Tesla.Middleware.DecompressResponse, max_body_size: :infinity)
 
       plug(Tesla.Middleware.EncodeJson, engine: Poison)
 
@@ -167,7 +172,7 @@ defmodule GoogleApi.Gax.Connection do
   defp build_body(output, [], file_params) do
     body =
       Enum.reduce(file_params, Tesla.Multipart.new(), fn {file_name, file_path}, b ->
-        Tesla.Multipart.add_file(b, file_path, name: file_name)
+        Tesla.Multipart.add_file(b, file_path, name: to_string(file_name))
       end)
 
     Keyword.put(output, :body, body)
@@ -178,30 +183,35 @@ defmodule GoogleApi.Gax.Connection do
 
     {meta, body_params} = extract_metadata(body_params)
 
-    body = case meta do
-      nil -> body
-      _   -> Tesla.Multipart.add_field(
-        body,
-        :metadata,
-        Poison.encode!(meta),
-        headers: [{:"Content-Type", "application/json"}]
-      )
-    end
+    body =
+      case meta do
+        nil ->
+          body
+
+        _ ->
+          Tesla.Multipart.add_field(
+            body,
+            "metadata",
+            Poison.encode!(meta),
+            headers: [{:"Content-Type", "application/json"}]
+          )
+      end
 
     body =
       Enum.reduce(body_params, body, fn {body_name, data}, b ->
         {res, type} = try_encode_multipart_field(data, meta)
+
         Tesla.Multipart.add_field(
           b,
-          body_name,
+          to_string(body_name),
           res,
           headers: [{:"Content-Type", type}]
         )
       end)
 
     body =
       Enum.reduce(file_params, body, fn {file_name, file_path}, b ->
-        Tesla.Multipart.add_file(b, file_path, name: file_name)
+        Tesla.Multipart.add_file(b, file_path, name: to_string(file_name))
       end)
 
     Keyword.put(output, :body, body)

clients/gax/mix.exs

@@ -27,7 +27,7 @@ defmodule GoogleApi.Gax.MixProject do
   defp deps() do
     [
       {:tesla, "~> 1.2"},
-      {:mime, "~> 1.0"},
+      {:mime, "~> 1.0 or ~> 2.0"},
       {:poison, ">= 3.0.0 and < 5.0.0"},
       {:ex_doc, "~> 0.16", only: :dev},
       {:dialyxir, "~> 0.5", only: [:dev], runtime: false}

clients/gax/test/gax/connection_test.exs

@@ -84,6 +84,7 @@ defmodule Gax.ConnectionTest do
   test "builds a multipart upload request with iodata and content type" do
     metadata = %{contentType: "text/plain"}
     data = ["1", ["2"]]
+
     request =
       Request.new()
       |> Request.add_param(:body, :metadata, metadata)
@@ -94,13 +95,16 @@ defmodule Gax.ConnectionTest do
     [part1, part2] = body.parts
     assert "{\"contentType\":\"text/plain\"}" == part1.body
     assert [{:"Content-Type", "application/json"}] == part1.headers
+    assert [name: "metadata"] == part1.dispositions
     assert data == part2.body
     assert [{:"Content-Type", "text/plain"}] == part2.headers
+    assert [name: "data"] == part2.dispositions
   end
 
   test "builds a multipart upload request with iodata but no content type" do
     metadata = %{foo: "bar"}
     data = ["1", ["2"]]
+
     request =
       Request.new()
       |> Request.add_param(:body, :metadata, metadata)
@@ -118,6 +122,7 @@ defmodule Gax.ConnectionTest do
   test "builds a multipart upload request with a JSON decodable struct" do
     metadata = %{foo: "bar"}
     data = %{baz: "qux"}
+
     request =
       Request.new()
       |> Request.add_param(:body, :metadata, metadata)
@@ -135,6 +140,7 @@ defmodule Gax.ConnectionTest do
   test "builds a multipart upload request with a non-JSON struct" do
     metadata = %{foo: "bar"}
     data = %{baz: {}}
+
     assert_raise(Poison.EncodeError, fn ->
       Request.new()
       |> Request.add_param(:body, :metadata, metadata)