imagekit-developer · stainless-app · Feb 2, 2026 · Feb 4, 2026 · Feb 6, 2026 · Feb 19, 2026
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.2.0"
+  ".": "4.2.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+## 4.2.1 (2026-02-19)
+
+Full Changelog: [v4.2.0...v4.2.1](https://github.com/imagekit-developer/imagekit-ruby/compare/v4.2.0...v4.2.1)
+
+### Bug Fixes
+
+* **client:** always add content-length to post body, even when empty ([e156b70](https://github.com/imagekit-developer/imagekit-ruby/commit/e156b70c82c9b38de49307218fb3f687f651aa5b))
+* **client:** loosen json header parsing ([9fc1fc6](https://github.com/imagekit-developer/imagekit-ruby/commit/9fc1fc60c60173f92f1f99fabe38f9ec826d940d))
+
+
+### Chores
+
+* **docs:** remove www prefix ([a4b9610](https://github.com/imagekit-developer/imagekit-ruby/commit/a4b961058ac8967dcfef109421dbca9ee3eedf0b))
+* **internal:** remove mock server code ([c8aa3b8](https://github.com/imagekit-developer/imagekit-ruby/commit/c8aa3b8c2320102d8e29941f78f1f1ade06cab00))
+* update mock server docs ([1e5ed9e](https://github.com/imagekit-developer/imagekit-ruby/commit/1e5ed9ea31388b76995c292fc22f9ed773ad6f40))
+
 ## 4.2.0 (2026-02-02)
 
 Full Changelog: [v4.1.2...v4.2.0](https://github.com/imagekit-developer/imagekit-ruby/compare/v4.1.2...v4.2.0)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -43,13 +43,13 @@ If you’d like to use the repository from source, you can either install from g
 To install via git in your `Gemfile`:
 
 ```ruby
-gem "imagekitio", git: "https://www.github.com/imagekit-developer/imagekit-ruby"
+gem "imagekitio", git: "https://github.com/imagekit-developer/imagekit-ruby"
 ```
 
 Alternatively, reference local copy of the repo:
 
 ```bash
-$ git clone -- 'https://www.github.com/imagekit-developer/imagekit-ruby' '<path-to-repo>'
+$ git clone -- 'https://github.com/imagekit-developer/imagekit-ruby' '<path-to-repo>'
 ```
 
 ```ruby
@@ -66,12 +66,6 @@ $ bundle exec rake
 
 ## Running tests
 
-Most tests require you to [set up a mock server](https://github.com/stoplightio/prism) against the OpenAPI spec to run the tests.
-
-```bash
-$ npx prism mock path/to/your/openapi.yml
-```
-
 ```bash
 $ bundle exec rake test
 ```

diff --git a/Gemfile.lock b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    imagekitio (4.2.0)
+    imagekitio (4.2.1)
       cgi
       connection_pool
 

diff --git a/README.md b/README.md
@@ -45,7 +45,7 @@ To use this gem, install via Bundler by adding the following to your application
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "imagekitio", "~> 4.2.0"
+gem "imagekitio", "~> 4.2.1"
 ```
 
 <!-- x-release-please-end -->

diff --git a/lib/imagekitio/internal/transport/pooled_net_requester.rb b/lib/imagekitio/internal/transport/pooled_net_requester.rb
@@ -75,7 +75,7 @@ def build_request(request, &blk)
 
             case body
             in nil
-              nil
+              req["content-length"] ||= 0 unless req["transfer-encoding"]
             in String
               req["content-length"] ||= body.bytesize.to_s unless req["transfer-encoding"]
               req.body_stream = Imagekitio::Internal::Util::ReadIOAdapter.new(body, &blk)

diff --git a/lib/imagekitio/internal/util.rb b/lib/imagekitio/internal/util.rb
@@ -485,7 +485,7 @@ def writable_enum(&blk)
       end
 
       # @type [Regexp]
-      JSON_CONTENT = %r{^application/(?:vnd(?:\.[^.]+)*\+)?json(?!l)}
+      JSON_CONTENT = %r{^application/(?:[a-zA-Z0-9.-]+\+)?json(?!l)}
       # @type [Regexp]
       JSONL_CONTENT = %r{^application/(:?x-(?:n|l)djson)|(:?(?:x-)?jsonl)}
 

diff --git a/lib/imagekitio/version.rb b/lib/imagekitio/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Imagekitio
-  VERSION = "4.2.0"
+  VERSION = "4.2.1"
 end
diff --git a/rbi/imagekitio/internal/util.rbi b/rbi/imagekitio/internal/util.rbi
@@ -296,7 +296,7 @@ module Imagekitio
       end
 
       JSON_CONTENT =
-        T.let(%r{^application/(?:vnd(?:\.[^.]+)*\+)?json(?!l)}, Regexp)
+        T.let(%r{^application/(?:[a-zA-Z0-9.-]+\+)?json(?!l)}, Regexp)
       JSONL_CONTENT =
         T.let(%r{^application/(:?x-(?:n|l)djson)|(:?(?:x-)?jsonl)}, Regexp)
 

diff --git a/scripts/mock b/scripts/mock
diff --git a/scripts/test b/scripts/test
@@ -4,53 +4,7 @@ set -e
 
 cd -- "$(dirname -- "$0")/.."
 
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-YELLOW='\033[0;33m'
-NC='\033[0m' # No Color
 
-function prism_is_running() {
-  curl --silent "http://localhost:4010" >/dev/null 2>&1
-}
-
-kill_server_on_port() {
-  pids=$(lsof -t -i tcp:"$1" || echo "")
-  if [ "$pids" != "" ]; then
-    kill "$pids"
-    echo "Stopped $pids."
-  fi
-}
-
-function is_overriding_api_base_url() {
-  [ -n "$TEST_API_BASE_URL" ]
-}
-
-if ! is_overriding_api_base_url && ! prism_is_running ; then
-  # When we exit this script, make sure to kill the background mock server process
-  trap 'kill_server_on_port 4010' EXIT
-
-  # Start the dev server
-  ./scripts/mock --daemon
-fi
-
-if is_overriding_api_base_url ; then
-  echo -e "${GREEN}✔ Running tests against ${TEST_API_BASE_URL}${NC}"
-  echo
-elif ! prism_is_running ; then
-  echo -e "${RED}ERROR:${NC} The test suite will not run without a mock Prism server"
-  echo -e "running against your OpenAPI spec."
-  echo
-  echo -e "To run the server, pass in the path or url of your OpenAPI"
-  echo -e "spec to the prism command:"
-  echo
-  echo -e "  \$ ${YELLOW}npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock path/to/your.openapi.yml${NC}"
-  echo
-
-  exit 1
-else
-  echo -e "${GREEN}✔ Mock prism server is running with your OpenAPI spec${NC}"
-  echo
-fi
 
 echo "==> Running tests"
 bundle exec rake test "$@"
diff --git a/test/imagekitio/internal/util_test.rb b/test/imagekitio/internal/util_test.rb
@@ -171,6 +171,8 @@ def test_json_content
     cases = {
       "application/json" => true,
       "application/jsonl" => false,
+      "application/arbitrary+json" => true,
+      "application/ARBITRARY+json" => true,
       "application/vnd.github.v3+json" => true,
       "application/vnd.api+json" => true
     }

diff --git a/test/imagekitio/resources/accounts/origins_test.rb b/test/imagekitio/resources/accounts/origins_test.rb
@@ -4,7 +4,7 @@
 
 class Imagekitio::Test::Resources::Accounts::OriginsTest < Imagekitio::Test::ResourceTest
   def test_create_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response =
       @image_kit.accounts.origins.create(
@@ -114,7 +114,7 @@ def test_create_required_params
   end
 
   def test_update_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response =
       @image_kit.accounts.origins.update(
@@ -225,7 +225,7 @@ def test_update_required_params
   end
 
   def test_list
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.origins.list
 
@@ -235,7 +235,7 @@ def test_list
   end
 
   def test_delete
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.origins.delete("id")
 
@@ -245,7 +245,7 @@ def test_delete
   end
 
   def test_get
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.origins.get("id")
 

diff --git a/test/imagekitio/resources/accounts/url_endpoints_test.rb b/test/imagekitio/resources/accounts/url_endpoints_test.rb
@@ -4,7 +4,7 @@
 
 class Imagekitio::Test::Resources::Accounts::URLEndpointsTest < Imagekitio::Test::ResourceTest
   def test_create_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.url_endpoints.create(description: "My custom URL endpoint")
 
@@ -24,7 +24,7 @@ def test_create_required_params
   end
 
   def test_update_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.url_endpoints.update("id", description: "My custom URL endpoint")
 
@@ -44,7 +44,7 @@ def test_update_required_params
   end
 
   def test_list
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.url_endpoints.list
 
@@ -54,7 +54,7 @@ def test_list
   end
 
   def test_delete
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.url_endpoints.delete("id")
 
@@ -64,7 +64,7 @@ def test_delete
   end
 
   def test_get
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.url_endpoints.get("id")
 

diff --git a/test/imagekitio/resources/accounts/usage_test.rb b/test/imagekitio/resources/accounts/usage_test.rb
@@ -4,7 +4,7 @@
 
 class Imagekitio::Test::Resources::Accounts::UsageTest < Imagekitio::Test::ResourceTest
   def test_get_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.accounts.usage.get(end_date: "2019-12-27", start_date: "2019-12-27")
 

diff --git a/test/imagekitio/resources/assets_test.rb b/test/imagekitio/resources/assets_test.rb
@@ -4,7 +4,7 @@
 
 class Imagekitio::Test::Resources::AssetsTest < Imagekitio::Test::ResourceTest
   def test_list
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.assets.list
 

diff --git a/test/imagekitio/resources/beta/v2/files_test.rb b/test/imagekitio/resources/beta/v2/files_test.rb
@@ -4,7 +4,7 @@
 
 class Imagekitio::Test::Resources::Beta::V2::FilesTest < Imagekitio::Test::ResourceTest
   def test_upload_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.beta.v2.files.upload(file: Pathname(__FILE__), file_name: "fileName")
 

diff --git a/test/imagekitio/resources/cache/invalidation_test.rb b/test/imagekitio/resources/cache/invalidation_test.rb
@@ -4,7 +4,7 @@
 
 class Imagekitio::Test::Resources::Cache::InvalidationTest < Imagekitio::Test::ResourceTest
   def test_create_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response =
       @image_kit.cache.invalidation.create(url: "https://ik.imagekit.io/your_imagekit_id/default-image.jpg")
@@ -21,7 +21,7 @@ def test_create_required_params
   end
 
   def test_get
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.cache.invalidation.get("requestId")
 

diff --git a/test/imagekitio/resources/custom_metadata_fields_test.rb b/test/imagekitio/resources/custom_metadata_fields_test.rb
@@ -4,7 +4,7 @@
 
 class Imagekitio::Test::Resources::CustomMetadataFieldsTest < Imagekitio::Test::ResourceTest
   def test_create_required_params
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response =
       @image_kit.custom_metadata_fields.create(label: "price", name: "price", schema: {type: :Number})
@@ -24,7 +24,7 @@ def test_create_required_params
   end
 
   def test_update
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.custom_metadata_fields.update("id")
 
@@ -43,7 +43,7 @@ def test_update
   end
 
   def test_list
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.custom_metadata_fields.list
 
@@ -53,7 +53,7 @@ def test_list
   end
 
   def test_delete
-    skip("Prism tests are disabled")
+    skip("Mock server tests are disabled")
 
     response = @image_kit.custom_metadata_fields.delete("id")