jersey-netty-connector – multipart payload can’t be sent when Expect100ContinueFeature is enabled

[zhangzhengming]

Using Jersey v2.46 with JDK 17

Use case 1 - uploading a file with Expect100ContinueFeature enabled.
Use case 2 - uploading a simple json payload with Expect100ContinueFeature enabled.

Steps of reproducing the issue(simple case with simple payload):
Download file JavaProject-100Continue.zip
Follow the steps in readme.txt file in the zip file:

1. Running the test server(node js installation is required):
   cd [base_folder]/JavaProject-100Continue/src/main/resources
   node testserver.js

2. Verify the test server
   Call the server with HTTP header expect:100-continue:
   curl -v --location 'http://127.0.0.1:3000' --header 'Content-Type: application/json' --header 'expect: 100-continue' --data '{"msg": "hello from curl"}'
   Expected response:
   {"message": "Request processed successfully after 100-continue."}

   Call the server without HTTP header:
   curl -v --location 'http://127.0.0.1:3000' --header 'Content-Type: application/json' --data '{"msg": "hello from curl"}'
   Expected response:
   {"message": "Request processed successfully."}

3. Reproduce the issue(java/maven installation are required) with simple json payload:
   cd [base_folder]/JavaProject-100Continue
   mvn clean install && mvn exec:java
   No response returned from server.

4. Just for comparing with the expected behavior, comment out below code to use the default connector provider.
   //defaultConfig.connectorProvider(new NettyConnectorProvider());
   Get response: { "message": "Request processed successfully after 100-continue." }

It seams Jersey can't handle HTTP code 100.

[sxsubram]

With config.register(Expect100ContinueFeature.basic()); feature enabled the payload is not being sent to the server after the server sends the 'Continue' response. Tried changing the size config.register(Expect100ContinueFeature.withCustomThreshold(4096)) but that did not help either.