swagger-api/swagger-codegen

swagger-codegen Java client throws PROTOCOL_ERROR when running on Android

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#8526 opened on Aug 3, 2018

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help wanted

Description

Description

When running Java client on Android, it throws PROTOCOL_ERROR - I think it has something to do with Java client using an old version of OkHttp that has HTTP2.0 bugs

Swagger-codegen version

2.3.1

Swagger declaration file content or url

https://api.cloudmersive.com/convert/docs/v1/swagger

Command line used for generation

java -jar swagger-codegen-cli.jar generate -i https://api.cloudmersive.com/convert/docs/v1/swagger -l java --api-package com.cloudmersive.client --model-package com.cloudmersive.client.model --invoker-package com.cloudmersive.client.invoker --group-id com.cloudmersive --artifact-id cloudmersive-java-api-client --artifact-version 1.1.9 -o .

Steps to reproduce

Generate the client using above command

Create a test project in Android Studio

Immediately see the protocol_error:

com.cloudmersive.client.invoker.ApiException: java.io.IOException: stream was reset: PROTOCOL_ERROR

We also tried generating the client with the other library templates but those don't actually compile - pretty frustrating.

Related issues/PRs

https://github.com/square/okhttp/issues/1844

Suggest a fix/enhancement

Change the Java client to use OK HTTP 3.11.0 instead of old 2.75.0 version

Contributor guide

Tech stack
javaandroid
Domain
apimobile
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaAndroid SDK
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Locate the build configuration file (build.gradle or pom.xml) for the Java client template in the swagger codegen repository. Update the OkHttp dependency version from 2.75.0 to 3.11.0. After making the change, regenerate the client and test it on an Android project to ensure the PROTOCOL ERROR is resolved. If successful, submit a pull request referencing this issue.