reload/swagger-codegen repository overview

⁠Swagger Code Generator

• Master (2.4.0):
• 3.0.0:

:star::star::star: If you would like to contribute, please refer to guidelines⁠ and a list of open tasks⁠.:star::star::star:

:notebook_with_decorative_cover: For more information, please refer to the Wiki page⁠ and FAQ⁠ :notebook_with_decorative_cover:

:warning: If the OpenAPI/Swagger spec is obtained from an untrusted source, please make sure you've reviewed the spec before using Swagger Codegen to generate the API client, server stub or documentation as code injection⁠ may occur :warning:

:rocket: ProductHunt: https://producthunt.com/posts/swagger-codegen⁠ :rocket:

:notebook_with_decorative_cover: The eBook A Beginner's Guide to Code Generation for REST APIs⁠ is a good starting point for beginners.

⁠Overview

This is the swagger codegen project, which allows generation of API client libraries (SDK generation), server stubs and documentation automatically given an OpenAPI Spec⁠. Currently, the following languages/frameworks are supported:

• API clients: ActionScript, Ada, Apex, Bash, C# (.net 2.0, 3.5 or later), C++ (cpprest, Qt5, Tizen), Clojure, Dart, Elixir, Elm, Eiffel, Erlang, Go, Groovy, Haskell (http-client, Servant), Java (Jersey1.x, Jersey2.x, OkHttp, Retrofit1.x, Retrofit2.x, Feign, RestTemplate, RESTEasy, Vertx, Google API Client Library for Java, Rest-assured), Kotlin, Lua, Node.js (ES5, ES6, AngularJS with Google Closure Compiler annotations) Objective-C, Perl, PHP, PowerShell, Python, R, Ruby, Rust (rust, rust-server), Scala (akka, http4s, swagger-async-httpclient), Swift (2.x, 3.x, 4.x), Typescript (Angular1.x, Angular2.x, Fetch, jQuery, Node)
• Server stubs: Ada, C# (ASP.NET Core, NancyFx), C++ (Pistache, Restbed), Erlang, Go, Haskell (Servant), Java (MSF4J, Spring, Undertow, JAX-RS: CDI, CXF, Inflector, RestEasy, Play Framework, PKMST⁠), Kotlin, PHP (Lumen, Slim, Silex, Symfony⁠, Zend Expressive⁠), Python (Flask), NodeJS, Ruby (Sinatra, Rails5), Rust (rust-server), Scala (Finch⁠, Lagom⁠, Scalatra)
• API documentation generators: HTML, Confluence Wiki
• Configuration files: Apache2⁠
• Others: JMeter

Check out OpenAPI-Spec⁠ for additional information about the OpenAPI project.

⁠Table of contents

• Swagger Code Generator⁠
• Overview⁠
• Table of Contents⁠
• Installation
  • Compatibility⁠
  • Prerequisites⁠
    • OS X Users⁠
  • Building⁠
  • Docker⁠
    • Development in Docker⁠
    • Run docker in Vagrant⁠
    • Public Docker image⁠
  • Homebrew⁠
• Getting Started⁠
• Generators
  • To generate a sample client library⁠
  • Generating libraries from your server⁠
  • Modifying the client library format⁠
  • Making your own codegen modules⁠
  • Where is Javascript???⁠
  • Generating a client from local files⁠
  • Customizing the generator⁠
  • Validating your OpenAPI Spec⁠
  • Generating dynamic html api documentation⁠
  • Generating static html api documentation⁠
  • To build a server stub⁠
  • To build the codegen library⁠
• Workflow Integration⁠
  • Maven Integration⁠
  • Gradle Integration⁠
• Github Integration⁠
• Online Generators⁠
• Guidelines for Contribution⁠
• Companies/Projects using Swagger Codegen⁠
• Presentations/Videos/Tutorials/Books⁠
• Swagger Codegen Core Team⁠
• Swagger Codegen Technical Committee⁠
• License⁠

⁠Compatibility

The OpenAPI Specification has undergone 3 revisions since initial creation in 2010. The swagger-codegen project has the following compatibilities with the OpenAPI Specification:

⁠Prerequisites

If you're looking for the latest stable version, you can grab it directly from Maven.org (Java 7 runtime at a minimum):

wget http://central.maven.org/maven2/io/swagger/swagger-codegen-cli/2.3.1/swagger-codegen-cli-2.3.1.jar -O swagger-codegen-cli.jar

java -jar swagger-codegen-cli.jar help

For Windows users, you will need to install wget⁠ or you can use Invoke-WebRequest in PowerShell (3.0+), e.g. Invoke-WebRequest -OutFile swagger-codegen-cli.jar http://central.maven.org/maven2/io/swagger/swagger-codegen-cli/2.3.1/swagger-codegen-cli-2.3.1.jar

On a mac, it's even easier with brew:

brew install swagger-codegen

To build from source, you need the following installed and available in your $PATH:

• Java 7 or 8⁠

• Apache maven 3.3.3 or greater⁠

⁠OS X Users

Don't forget to install Java 7 or 8. You probably have 1.6.

Export JAVA_HOME in order to use the supported Java version:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
export PATH=${JAVA_HOME}/bin:$PATH

⁠Building

After cloning the project, you can build it from source with this command:

mvn clean package

If you don't have maven installed, you may directly use the included maven wrapper⁠, and build with the command:

./mvnw clean package

⁠Homebrew

To install, run brew install swagger-codegen

Here is an example usage:

swagger-codegen generate -i http://petstore.swagger.io/v2/swagger.json -l ruby -o /tmp/test/

⁠Docker

⁠Development in docker

You can use run-in-docker.sh to do all development. This script maps your local repository to /gen in the docker container. It also maps ~/.m2/repository to the appropriate container location.

To execute mvn package:

git clone https://github.com/swagger-api/swagger-codegen
cd swagger-codegen
./run-in-docker.sh mvn package

Build artifacts are now accessible in your working directory.

Once built, run-in-docker.sh will act as an executable for swagger-codegen-cli. To generate code, you'll need to output to a directory under /gen (e.g. /gen/out). For example:

./run-in-docker.sh help # Executes 'help' command for swagger-codegen-cli
./run-in-docker.sh langs # Executes 'langs' command for swagger-codegen-cli
./run-in-docker.sh /gen/bin/go-petstore.sh  # Builds the Go client
./run-in-docker.sh generate -i modules/swagger-codegen/src/test/resources/2_0/petstore.yaml \
    -l go -o /gen/out/go-petstore -DpackageName=petstore # generates go client, outputs locally to ./out/go-petstore

⁠Run Docker in Vagrant

Prerequisite: install Vagrant⁠ and VirtualBox⁠.

git clone http://github.com/swagger-api/swagger-codegen.git
cd swagger-codegen
vagrant up
vagrant ssh
cd /vagrant
./run-in-docker.sh mvn package

⁠Public Pre-built Docker images

• https://hub.docker.com/r/swaggerapi/swagger-generator/⁠ (official web service)
• https://hub.docker.com/r/swaggerapi/swagger-codegen-cli/⁠ (official CLI)

⁠Swagger Generator Docker Image

The Swagger Generator image can act as a self-hosted web application and API for generating code. This container can be incorporated into a CI pipeline, and requires at least two HTTP requests and some docker orchestration to access generated code.

Example usage (note this assumes jq is installed for command line processing of JSON):

# Start container and save the container id
CID=$(docker run -d swaggerapi/swagger-generator)
# allow for startup
sleep 5
# Get the IP of the running container
GEN_IP=$(docker inspect --format '{{.NetworkSettings.IPAddress}}'  $CID)
# Execute an HTTP request and store the download link
RESULT=$(curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' -d '{
  "swaggerUrl": "http://petstore.swagger.io/v2/swagger.json"
}' 'http://localhost:8188/api/gen/clients/javascript' | jq '.link' | tr -d '"')
# Download the generated zip and redirect to a file
curl $RESULT > result.zip
# Shutdown the swagger generator image
docker stop $CID && docker rm $CID

In the example above, result.zip will contain the generated client.

⁠Swagger Codegen CLI Docker Image

The Swagger Codegen image acts as a standalone executable. It can be used as an alternative to installing via homebrew, or for developers who are unable to install Java or upgrade the installed version.

To generate code with this image, you'll need to mount a local location as a volume.

Example:

docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli generate \
    -i http://petstore.swagger.io/v2/swagger.json \
    -l go \
    -o /local/out/go

(On Windows replace ${PWD} with %CD%)

The generated code will be located under ./out/go in the current directory.

⁠Getting Started

To generate a PHP client for http://petstore.swagger.io/v2/swagger.json⁠, please run the following

git clone https://github.com/swagger-api/swagger-codegen
cd swagger-codegen
mvn clean package
java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
   -i http://petstore.swagger.io/v2/swagger.json \
   -l php \
   -o /var/tmp/php_api_client

(if you're on Windows, replace the last command with java -jar modules\swagger-codegen-cli\target\swagger-codegen-cli.jar generate -i http://petstore.swagger.io/v2/swagger.json -l php -o c:\temp\php_api_client)

You can also download the JAR (latest release) directly from maven.org⁠

To get a list of general options available, please run java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar help generate

To get a list of PHP specified options (which can be passed to the generator with a config file via the -c option), please run java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar config-help -l php

⁠Generators

⁠To generate a sample client library

You can build a client against the swagger sample petstore⁠ API as follows:

./bin/java-petstore.sh

(On Windows, run .\bin\windows\java-petstore.bat instead)

This will run the generator with this command:

java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
  -i http://petstore.swagger.io/v2/swagger.json \
  -l java \
  -o samples/client/petstore/java

with a number of options. You can get the options with the help generate command (below only shows partial results):

NAME
        swagger-codegen-cli generate - Generate code with chosen lang

SYNOPSIS
        swagger-codegen-cli generate
                [(-a <authorization> | --auth <authorization>)]
                [--additional-properties <additional properties>...]
                [--api-package <api package>] [--artifact-id <artifact id>]
                [--artifact-version <artifact version>]
                [(-c <configuration file> | --config <configuration file>)]
                [-D <system properties>...] [--git-repo-id <git repo id>]
                [--git-user-id <git user id>] [--group-id <group id>]
                [--http-user-agent <http user agent>]
                (-i <spec file> | --input-spec <spec file>)
                [--ignore-file-override <ignore file override location>]
                [--import-mappings <import mappings>...]
                [--instantiation-types <instantiation types>...]
                [--invoker-package <invoker package>]
                (-l <language> | --lang <language>)
                [--language-specific-primitives <language specific primitives>...]
                [--library <library>] [--model-name-prefix <model name prefix>]
                [--model-name-suffix <model name suffix>]
                [--model-package <model package>]
                [(-o <output directory> | --output <output directory>)]
                [--release-note <release note>] [--remove-operation-id-prefix]
                [--reserved-words-mappings <reserved word mappings>...]
                [(-s | --skip-overwrite)]
                [(-t <template directory> | --template-dir <template directory>)]
                [--type-mappings <type mappings>...] [(-v | --verbose)]

OPTIONS
        -a <authorization>, --auth <authorization>
            adds authorization headers when fetching the swagger definitions
            remotely. Pass in a URL-encoded string of name:header with a comma
            separating multiple values

...... (results omitted)

        -v, --verbose
            verbose mode

You can then compile and run the client, as well as unit tests against it:

cd samples/client/petstore/java
mvn package

Other languages have petstore samples, too:

./bin/android-petstore.sh
./bin/java-petstore.sh
./bin/objc-petstore.sh

⁠Generating libraries from your server

It's just as easy--just use the -i flag to point to either a server or file.

⁠Modifying the client library format

Don't like the default swagger client syntax? Want a different language supported? No problem! Swagger codegen processes mustache templates with the jmustache⁠ engine. You can modify our templates or make your own.

You can look at modules/swagger-codegen/src/main/resources/${your-language} for examples. To make your own templates, create your own files and use the -t flag to specify your template folder. It actually is that easy.

⁠Making your own codegen modules

If you're starting a project with a new language and don't see what you need, swagger-codegen can help you create a project to generate your own libraries:

java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar meta \
  -o output/myLibrary -n myClientCodegen -p com.my.company.codegen

This will write, in the folder output/myLibrary, all the files you need to get started, including a `README.md. Once modified and compiled, you can load your library with the codegen and generate clients with your own, custom-rolled logic.

You would then compile your library in the output/myLibrary folder with mvn package and execute the codegen like such:

java -cp output/myLibrary/target/myClientCodegen-swagger-codegen-1.0.0.jar:modules/swagger-codegen-cli/target/swagger-codegen-cli.jar io.swagger.codegen.SwaggerCodegen

For Windows users, you will need to use ; instead of : in the classpath, e.g.

java -cp output/myLibrary/target/myClientCodegen-swagger-codegen-1.0.0.jar;modules/swagger-codegen-cli/target/swagger-codegen-cli.jar io.swagger.codegen.SwaggerCodegen

Note the myClientCodegen is an option now, and you can use the usual arguments for generating your library:

java -cp output/myLibrary/target/myClientCodegen-swagger-codegen-1.0.0.jar:modules/swagger-codegen-cli/target/swagger-codegen-cli.jar \
  io.swagger.codegen.SwaggerCodegen generate -l myClientCodegen\
  -i http://petstore.swagger.io/v2/swagger.json \
  -o myClient

⁠Where is Javascript???

See our javascript library⁠--it's completely dynamic and doesn't require static code generation. There is a third-party component called swagger-js-codegen⁠ that can generate angularjs or nodejs source code from a OpenAPI Specification.

:exclamation: On Dec 7th 2015, a Javascript API client generator has been added by @jfiala.

⁠Generating a client from local files

If you don't want to call your server, you can save the OpenAPI Spec files into a directory and pass an argument to the code generator like this:

-i ./modules/swagger-codegen/src/test/resources/2_0/petstore.json

Great for creating libraries on your ci server, from the Swagger Editor⁠... or while coding on an airplane.

⁠Selective generation

You may not want to generate all models in your project. Likewise you may want just one or two apis to be written. If that's the case, you can use system properties to control the output:

The default is generate everything supported by the specific library. Once you enable a feature, it will restrict the contents generated:

# generate only models
java -Dmodels {opts}

# generate only apis
java -Dapis {opts}

# generate only supporting files
java -DsupportingFiles

# generate models and supporting files
java -Dmodels -DsupportingFiles

To control the specific files being generated, you can pass a CSV list of what you want:

# generate the User and Pet models only
-Dmodels=User,Pet

# generate the User model and the supportingFile `StringUtil.java`:
-Dmodels=User -DsupportingFiles=StringUtil.java

To control generation of docs and tests for api and models, pass false to the option. For api, these options are -DapiTests=false and -DapiDocs=false. For models, -DmodelTests=false and -DmodelDocs=false. These options default to true and don't limit the generation of the feature options listed above (like -Dapi):

# generate only models (with tests and documentation)
java -Dmodels {opts}

# generate only models (with tests but no documentation)
java -Dmodels -DmodelDocs=false {opts}

# generate only User and Pet models (no tests and no documentation)
java -Dmodels=User,Pet -DmodelTests=false {opts}

# generate only apis (without tests)
java -Dapis -DapiTests=false {opts}

# generate only apis (modelTests option is ignored)
java -Dapis -DmodelTests=false {opts}

When using selective generation, only the templates needed for the specific generation will be used.

⁠Ignore file format

Swagger codegen supports a .swagger-codegen-ignore file, similar to .gitignore or .dockerignore you're probably already familiar with.

The ignore file allows for better control over overwriting existing files than the --skip-overwrite flag. With the ignore file, you can specify individual files or directories can be ignored. This can be useful, for example if you only want a subset of the generated code.

Examples:

# Swagger Codegen Ignore
# Lines beginning with a # are comments

# This should match build.sh located anywhere.
build.sh

# Matches build.sh in the root
/build.sh

# Exclude all recursively
docs/**

# Explicitly allow files excluded by other rules
!docs/UserApi.md

# Recursively exclude directories named Api
# You can't negate files below this directory.
src/**/Api/

# When this file is nested under /Api (excluded above),
# this rule is ignored because parent directory is excluded by previous rule.
!src/**/PetApiTests.cs

# Exclude a single, nested file explicitly
src/IO.Swagger.Test/Model/AnimalFarmTests.cs

The .swagger-codegen-ignore file must exist in the root of the output directory.

Upon first code generation, you may also pass the CLI option --ignore-file-override=/path/to/ignore_file for greater control over generated outputs. Note that this is a complete override, and will override the .swagger-codegen-ignore file in an output directory when regenerating code.

Editor support for .swagger-codegen-ignore files is available in IntelliJ via the [.ignore plugin](htt