Json Mock Api

Mock an api with plain json files. This simple CLI tool allows you to turn a folder of static json files into a mock api server.

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Table of Contents:

• Json Mock Api
  • Usage
  • Options
  • The Json files
  • Handling different HTTP Verbs
  • Custom middleware
  • Author
  • License

Usage

Without installing (using npx , shipped with npm@5.2.0 and higher)

npx json-mock-api --port 3000 --directory .

or

Add json-mock-api to your project ...

npm install --save json-mock-api

... then update your package.json ...

{
    "scripts": {
+       "mock": "json-mock-api --port 3000 --directory ."
    }
}

... and finally run the command

npm run mock

Options

Usage: json-mock-api [options]

Options:

  -v, --version             output the version number
  -c, --cors                Enable CORS on al requests
  -d, --directory [path]    Directory (default: .)
  -m, --middleware <files>  Expressjs middleware (default: )
  -p, --port [number]       Port (default: 3000)
  -h, --help                output usage information

Examples:

  $ json-mock-api --middleware ./middleware-1.js,./middleware-2.js

The Json files

Given this file structure:

.
└── api/
    ├── login.json
    ├── product/
    │   └── index.json
    ├── user/
    │   └── 1.json
    └── users.json

That results in the following endpoints:

http://localhost:3000/api/login
http://localhost:3000/api/products
http://localhost:3000/api/user/1
http://localhost:3000/api/users

Handling different HTTP Verbs

You can specify a HTTP Verb in the json file name like so:

.
└── api/
    └── user/
        ├── 1.json
        ├── 1.post.json
        └── 1.put.json

When you access the endpoint http://localhost:3000/api/user/1 via:

• a POST request, the file ./api/user/1.post.json is returned
• a PUT request, the file ./api/user/1.put.json is returned
• any other verb (GET, DELETE, ...), the file ./api/user/1.json is returned

Custom middleware

You can run your own ExpressJS middleware if you want to.

To load your own middleware, use the -m or --middleware flags:

json-mock-api --middlware ./middlware-1.js,./middleware-2.js

The above command will load the files middleware-1.js and middleware-2.js from the current working directory and use them in this order when a request is made before the response is send to the user.

You could use your own middleware to, for example, add authentication.

Author

Peter Goes (@petergoes) - petergoes.nl

License

MIT