mock-server

For front-end developers who need a quick back-end for mock data.

README: English | 简体中文

Features

• mock data
• mock file download
• Matching by request URL and method
• Custom Response delay, status and headers
• Support third-party simulation data lib, like Mock.js and Faker.js

Install

npm install -g @middlend/mock-server

Usage

1. Write mock data in source directory

data/user.js

module.exports = [{
    request: {
        url: '/user/:id'
    },
    response: {
        body: {
            id: 123,
            name: 'Stephen',
            age: 30
        }
    }
}];

2. Start mock server

mock-server ./data

3. Request URL

http://localhost:3000/user/1

CLI

mock-server [options] <source>

Options:
  --config, -c       Path to config file
  --host, -H         Set host                             [default: "localhost"]
  --port, -p         Set port                                    [default: 3000]
  --watch, -w        Watch file(s)                                     [boolean]
  --static, -s       Set static(download) files directory

Config

Data format

You could add any js file or folder to source directory. Nested files are supported and use DFS.

{
    // 'request' is use for matching response data
    request: {
        // 'url' is use for compare request url.
        url: '/xxx/xxx',        // require
        // 'method' is use for compare request method.
        method: 'get',          // optional
        protocol: 'http'        // optional
    },
    // 'response' is use for set response data
    response: {             // require
        // 'delay' is use for delay response time.
        delay: 0,           // default
        // 'status' is use for delay response time.
        status: 200,        // default
        // 'headers' use for set response header. default to below.
        headers: {          // default
            'Content-Type': 'application/json; charset=UTF-8',
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Headers': 'Origin, X-Requested-With, Content-Type, Accept'
        },
        // 'body' is use for set response body, string, object and array are supported, if type to String and end with '.xxx' means this is a file path and root path is by --static argument, you can change it in default setting with "staticPath" option.
        body: {             // require
            ...
        }
    }
}

Default Settings

You could configure default setting in config file.

mock-server ./data --config=mock.config.js

mock.config.js

var path = require('path');

module.exports = {
    host: 'localhost',          // default
    port: 3000,                 // default
    watch: false,               // default
    // search order with mock data files.
    searchOrder(filenames) {
        return filenames.sort();    // default
    },
    // global response settings
    response: {
        // will merge to your specific response headers.
        headers: {                      // default
            'Content-Type': 'application/json; charset=UTF-8',
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Headers': 'Origin, X-Requested-With, Content-Type, Accept'
        }
    }
}

Routes

There are three pattern to match request url.

{
    request: {
        // matches /user/stephen and /user/ricky
        url: '/user/:name',
        // matches /files/hello.jpg and /files/world.png
        url: '/files/*.*',  
        // matches /files/hello.jpg and /files/path/to/world.jpg
        url: '/**/*.jpg'
    },
    ...
}

Example

Mock data

GET http://localhost:3000/user/list

module.exports = [{
    request: {
        url: '/user/list',
        method: 'get'
    },
    response: {
        delay: 2000,
        body: [{
            id: 123,
            name: 'Stephen',
            age: 30
        }, {
            id: 124,
            name: 'Ricky',
            age: 20
        }]
    }
}];

mock-server ./data

Mock file download

POST http://localhost:3000/download/sample ./data

module.exports = [{
    request: {
        url: '/download/:filename',
        method: 'get'
    },
    response: {
        delay: 1000,
        headers: {
            'Content-Type': 'text/plain',
            'Content-Disposition': 'attachment;filename=sample.txt;'
        },
        body: '<static>/sample.txt'      // store download file sample.txt to static directory(use --static argument to set).
    }
}];

mock-server ./data --static=./static

Work with Mock.js

npm i mockjs

GET http://localhost:3000/user/list

var Mock = require('mockjs');

module.exports = [{
    request: {
        url: '/user/list',
        method: 'get'
    },
    response: {
        body: Mock.mock({
            'data|20': [{
                id: '@integer(0, 10000)',
                name: '@name',
                email: '@email'
            }]
        }).data
    }
}];

Mock.js API

Work with Faker.js

npm i faker

GET http://localhost:3000/user/123

var faker = require('faker');

module.exports = [{
    request: {
        url: '/user/:id',
        method: 'get'
    },
    response: {
        body: {
            id: faker.random.uuid(),
            name: faker.name.findName(),
            email: faker.internet.email()
        }
    }
}];

Faker.js API