How to store Configuration file and read it using

问题:

I am new on react.js I have implemented one component in which I am fetching the data from server and use it like,

CallEnterprise:function(TenantId){


    fetchData('http://xxx.xxx.xx.xx:8090/Enterprises?TenantId='+TenantId+' &format=json').then(function(enterprises) 
    {
        EnterprisePerspectiveActions.getEnterprise(enterprises);
    }).catch(function()
    {
        alert("There was some issue in API Call please contact Admin");
        //ComponentAppDispatcher.handleViewAction({
        //    actionType: MetaItemConstants.RECEIVE_ERROR,
        //    error: 'There was a problem getting the enterprises'
        //});
    });
},

I want to store Url in configuration file so when I deployed this on Testing server or on Production I have to just change the url on config file not in js file but I don't know how to use configuration file in react.js

Can anyone please guide me how can I achieve this ?

回答1:

With webpack you can put env-specific config into the externals field in webpack.config.js

externals: {
  'Config': JSON.stringify(process.env.NODE_ENV === 'production' ? {
    serverUrl: "https://myserver.com"
  } : {
    serverUrl: "http://localhost:8090"
  })
}

If you want to store the configs in a separate JSON file, that's possible too, you can require that file and assign to Config:

externals: {
  'Config': JSON.stringify(production ? require('./config.prod.json') : require('./config.dev.json'))
}

Then in your modules, you can use the config:

var Config = require('Config')
fetchData(Config.serverUrl + '/Enterprises/...')

Not sure if it covers your use case but it's been working pretty well for us.

回答2:

If you used Create React App, you can set an environment variable using a .env file. The documentation is here:

https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#adding-development-environment-variables-in-env

Basically do something like this in the .env file at the project root.

REACT_APP_SECRET_CODE=abcdef

You can access it from your component with

process.env.REACT_APP_SECRET_CODE

回答3:

You can use the dotenv package no matter what setup you use. It allows you to create a .env in your project root and specify your keys like so

SERVER_PORT=8000

In your applications entry file your just call dotenv(); before accessing the keys like so

process.env.SERVER_PORT

回答4:

In case you have a .properties file or a .ini file

Actually in case if you have any file that has key value pairs like this:

someKey=someValue
someOtherKey=someOtherValue

You can import that into webpack by a npm module called properties-reader

I found this really helpful since I'm integrating react with Java Spring framework where there is already an application.properties file. This helps me to keep all config together in one place.

1. Import that from dependencies section in package.json

"properties-reader": "0.0.16"

2. Import this module into webpack.config.js on top

const PropertiesReader = require('properties-reader');

3. Read the properties file

const appProperties = PropertiesReader('Path/to/your/properties.file')._properties;

4. Import this constant as config

externals: { 'Config': JSON.stringify(appProperties) }

5. Use it as the same way as mentioned in the accepted answer

var Config = require('Config') fetchData(Config.serverUrl + '/Enterprises/...')