ELRIWebSystem/Learning/vue/webpack/docs/proxy.md

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# API Proxying During Development
When integrating this boilerplate with an existing backend, a common need is to access the backend API when using the dev server. To achieve that, we can run the dev server and the API backend side-by-side (or remotely), and let the dev server proxy all API requests to the actual backend.
To configure the proxy rules, edit `dev.proxyTable` option in `config/index.js`. The dev server is using [http-proxy-middleware](https://github.com/chimurai/http-proxy-middleware) for proxying, so you should refer to its docs for detailed usage. But here's a simple example:
``` js
// config/index.js
module.exports = {
// ...
dev: {
proxyTable: {
// proxy all requests starting with /api to jsonplaceholder
'/api': {
target: 'http://jsonplaceholder.typicode.com',
changeOrigin: true,
pathRewrite: {
'^/api': ''
}
}
}
}
}
```
The above example will proxy the request `/api/posts/1` to `http://jsonplaceholder.typicode.com/posts/1`.
## URL Matching
In addition to static urls you can also use glob patterns to match URLs, e.g. `/api/**`. See [Context Matching](https://github.com/chimurai/http-proxy-middleware#context-matching) for more details. In addition, you can provide a `filter` option that can be a custom function to determine whether a request should be proxied:
``` js
proxyTable: {
'**': {
target: 'http://jsonplaceholder.typicode.com',
filter: function (pathname, req) {
return pathname.match('^/api') && req.method === 'GET'
}
}
}
```