var express = require('express')
var proxy = require('http-proxy-middleware')
// proxy middleware options
var options = {
target: 'http://www.example.org', // target host
changeOrigin: true, // needed for virtual hosted sites
ws: true, // proxy websockets
pathRewrite: {
'^/api/old-path': '/api/new-path', // rewrite path
'^/api/remove/path': '/path' // remove base path
},
router: {
// when request.headers.host == 'dev.localhost:3000',
// override target 'http://www.example.org' to 'http://localhost:8000'
'dev.localhost:3000': 'http://localhost:8000'
}
}
// create the proxy (without context)
var exampleProxy = proxy(options)
// mount `exampleProxy` in web server
var app = express()
app.use('/api', exampleProxy)
app.listen(3000)
Context matching
path matching
proxy({…}) - matches any path, all requests will be proxied. proxy(’/’, {…}) - matches any path, all requests will be proxied. proxy(’/api’, {…}) - matches paths starting with /api multiple path matching
proxy(['/api', '/ajax', '/someotherpath'], {...}) wildcard path
matching
proxy(’’, {…}) matches any path, all requests will be proxied. proxy(’/.html’, {…}) matches any path which ends with .html proxy(’/.html’, {…}) matches paths directly under path-absolute proxy(’/api//*.html’, {…}) matches requests ending with .html in the path of /api proxy([’/api/’, ‘/ajax/’], {…}) combine multiple patterns proxy([’/api/’, ‘!**/bad.json’], {…}) exclusion
Note: In multiple path matching, you cannot use string paths and wildcard paths together.
Router
option.router：对象/函数，重新定位特定请求的option.target。
// Use `host` and/or `path` to match requests. First match will be used.
// The order of the configuration matters.
router: {
'integration.localhost:3000' : 'http://localhost:8001', // host only
'staging.localhost:3000' : 'http://localhost:8002', // host only
'localhost:3000/api' : 'http://localhost:8003', // host + path
'/rest' : 'http://localhost:8004' // path only
}
// Custom router function
router: function(req) {
return 'http://localhost:8004';
}
custom matching
/**
* @return {Boolean}
*/
var filter = function(pathname, req) {
return pathname.match('^/api') && req.method === 'GET'
}
var apiProxy = proxy(filter, { target: 'http://www.example.org' })
