http-proxy-middleware option.onProxyReq:
'use strict';
var express = require('express');
var router = express.Router();
var proxy_filter = function (path, req) {
return path.match('^/docs') && ( req.method === 'GET' || req.method === 'POST' );
};
var proxy_options = {
target: 'http://localhost:8080',
pathRewrite: {
'^/docs' : '/java/rep/server1' // Host path & target path conversion
},
onError(err, req, res) {
res.writeHead(500, {
'Content-Type': 'text/plain'
});
res.end('Something went wrong. And we are reporting a custom error message.' + err);
},
onProxyReq(proxyReq, req, res) {
if ( req.method == "POST" && req.body ) {
// Add req.body logic here if needed....
// ....
// Remove body-parser body object from the request
if ( req.body ) delete req.body;
// Make any needed POST parameter changes
let body = new Object();
body.filename = 'reports/statistics/summary_2016.pdf';
body.routeid = 's003b012d002';
body.authid = 'bac02c1d-258a-4177-9da6-862580154960';
// URI encode JSON object
body = Object.keys( body ).map(function( key ) {
return encodeURIComponent( key ) + '=' + encodeURIComponent( body[ key ])
}).join('&');
// Update header
proxyReq.setHeader( 'content-type', 'application/x-www-form-urlencoded' );
proxyReq.setHeader( 'content-length', body.length );
// Write out body changes to the proxyReq stream
proxyReq.write( body );
proxyReq.end();
}
}
};
// Proxy configuration
var proxy = require( 'http-proxy-middleware' )( proxy_filter, proxy_options );
/* GET home page. */
router.get('/', function(req, res, next) {
res.render('index', { title: 'Node.js Express Proxy Test' });
});
router.all('/document', proxy );
module.exports = router;