How to configure proxy in Vite? - http-proxy

Question

I was trying to follow the docs and created vite.config.js like this:
const config = {
outDir: '../wwwroot/',
proxy: {
// string shorthand
'/foo': 'http://localhost:4567',
// with options
'/api': {
target: 'http://jsonplaceholder.typicode.com',
changeOrigin: true,
rewrite: path => path.replace(/^\/api/, '')
}
}
};
export default config;
And tried to test it with following calls:
fetch('/foo');
fetch('/api/test/get');
I was expecting to have actual requests as http://localhost:4567/foo and http://jsonplaceholder.typicode.com/test/get
But both of them had my dev server as an origin like this: http://localhost:3000/foo and http://localhost:3000/api/test/get
Did I misunderstand it? How proxies should work?
I also created an issue in the Vite repo but it was closed and I did not understand the closing comment.

Answer 1

Turns out it's needed to specify secure flag to false like this:
proxy: {
'/api': {
target: 'https://localhost:44305',
changeOrigin: true,
secure: false,
ws: true,
}
}
Related github issue

Answer 2

Based on the Vite Config you need to specify it via server -> proxy inside vite.config.js:
export default defineConfig({
server: {
proxy: {
"/api": {
target: "https://your-remote-domain.com",
changeOrigin: true,
secure: false,
},
},
},
// some other configuration
})

Answer 3

For debugging I highly recommend to add event listeners to the proxy, so you can see how the requests are transformed, if they hit the target server, and what is returned.
proxy: {
'/api': {
target: 'https://localhost:44305',
changeOrigin: true,
secure: false,
ws: true,
configure: (proxy, _options) => {
proxy.on('error', (err, _req, _res) => {
console.log('proxy error', err);
});
proxy.on('proxyReq', (proxyReq, req, _res) => {
console.log('Sending Request to the Target:', req.method, req.url);
});
proxy.on('proxyRes', (proxyRes, req, _res) => {
console.log('Received Response from the Target:', proxyRes.statusCode, req.url);
});
},
}
}
proxy will be an instance of 'http-proxy',
Please see for further info https://github.com/http-party/node-http-proxy#options