mirror of https://github.com/Lissy93/dashy.git
48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
/**
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* A simple CORS proxy, for accessing API services which aren't CORS-enabled.
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* Receives requests from frontend, applies correct access control headers,
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* makes request to endpoint, then responds to the frontend with the response
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*/
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const axios = require('axios');
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module.exports = (req, res) => {
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// Apply allow-all response headers
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res.header('Access-Control-Allow-Origin', '*');
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res.header('Access-Control-Allow-Methods', 'GET, PUT, PATCH, POST, DELETE');
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if (req.header('access-control-request-headers')) {
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res.header('Access-Control-Allow-Headers', req.header('access-control-request-headers'));
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}
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// Pre-flight
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if (req.method === 'OPTIONS') {
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res.send();
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return;
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}
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// Get desired URL, from Target-URL header
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const targetURL = req.header('Target-URL');
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if (!targetURL) {
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res.status(500).send({ error: 'There is no Target-Endpoint header in the request' });
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return;
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}
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// Apply any custom headers, if needed
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const headers = req.header('CustomHeaders') ? JSON.parse(req.header('CustomHeaders')) : {};
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// Prepare the request
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const requestConfig = {
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method: req.method,
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url: targetURL,
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json: req.body,
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headers,
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};
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// Make the request, and respond with result
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axios.request(requestConfig)
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.then((response) => {
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res.status(200).send(response.data);
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}).catch((error) => {
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res.status(500).send({ error });
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});
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};
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