When implementing HTTP clients with proxy support, ensure the connection to the proxy uses the protocol specified in the proxy configuration (not the request protocol). This is crucial for scenarios like accessing HTTPS resources through an HTTP proxy.
When implementing HTTP clients with proxy support, ensure the connection to the proxy uses the protocol specified in the proxy configuration (not the request protocol). This is crucial for scenarios like accessing HTTPS resources through an HTTP proxy.
Key implementation guidelines:
hostname property (not host)function configureProxy(options, config) {
// Check for explicitly configured proxy
let proxy = config.proxy;
if (!proxy) {
// Check for environment variables
const proxyEnv = parsed.protocol.slice(0, -1) + '_proxy';
const proxyUrl = process.env[proxyEnv] ||
process.env[proxyEnv.toUpperCase()] ||
process.env.all_proxy ||
process.env.ALL_PROXY;
if (proxyUrl) {
const parsedProxyUrl = url.parse(proxyUrl);
proxy = {
host: parsedProxyUrl.hostname, // Use hostname, not host (which includes port)
port: parsedProxyUrl.port,
protocol: parsedProxyUrl.protocol
};
// Handle proxy authentication if present
if (parsedProxyUrl.auth) {
// Configure proxy authentication
}
}
}
if (proxy) {
// Use proxy's protocol for connection to proxy
// Set up tunneling for HTTPS requests through HTTP proxy
const usesTunnel = proxy.protocol === "http:" && options.protocol === "https:";
if (usesTunnel) {
// Configure HTTP CONNECT tunneling
}
}
return options;
}