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test(proxy): cover CONNECT 407 with socket-close reconnection #40866

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test(proxy): cover CONNECT 407 with socket-close reconnection #40866

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test(proxy): cover CONNECT 407 with socket-close reconnection
yury-s May 11, 2026
8b9a874
test(proxy): use proxyServer fixture in CONNECT 407 reconnect test
yury-s May 15, 2026
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29 changes: 29 additions & 0 deletions tests/library/proxy.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,35 @@ it('should authenticate', async ({ browserType, server }) => {
await browser.close();
});

it('should reconnect with credentials after CONNECT 407 closes the socket', {
annotation: { type: 'issue', description: 'https://github.com/microsoft/playwright/issues/40768' }
}, async ({ browserType, httpsServer, proxyServer }) => {
// Some HTTP proxies send 407 and close the socket on the first CONNECT, expecting
// the client to reconnect on a new TCP connection with Proxy-Authorization.
httpsServer.setRoute('/target.html', async (req, res) => {
res.end('<html><title>Served by https server via proxy</title></html>');
});
proxyServer.forwardTo(httpsServer.PORT, { allowConnectRequests: true });

const connectAttempts: { hadAuth: boolean }[] = [];
proxyServer.setAuthHandler(req => {
if (req.method === 'CONNECT')
connectAttempts.push({ hadAuth: !!req.headers['proxy-authorization'] });
return !!req.headers['proxy-authorization'];
});

const browser = await browserType.launch({
proxy: { server: proxyServer.HOST, username: 'user', password: 'secret' },
});
const page = await browser.newPage({ ignoreHTTPSErrors: true });
await page.goto('https://non-existent.com/target.html');
expect(await page.title()).toBe('Served by https server via proxy');
expect(connectAttempts.length).toBeGreaterThanOrEqual(2);
expect(connectAttempts[0].hadAuth).toBe(false);
expect(connectAttempts.some(a => a.hadAuth)).toBe(true);
await browser.close();
});

it('should work with authenticate followed by redirect', async ({ browserName, browserType, server }) => {
function hasAuth(req, res) {
const auth = req.headers['proxy-authorization'];
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