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'use strict'; const common = require('../common'); if (!common.hasCrypto) common.skip('missing crypto'); const assert = require('assert'); const h2 = require('http2'); // Http2ServerResponse.writeHead should override previous headers const server = h2.createServer(); server.listen(0, common.mustCall(function() { const port = server.address().port; server.once('request', common.mustCall(function(request, response) { response.setHeader('foo-bar', 'def456'); // Override const returnVal = response.writeHead(418, { 'foo-bar': 'abc123' }); assert.strictEqual(returnVal, response); assert.throws(() => { response.writeHead(300); }, { code: 'ERR_HTTP2_HEADERS_SENT' }); response.on('finish', common.mustCall(function() { server.close(); process.nextTick(common.mustCall(() => { // The stream is invalid at this point, // and this line verifies this does not throw. response.writeHead(300); })); })); response.end(); })); const url = `http://localhost:${port}`; const client = h2.connect(url, common.mustCall(function() { const headers = { ':path': '/', ':method': 'GET', ':scheme': 'http', ':authority': `localhost:${port}` }; const request = client.request(headers); request.on('response', common.mustCall(function(headers) { assert.strictEqual(headers['foo-bar'], 'abc123'); assert.strictEqual(headers[':status'], 418); }, 1)); request.on('end', common.mustCall(function() { client.close(); })); request.end(); request.resume(); })); }));