response.setHeader(name, value)

• name <string>
• value 字符串|字符串数组

为隐式头设置单个头值。如果该头在即将发送的头中已经存在，其值将被替换。这里使用字符串数组可以发送多个具有相同名称的头。

【Sets a single header value for implicit headers. If this header already exists in the to-be-sent headers, its value will be replaced. Use an array of strings here to send multiple headers with the same name.】

response.setHeader('Content-Type', 'text/html; charset=utf-8'); 拷贝

或者

【or】

response.setHeader('Set-Cookie', ['type=ninja', 'language=javascript']); 拷贝

尝试设置包含无效字符的头字段名称或值将导致抛出 TypeError。

【Attempting to set a header field name or value that contains invalid characters will result in a TypeError being thrown.】

当使用 response.setHeader() 设置了头部时，它们将与传递给 response.writeHead() 的任何头部合并，而传递给 response.writeHead() 的头部优先。

【When headers have been set with response.setHeader(), they will be merged with any headers passed to response.writeHead(), with the headers passed to response.writeHead() given precedence.】

// Returns content-type = text/plain
const server = http2.createServer((req, res) => {
  res.setHeader('Content-Type', 'text/html; charset=utf-8');
  res.setHeader('X-Foo', 'bar');
  res.writeHead(200, { 'Content-Type': 'text/plain; charset=utf-8' });
  res.end('ok');
}); 拷贝