Instructions for using the http.response.writeHead method in node.js_node.js

Method description:

Send response headers to the requesting client.

This function can only be called once in a request. If not called, a response header will be automatically generated.

Grammar:

Copy code The code is as follows:

response.writeHead(statusCode, [reasonPhrase], [headers])

Receive parameters:

statusCode HTTP status code, such as 200 (request successful), 404 (not found), etc.

reasonPhrase

headers An object similar to an associative array, representing each attribute of the response header

Example:

Copy code The code is as follows:

var body = 'hello world';
response.writeHead(200, {
'Content-Length': body.length,
'Content-Type': 'text/plain'
});