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Node.js 返回 JSON 数据

request.end([data[, encoding]][, callback])

var http = require('http');

const log = console.log;

http.createServer(function (request, response) {
    // log(`pagehide event`, request)
    // log(`pagehide event`, request.headers)
    // log(`pagehide event`, request.rawHeaders)
    // log(`page visibility`, request)
    log(`page visibility`)
    // 发送 HTTP 头部 
    // HTTP 状态值: 200 : OK
    // 内容类型: text/plain
    // response.writeHead(200, {'Content-Type': 'text/plain'});
    response.writeHead(200, {'Content-Type': 'application/json'});

    // 发送响应数据 "Hello World"
    // response.end('Hello World
');
    response.end(JSON.stringify({
        name: "server",
        age: 2020,
    }));
    // .json
}).listen(8888);

// 终端打印如下信息
console.log('Server running at http://127.0.0.1:8888/');

https://nodejs.org/api/http.html#http_request_end_data_encoding_callback

https://nodejs.org/api/http.html#http_request_write_chunk_encoding_callback

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