nodejs请求json数据

const http = require('http')

http.get('http://nodejs.org/dist/index.json', (res) => {

const { statusCode } = res;

const contentType = res.headers['content-type'];

 

let error;

if (statusCode !== 200) {

error = new Error('请求失败。\n' +

`状态码: ${statusCode}`);

} else if (!/^application\/json/.test(contentType)) {

error = new Error('无效的 content-type.\n' +

`期望 application/json 但获取的是 ${contentType}`);

}

if (error) {

console.error(error.message);

// 消耗响应数据以释放内存

res.resume();

return;

}

 

res.setEncoding('utf8');

let rawData = '';

res.on('data', (chunk) => { rawData += chunk; });

res.on('end', () => {

try {

const parsedData = JSON.parse(rawData);

console.log(parsedData);

} catch (e) {

console.error(e.message);

}

});

}).on('error', (e) => {

console.error(`错误: ${e.message}`);

});