Question

我正在尝试获取Yelp API的访问令牌。

Yelp的API文档： https://www.yelp.com/developers/documentation/v3/get_started

我一直在终端上遇到错误：

problem with request: getaddrinfo ENOTFOUND api.yelp.com/oauth2/token api.yelp.com/oauth2/token:80

这是我的NodeJS代码（我从节点文档站点中获取了很多代码）：

var http = require("http");

var postData = JSON.stringify({
        "grant_type": "client_credentials",
        "client_id": "<<client id>>",
        "client_secret": "<<client secret no.>>"
      });

var options = {
  hostname: 'api.yelp.com/oauth2/token',
  port: 80,
  method: 'POST',
  headers: {
    'Content-Type': 'application/x-www-form-urlencoded',
    'Content-Length': Buffer.byteLength(postData)
  }
};

var req = http.request(options, (res) => {
  console.log(`STATUS: ${res.statusCode}`);
  console.log(`HEADERS: ${JSON.stringify(res.headers)}`);
  res.setEncoding('utf8');
  res.on('data', (chunk) => {
    console.log(`BODY: ${chunk}`);
  });
  res.on('end', () => {
    console.log('No more data in response.');
  });
});

req.on('error', (e) => {
  console.log(`problem with request: ${e.message}`);
});

// write data to request body
req.write(postData);
req.end();

Answer 1

引起我注意的两件事：

在选项变量中分隔主机名和路径。

YELP Fusion API是HTTPS，而不是HTTP。使用HTTP可能会导致302响应（URL重定向）。

var https = require('https');

getYelpAccessCode(function(response) {
    var responseData = JSON.parse(response);
    if (responseData != null) {
        var accessCode = responseData.token_type + " " + responseData.access_token;
    }
});

function getYelpAccessCode(callback) {
const postData = querystring.stringify({
    'client_id': YELP_CLIENT_ID,
    'client_secret': YELP_CLIENT_SECRET
    });

const options = {
        hostname: 'api.yelp.com',
        path: '/oauth2/token',
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Content-Length': Buffer.byteLength(postData)
        }
    };

const req = https.request(options, (res) => {
        console.log(`STATUS: ${res.statusCode}`);
        console.log(`HEADERS: ${JSON.stringify(res.headers)}`);

        var body = '';

        res.setEncoding('utf8');
        res.on('data', (chunk) => {
            body += chunk;
            console.log(`BODY: ${chunk}`);
        });
        res.on('end', () => {
            console.log('No more data in response.');
            callback(body);
        });
    });

req.on('error', (e) => {
    console.error(`problem with request: ${e.message}`);
});

// write data to request body
req.write(postData);
req.end();
}

如何使用NodeJS从{Yelp Fusion API}获取访问令牌

1 个答案: