如何使用NodeJS从Yelp Fusion API获取访问令牌

问题描述：

我正在尝试获取Yelp API的访问令牌。如何使用NodeJS从Yelp Fusion API获取访问令牌

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

我一直运行到下面的错误在我的终端：

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

这里是我的NodeJS代码（我花了很多的从节点文档站点）：

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();

答

两个项目，引起了我的注意：

分隔主机名和选项变量中的路径。

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

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