使用node.js調用webservice時出錯？

Question

你能告訴我如何調用json webservice並獲取輸​​出嗎？我需要一些步驟來完成這個任務。 我剛剛開始使用node.js. 我創建使用命令js文件PROMT我運行該文件

var request = require("request"); 
request.get("http://ergast.com/api/f1/current/last/results.json", function (err, res, body) { 
    if (!err) { 
     var resultsObj = JSON.parse(body); 
     //Just an example of how to access properties: 
     console.log(resultsObj.MRData); 
    } 
}); 


    Microsoft Windows XP [Version 5.1.2600] 
(C) Copyright 1985-2001 Microsoft Corp. 

C:\Documents and Settings\nksharma.Q3TECH>cd.. 

C:\Documents and Settings>cd.. 

C:\>cd node 

C:\node>npm install request 
npm http GET https://registry.npmjs.org/request 
npm http 304 https://registry.npmjs.org/request 
npm http GET https://registry.npmjs.org/json-stringify-safe 
npm http GET https://registry.npmjs.org/qs 
npm http GET https://registry.npmjs.org/forever-agent 
npm http GET https://registry.npmjs.org/node-uuid 
npm http GET https://registry.npmjs.org/tough-cookie 
npm http GET https://registry.npmjs.org/form-data 
npm http GET https://registry.npmjs.org/oauth-sign 
npm http GET https://registry.npmjs.org/http-signature 
npm http GET https://registry.npmjs.org/mime 
npm http GET https://registry.npmjs.org/tunnel-agent 
npm http GET https://registry.npmjs.org/hawk 
npm http GET https://registry.npmjs.org/aws-sign2 
npm http 304 https://registry.npmjs.org/forever-agent 
npm http 304 https://registry.npmjs.org/node-uuid 
npm http 304 https://registry.npmjs.org/tough-cookie 
npm http 304 https://registry.npmjs.org/form-data 
npm http 304 https://registry.npmjs.org/oauth-sign 
npm http 304 https://registry.npmjs.org/http-signature 
npm http 304 https://registry.npmjs.org/mime 
npm http 304 https://registry.npmjs.org/tunnel-agent 
npm http 304 https://registry.npmjs.org/hawk 
npm http 304 https://registry.npmjs.org/aws-sign2 
npm http 304 https://registry.npmjs.org/json-stringify-safe 
npm http 304 https://registry.npmjs.org/qs 
npm http GET https://registry.npmjs.org/combined-stream 
npm http GET https://registry.npmjs.org/async 
npm http GET https://registry.npmjs.org/asn1/0.1.11 
npm http GET https://registry.npmjs.org/assert-plus/0.1.2 
npm http GET https://registry.npmjs.org/ctype/0.5.2 
npm http GET https://registry.npmjs.org/punycode 
npm http GET https://registry.npmjs.org/sntp 
npm http GET https://registry.npmjs.org/boom 
npm http GET https://registry.npmjs.org/cryptiles 
npm http GET https://registry.npmjs.org/hoek 
npm http 304 https://registry.npmjs.org/async 
npm http 304 https://registry.npmjs.org/asn1/0.1.11 
npm http 304 https://registry.npmjs.org/ctype/0.5.2 
npm http 304 https://registry.npmjs.org/assert-plus/0.1.2 
npm http 304 https://registry.npmjs.org/punycode 
npm http 304 https://registry.npmjs.org/sntp 
npm http 304 https://registry.npmjs.org/boom 
npm http 304 https://registry.npmjs.org/cryptiles 
npm http 304 https://registry.npmjs.org/hoek 
npm http 304 https://registry.npmjs.org/combined-stream 
npm http GET https://registry.npmjs.org/delayed-stream/0.0.5 
npm http 304 https://registry.npmjs.org/delayed-stream/0.0.5 
request@2.29.0 node_modules\request 
├── forever-agent@0.5.0 
├── aws-sign2@0.5.0 
├── json-stringify-safe@5.0.0 
├── tunnel-agent@0.3.0 
├── oauth-sign@0.3.0 
├── qs@0.6.6 
├── mime@1.2.11 
├── node-uuid@1.4.1 
├── tough-cookie@0.9.15 (punycode@1.2.3) 
├── hawk@1.0.0 (cryptiles@0.2.2, sntp@0.2.4, boom@0.4.2, hoek@0.9.1) 
├── http-signature@0.10.0 (assert-plus@0.1.2, asn1@0.1.11, ctype@0.5.2) 
└── form-data@0.1.2 (async@0.2.9, combined-stream@0.0.4) 

C:\node>node b.js 
{ xmlns: 'http://ergast.com/mrd/1.2', 
    series: 'f1', 
    url: 'http://ergast.com/api/f1/current/last/results.json', 
    limit: '30', 
    offset: '0', 
    total: '22', 
    RaceTable: { season: '2013', round: '19', Races: [ [Object] ] } } 

C:\node> 

Answer 1

我想你沒有安裝請求模塊，但你要使用它。導航到項目文件夾在您的控制檯，並安裝請求模塊：

npm install request 

然後再次嘗試時，找不到模塊的錯誤應該消失。