Google+ Api获取用户电子邮件

Question

我正在使用Google+ API创建注册。将数据插入我的用户表时，我想获取用户的电子邮件。尝试这样做时出现错误。我的代码如下所示：

var API_KEY = 'A*****';   

plus.people.get({ 
    auth: API_KEY, 
    userId: req.body.userID 
}, function (err, user) { 
    if(err) { res.json(JSON.stringify(err)); return; } 
    console.log(user.emails); 

    User.find({ where:{ social_id:req.body.userID, type: 2 } }).then(existingUser =>{    
    if(existingUser) throw new Error('social_user_existing'); 
    if(!existingUser){ 
    User.build({ 
     username: user.displayName, 
     social_id : req.body.userID, 
     social_token :req.body.token, 
     type : 2 
     }).save();      
    }       
    }).then(function(new_g_user){     
     return res.json(rs.success({ username: user.displayName, user_id: user.id, jwt: new_g_user.getJwt() })); 
    }).catch(function(err){ 
     res.json(rs.errorCode(err.message)); 
    }); 
});  

我试图让与user.emails和user.emails用户的电子邮件[0] .value的拿到第一封电子邮件的至少价值。每次回应都是'未定义'。我提到user.kind是'plus#person'，而不是"plus#personOpenIdConnect"。这会导致我得到的回应吗？谢谢！

Answer 1

作为@Dalm如上所述，API密钥可用于访问公共数据。如果您想访问用户私人信息，则必须使用OAuth。

使用从googleapis的OAuth2类设置了验证：

const google = require('googleapis'); 
const OAuth2 = google.auth.OAuth2; 

const CREDENTIALS = require("./credentials.json"); 

var googleAuth = new OAuth2(
    CREDENTIALS.web.client_id, 
    CREDENTIALS.web.client_secret, 
    CREDENTIALS.web.redirect_uris[0] 
); 

credentials.json是你可以从你的谷歌应用程序（credentials节），其中包含应用程序键下载文件。

一旦你的访问令牌，你需要做的：

googleAuth.setCredentials({ 
    access_token: yourAccessToken 
}); 

最后，而不是使用auth: API_KEY你会做auth: googleAuth。

plus.people.get({ 
    auth: googleAuth, 
    userId: req.body.userID 
}, function (err, user) { 
    if(err) { res.json(JSON.stringify(err)); return; } 
    console.log(user.emails); 
}); 

如果一切顺利，您应该可以从用户那里获得隐私信息。

请注意，要访问电子邮件，您需要https://www.googleapis.com/auth/userinfo.email范围。

---

为了获得用于测试的访问令牌，您可以使用OAuth的游乐场：

1. 打开https://developers.google.com/oauthplayground/

2. 输入你所需要的授权范围，然后点击蓝色的按钮：

   

   这将使几个重定向。

3. 在步骤2再次点击蓝色按钮将授权码交换为访问令牌。

而现在，你会在屏幕的右侧看到您的access_token：

{ 
    "access_token": "ya29.G....OEDi", 
    "token_type": "Bearer", 
    "expires_in": 3600, 
    "refresh_token": "....hLA", 
    "id_token": ".....B1LGce02PMQHig" 
} 

你可以使用它进行测试。在您的应用中实施OAuth2时，您需要按照OAuth2协议规则设置重定向。

Answer 2

您正在使用API​​密钥进行身份验证，这意味着您只能访问公共数据。

请求

GET https://www.googleapis.com/plus/v1/people/+lindalawton

响应

{ 
"kind": "plus#person", 
"etag": "\"Sh4n9u6EtD24TM0RmWv7jTXojqc/8CXX3KsOcUfAF5mmrG4vyB-YNig\"", 
"occupation": "Google Developer Expert, BIA Developer at Targit", 
"skills": "Experience primarily in regards Microsoft products, Visual Studio, Bids, C# and asp.net. Past experience with PHP,JavaScript, MySQL and Linux. In recent years I have begun focusing on Business Intelligence, Data Warehousing, SQL Server/Analysis Services/Integration Services. Experience with OAuth2, Google Analytics API, Google Drive SDK.", 
"gender": "female", 
"urls": [ 
    { 
    "value": "http://www.youtube.com/user/Atthena71", 
    "type": "otherProfile", 
    "label": "Linda Lawton" 
    }, 
    { 
    "value": "http://twitter.com/LindaLawtonDK", 
    "type": "otherProfile", 
    "label": "lindalawtondk" 
    }, 
    { 
    "value": "http://stackoverflow.com/users/1841839/daimto", 
    "type": "otherProfile", 
    "label": "Stackoverflow/StackExchange" 
    }, 
    { 
    "value": "http://www.linkedin.com/profile/edit?trk=nav_responsive_sub_nav_edit_profile", 
    "type": "otherProfile", 
    "label": "Linkedin" 
    }, 
    { 
    "value": "http://daimto.com/", 
    "type": "contributor", 
    "label": "Daimto - data import tutorials" 
    }, 
    { 
    "value": "https://github.com/LindaLawton", 
    "type": "contributor", 
    "label": "GitHub - projects" 
    }, 
    { 
    "value": "https://github.com/google/google-api-dotnet-client", 
    "type": "contributor", 
    "label": "Google APIs .Net client - GitHub" 
    }, 
    { 
    "value": "https://github.com/LindaLawton/Google-Dotnet-Samples", 
    "type": "contributor", 
    "label": "Google APIs .Net Samples - GitHub " 
    }, 
    { 
    "value": "https://developers.google.com/analytics/", 
    "type": "other", 
    "label": "Google Analytics" 
    }, 
    { 
    "value": "https://developers.google.com/", 
    "type": "other", 
    "label": "Google Developers" 
    }, 
    { 
    "value": "https://developers.google.com/experts/+LindaLawton", 
    "type": "other", 
    "label": "Google Developer Expert - Linda Lawton" 
    } 
], 
"objectType": "person", 
"id": "117200475532672775346", 
"displayName": "Linda Lawton", 
"name": { 
    "familyName": "Lawton", 
    "givenName": "Linda" 
}, 
"tagline": "Google Developer Expert 2014 - 2017", 
"braggingRights": "Extreme Beekeeper first to recorded an Hive inspection using Google Glass with out a veil on.", 
"aboutMe": "\u003cdiv\u003e\u003cb\u003eBackground\u003c/b\u003e\u003c/div\u003e\u003cdiv\u003e\u003cdiv\u003eI have been working as an application developer since 1995. I have worked with a number of database systems Oracle, Microsoft SQL Server, and MySQL.  In recent years I have been mainly working with Microsoft products, Visual Studio, SSIS, and C#.   I the past I worked a lot with web development PHP, JavaScript, Ajax, power-builder,  Cobol and ASP.net.\u003c/div\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr /\u003e\u003c/div\u003e\u003cdiv\u003eWhile I have done front end development in the past. I find working with backed development working on automated systems fascinating.    I have spent the last 5 years creating custom SSIS (Dlls), and services and APIs for the cloud (Azure).\u003c/div\u003e\u003cdiv\u003e\u003cbr /\u003e\u003c/div\u003e\u003cdiv\u003e\u003cb\u003eGoogle API Addiction\u003c/b\u003e \u003c/div\u003e\u003cdiv\u003eIn 2012 I began working with the Google APIs, starting with the Google Analytics API.  I learned to appreciate the fact that Google is so open and willing to give us access to their systems. I started blogging about how to use the APIs writing short tutorials with sample projects.   \u003ca href=\"http://www.daimto.com/\" rel=\"nofollow\" target=\"_blank\"\u003eDaimto - Data Import Tutorials\u003c/a\u003e.   This along with my presents on a number of \u003ca href=\"http://stackoverflow.com/users/1841839/daimto\" rel=\"nofollow\" target=\"_blank\"\u003eDeveloper forms\u003c/a\u003e lead me to discovered by Google.  I became one of the first \u003ca href=\"https://developers.google.com/experts/+LindaLawton\" rel=\"nofollow\" target=\"_blank\"\u003eGoogle Developer Experts for Google Analytics\u003c/a\u003e.  \u003c/div\u003e\u003cdiv\u003e\u003cbr /\u003e\u003c/div\u003e\u003cdiv\u003eI also help support the \u003ca href=\"https://github.com/google/google-api-dotnet-client\" rel=\"nofollow\" target=\"_blank\"\u003eGoogle APIs client Library for .NET\u003c/a\u003e which provides simple, flexible, and powerful access to Google APIs such as Drive, YouTube, Calendar, Storage and Analytics.\u003c/div\u003e\u003cdiv\u003e\u003cbr /\u003e\u003c/div\u003e\u003cdiv\u003e\u003cb\u003eLife\u003c/b\u003e\u003c/div\u003e\u003cdiv\u003eI grew up in a small town in \u003ca href=\"http://en.wikipedia.org/wiki/Dartmouth,_Massachusetts\" rel=\"nofollow\" target=\"_blank\"\u003eMassachusetts\u003c/a\u003e, USA, I moved to \u003ca href=\"http://en.wikipedia.org/wiki/Denmark\" rel=\"nofollow\" target=\"_blank\"\u003eDenmark \u003c/a\u003ein 1998 and have lived here since. I have a 22 year old daughter.  My hobbies include reading science fiction, painting, and gardening.   \u003c/div\u003e", 
"url": "https://plus.google.com/+LindaLawton", 
"image": { 
    "url": "https://lh5.googleusercontent.com/-a1CWlFnA5xE/AAAAAAAAAAI/AAAAAAAAdVM/sHkU9F-AwwQ/photo.jpg?sz=50", 
    "isDefault": false 
}, 
"organizations": [ 
    { 
    "name": "Newberry College", 
    "title": "computer science", 
    "type": "school", 
    "startDate": "1991", 
    "endDate": "1994", 
    "primary": false 
    }, 
    { 
    "name": "TARGIT", 
    "title": "Business Intelligence Developer", 
    "type": "work", 
    "startDate": "2011", 
    "primary": true 
    }, 
    { 
    "name": "Logimatic", 
    "title": "developer", 
    "type": "work", 
    "startDate": "2008", 
    "endDate": "2010", 
    "primary": false 
    } 
], 
"placesLived": [ 
    { 
    "value": "Aalborg Denmark", 
    "primary": true 
    }, 
    { 
    "value": "Marathon Florida" 
    }, 
    { 
    "value": "Dartmouth Massachusetts" 
    }, 
    { 
    "value": "Ashford Connecticut" 
    }, 
    { 
    "value": "Nykøbing Mors Denmark" 
    } 
], 
"isPlusUser": true, 
"circledByCount": 2006, 
"verified": false, 
"cover": { 
    "layout": "banner", 
    "coverPhoto": { 
    "url": "https://lh3.googleusercontent.com/t2ViXd7ar3MeiOCeTe2g86Qd7wOnbRvuf3eTW3LPrs8jwBJwKS6gsC4KWhvbRSytJ5fsDne3sw=s630-fcrop64=1,00000000ffffffff", 
    "height": 528, 
    "width": 940 
    }, 
    "coverInfo": { 
    "topImageOffset": 0, 
    "leftImageOffset": 0 
    } 
} 
} 

只会返回什么说用户已设置为公开。如果他们的电子邮件不公开，您将无法看到它。