如何正确使用Golang中的OAuth2获取谷歌电子邮件

时间:2015-04-14 06:15:26

标签: go oauth-2.0 google-oauth

我已经尝试使用OA golang.com/x/oauth2库成功使用OAuth进行身份验证。

// provider variable is oauth2.Config
// scope is: https://www.googleapis.com/auth/userinfo.email
url := provider.AuthCodeURL(``) // redirect URL

从客户端重定向后,我成功发送了auth_code

auth_code := ctx.Request.URL.RawQuery // code=XXXX
if len(auth_code) > 5 {
    auth_code = auth_code[5:] // XXXX
}
tok, err := provider.Exchange(oauth2.NoContext, auth_code)
if err == nil {
    client := provider.Client(oauth2.NoContext, tok)
    email_url := `https://www.googleapis.com/auth/userinfo.email`
    //Log.Describe(client)
    response, err := client.Get(email_url) 
    if err == nil {
        ctx.Render(`login_oauth`, response)
        //handled = true
    }
}
//Log.Describe(err)

我发现没有任何内容告诉response上的电子邮件部分(Body为空):

{
    "Status": "200 OK",
    "StatusCode": 200,
    "Proto": "HTTP/1.1",
    "ProtoMajor": 1,
    "ProtoMinor": 1,
    "Header": {
        "Alternate-Protocol": [
            "443:quic,p=0.5"
        ],
        "Cache-Control": [
            "private, max-age=0"
        ],
        "Content-Type": [
            "text/plain"
        ],
        "Date": [
            "Tue, 14 Apr 2015 05:52:17 GMT"
        ],
        "Expires": [
            "Tue, 14 Apr 2015 05:52:17 GMT"
        ],
        "Server": [
            "GSE"
        ],
        "X-Content-Type-Options": [
            "nosniff"
        ],
        "X-Frame-Options": [
            "SAMEORIGIN"
        ],
        "X-Xss-Protection": [
            "1; mode=block"
        ]
    },
    "Body": {}, // empty!!!
    "ContentLength": -1,
    "TransferEncoding": [
        "chunked"
    ],
    "Close": false,
    "Trailer": null,
    "Request": {
        "Method": "GET",
        "URL": {
            "Scheme": "https",
            "Opaque": "",
            "User": null,
            "Host": "www.googleapis.com",
            "Path": "/auth/userinfo.email",
            "RawQuery": "",
            "Fragment": ""
        },
        "Proto": "HTTP/1.1",
        "ProtoMajor": 1,
        "ProtoMinor": 1,
        "Header": {
            "Authorization": [
                "Bearer ya29.VQFRHDe21t7g2cUhN8sUwjpRRi10XldgLe0RFhMe2ZxgyRo7q90HoKES5WmcucwKqtjZdq_KvYjKiQ"
            ]
        },
        "Body": null,
        "ContentLength": 0,
        "TransferEncoding": null,
        "Close": false,
        "Host": "www.googleapis.com",
        "Form": null,
        "PostForm": null,
        "MultipartForm": null,
        "Trailer": null,
        "RemoteAddr": "",
        "RequestURI": "",
        "TLS": null
    },
    "TLS": {
         // really long output
    }
}

第一个问题,如何正确收到电子邮件?不使用Google+ API。

编辑#2 我已尝试将另一个scope用于oauth2.Config

https://www.googleapis.com/auth/plus.profile.emails.read
https://www.googleapis.com/auth/plus.login
https://www.googleapis.com/auth/plus.me

并尝试使用较新的API检索电子邮件:

https://www.googleapis.com/plus/v1/people/me

但它提供了403 Forbidden

编辑#3 我尝试过使用其他范围:

openid
profile
email

并尝试使用以下网址检索电子邮件:

https://www.googleapis.com/oauth2/v3/userinfo

但它仍然像以前一样提供空Body

第二个问题,我可以将oauth2.Configprovider)变量重新用于其他用户吗?或者我应该为每个用户创建副本吗?

1 个答案:

答案 0 :(得分:4)

我的不好,我应该首先阅读response.Body,例如:

response, err = client.Get(`https://accounts.google.com/.well-known/openid-configuration`)
body, err := ioutil.ReadAll(response.Body)
response.Body.Close()

根据this文档,我们应首先从该网址获取,然后从上面的结果中提取userinfo_endpoint以检索电子邮件,例如:

// json := json_to_map(body)
// get json[`userinfo_endpoint`]
// response, err = client.Get(json[`userinfo_endpoint`])
// body, err := ioutil.ReadAll(response.Body)
// response.Body.Close()
// json = json_to_map(body)
// json[`email`]

对于第二个问题,oauth2.Config结构是可重用的。