问题描述
我需要使用Google Projects服务帐户来使用JavaScript访问Google API.为此,我需要对Google API服务器进行OAuth2认证,以获取身份验证令牌.
我了解Google提供了可在节点服务器上使用的库(GAPI),但我需要一种可以在其他安全JavaScript环境中使用的解决方案.
此任务分为两个主要部分.
- 配置
- 编码
首先执行配置步骤.
- 如果您没有Google帐户:
现在是编码部分.
- 首先下载 jsrsasign ,然后添加对"jsrsasign-all-min.js"的引用.如果您愿意,可以从github下载"jsrsasign-all-min.js"
-
第二次使用您的cert/key(先前下载的)更新以下脚本:
函数postJWT(jwt,回调){var xhttp = new XMLHttpRequest();xhttp.onreadystatechange = function(){如果(this.readyState == 4){if(this.status == 200&&回调){回调(this.responseText);返回;}如果(控制台)console.log(this.responseText);}};var parameters ="grant_type =" + encodeURIComponent("urn:ietf:params:oauth:grant-type:jwt-bearer")+& assertion =" + encodeURIComponent(jwt);xhttp.open("POST","https://www.googleapis.com/oauth2/v4/token",true);xhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");xhttp.send(parameters);}函数getCert(){var cert =//您的json密钥(先前下载)在此处{"type":"service_account","project_id":"proj ..","private_key_id":"e18 ..","private_key":"-----开始私钥----- \ nMII .. == \ n -----结束私钥----- \ n","client_email":"service-account @ ... iam.gserviceaccount.com","client_id":"5761 ..","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://accounts.google.com/o/oauth2/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","client_x509_cert_url":"https://www.googleapis.com/robot/v1/metadata/x509/..service-account%40...iam.gserviceaccount.com"};退货证明书;}函数getJWT(){var cert = getCert();var key = KEYUTIL.getKey(cert.private_key);var headers = {" alg:" RS256," typ:" JWT};发出的var = Math.floor(new Date().getTime()/1000);var Claims = {"iss":cert.client_email,"scope":"https://www.googleapis.com/auth/analytics.readonly","aud":"https://www.googleapis.com/oauth2/v4/token","exp":已发布+ 3600,"iat":已发布};var jwt = KJUR.jws.JWS.sign(headers.alg,headers,JSON.stringify(claims),key);返回jwt;}
-
在测试代码时,您应该收到一个带有auth令牌的json对象.您可以像这样测试实现:
postJWT(getJWT(text),function(){让令牌= JSON.parse(response).access_token;//使用令牌在此处调用您的api.//最多重复使用令牌1小时.});
这是一个带有令牌的成功json对象示例:
{"access_token":"ya29.c.ElkABZznrLNLK6ZAq2ybiH5lsRJpABE8p7MlZZJ0WCKcDNDv75lh-o1iRX__uMNUKSySiawm4YJGsbfqJH2JH61nRK6O2m0GJR7DgE2"token_type":承载者","expires_in":3600}
请注意,这种方法要求可以从您的JavaScript环境访问密钥/证书.如果此环境是公共环境,则您的api很容易受到攻击.
I need to use a google projects service account to access google API using JavaScript. In order to do this I need to OAuth2 to google API servers to get an auth token.
I understand that Google provides a library (GAPI) for use on node servers, but I need a solution that will work in other secure JavaScript environments.
There are two major divisions to this task.
- Configuring
- Coding
First the Configuration steps.
- If you don't have a google account:
- Navigate to google.com
- Find and Click "Sign In"
- Click "More Options"
- Click "Create Account"
- Follow the steps to create an account
- Navigate to the api dashboard: console.developers.google.com/apis/dashboard
Select or create a project by clicking on the current project. The project I have showing is called "My Project"
Click and enable those API you plan to work with
- navigate to the credentials section: console.developers.google.com/apis/credentials
- Click and select "Service account key"
- If you create a new service account, for testing set the role to "project" "owner". You'll want to read up on google Api roles eventually. See Managing Roles and Granting Roles to Service Accounts
- Ensure "Key Type" is "Json" and click "Create". You're key/cert will automatically download
Now for the Coding portion.
- First download jsrsasign and add reference to "jsrsasign-all-min.js". If you want you can download just "jsrsasign-all-min.js" from github
Second update the following script with your cert/key (downloaded earlier):
function postJWT(jwt, callback) { var xhttp = new XMLHttpRequest(); xhttp.onreadystatechange = function () { if (this.readyState == 4) { if (this.status == 200 && callback) { callback(this.responseText); return; } if (console) console.log(this.responseText); } }; var parameters = "grant_type=" + encodeURIComponent("urn:ietf:params:oauth:grant-type:jwt-bearer") + "&assertion=" + encodeURIComponent(jwt); xhttp.open("POST", "https://www.googleapis.com/oauth2/v4/token", true); xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); xhttp.send(parameters); } function getCert() { var cert = //your json key (downloaded earlier) goes here { "type": "service_account", "project_id": "proj..", "private_key_id": "e18..", "private_key": "-----BEGIN PRIVATE KEY-----\nMII..==\n-----END PRIVATE KEY-----\n", "client_email": "service-account@...iam.gserviceaccount.com", "client_id": "5761..", "auth_uri": "https://accounts.google.com/o/oauth2/auth", "token_uri": "https://accounts.google.com/o/oauth2/token", "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs", "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/..service-account%40...iam.gserviceaccount.com" }; return cert; } function getJWT() { var cert = getCert(); var key = KEYUTIL.getKey(cert.private_key); var headers = { "alg": "RS256", "typ": "JWT" }; var issued = Math.floor(new Date().getTime()/1000); var claims = { "iss": cert.client_email, "scope": "https://www.googleapis.com/auth/analytics.readonly", "aud": "https://www.googleapis.com/oauth2/v4/token", "exp": issued + 3600, "iat": issued }; var jwt = KJUR.jws.JWS.sign(headers.alg, headers, JSON.stringify(claims), key); return jwt; }
When you test your code you should receive a json object back with an auth token. You can test your implementation like so:
postJWT(getJWT(text), function(){ let token = JSON.parse(response).access_token; //Do your api calls here using the token. //Reuse the token for up to 1 hour. });
Here is an example successful json object with token:
{
"access_token": "ya29.c.ElkABZznrLNLK6ZAq2ybiH5lsRJpABE8p7MlZZJ0WCKcDNDv75lh-o1iRX__uMNUKSySiawm4YJGsbfqJH2JH61nRK6O2m0GJR7DgkEmo6ZlKtrvzke9C3xpwA",
"token_type": "Bearer",
"expires_in": 3600
}
Please note that this approach requires that the key/cert be accessible from your javascript environment. If this environment is public your api is vulnerable.
这篇关于如何使用Javascript从Google Api检索服务帐户OAuth2令牌?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!