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August 15, 2018 17:11
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A sample use case of sending a message to an API protected by AWS Cognito.
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| function ajax(method, url, data, callback) { | |
| var req = new XMLHttpRequest(); | |
| req.open(method, url); | |
| req.addEventListener("load", function () { | |
| if (req.status >= 200 && req.status < 400) { | |
| callback(); | |
| } else { | |
| console.error(req.status + " " + req.statusText + " " + url); | |
| } | |
| }); | |
| req.addEventListener("error", function () { | |
| console.error("URL " + url + " unreachable."); | |
| }); | |
| req.setRequestHeader("Content-Type", "application/json"); | |
| data = JSON.stringify(data); | |
| req.send(data); | |
| } | |
| function apiClient(httpMethod){ | |
| var formData = new FormData(form); | |
| var authData = { | |
| Username : formData.get('username'), | |
| Password : formData.get('password'), | |
| }; | |
| var authDetails = new AWSCognito.CognitoIdentityServiceProvider.AuthenticationDetails(authData); | |
| var poolData = { | |
| UserPoolId : 'us-east-1_rXXXXX', | |
| ClientId : 'YYtuXXXXdkhc85XXXXXXX' | |
| }; | |
| var userPool = new AWSCognito.CognitoIdentityServiceProvider.CognitoUserPool(poolData); | |
| var userData = { | |
| Username : formData.get('username'), | |
| Pool : userPool, | |
| }; | |
| var cognitoUser = new AWSCognito.CognitoIdentityServiceProvider.CognitoUser(userData); | |
| cognitoUser.authenticateUser(authDetails, { | |
| onSuccess: function(result) { | |
| var idToken = result.getIdToken().getJwtToken(); | |
| var data = { | |
| 'Username': formData.get('username'), | |
| 'Message': formData.get('message'), | |
| 'Id-token': idToken, | |
| }; | |
| AWS.config.credentials = new AWS.CognitoIdentityCredentials({ | |
| IdentityPoolId : 'us-east-1_XXXX', | |
| Logins : { | |
| 'cognito-idp.us-east-1.amazonaws.com/us-east-1_XXXX' : idToken | |
| } | |
| }); | |
| ajax( | |
| httpMethod, | |
| "https://XXXXX-XXXXX.execute-api.us-east-1.amazonaws.com/prod", | |
| data, | |
| function(){ | |
| alert("Message sent!"); | |
| } | |
| ) | |
| }, | |
| onFailure: function(err) { | |
| alert(err); | |
| }, | |
| newPasswordRequired: function(userAttributes, requiredAttributes) { | |
| cognitoUser.completeNewPasswordChallenge( | |
| prompt("First connexion. Please, choose new password: ")) | |
| } | |
| }); | |
| } | |
| var form = document.querySelector("form"); | |
| form.addEventListener("submit", function(e){ | |
| e.preventDefault(); | |
| apiClient('POST'); | |
| }) |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Test Cognito</title> | |
| </head> | |
| <body> | |
| <form> | |
| <h1>Message form</h1> | |
| <p> | |
| <label for="username">Username</label> : | |
| <input type="text" name="username" id="username" required> | |
| </p> | |
| <p> | |
| <label for="password">Password</label> : | |
| <input type="password" name="password" id="password" required> | |
| </p> | |
| <p> | |
| <label for="message">Message</label> : | |
| <textarea type="textarea" name="message" id="message" required></textarea> | |
| </p> | |
| <input type="submit" value="Send new"> | |
| <input type="button" id="button-edit" value="Edit existing"> | |
| <input type="reset" value="Reset"> | |
| </form> | |
| <script src="[PATH]/aws-cognito-sdk.min.js"></script> | |
| <script src="[PATH]/amazon-cognito-identity.min.js"></script> | |
| <script src="[PATH]/aws-sdk.min.js"></script> | |
| <script src="[PATH]/cognito-auth.js"></script> | |
| </body> | |
| </html> |
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