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1function generateJWT(){
2                //set credentials
3                var BASE_URL = document.getElementById("baseUrl").value;
4                var ACCESS_KEY = document.getElementById("accessKey").value;
5                var SECRET_KEY = document.getElementById("secretKey").value
6                var ACCOUNT_ID = document.getElementById("accountId").value;
7                //Get List of Cycles
8                var METHOD = document.getElementById("method").value;
9                var API_URI = document.getElementById("apiURI").value;
10                var JWT_EXPIRE = document.getElementById("jwtExpire").value | 3600;
11                if(API_URI) {
12                    var RELATIVE_PATH = API_URI.split(BASE_URL)[1].split("?")[0];
13                    var QUERY_STRING = API_URI.split(BASE_URL)[1].split("?")[1];
14                    var CANONICAL_PATH;
15                    if (QUERY_STRING) {
16                        CANONICAL_PATH = METHOD + '&' + RELATIVE_PATH + '&' + QUERY_STRING;
17                    } else {
18                        CANONICAL_PATH = METHOD + '&' + RELATIVE_PATH + '&';
19                    }
20                }else{
21                    return;
22                }
23                var header = {
24                    "alg": "HS256",
25                    "typ": "JWT"
26                };
27                var jwt_payload = {
28                    'sub': ACCOUNT_ID,
29                    'qsh': CryptoJS.SHA256(CANONICAL_PATH).toString(),
30                    'iss': ACCESS_KEY,
31                    'exp': new Date().getTime()+JWT_EXPIRE,
32                    'iat': new Date().getTime()
33                }
34                var stringifiedHeader = CryptoJS.enc.Utf8.parse(JSON.stringify(header));
35                var encodedHeader = base64url(stringifiedHeader);
36                var stringifiedData = CryptoJS.enc.Utf8.parse(JSON.stringify(jwt_payload));
37                var encodedData = base64url(stringifiedData);
38                var token = encodedHeader + "." + encodedData;
39                var signature = CryptoJS.HmacSHA256(token, SECRET_KEY);
40                signature = base64url(signature);
41                var signedToken = token + "." + signature;
42                document.getElementById("token").innerHTML=signedToken;
43            }
44            function base64url(source) {
45                // Encode in classical base64
46                encodedSource = CryptoJS.enc.Base64.stringify(source);
47                // Remove padding equal characters
48                encodedSource = encodedSource.replace(/=+$/, '');
49                // Replace characters according to base64url specifications
50                encodedSource = encodedSource.replace(/\+/g, '-');
51                encodedSource = encodedSource.replace(/\//g, '_');
52                return encodedSource;
53            }