I have created a simple REACT application that is ONLY run on a local PC attached to a large screen on our network. Internal use only! It is like a billboard or dashboard. There is ZERO user interaction. The screen is NOT a touch screen and there is no keyboard and mouse attached. Therefore NO users to login.
The REACT application is build and then deployed to a folder on the PC. All automated. The initial deployment includes all current data. Then at windows startup a command something like this is executed:
"python -m http.server 3000" (just example...)
The application has initial data that was deployed with the application, however, I would like it to also be able to call a secure Azure WebAPI service to get updated statistics every few minutes. Very small data. Mostly integer values. I just want to provide some real time updates.
I have the REACT app fully working (if the WEBAPI is not secure) or the individual calls allow anonymous. However, we have business rules that require all endpoints to be secure.
This app runs locally, but the API is an Azure App Service.
I have setup the REACT application in Azure AD as a registered application and configured it to have permissions to call the WEBAPI service.
I have many console applications that are setup and work basically the same way as this REACT application. With the C# daemon applications, there is a MSAL package that makes it easy.
I am trying to learn REACT, and instead of building this as another WPF or UWP application, I wanted to try using REACT.
So, I know I need an access token somehow. I was thinking with a client ID and Secret just like I do in my C# daemon clients that are written in C#.
I cannot find any REACT nor Angular examples that do this without a user login first. Remember, the PC does not have input devices. Display ONLY. Again, my app does not have users. It calls a secure API to get data. That's it.
Thanks for your help.
Using Joy Wang's comments and this page from documentation:
Service-to-Service Access Token Request
This is my new code:
const adalConfig = {
tenant: '...',
clientId: '...',
clientSecret: '...',
authority: 'https://login.microsoftonline.com/{tenant}/oauth2/token',
endpoints: {
apiResourceId: 'api://bbbbbb-...',
},
};
function getAccessToken() {
var requestParams = {
grant_type: 'client_credentials',
client_id: adalConfig.clientId,
client_secret: adalConfig.clientSecret,
resource: adalConfig.endpoints.apiResourceId
};
// Make a request to the token issuing endpoint.
fetch(adalConfig.authority,
{
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify( requestParams )
}).then(response => {
if (response.status >= 200 && response.status < 300) {
console.log(response);
console.log(response.json());
} else {
console.log('Somthing happened wrong');
console.log(response);
}
}).catch(err => err);
}
When I call the function above, I get the following response:
Response {type: "cors", url: "https://login.microsoftonline.com/.../oauth2/token", redirected: false, status: 400, ok: false, …}
body: (...)
bodyUsed: false
headers: Headers {}
ok: false
redirected: false
status: 400
statusText: "Bad Request"
type: "cors"
url: "https://login.microsoftonline.com/.../oauth2/token"
proto: Response
Maybe there is another way to start the REACT application so that CORS is not checked? Any ideas?
Thanks again.
So, currently there is not a secure way to do what I want. The basic issue is that you cannot use the client credential grant type from JavaScript in a browser.
However, I think I have a good work around that may help others. I am sure it is NOT for most application. And I believe OAUTH is working on a solution so this may not be needed in the near future. If a better solution is add, I will gladly mark it as the correct answer. Thanks for your help.
My app is basically an automated dashboard/billboard with ZERO user input. It pulls secure data and displays it. The REACT application is ONLY on a LOCAL PC on a wall with NO inputs. A script runs when the PC is turned on.
The script starts the built REACT application using an http server like python.
Ex: "python -m http.server 8000"
The script then opens the browser in kiosk mode so the only thing you see on the screen is the application.
So far, this is exactly as I had it before.
WORK AROUND:
I created a command line utility called GetToken. Before the REACT application is started by the script, it calls this utility like so: "gettoken --client Dashboard --file token.json"
This utility makes the Client Credential Grant Type call to get a token.
It then saved that token to a local json file with the other built REACT files. Ex: \public\data\token.json
In my REACT application, it just loads the token and uses it.
const t = await fetch('./data/token.json').then(r => r.json());
this.setState({ token: t.token });
Then I just add this to my api calls like so:
const fetchOptions = {
method: 'GET',
headers: {
"Authorization": `Bearer ${this.state.token}`,
"Content-Type": "application/json"
}
};
const newSlides = await fetch(this.state.baseUrl + '/api/Dashboard/GetSlides', fetchOptions).then(response => response.json());
IMPORTANT: This only works if you also have the ability to update the API. If you cannot, then you will still get CORS errors. You will have to allow calls from the localhost and port you use to start you application. You should pick something other than 3000, 4200, or 8000.
I added the following to my API startup.cs:
public void ConfigureServices(IServiceCollection services) {
...
var origins = Configuration.GetSection("AppSettings:AllowedOrigins").Value.Split(",");
services.AddCors(o => o.AddPolicy(specificOriginsPolicy, builder => {
builder.WithOrigins(origins)
.AllowAnyMethod()
.AllowAnyHeader()
.AllowCredentials()
.SetIsOriginAllowed((host) => true);
}));
...
}
public void Configure(IApplicationBuilder app) {
...
app.UseCors(specificOriginsPolicy);
...
}
I am still refining this solution, but it works well so far. I may turn the utility into a background service that is updating the token on an interval. Or I may turn the utility into a Shell, and then use it instead of the script. Either way, you get the idea.
LESSON:
I know I could have done this as a UWP or WPF application and avoided all these issues, but the main goal was to learn REACT. I learned a lot. I would do it again. It is shocking just how little code there is to my REACT application now that it is done. I believe REACT could be used for many similar scenarios.
You could refer to this sample, it uses client credential flow(i.e. client id and secret you want) to get the access token, just change the resource to the one you want to get token for, the sample gets the token for Microsoft Graph.
auth.getAccessToken = function () {
var deferred = Q.defer();
// These are the parameters necessary for the OAuth 2.0 Client Credentials Grant Flow.
// For more information, see Service to Service Calls Using Client Credentials (https://msdn.microsoft.com/library/azure/dn645543.aspx).
var requestParams = {
grant_type: 'client_credentials',
client_id: config.clientId,
client_secret: config.clientSecret,
resource: 'https://graph.microsoft.com'
};
// Make a request to the token issuing endpoint.
request.post({ url: config.tokenEndpoint, form: requestParams }, function (err, response, body) {
var parsedBody = JSON.parse(body);
console.log(parsedBody);
if (err) {
deferred.reject(err);
} else if (parsedBody.error) {
deferred.reject(parsedBody.error_description);
} else {
// If successful, return the access token.
deferred.resolve(parsedBody.access_token);
}
});
return deferred.promise;
};
I have a Lumen backend and an Angularjs project on the same server without a virtual host. The way I access APIs is simply by the URL like www.example.com/api/public/get_some_data. I want to hide these endpoints from the public but only allow access from the Angularjs.
I tried adding this to the .htaccess in the api/public folder,
Order deny, allow
Deny from all
Allow from 127.0.0.1
But Angular will be denied as well.
I access the endpoint from Angular like this,
function login(user) {
return $http({
method: 'POST',
url: 'api/public/login/user',
data: user,
headers: {'Content-Type': 'application/json'}
}).then(function(response){
console.log(response);
localStorage.setItem('token', response.data.token);
}).catch(dataServiceError);
}
Angular is client side framework. There is no difference for a server if a request comes from Angular application or anywhere else.
Access can be restricted based on some condition that can be satisfied by client side application, like request headers (example).
Security through obscurity is the weakest form of security and shouldn't be relied on. A proper solution in this case is basic authentication or token-based authentication.
Still, if an intruder has access to Angular application, he or she automatically gains access to API endpoints and can extract authentication information from the application.
When I try to retrieve the Office365 Groups I'm member of using AngularJS HTTP Get. I always get a 400 - Bad Request error in Chrome. In IE I do get a result.
var endpoint = "https://graph.microsoft.com/v1.0/me/memberOf/$/microsoft.graph.group?$filter=groupTypes/any(a:a eq 'unified')";
this.$http.get(endpoint, {
headers: {
"Content-Type": "application/json;odata=verbose"
}
}).then(function (result) {
console.log(result);
}, function (error) {
console.log("error:" + error);
});
Looks like the quotes in the URL are replaced with %27 and the Microsoft Graph/OData doesn't support this. I'll get the following error back:
Collection open properties are not supported in this release.
The JoinedGroups resource isn't available in the Microsoft Graph anymore. Is there another way to retrieve to Groups I am member of? Or is there another way to do this in Angular?
You can use ListMemberOf to get members of a group. here is a reference how to call the endpoint:
https://graph.microsoft.io/docs/api-reference/v1.0/api/group_list_members
You can use any falvor of JS client library to request o365 api. there is no limitation of which library you use as you have a correct request to the endpoint.
You can also use the graph explorer to make sure that you have a right request before coding it in AngularJS.
Graph explorer url: https://graphexplorer2.azurewebsites.net/
Hope this helps.
Office 365 unified groups I’m member of: https://graph.microsoft.com/v1.0/me/memberOf/$/microsoft.graph.group?$filter=groupTypes/any(a:a%20eq%20'unified')
I am trying to create a custom API for Azure Mobile Services that does a Transact-SQL command on the table. According to the docs I should be able to use an object called 'mssql' to do this (http://msdn.microsoft.com/en-us/library/jj554212.aspx). However, the object does not seem to exist and my backend script always fails with error 500 (internal server error). Does this object not exist in custom API backend scripts?
To use that object in a custom API, you should access it via the request object passed to the API:
exports.get = function(request, response) {
var mssql = request.services.mssql;
mssql.query('select GETDATE() from myTable', {
success: function(results) {
response.send(200, { serverTime: results[0] });
}
});
}
I am fairly new to AngularJS
I have a resource that I use for user management which is part of a service following this article.
Once sending the login request to the server I am getting a response with a set-cookie as part of the header.
What is the best practice to add this cookie to every request I am sending to the server?
myApp.factory('UserService', ['$resource', function ($resource) {
var userRes = $resource('http://<MyDomain>/api/v1/user/:param',
{param: '#param'},
{
login: {
method: 'POST'
},
logout: {
method: 'DELETE'
}
});
var user;
return {
signIn: function () {
user = userRes.login({param: 'login'}, {"email": "SomeName#MyDomain.com", "password": "test1"});
userRes.get({param: '1'});
},
userRes.login has set-cookie header in on the response
userRes.get does not send the cookie that was just received.
Cheers
Since your API is in a different domain you can't use cookies in this case. We've tried and we failed to put it simple there is no way, not only it doesn't work with CORS but also it doesn't work if you embed an iframe. The iframe trick fails on safaris mostly but it is not reliable.
What we usually do is to return a JWT (Json Web Token) from the API and attach a header then to every API request as Authorization: Bearer JWT.
This JWT can be decoded using a public key from the front end (and it will contain the user profile) and validad with a private key in the backend.
JWT is simple and there are plenty of libraries for every language/technology.
Auth0 is an authentication broker that can validate with any identity provider or custom databases, and it returns JWTs using standars. It provides a clientID that can be used to decode the profile in the front end and a secret to validate the tokens in the backend as well as client side library to do this.
Disclaimer: I work for auth0.