How to use basic auth in HTTP request?

What is basic authentication in REST API example?

REST, by definition, has "representational state transfer".

That means it should not contain any data about the resource itself.

What REST provides is a uniform interface to a resource. So what you are trying to do is not RESTful. A user does not know which resource he is calling. But you could do something like this:
GET /rest/api/user/1. And the user gets all information about him/her/it that is stored in that rest resource. The HTTP header would contain the authentication information, but the response will not.

How to create a rest API with authentication?

I'm writing a backend for an iOS app and I've been searching for an example of how to do it.

I need to create a rest API for the app which authenticates users, but I haven't found any good tutorial or example. I need to be able to do authentication in different ways: Basic HTTP authentication (username and password), token based authentication (JWT or something else), etc.

The problem is that I don't know where to start. What are the first steps to make a REST API with authentication? Do I have to use OAuth 2.0 to get token based authentication? What kind of information must I send to the server?
I found some tutorials which seem outdated but they don't give a very clear idea of how to do it. I've searched a lot but I couldn't find a good tutorial or documentation.

Thank you very much! If you need to have JWT token based authentication, you need to have your backend set-up with the authorization server. In this case, you will have a token issuer, who will generate a token and send it to your backend. If the backend has configured the authorization server with its service endpoint, then it will ask the authorization server for the user credentials when you send the token to it.

There are some examples here: You can also use AWS Cognito as authorization server, but there is no need to use it if you already have a token issuer. The backend part is pretty simple. You just need to send the user credentials with the token and the secret to the backend server. The server will decode the token, verify the credentials and create a new token and send it back. It should be that simple.

How do I pass basic authentication in rest template?

My request looks like this: RestTemplate restTemplate = new RestTemplate();. HttpHeaders headers = new HttpHeaders();. Headers.add("Accept", "application/json"); headers.add("Content-type", "application/json"); headers.HttpComponentsClientHttpRequestFactory factory = new RestTemplate.HttpComponentsClientHttpRequestFactory(new StringHttpMessageConverter());
Factory.setReadTimeout(10000); factory.setConnectTimeout(5000); restTemplate.setRequestFactory(factory); This works fine, but I need to change the authorization with a token. How do I use BasicAuthentication? How can I set the token? I tried to use this, but it does not work: headers.setAuthentication(new HttpHeaders().authenticateBasic("token", "password"));
I finally figured out the problem. In my rest template: RestTemplate restTemplate = new RestTemplate();. I changed it to: RestTemplate restTemplate = new RestTemplate(createHttpClientBuilder().build()); Here is the code: HttpClient httpclient = createHttpClientBuilder().build(); HttpComponentsClientHttpRequestFactory factory = new RestTemplate.HttpComponentsClientHttpRequestFactory(new StringHttpMessageConverter()); factory.setReadTimeout(10000); factory.setConnectTimeout(5000); RestTemplate restTemplate = new RestTemplate(httpclient);. RestTemplate.setRequestFactory(factory); And for my token authentication: