Authenticator

okhttp3

Interface Authenticator

```
public interface Authenticator
```
Responds to an authentication challenge from either a remote web server or a proxy server. Implementations may either attempt to satisfy the challenge by returning a request that includes an authorization header, or they may refuse the challenge by returning null. In this case the unauthenticated response will be returned to the caller that triggered it.
When authentication is requested by an origin server, the response code is 401 and the implementation should respond with a new request that sets the "Authorization" header.
```
    String credential = Credentials.basic(...) return response.request().newBuilder() .header("Authorization", credential) .build(); 
```
Whn authentication is requested by a proxy server, the response code is 407 and the implementation should respond with a new request that sets the "Proxy-Authorization" header.
```
    String credential = Credentials.basic(...) return response.request().newBuilder() .header("Proxy-Authorization", credential) .build(); 
```
Applications may configure OkHttp with an authenticator for origin servers, or proxy servers, or both.

Field Summary

Fields

Modifier and Type	Field and Description
`static Authenticator`	`NONE` An authenticator that knows no credentials and makes no attempt to authenticate.

Method Summary

All Methods

Instance Methods

Abstract Methods
Modifier and Type	Method and Description
`Request`	`authenticate(Route route, Response response)` Returns a request that includes a credential to satisfy an authentication challenge in `response`.

- Field Detail
  - NONE
```
static final Authenticator NONE
```
    An authenticator that knows no credentials and makes no attempt to authenticate.
- Method Detail
  - authenticate
```
Request authenticate(Route route,
                     Response response)
              throws IOException
```
    Returns a request that includes a credential to satisfy an authentication challenge in response. Returns null if the challenge cannot be satisfied.
    
    Throws:
    
    IOException