BearerTokenResolver (spring-security-docs 5.6.3 API)

All Known Implementing Classes:

DefaultBearerTokenResolver, HeaderBearerTokenResolver

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface BearerTokenResolver
```
A strategy for resolving Bearer Tokens from the HttpServletRequest.

Since:

5.1

See Also:

RFC 6750 Section 2: Authenticated Requests

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.String`	`resolve(javax.servlet.http.HttpServletRequest request)`	Resolve any Bearer Token value from the request.

- Method Detail
  - resolve
```
java.lang.String resolve(javax.servlet.http.HttpServletRequest request)
```
    Resolve any Bearer Token value from the request.
    
    Parameters:
    
    request - the request
    
    Returns:
    
    the Bearer Token value or null if none found
    
    Throws:
    
    OAuth2AuthenticationException - if the found token is invalid