HttpUpgradeHandshake (Red Hat JBoss Enterprise Application Platform 8.0.0.Beta public API)

```
public interface HttpUpgradeHandshake
```
Server side upgrade handler. This handler can inspect the request and modify the response.
If the request does not meet this handlers requirements it should return false to allow other upgrade handlers to inspect the request.
If the request is invalid (e.g. security information is invalid) this should thrown an IoException. if this occurs no further handlers will be tried.

Author:

Stuart Douglas

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`handleUpgrade(HttpServerExchange exchange)`	Validates an upgrade request and returns any extra headers that should be added to the response.

- Method Detail
  - handleUpgrade
```
boolean handleUpgrade(HttpServerExchange exchange)
               throws IOException
```
    Validates an upgrade request and returns any extra headers that should be added to the response.
    
    Parameters:
    
    exchange - the server exchange
    
    Returns:
    
    true if the handshake is valid and should be upgraded. False if it is invalid
    
    Throws:
    
    IOException - If the handshake is invalid