Package org.springframework.web.client

Class DefaultResponseErrorHandler

java.lang.Object

org.springframework.web.client.DefaultResponseErrorHandler

All Implemented Interfaces:

ResponseErrorHandler

Direct Known Subclasses:

ExtractingResponseErrorHandler

public class DefaultResponseErrorHandler
extends Object
implements ResponseErrorHandler

Spring's default implementation of the ResponseErrorHandler interface.

This error handler checks for the status code on the ClientHttpResponse. Any code in the 4xx or 5xx series is considered to be an error. This behavior can be changed by overriding hasError(HttpStatus). Unknown status codes will be ignored by hasError(ClientHttpResponse).

See handleError(ClientHttpResponse) for more details on specific exception types.

Since:

3.0

Author:

Arjen Poutsma, Rossen Stoyanchev, Juergen Hoeller

See Also:

• RestTemplate.setErrorHandler(org.springframework.web.client.ResponseErrorHandler)

Constructor Summary

Constructors

Constructor	Description
DefaultResponseErrorHandler()

Method Summary

Modifier and Type	Method	Description
protected Charset	getCharset(ClientHttpResponse response)	Determine the charset of the response (for inclusion in a status exception).
protected byte[]	getResponseBody(ClientHttpResponse response)	Read the body of the given response (for inclusion in a status exception).
void	handleError(ClientHttpResponse response)	Handle the error in the given response with the given resolved status code.
protected void	handleError(ClientHttpResponse response, HttpStatus statusCode)	Handle the error based on the resolved status code.
protected boolean	hasError(int unknownStatusCode)	Template method called from hasError(ClientHttpResponse).
boolean	hasError(ClientHttpResponse response)	Delegates to hasError(HttpStatus) (for a standard status enum value) or hasError(int) (for an unknown status code) with the response status code.
protected boolean	hasError(HttpStatus statusCode)	Template method called from hasError(ClientHttpResponse).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.web.client.ResponseErrorHandler

handleError

Constructor Details

DefaultResponseErrorHandler

public DefaultResponseErrorHandler()

Method Details

hasError

public boolean hasError(ClientHttpResponse response)
                 throws IOException

Delegates to hasError(HttpStatus) (for a standard status enum value) or hasError(int) (for an unknown status code) with the response status code.

Specified by:

hasError in interface ResponseErrorHandler

Parameters:

response - the response to inspect

Returns:

true if the response indicates an error; false otherwise

Throws:

IOException - in case of I/O errors

See Also:

• ClientHttpResponse.getRawStatusCode()
• hasError(HttpStatus)
• hasError(int)

hasError

protected boolean hasError(HttpStatus statusCode)

Template method called from hasError(ClientHttpResponse).

The default implementation checks HttpStatus.isError(). Can be overridden in subclasses.

Parameters:

statusCode - the HTTP status code as enum value

Returns:

true if the response indicates an error; false otherwise

See Also:

• HttpStatus.isError()

hasError

protected boolean hasError(int unknownStatusCode)

Template method called from hasError(ClientHttpResponse).

The default implementation checks if the given status code is CLIENT_ERROR or SERVER_ERROR. Can be overridden in subclasses.

Parameters:

unknownStatusCode - the HTTP status code as raw value

Returns:

true if the response indicates an error; false otherwise

Since:

4.3.21

See Also:

• HttpStatus.Series.CLIENT_ERROR
• HttpStatus.Series.SERVER_ERROR

handleError

public void handleError(ClientHttpResponse response)
                 throws IOException

Handle the error in the given response with the given resolved status code.

The default implementation throws:

• HttpClientErrorException if the status code is in the 4xx series, or one of its sub-classes such as HttpClientErrorException.BadRequest and others.
• HttpServerErrorException if the status code is in the 5xx series, or one of its sub-classes such as HttpServerErrorException.InternalServerError and others.
• UnknownHttpStatusCodeException for error status codes not in the HttpStatus enum range.

Specified by:

handleError in interface ResponseErrorHandler

Parameters:

response - the response with the error

Throws:

UnknownHttpStatusCodeException - in case of an unresolvable status code

IOException - in case of I/O errors

See Also:

• handleError(ClientHttpResponse, HttpStatus)

handleError

protected void handleError(ClientHttpResponse response,
 HttpStatus statusCode)
                    throws IOException

Handle the error based on the resolved status code.

The default implementation delegates to HttpClientErrorException.create(org.springframework.http.HttpStatus, java.lang.String, org.springframework.http.HttpHeaders, byte[], java.nio.charset.Charset) for errors in the 4xx range, to HttpServerErrorException.create(org.springframework.http.HttpStatus, java.lang.String, org.springframework.http.HttpHeaders, byte[], java.nio.charset.Charset) for errors in the 5xx range, or otherwise raises UnknownHttpStatusCodeException.

Throws:

IOException

Since:

5.0

See Also:

• HttpClientErrorException.create(org.springframework.http.HttpStatus, java.lang.String, org.springframework.http.HttpHeaders, byte[], java.nio.charset.Charset)
• HttpServerErrorException.create(org.springframework.http.HttpStatus, java.lang.String, org.springframework.http.HttpHeaders, byte[], java.nio.charset.Charset)

getResponseBody

protected byte[] getResponseBody(ClientHttpResponse response)

Read the body of the given response (for inclusion in a status exception).

Parameters:

response - the response to inspect

Returns:

the response body as a byte array, or an empty byte array if the body could not be read

Since:

4.3.8

getCharset

@Nullable
protected Charset getCharset(ClientHttpResponse response)

Determine the charset of the response (for inclusion in a status exception).

Parameters:

response - the response to inspect

Returns:

the associated charset, or null if none

Since:

4.3.8