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Missing path variable is now a 500 error 

Before this change a missing path variable value resulted in a 400
error where in fact the error is due to a mismatch between the
declared @PathVariable and the URI template, i.e. a 500 error.

This change introduced a MissingPathVariableException as a sub-class
of ServletRequestBindingException (the exception previously thrown)
and results in a response status code of 500 by default.

Issue: SPR-13121
This commit is contained in:
Rossen Stoyanchev 2015-06-15 16:09:19 -04:00
parent 7b365583e3
commit 4b05bda0bf
7 changed files with 167 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
spring-web/src/main/java/org/springframework/web/bind/MissingPathVariableException.java Normal file
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@ -0,0 +1,71 @@
/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.bind;
import org.springframework.core.MethodParameter;
/**
* {@link ServletRequestBindingException} subclass that indicates that a path
* variable expected in the method parameters of an {@code @RequestMapping}
* method is not present among the URI variables extracted from the URL.
* Typically that means the URI template does not match the path variable name
* declared on the method parameter.
*
* @author Rossen Stoyanchev
* @since 4.2
*/
@SuppressWarnings("serial")
public class MissingPathVariableException extends ServletRequestBindingException {
private final String variableName;
private final MethodParameter parameter;
/**
* Constructor for MissingPathVariableException.
* @param variableName the name of the missing path variable
* @param parameter the method parameter
*/
public MissingPathVariableException(String variableName, MethodParameter parameter) {
super("");
this.variableName = variableName;
this.parameter = parameter;
}
@Override
public String getMessage() {
return "Missing URI template variable '" + this.variableName +
"' for method parameter of type " + parameter.getParameterType().getSimpleName();
}
/**
* Return the expected name of the path variable.
*/
public final String getVariableName() {
return this.variableName;
}
/**
* Return the method parameter bound to the path variable.
*/
public final MethodParameter getParameter() {
return this.parameter;
}
}

10
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/PathVariableMethodArgumentResolver.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2014 the original author or authors.
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -25,6 +25,7 @@ import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.Converter;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.PathVariable;
@ -101,9 +102,10 @@ public class PathVariableMethodArgumentResolver extends AbstractNamedValueMethod
}
@Override
protected void handleMissingValue(String name, MethodParameter parameter) throws ServletRequestBindingException {
throw new ServletRequestBindingException("Missing URI template variable '" + name +
"' for method parameter of type " + parameter.getParameterType().getSimpleName());
protected void handleMissingValue(String name, MethodParameter parameter)
throws ServletRequestBindingException {
throw new MissingPathVariableException(name, parameter);
}
@Override

24
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandler.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2013 the original author or authors.
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -37,6 +37,7 @@ import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.annotation.ControllerAdvice;
@ -96,6 +97,7 @@ public abstract class ResponseEntityExceptionHandler {
HttpRequestMethodNotSupportedException.class,
HttpMediaTypeNotSupportedException.class,
HttpMediaTypeNotAcceptableException.class,
MissingPathVariableException.class,
MissingServletRequestParameterException.class,
ServletRequestBindingException.class,
ConversionNotSupportedException.class,
@ -127,6 +129,10 @@ public abstract class ResponseEntityExceptionHandler {
HttpStatus status = HttpStatus.NOT_ACCEPTABLE;
return handleHttpMediaTypeNotAcceptable((HttpMediaTypeNotAcceptableException) ex, headers, status, request);
}
else if (ex instanceof MissingPathVariableException) {
HttpStatus status = HttpStatus.INTERNAL_SERVER_ERROR;
return handleMissingPathVariable((MissingPathVariableException) ex, headers, status, request);
}
else if (ex instanceof MissingServletRequestParameterException) {
HttpStatus status = HttpStatus.BAD_REQUEST;
return handleMissingServletRequestParameter((MissingServletRequestParameterException) ex, headers, status, request);
@ -270,6 +276,22 @@ public abstract class ResponseEntityExceptionHandler {
return handleExceptionInternal(ex, null, headers, status, request);
}
/**
* Customize the response for MissingPathVariableException.
* This method delegates to {@link #handleExceptionInternal(Exception, Object, HttpHeaders, HttpStatus, WebRequest)}.
* @param ex the exception
* @param headers the headers to be written to the response
* @param status the selected response status
* @param request the current request
* @return a {@code ResponseEntity} instance
* @since 4.2
*/
protected ResponseEntity<Object> handleMissingPathVariable(MissingPathVariableException ex,
HttpHeaders headers, HttpStatus status, WebRequest request) {
return handleExceptionInternal(ex, null, headers, status, request);
}
/**
* Customize the response for MissingServletRequestParameterException.
* This method delegates to {@link #handleExceptionInternal(Exception, Object, HttpHeaders, HttpStatus, WebRequest)}.

27
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolver.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2013 the original author or authors.
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -38,6 +38,7 @@ import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.annotation.ModelAttribute;
@ -119,6 +120,10 @@ public class DefaultHandlerExceptionResolver extends AbstractHandlerExceptionRes
return handleHttpMediaTypeNotAcceptable((HttpMediaTypeNotAcceptableException) ex, request, response,
handler);
}
else if (ex instanceof MissingPathVariableException) {
return handleMissingPathVariable((MissingPathVariableException) ex, request,
response, handler);
}
else if (ex instanceof MissingServletRequestParameterException) {
return handleMissingServletRequestParameter((MissingServletRequestParameterException) ex, request,
response, handler);
@ -247,6 +252,26 @@ public class DefaultHandlerExceptionResolver extends AbstractHandlerExceptionRes
return new ModelAndView();
}
/**
* Handle the case when a declared path variable does not match any extracted URI variable.
* <p>The default implementation sends an HTTP 500 error, and returns an empty {@code ModelAndView}.
* Alternatively, a fallback view could be chosen, or the MissingPathVariableException
* could be rethrown as-is.
* @param ex the MissingPathVariableException to be handled
* @param request current HTTP request
* @param response current HTTP response
* @param handler the executed handler
* @return an empty ModelAndView indicating the exception was handled
* @throws IOException potentially thrown from response.sendError()
* @since 4.2
*/
protected ModelAndView handleMissingPathVariable(MissingPathVariableException ex,
HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, ex.getMessage());
return new ModelAndView();
}
/**
* Handle the case when a required parameter is missing.
* <p>The default implementation sends an HTTP 400 error, and returns an empty {@code ModelAndView}.

13
spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/PathVariableMethodArgumentResolverTests.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -16,6 +16,8 @@
package org.springframework.web.servlet.mvc.method.annotation;
import static org.junit.Assert.*;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
@ -26,15 +28,13 @@ import org.junit.Test;
import org.springframework.core.MethodParameter;
import org.springframework.mock.web.test.MockHttpServletRequest;
import org.springframework.mock.web.test.MockHttpServletResponse;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.method.support.ModelAndViewContainer;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.View;
import static org.junit.Assert.*;
/**
* Test fixture with {@link PathVariableMethodArgumentResolver}.
*
@ -96,7 +96,7 @@ public class PathVariableMethodArgumentResolverTests {
uriTemplateVars.put("name", "value");
request.setAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, uriTemplateVars);
Map<String, Object> pathVars = new HashMap<String, Object>();
Map<String, Object> pathVars;
uriTemplateVars.put("oldName", "oldValue");
request.setAttribute(View.PATH_VARIABLES, uriTemplateVars);
@ -110,12 +110,13 @@ public class PathVariableMethodArgumentResolverTests {
assertEquals("oldValue", pathVars.get("oldName"));
}
@Test(expected = ServletRequestBindingException.class)
@Test(expected = MissingPathVariableException.class)
public void handleMissingValue() throws Exception {
resolver.resolveArgument(paramNamedString, mavContainer, webRequest, null);
fail("Unresolved path variable should lead to exception.");
}
@SuppressWarnings("unused")
public void handle(@PathVariable(value = "name") String param1, String param2) {
}

23
spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandlerTests.java
View File

@ -26,6 +26,7 @@ import org.junit.Test;
import org.springframework.beans.ConversionNotSupportedException;
import org.springframework.beans.TypeMismatchException;
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
@ -41,6 +42,7 @@ import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.annotation.ControllerAdvice;
@ -86,15 +88,16 @@ public class ResponseEntityExceptionHandlerTests {
@Test
public void supportsAllDefaultHandlerExceptionResolverExceptionTypes() throws Exception {
Method annotMethod = ResponseEntityExceptionHandler.class.getMethod("handleException", Exception.class, WebRequest.class);
ExceptionHandler annot = annotMethod.getAnnotation(ExceptionHandler.class);
List<Class<? extends Throwable>> supportedTypes = Arrays.asList(annot.value());
Class<ResponseEntityExceptionHandler> clazz = ResponseEntityExceptionHandler.class;
Method handleExceptionMethod = clazz.getMethod("handleException", Exception.class, WebRequest.class);
ExceptionHandler annotation = handleExceptionMethod.getAnnotation(ExceptionHandler.class);
List<Class<?>> exceptionTypes = Arrays.asList(annotation.value());
for (Method method : DefaultHandlerExceptionResolver.class.getDeclaredMethods()) {
Class<?>[] paramTypes = method.getParameterTypes();
if (method.getName().startsWith("handle") && (paramTypes.length == 4)) {
String name = paramTypes[0].getSimpleName();
assertTrue("@ExceptionHandler is missing " + name, supportedTypes.contains(paramTypes[0]));
assertTrue("@ExceptionHandler is missing " + name, exceptionTypes.contains(paramTypes[0]));
}
}
}
@ -130,6 +133,14 @@ public class ResponseEntityExceptionHandlerTests {
testException(ex);
}
@Test
public void missingPathVariable() throws NoSuchMethodException {
Method method = getClass().getDeclaredMethod("handle", String.class);
MethodParameter parameter = new MethodParameter(method, 0);
Exception ex = new MissingPathVariableException("param", parameter);
testException(ex);
}
@Test
public void missingServletRequestParameter() {
Exception ex = new MissingServletRequestParameterException("param", "type");
@ -241,8 +252,10 @@ public class ResponseEntityExceptionHandlerTests {
headers.set("someHeader", "someHeaderValue");
return handleExceptionInternal(ex, "error content", headers, status, request);
}
}
@SuppressWarnings("unused")
void handle(String arg) {
}
}

16
spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolverTests.java
View File

@ -16,6 +16,7 @@
package org.springframework.web.servlet.mvc.support;
import java.lang.reflect.Method;
import java.util.Collections;
import org.junit.Before;
@ -36,6 +37,7 @@ import org.springframework.validation.BindException;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.multipart.support.MissingServletRequestPartException;
@ -93,6 +95,19 @@ public class DefaultHandlerExceptionResolverTests {
assertEquals("Invalid Accept header", "application/pdf", response.getHeader("Accept"));
}
@Test
public void handleMissingPathVariable() throws NoSuchMethodException {
Method method = getClass().getMethod("handle", String.class);
MethodParameter parameter = new MethodParameter(method, 0);
MissingPathVariableException ex = new MissingPathVariableException("foo", parameter);
ModelAndView mav = exceptionResolver.resolveException(request, response, null, ex);
assertNotNull("No ModelAndView returned", mav);
assertTrue("No Empty ModelAndView returned", mav.isEmpty());
assertEquals("Invalid status code", 500, response.getStatus());
assertEquals("Missing URI template variable 'foo' for method parameter of type String",
response.getErrorMessage());
}
@Test
public void handleMissingServletRequestParameter() {
MissingServletRequestParameterException ex = new MissingServletRequestParameterException("foo", "bar");
@ -196,6 +211,7 @@ public class DefaultHandlerExceptionResolverTests {
assertSame(ex, request.getAttribute("javax.servlet.error.exception"));
}
@SuppressWarnings("unused")
public void handle(String arg) {
}