Detect Jetty 12 "max length exceeded" message in handleParseFailure

Closes gh-31850

Author: jhoeller

spring-web/src/main/java/org/springframework/web/multipart/support/StandardMultipartHttpServletRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -112,13 +112,21 @@ private void parseRequest(HttpServletRequest request) {
 	}
 
 	protected void handleParseFailure(Throwable ex) {
-		String msg = ex.getMessage();
-		if (msg != null) {
-			msg = msg.toLowerCase();
-			if (msg.contains("size") && msg.contains("exceed")) {
-				throw new MaxUploadSizeExceededException(-1, ex);
+		// MaxUploadSizeExceededException ?
+		Throwable cause = ex;
+		do {
+			String msg = cause.getMessage();
+			if (msg != null) {
+				msg = msg.toLowerCase();
+				if (msg.contains("exceed") && (msg.contains("size") || msg.contains("length"))) {
+					throw new MaxUploadSizeExceededException(-1, ex);
+				}
 			}
+			cause = cause.getCause();
 		}
+		while (cause != null);
+
+		// General MultipartException
 		throw new MultipartException("Failed to parse multipart servlet request", ex);
 	}
 

spring-web/src/test/java/org/springframework/web/multipart/support/StandardMultipartHttpServletRequestTests.java

@@ -18,23 +18,29 @@
 
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.Collection;
 
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.Part;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.http.converter.FormHttpMessageConverter;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
+import org.springframework.web.multipart.MaxUploadSizeExceededException;
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.testfixture.http.MockHttpOutputMessage;
 import org.springframework.web.testfixture.servlet.MockHttpServletRequest;
 import org.springframework.web.testfixture.servlet.MockPart;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
 /**
  * Unit tests for {@link StandardMultipartHttpServletRequest}.
  *
  * @author Rossen Stoyanchev
+ * @author Juergen Hoeller
  */
 class StandardMultipartHttpServletRequestTests {
 
@@ -92,6 +98,31 @@ void multipartFileResource() throws IOException {
 				""".replace("\n", "\r\n"));
 	}
 
+	@Test
+	void plainSizeExceededServletException() {
+		ServletException ex = new ServletException("Request size exceeded");
+
+		assertThatExceptionOfType(MaxUploadSizeExceededException.class)
+				.isThrownBy(() -> requestWithException(ex)).withCause(ex);
+	}
+
+	@Test  // gh-28759
+	void jetty94MaxRequestSizeException() {
+		ServletException ex = new ServletException(new IllegalStateException("Request exceeds maxRequestSize"));
+
+		assertThatExceptionOfType(MaxUploadSizeExceededException.class)
+				.isThrownBy(() -> requestWithException(ex)).withCause(ex);
+	}
+
+	@Test  // gh-31850
+	void jetty12MaxLengthExceededException() {
+		ServletException ex = new ServletException(new RuntimeException("400: bad multipart",
+				new IllegalStateException("max length exceeded")));
+
+		assertThatExceptionOfType(MaxUploadSizeExceededException.class)
+				.isThrownBy(() -> requestWithException(ex)).withCause(ex);
+	}
+
 
 	private static StandardMultipartHttpServletRequest requestWithPart(String name, String disposition, String content) {
 		MockHttpServletRequest request = new MockHttpServletRequest();
@@ -101,4 +132,14 @@ private static StandardMultipartHttpServletRequest requestWithPart(String name,
 		return new StandardMultipartHttpServletRequest(request);
 	}
 
+	private static StandardMultipartHttpServletRequest requestWithException(ServletException ex) {
+		MockHttpServletRequest request = new MockHttpServletRequest() {
+			@Override
+			public Collection<Part> getParts() throws ServletException {
+				throw ex;
+			}
+		};
+		return new StandardMultipartHttpServletRequest(request);
+	}
+
 }