From 18474c921df8003c6ce778cc9ab9979dd29d428a Mon Sep 17 00:00:00 2001
From: Rossen Stoyanchev <rstoyanchev@pivotal.io>
Date: Fri, 24 Apr 2020 13:02:12 +0100
Subject: [PATCH] Document IAE in HttpHeaders methods that parse ETags

See gh-24950
---
 .../src/main/java/org/springframework/http/HttpHeaders.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/spring-web/src/main/java/org/springframework/http/HttpHeaders.java b/spring-web/src/main/java/org/springframework/http/HttpHeaders.java
index 68c4ab013c..eaf831696a 100644
--- a/spring-web/src/main/java/org/springframework/http/HttpHeaders.java
+++ b/spring-web/src/main/java/org/springframework/http/HttpHeaders.java
@@ -1140,6 +1140,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 
 	/**
 	 * Return the value of the {@code If-Match} header.
+	 * @throws IllegalArgumentException if parsing fails
 	 * @since 4.3
 	 */
 	public List<String> getIfMatch() {
@@ -1199,6 +1200,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 
 	/**
 	 * Return the value of the {@code If-None-Match} header.
+	 * @throws IllegalArgumentException if parsing fails
 	 */
 	public List<String> getIfNoneMatch() {
 		return getETagValuesAsList(IF_NONE_MATCH);
@@ -1542,6 +1544,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	 * Retrieve a combined result from the field values of the ETag header.
 	 * @param headerName the header name
 	 * @return the combined result
+	 * @throws IllegalArgumentException if parsing fails
 	 * @since 4.3
 	 */
 	protected List<String> getETagValuesAsList(String headerName) {