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Allow to specify AbstractHttpMessageConverter default charset

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Before this commit, specifying the charset to use with produces or
consumes @RequestMapping attributes resulted in default charset
loss. That was really annoying for JSON for example, where using
UTF-8 charset is mandatory in a lot of use cases.

This commit adds a defaultCharset property to
AbstractHttpMessageConverter in order to avoid losing the
default charset when specifying the charset with these
@RequestMapping attributes.

It changes slightly the default behavior (that's why we have waited
4.3), but it is much more error prone, and will match with most
user's expectations since the charset loss was accidental in most
use cases (users usually just want to limit the media type supported
by a specific handler method).

Issue: SPR-13631
This commit is contained in:
Sebastien Deleuze
2016-02-23 10:27:39 +01:00
parent 61824b1ade
commit c385427397
15 changed files with 114 additions and 42 deletions
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26
spring-core/src/main/java/org/springframework/util/MimeType.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2015 the original author or authors.
* Copyright 2002-2016 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.
@@ -22,6 +22,7 @@ import java.util.BitSet;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
@@ -126,11 +127,28 @@ public class MimeType implements Comparable<MimeType>, Serializable {
* Create a new {@code MimeType} for the given type, subtype, and character set.
* @param type the primary type
* @param subtype the subtype
* @param charSet the character set
* @param charset the character set
* @throws IllegalArgumentException if any of the parameters contains illegal characters
*/
public MimeType(String type, String subtype, Charset charSet) {
this(type, subtype, Collections.singletonMap(PARAM_CHARSET, charSet.name()));
public MimeType(String type, String subtype, Charset charset) {
this(type, subtype, Collections.singletonMap(PARAM_CHARSET, charset.name()));
}
/**
* Copy-constructor that copies the type, subtype, parameters of the given {@code MimeType},
* and allows to set the specified character set.
* @param other the other media type
* @param charset the character set
* @throws IllegalArgumentException if any of the parameters contains illegal characters
*/
public MimeType(MimeType other, Charset charset) {
this(other.getType(), other.getSubtype(), addCharsetParameter(charset, other.getParameters()));
}
private static Map<String, String> addCharsetParameter(Charset charset, Map<String, String> parameters) {
Map<String, String> map = new LinkedHashMap<String, String>(parameters);
map.put(PARAM_CHARSET, charset.name());
return map;
}
/**