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Check if Accept-Charset is present before adding it 

Closes gh-22506
This commit is contained in:
Rossen Stoyanchev 2019-05-08 09:40:32 -04:00
parent cdd346222c
commit 6e0dfd6999
1 changed files with 9 additions and 5 deletions
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14
spring-web/src/main/java/org/springframework/http/converter/StringHttpMessageConverter.java
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2018 the original author or authors.
* Copyright 2002-2019 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.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
@ -72,7 +73,9 @@ public class StringHttpMessageConverter extends AbstractHttpMessageConverter<Str
/**
* Indicates whether the {@code Accept-Charset} should be written to any outgoing request.
* Whether the {@code Accept-Charset} header should be written to any outgoing
* request sourced from the value of {@link Charset#availableCharsets()}.
* The behavior is suppressed if the header has already been set.
* <p>Default is {@code true}.
*/
public void setWriteAcceptCharset(boolean writeAcceptCharset) {
@ -99,10 +102,11 @@ public class StringHttpMessageConverter extends AbstractHttpMessageConverter<Str
@Override
protected void writeInternal(String str, HttpOutputMessage outputMessage) throws IOException {
if (this.writeAcceptCharset) {
outputMessage.getHeaders().setAcceptCharset(getAcceptedCharsets());
HttpHeaders headers = outputMessage.getHeaders();
if (this.writeAcceptCharset && headers.get(HttpHeaders.ACCEPT_CHARSET) == null) {
headers.setAcceptCharset(getAcceptedCharsets());
}
Charset charset = getContentTypeCharset(outputMessage.getHeaders().getContentType());
Charset charset = getContentTypeCharset(headers.getContentType());
StreamUtils.copy(str, charset, outputMessage.getBody());
}