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MediaType parsing supports comma inside quotes

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Issue: SPR-17459
This commit is contained in:
Dimitrios Liapis
2018-11-07 00:03:20 +01:00
committed by Rossen Stoyanchev
parent 46a5fb7a91
commit f4b05dc2e7
4 changed files with 139 additions and 11 deletions
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23
spring-core/src/main/java/org/springframework/util/MimeTypeUtils.java
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@@ -37,6 +37,7 @@ import org.springframework.util.MimeType.SpecificityComparator;
*
* @author Arjen Poutsma
* @author Rossen Stoyanchev
* @author Dimitrios Liapis
* @since 4.0
*/
public abstract class MimeTypeUtils {
@@ -257,12 +258,24 @@ public abstract class MimeTypeUtils {
if (!StringUtils.hasLength(mimeTypes)) {
return Collections.emptyList();
}
String[] tokens = StringUtils.tokenizeToStringArray(mimeTypes, ",");
List<MimeType> result = new ArrayList<>(tokens.length);
for (String token : tokens) {
result.add(parseMimeType(token));
boolean isQuoted = false;
int nextBeginIndex = 0;
List<MimeType> tokens = new ArrayList<>();
for(int i = 0; i < mimeTypes.length() - 1; i++) {
//tokenizing on commas that are not within double quotes
if(mimeTypes.charAt(i) == ',' && !isQuoted) {
tokens.add(parseMimeType(mimeTypes.substring(nextBeginIndex,i)));
nextBeginIndex = i + 1;
//ignoring escaped double quote within double quotes
} else if(isQuoted && mimeTypes.charAt(i) == '"' && mimeTypes.charAt(i-1) == '\\') {
continue;
} else if(mimeTypes.charAt(i) == '"') {
isQuoted = !isQuoted;
}
}
return result;
//either the last part of the tokenization or the original string
tokens.add(parseMimeType(mimeTypes.substring(nextBeginIndex)));
return tokens;
}
/**

51
spring-core/src/test/java/org/springframework/util/MimeTypeTests.java
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@@ -36,6 +36,7 @@ import static org.junit.Assert.*;
* @author Arjen Poutsma
* @author Juergen Hoeller
* @author Sam Brannen
* @author Dimitrios Liapis
*/
public class MimeTypeTests {
@@ -276,6 +277,56 @@ public class MimeTypeTests {
assertEquals("Invalid amount of mime types", 0, mimeTypes.size());
}
// SPR-17459
@Test
public void parseMimeTypesWithOddNumberOfDoubleQuotedCommas() {
String s = "foo/bar;param=\",\"";
List<MimeType> mimeTypes = MimeTypeUtils.parseMimeTypes(s);
assertEquals("Invalid amount of mime types", 1, mimeTypes.size());
assertEquals("Comma should be part of the mime type", s, mimeTypes.get(0).toString());
}
// SPR-17459
@Test
public void parseMimeTypesWithEvenNumberOfDoubleQuotedCommas() {
String s = "foo/bar;param=\"s,a,\"";
List<MimeType> mimeTypes = MimeTypeUtils.parseMimeTypes(s);
assertEquals("Invalid amount of mime types", 1, mimeTypes.size());
assertEquals("Comma should be part of the mime type", s, mimeTypes.get(0).toString());
}
// SPR-17459
@Test
public void parseMimeTypesWithAndWithoutDoubleQuotedCommas() {
String s = "foo/bar;param=\"s,\", text/x-c";
List<MimeType> mimeTypes = MimeTypeUtils.parseMimeTypes(s);
assertEquals("Invalid amount of mime types", 2, mimeTypes.size());
assertEquals("Comma should be part of the mime type", "foo/bar;param=\"s,\"", mimeTypes.get(0).toString());
}
// SPR-17459
@Test
public void parseMimeTypesIgnoreEscapedDoubleQuoteWithinDoubleQuotes() {
String s = "foo/bar;param=\"a\\\"b,c\"";
List<MimeType> mimeTypes = MimeTypeUtils.parseMimeTypes(s);
assertEquals("Invalid amount of mime types", 1, mimeTypes.size());
assertEquals("Escaped quote within quotes should be ignored when considering comma tokenization", s, mimeTypes.get(0).toString());
}
// SPR-17459
@Test
public void parseMimeTypesIgnoreEscapedBackslash() {
String s = "foo/bar;param=\"\\\\\"";
List<MimeType> mimeTypes = MimeTypeUtils.parseMimeTypes(s);
assertEquals("Invalid amount of mime types", 1, mimeTypes.size());
assertEquals("Escaped backslash should be ignored when considering comma tokenization", s, mimeTypes.get(0).toString());
s = "foo/bar;param=\"\\,\\\"";
mimeTypes = MimeTypeUtils.parseMimeTypes(s);
assertEquals("Invalid amount of mime types", 1, mimeTypes.size());
assertEquals("Escaped backslash should be ignored when considering comma tokenization", s, mimeTypes.get(0).toString());
}
@Test
public void compareTo() {
MimeType audioBasic = new MimeType("audio", "basic");