[tomcat] branch 9.0.x updated: Simplify and enhance charset extraction from content type (#662)

[markt]

This is an automated email from the ASF dual-hosted git repository.

markt pushed a commit to branch 9.0.x
in repository https://gitbox.apache.org/repos/asf/tomcat.git


The following commit(s) were added to refs/heads/9.0.x by this push:
     new 6691ad1b22 Simplify and enhance charset extraction from content type 
(#662)
6691ad1b22 is described below

commit 6691ad1b22ee8fe190a8c2ca7594d689950341a4
Author: wyc <rltgjqmduftl...@gmail.com>
AuthorDate: Thu Sep 7 05:24:04 2023 +0900

    Simplify and enhance charset extraction from content type (#662)
    
    Using MediaType to comply with specifications
---
 java/org/apache/coyote/Request.java | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/java/org/apache/coyote/Request.java 
b/java/org/apache/coyote/Request.java
index 0520140ef6..903b5e2804 100644
--- a/java/org/apache/coyote/Request.java
+++ b/java/org/apache/coyote/Request.java
@@ -17,6 +17,7 @@
 package org.apache.coyote;
 
 import java.io.IOException;
+import java.io.StringReader;
 import java.io.UnsupportedEncodingException;
 import java.nio.charset.Charset;
 import java.util.HashMap;
@@ -31,6 +32,7 @@ import org.apache.tomcat.util.buf.UDecoder;
 import org.apache.tomcat.util.http.MimeHeaders;
 import org.apache.tomcat.util.http.Parameters;
 import org.apache.tomcat.util.http.ServerCookies;
+import org.apache.tomcat.util.http.parser.MediaType;
 import org.apache.tomcat.util.net.ApplicationBufferHandler;
 import org.apache.tomcat.util.res.StringManager;
 
@@ -790,20 +792,17 @@ public final class Request {
         if (contentType == null) {
             return null;
         }
-        int start = contentType.indexOf("charset=");
-        if (start < 0) {
-            return null;
-        }
-        String encoding = contentType.substring(start + 8);
-        int end = encoding.indexOf(';');
-        if (end >= 0) {
-            encoding = encoding.substring(0, end);
+
+        MediaType mediaType = null;
+        try {
+            mediaType = MediaType.parseMediaType(new 
StringReader(contentType));
+        } catch (IOException e) {
+            // Ignore - null test below handles this
         }
-        encoding = encoding.trim();
-        if (encoding.length() > 2 && encoding.startsWith("\"") && 
encoding.endsWith("\"")) {
-            encoding = encoding.substring(1, encoding.length() - 1);
+        if (mediaType != null) {
+            return mediaType.getCharset();
         }
 
-        return encoding.trim();
+        return null;
     }
 }


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