maskit commented on a change in pull request #2888: PIP-25: Token based 
authentication
URL: https://github.com/apache/pulsar/pull/2888#discussion_r236862629
 
 

 ##########
 File path: 
pulsar-common/src/main/java/org/apache/pulsar/client/api/url/DataURLStreamHandler.java
 ##########
 @@ -57,20 +60,23 @@ public void connect() throws IOException {
             if (this.uri == null) {
                 throw new IOException();
             }
-            Pattern pattern = Pattern.compile(
-                    
"(?<mimeType>.+?)(;(?<charset>charset=.+?))?(;(?<base64>base64?))?,(?<data>.+)",
 Pattern.DOTALL);
+
             Matcher matcher = 
pattern.matcher(this.uri.getSchemeSpecificPart());
             if (matcher.matches()) {
                 this.contentType = matcher.group("mimeType");
-                String charset = matcher.group("charset");
-                if (charset == null) {
-                    charset = "US-ASCII";
+                if (contentType == null) {
+                    this.contentType = "application/data";
                 }
+
+                for (int i =0; i < matcher.groupCount(); i++) {
+                    System.out.println("Group: " + matcher.group(i));
+                }
+
                 if (matcher.group("base64") == null) {
                     // Support Urlencode but not decode here because already 
decoded by URI class.
-                    this.data = new String(matcher.group("data").getBytes(), 
charset);
+                    this.data = matcher.group("data").getBytes();
 
 Review comment:
   Yeah, I can see that, and we shoud fix that part. So this would be out of 
this PR’s scope but we need to return charset as a part of contentType so that 
URL class users can convert the data into String after reading the raw data 
from InputStream. I think we can do this by removing charset part from the 
regex.

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