[binding.homekit] Minor tweaks (#20209)

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>

Author: andrewfg

bundles/org.openhab.binding.homekit/src/main/java/org/openhab/binding/homekit/internal/HomekitBindingConstants.java

@@ -99,7 +99,7 @@ public class HomekitBindingConstants {
     public static final String CONFIG_SNAPSHOT_HEIGHT = "imageHeight";
 
     // pattern matcher for pairing code XXX-XX-XXX or XXXX-XXXX or XXXXXXXX
-    public static final Pattern PAIRING_CODE_PATTERN = Pattern.compile("\\d{3}-\\d{2}-\\d{3}|\\d{4}-\\d{4}|\\d{8}");
+    public static final Pattern PAIRING_CODE_PATTERN = Pattern.compile("^(\\d{3}-\\d{2}-\\d{3}|\\d{4}-\\d{4}|\\d{8})$");
 
     // pattern matcher for host ipv4 address 123.123.123.123:12345
     public static final Pattern IPV4_PATTERN = Pattern.compile(

bundles/org.openhab.binding.homekit/src/main/java/org/openhab/binding/homekit/internal/session/HttpPayloadParser.java

@@ -233,7 +233,7 @@ private void parseAvailable() throws IOException {
                     chunkDataBuffer.write(inputBuffer, inputStartIndex, remainingByteCount);
                     if (chunkDataBuffer.size() > MAX_CONTENT_LENGTH) {
                         throw new IOException("Chunked data size %d exceeds maximum allowed %d"
-                                .formatted(contentBuffer.size(), MAX_CONTENT_LENGTH));
+                                .formatted(chunkDataBuffer.size(), MAX_CONTENT_LENGTH));
                     }
                     inputStartIndex += remainingByteCount;
                     parseChunkedBytesFromStagingBuffer();