u2c v0.7

https://support.portswigger.net/customer/en/portal/questions/17364782-a-bug-triggered-when-using-a-imessageeditortab-related-extension
fix a bug in proxy view when switch to "U2C" tab.
修复一个在proxy中会卡死的bug。

pom.xml

@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.bit4woo.burp</groupId>
   <artifactId>u2c</artifactId>
-  <version>0.6</version>
+  <version>0.7</version>
   <build>
     <sourceDirectory>src</sourceDirectory>
     <plugins>

src/U2C/U2CTab.java

@@ -13,12 +13,11 @@
 public class U2CTab implements IMessageEditorTab
 {
     private ITextEditor txtInput;
-    private IExtensionHelpers helpers;
+    private byte[] originContent;
     public U2CTab(IMessageEditorController controller, boolean editable, IExtensionHelpers helpers, IBurpExtenderCallbacks callbacks)
     {
         txtInput = callbacks.createTextEditor();
         txtInput.setEditable(editable);
-        this.helpers = helpers;
     }
 
     @Override
@@ -36,8 +35,9 @@ public Component getUiComponent()
     @Override
     public boolean isEnabled(byte[] content, boolean isRequest)
     {
-    	String resp= new String(content);
-    	if(!isRequest && needtoconvert(resp)) {
+
+    	if(content!=null && !isRequest && needtoconvert(new String(content))) {
+    		originContent = content;
     		return true;
     	}else {
     		return false;
@@ -48,33 +48,39 @@ public boolean isEnabled(byte[] content, boolean isRequest)
     @Override
     public void setMessage(byte[] content, boolean isRequest)
     {
-    	String resp= new String(content);
     	String UnicodeResp = "";
-    	if(needtoconvert(resp)) {
-    		UnicodeResp = Unicode.unicodeDecode(resp);
+    	if(content != null) {
+        	String resp= new String(content);
+        	if(needtoconvert(resp)) {
+        		UnicodeResp = Unicode.unicodeDecode(resp);
+        	}
     	}
     	txtInput.setText(UnicodeResp.getBytes());
     }
 
     @Override
     public byte[] getMessage()
     {
-    	byte[] text = txtInput.getText();
-        return text;
+    	//byte[] text = txtInput.getText();
+        //return text;
+    	return originContent;
+    	//change the return value of getMessage() method to the origin content to tell burp don't change the original response
+
     }
 
     @Override
     public boolean isModified()
     {
-        return txtInput.isTextModified();
+        //return txtInput.isTextModified();
+        return false;
+        //change the return value of isModified() method to false. to let burp don't change the original response) 
     }
 
     @Override
     public byte[] getSelectedData()
     {
         return txtInput.getSelectedText();
-    }       
-
+    }
 
 
     public static boolean needtoconvert(String str) {

src/burp/BurpExtender.java

@@ -7,7 +7,7 @@ public class BurpExtender implements IBurpExtender,IMessageEditorTabFactory
 	private IBurpExtenderCallbacks callbacks;
 	private IExtensionHelpers helpers;
 
-	public String ExtenderName = "U2C v0.6 by bit4";
+	public String ExtenderName = "U2C v0.7 by bit4";
 	public String github = "https://github.com/bit4woo/U2C";
 
 	@Override