Initial.

Author: ahri

BappDescription.html

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+<p>This extension allows execution of a custom Python script on each HTTP 
+request and response processed by Burp.</p>
+<p>To use, type or paste a Python script into the &quot;Script&quot; tab, and use Burp in 
+the normal way. The script will be executed for each HTTP request and response. 
+The following variables are defined in the context of the script:</p>
+<ul>
+	<li>extender</li>
+	<li>callbacks</li>
+	<li>helpers</li>
+	<li>toolFlag</li>
+	<li>messageIsRequest</li>
+	<li>messageInfo</li>
+</ul>

BappManifest.bmf

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+Uuid: eb563ada801346e6bdb7a7d7c5c52583
+ExtensionType: 2
+Name: Python Scripter
+ScreenVersion: 1.0
+SerialVersion: 1
+MinPlatformVersion: 0
+ProOnly: False
+Author: Marcin Wielgoszewski
+ShortDescription: Allows execution of a custom Python script on each HTTP request and response.
+EntryPoint: burpscript.py

README.md

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+Sourced from gist: https://gist.github.com/mwielgoszewski/7026954

burpscript.py

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+from java.awt import Font
+from javax.swing import JScrollPane, JTextPane
+from javax.swing.text import SimpleAttributeSet
+
+from burp import IBurpExtender, IExtensionStateListener, IHttpListener, ITab
+
+import base64
+import traceback
+
+
+class BurpExtender(IBurpExtender, IExtensionStateListener, IHttpListener, ITab):
+    def registerExtenderCallbacks(self, callbacks):
+        self.callbacks = callbacks
+        self.helpers = callbacks.helpers
+
+        self.scriptpane = JTextPane()
+        self.scriptpane.setFont(Font('Monospaced', Font.PLAIN, 11))
+
+        self.scrollpane = JScrollPane()
+        self.scrollpane.setViewportView(self.scriptpane)
+
+        self._code = compile('', '<string>', 'exec')
+        self._script = ''
+
+        script = callbacks.loadExtensionSetting('script')
+
+        if script:
+            script = base64.b64decode(script)
+
+            self.scriptpane.document.insertString(
+                    self.scriptpane.document.length,
+                    script,
+                    SimpleAttributeSet())
+
+            self._script = script
+            self._code = compile(script, '<string>', 'exec')
+
+        callbacks.registerExtensionStateListener(self)
+        callbacks.registerHttpListener(self)
+        callbacks.customizeUiComponent(self.getUiComponent())
+        callbacks.addSuiteTab(self)
+
+        self.scriptpane.requestFocus()
+
+    def extensionUnloaded(self):
+        try:
+            self.callbacks.saveExtensionSetting(
+                    'script', base64.b64encode(self._script))
+        except Exception:
+            traceback.print_exc(file=self.callbacks.getStderr())
+        return
+
+    def processHttpMessage(self, toolFlag, messageIsRequest, messageInfo):
+        try:
+            globals_ = {}
+            locals_  = {'extender': self,
+                        'callbacks': self.callbacks,
+                        'helpers': self.helpers,
+                        'toolFlag': toolFlag,
+                        'messageIsRequest': messageIsRequest,
+                        'messageInfo': messageInfo
+                        }
+            exec(self.script, globals_, locals_)
+        except Exception:
+            traceback.print_exc(file=self.callbacks.getStderr())
+        return
+
+    def getTabCaption(self):
+        return 'Script'
+
+    def getUiComponent(self):
+        return self.scrollpane
+
+    @property
+    def script(self):
+        end = self.scriptpane.document.length
+        _script = self.scriptpane.document.getText(0, end)
+
+        if _script == self._script:
+            return self._code
+
+        self._script = _script
+        self._code = compile(_script, '<string>', 'exec')
+        return self._code