Add sharedSession to prevent blocking session

master/buildbot/steps/http.py

@@ -67,11 +67,12 @@ class HTTPStep(BuildStep):
     renderables = requestsParams
     session = None
 
-    def __init__(self, url, method, description=None, descriptionDone=None, **kwargs):
+    def __init__(self, url, method, description=None, sharedSession=False, descriptionDone=None, **kwargs):
         if txrequests is None or requests is None:
             config.error("Need to install txrequest to use this step:\n\n pip install txrequests")
         self.method = method
         self.url = url
+        self.sharedSession = sharedSession
         self.requestkwargs = {'method': method, 'url': url}
         for p in HTTPStep.requestsParams:
             v = kwargs.pop(p, None)
@@ -118,6 +119,10 @@ def doRequest(self):
             log.addStderr('An exception occured while performing the request: %s' % e)
             self.finished(FAILURE)
             return
+        finally:
+            # close session if shared session is disabled
+            if not self.sharedSession:
+                closeSession()
 
         if r.history:
             log.addStdout('\nRedirected %d times:\n\n' % len(r.history))