kallithea Files · rhodecode/lib/profiler.py

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3072935bdeed 1.5 KiB text/x-python Show Annotation Show as Raw Download as Raw

Marcin Kuzminski

rewrote whoosh indexing to run internal repository.walk() instead of filesystem.
Disabled default hg update hook (not needed since whoosh is not dependent on file system files to index)

from __future__ import with_statement

import cProfile
import pstats
import cgi
import pprint
import threading

from StringIO import StringIO

class ProfilingMiddleware(object):
    def __init__(self, app):
        self.lock = threading.Lock()
        self.app = app
    
    
    def __call__(self, environ, start_response):
        with self.lock:
            profiler = cProfile.Profile()
            def run_app(*a, **kw):
                self.response = self.app(environ, start_response)

            profiler.runcall(run_app, environ, start_response)

            profiler.snapshot_stats()

            stats = pstats.Stats(profiler)
            stats.sort_stats('cumulative')

            # Redirect output
            out = StringIO()
            stats.stream = out

            stats.print_stats()

            resp = ''.join(self.response)

            # Lets at least only put this on html-like responses.
            if resp.strip().startswith('<'):
                ## The profiling info is just appended to the response.
                ##  Browsers don't mind this.
                resp += '<pre style="text-align:left; border-top: 4px dashed red; padding: 1em;">'
                resp += cgi.escape(out.getvalue(), True)
                
                output = StringIO()
                pprint.pprint(environ, output, depth=3)
                
                resp += cgi.escape(output.getvalue(), True)
                resp += '</pre>'
                
            return resp