Convert examples and example tests for new-style scripts

Remove the test that just loads all the example scripts for now - it's a very
low-value test, and we need to think of something better.

examples/custom_contentviews.py

@@ -62,7 +62,7 @@ class ViewPigLatin(contentviews.View):
 pig_view = ViewPigLatin()
 
 
-def start():
+def configure(options):
     contentviews.add(pig_view)
 
 

examples/filt.py

@@ -6,7 +6,7 @@ from mitmproxy import filt
 state = {}
 
 
-def start():
+def configure(options):
     if len(sys.argv) != 2:
         raise ValueError("Usage: -s 'filt.py FILTER'")
     state["filter"] = filt.parse(sys.argv[1])

examples/flowwriter.py

@@ -6,7 +6,7 @@ from mitmproxy.flow import FlowWriter
 state = {}
 
 
-def start():
+def configure(options):
     if len(sys.argv) != 2:
         raise ValueError('Usage: -s "flowriter.py filename"')
 

examples/har_extractor.py

@@ -61,7 +61,7 @@ class Context(object):
 context = Context()
 
 
-def start():
+def configure(options):
     """
         On start we create a HARLog instance. You will have to adapt this to
         suit your actual needs of HAR generation. As it will probably be

examples/iframe_injector.py

@@ -7,7 +7,7 @@ from mitmproxy.models import decoded
 iframe_url = None
 
 
-def start():
+def configure(options):
     if len(sys.argv) != 2:
         raise ValueError('Usage: -s "iframe_injector.py url"')
     global iframe_url

examples/modify_response_body.py

@@ -8,7 +8,7 @@ from mitmproxy.models import decoded
 state = {}
 
 
-def start():
+def configure(options):
     if len(sys.argv) != 3:
         raise ValueError('Usage: -s "modify_response_body.py old new"')
     # You may want to use Python's argparse for more sophisticated argument

examples/proxapp.py

@@ -16,7 +16,7 @@ def hello_world():
 
 # Register the app using the magic domain "proxapp" on port 80. Requests to
 # this domain and port combination will now be routed to the WSGI app instance.
-def start():
+def configure(options):
     mitmproxy.ctx.master.apps.add(app, "proxapp", 80)
 
     # SSL works too, but the magic domain needs to be resolvable from the mitmproxy machine due to mitmproxy's design.

examples/stub.py

@@ -4,11 +4,11 @@ import mitmproxy
 """
 
 
-def start():
+def configure(options):
     """
-        Called once on script startup, before any other events.
+        Called once on script startup before any other events, and whenever options changes.
     """
-    mitmproxy.ctx.log("start")
+    mitmproxy.ctx.log("configure")
 
 
 def clientconnect(root_layer):

examples/tls_passthrough.py

@@ -113,7 +113,7 @@ class TlsFeedback(TlsLayer):
 tls_strategy = None
 
 
-def start():
+def configure(options):
     global tls_strategy
     if len(sys.argv) == 2:
         tls_strategy = ProbabilisticStrategy(float(sys.argv[1]))