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WSGI HTTP Server
This is a minimalistic WSGI server using Python's built-in BaseHTTPServer;
if pyOpenSSL is installed, it also provides SSL capabilities.
iN( t count( t BaseHTTPRequestHandlert
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When a client request includes a 'Expect: 100-continue' header, then
it is the responsibility of the server to send 100 Continue when it
is ready for the content body. This allows authentication, access
levels, and other exceptions to be detected *before* bandwith is
spent on the request body.
This is a rfile wrapper that implements this functionality by
sending 100 Continue to the client immediately after the user
requests the content via a read() operation on the rfile stream.
After this response is sent, it becomes a pass-through object.
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R R R ( s reads readlines readlines( R R R R R ( R R R ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt _ContinueFile_sendB s
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WSGI mix-in for HTTPRequestHandler
This class is a mix-in to provide WSGI functionality to any
HTTPRequestHandler derivative (as provided in Python's BaseHTTPServer).
This assumes a ``wsgi_application`` handler on ``self.server``.
c O s d S( s disable success request logging
Logging transactions should not be part of a WSGI server,
if you want logging; look at paste.translogger
N( ( R t argst kwargs( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt log_request_ s c O s d S( s disable error message logging
Logging transactions should not be part of a WSGI server,
if you want logging; look at paste.translogger
N( ( R R) R* ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt log_messageg s c C s( | i p | i S| i d | i Sd S( s. behavior that BaseHTTPServer should have had t N( t sys_versiont server_version( R ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt version_stringo s
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Write a chunk of the output stream; send headers if they
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Invoke the server's ``wsgi_application``.
RP NR s Internal Server Error
s 500 Internal Server Errors Content-types
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text/plain( R Rq t wsgi_applicationR} RM RI R3 R R RJ t sockett errorR R{ t lenR4 ( R R t resultR@ R t error_msg( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt wsgi_execute s0
!N( R& R' R( R6 R~ R+ R, R0 RI RJ RM R R R ( ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR U s " e ( t SSLt tsafet SecureHTTPServerc B s e Z d d d Z RS( c C s2 t i | | | | o | i i | n d S( N( R R R t listen( R Rr t RequestHandlerClasst ssl_contextt request_queue_size( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR E s N( R& R' RJ R ( ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR D s t
_ConnFixerc B s) e Z d Z d Z d Z d Z RS( s5 wraps a socket connection so it implements makefile c C s
| | _ d S( N( t _ConnFixer__conn( R t conn( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR O s c C s t i | i | | S( N( R t _fileobjectR ( R R R ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt makefileQ s c C s t | i | S( N( R R ( R t attrib( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt __getattr__S s ( R& R' R( R R R ( ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR M s c B s& e Z d Z d d d Z d Z RS( s
Provides SSL server functionality on top of the BaseHTTPServer
by overriding _private_ members of Python's standard
distribution. The interface for this instance only changes by
adding a an optional ssl_context attribute to the constructor:
cntx = SSL.Context(SSL.SSLv23_METHOD)
cntx.use_privatekey_file("host.pem")
cntx.use_certificate_file("host.pem")
c C s t i | | | t i | i | i | _ | | _ | o2 d t i f d Y} | | | i | _ n | i | o | i i | n | i
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c B s3 e Z d Z d e Z d Z d Z d Z RS( sy
A WSGI handler that overrides POST, GET and HEAD to delegate
requests to the server's ``wsgi_application``.
s PasteWSGIServer/c C sJ | i i | _ | i p d | _ d S| i p d S| i d S( s Handle a single HTTP request.
You normally don't need to override this method; see the class
__doc__ string for information on how to handle specific HTTP
commands such as GET and POST.
i N( R R t raw_requestlineR< t
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This is overridden so that no hostname lookup is done.
RP ( ( R ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR s ( R& R' R( t __version__R/ R R R ( ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR s
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ThreadPoolc B s e Z d Z e Z d e d d d d d d d d d d Z d Z d
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Generic thread pool with a queue of callables to consume.
Keeps a notion of the status of its worker threads:
idle: worker thread with nothing to do
busy: worker thread doing its job
hung: worker thread that's been doing a job for too long
dying: a hung thread that has been killed, but hasn't died quite
yet.
zombie: what was a worker thread that we've tried to kill but
isn't dead yet.
At any time you can call track_threads, to get a dictionary with
these keys and lists of thread_ids that fall in that status. All
keys will be present, even if they point to emty lists.
hung threads are threads that have been busy more than
hung_thread_limit seconds. Hung threads are killed when they live
longer than kill_thread_limit seconds. A thread is then
considered dying for dying_limit seconds, if it is still alive
after that it is considered a zombie.
When there are no idle workers and a request comes in, another
worker *may* be spawned. If there are less than spawn_if_under
threads in the busy state, another thread will be spawned. So if
the limit is 5, and there are 4 hung threads and 6 busy threads,
no thread will be spawned.
When there are more than max_zombie_threads_before_die zombie
threads, a SystemExit exception will be raised, stopping the
server. Use 0 or None to never raise this exception. Zombie
threads *should* get cleaned up, but killing threads is no
necessarily reliable. This is turned off by default, since it is
only a good idea if you've deployed the server with some process
watching from above (something similar to daemontools or zdaemon).
Each worker thread only processes ``max_requests`` tasks before it
dies and replaces itself with a new worker thread.
R id i i i, i i c
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Create thread pool with `nworkers` worker threads.
s paste.httpserver.ThreadPooli sB Cannot use kill_thread_limit as ctypes/killthread is not availableRD s Initial worker poolN(" t nworkerst max_requestst namet Queuet queuet workerst daemonRJ t loggingt getLoggert
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dying_threadst _last_added_new_idle_workerst atexitt registert shutdownt ranget add_worker_thread( R R R R R R R R R R R R R t i( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR 1 sB
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Add a task to the queue
s Added task (%i tasks queued)i i sB No idle workers for task; checking if we need to make more workerst thread_ids= No idle tasks, and only %s busy tasks; adding %s more workersRD s Response to lack of idle workerss) No extra workers needed (%s busy workers)i s2 Culling %s extra workers (%s idle workers present)s Idle workers: %sN( NN( R t debugR t qsizeR R t kill_hung_threadsR R R R R R Rt R RJ R R R R R
R R t putt SHUTDOWN( R t taskt busyt nowt workert time_startedR R ( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyt add_tasko sT
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Return a dict summarizing the threads in the pool (as
described in the ThreadPool docstring).
t idleR t hungt dyingt zombieR s! Killed thread %s no longer aroundN( NN( t dictR R R R Rt R RJ R t appendR R t
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c C s t d j o t d n t i i | } t i | t y | i | =Wn t j
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Removes the worker with the given thread_id from the pool, and
replaces it with a new worker thread.
This should only be done for mis-behaving workers.
s3 Cannot kill worker; killthread/ctypes not availables Killing thread %sRD s Replacement for killed thread %sN( R RJ R5 t threadingt _activeRt t async_raiset
SystemExitR R" R R R t removeR R R
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Returns true if a thread with this id is still running
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c C s | i p d St i } d } d } d } d } d } d } xp| i D]e} t | d p | d 7} qI n | i i | i d \ } }
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Tries to kill any hung threads
Ni R i s/ Thread %s hung (working on task for %i seconds)iR s Error:
%ss Killing worker thread (id=%(thread_id)s) because it has been
working on task for %(time)s seconds (limit is %(limit)s)
Info on task:
%(info)sR t limitR s %.2fsecs N/Asx kill_hung_threads status: %s threads (%s working, %s idle, %s starting) ave time %s, max time %.2fsec, killed %s workers( NN( R R R R R Rt R RJ t maxR t warningt pprintt pformatt StringIOt tracebackt print_exct getvaluet notify_problemR R+ t floatR t check_max_zombies( R R t max_timet
total_timeR t starting_workerst working_workerst killed_workersR R R R5 t info_desct outt ave_time( ( s4 /usr/lib/python2.6/site-packages/paste/httpserver.pyR sf
c C sq | i p d Sg } t i } x | i i D]r \ } \ } } | i | p+ y | i | =Wq1 t j
o q1 Xq1 n | | | i j o | i | q1 q1 W| o | i i d | n t
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Check if we've reached max_zombie_threads_before_die; if so
then kill the entire process.
Ns Found %s zombie threadss? Exiting process because %s zombie threads is more than %s limitsm Exiting process because %(found)s zombie threads (more than limit of %(limit)s)
Bad threads (ids):
%(ids)s
t foundR2 t idss
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s
Shutting downi ( R R R R R! R" R R R R R t fatalR; R R t mapR{ R R% t
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c C s t i } t i } | _ | i i | | i i | d } t } | i i
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o n Xt i X| i i | qg WWd y | i | =Wn t j
o n Xy | i i | Wn t j
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Worker thread should call this method to get and process queued
callables.
i s Started new worker %s: %ss; Thread %s processed %i requests (limit %s); stopping threads Worker %s asked to SHUTDOWNi s! Unexpected exception in worker %rNRD s# Voluntary replacement for thread %s( R% RK R R R R R R R; R R R6 R R Rt R R R) Ru R RJ R Rx Ry R8 R9 R R" t exc_clearR
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c C s | i i d x0 t t | i D] } | i i t i q& Wg } x< | i D]1 } | i d | i
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Shutdown the queue (after finishing any pending requests).
s Shutting down threadpoolg ?s/ %s workers didn't stop properly, and %s zombiess Workers killed forcefullys Worker %s won't dieiNi t im_funct func_globalsR& R% s Forcefully exiting processi s All workers eventually killeds All workers stopped( R R R R R R R R R R t isAliveR R R! R+ R R; t boolR6 R t listt
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Called when there's a substantial problem. msg contains the
body of the notification, subject the summary.
If spawn_thread is true, then the email will be send in
another thread (so this doesn't block).
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Error:
%(msg)s
Occurred at: %(time)s
PID: %(pid)s
System: %(system)s
Server .py file: %(file)s
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Mix-in class to process requests from a thread pool
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Queue the request to be processed by on of the thread pool threads
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The worker thread should call back here to do the rest of the
request processing. Error handling normaller done in 'handle_request'
must be done here.
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Overrides `serve_forever` to shut the threadpool down cleanly.
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Overrides server_activate to set timeout on our listener socket.
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Finish pending requests and shutdown the server.
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Raised to tell the server to really exit (SystemExit is normally
caught)
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Serves your ``application`` over HTTP(S) via WSGI interface
``host``
This is the ipaddress to bind to (or a hostname if your
nameserver is properly configured). This defaults to
127.0.0.1, which is not a public interface.
``port``
The port to run on, defaults to 8080 for HTTP, or 4443 for
HTTPS. This can be a string or an integer value.
``handler``
This is the HTTP request handler to use, it defaults to
``WSGIHandler`` in this module.
``ssl_pem``
This an optional SSL certificate file (via OpenSSL). You can
supply ``*`` and a development-only certificate will be
created for you, or you can generate a self-signed test PEM
certificate file as follows::
$ openssl genrsa 1024 > host.key
$ chmod 400 host.key
$ openssl req -new -x509 -nodes -sha1 -days 365 \
-key host.key > host.cert
$ cat host.cert host.key > host.pem
$ chmod 400 host.pem
``ssl_context``
This an optional SSL context object for the server. A SSL
context will be automatically constructed for you if you supply
``ssl_pem``. Supply this to use a context of your own
construction.
``server_version``
The version of the server as reported in HTTP response line. This
defaults to something like "PasteWSGIServer/0.5". Many servers
hide their code-base identity with a name like 'Amnesiac/1.0'
``protocol_version``
This sets the protocol used by the server, by default
``HTTP/1.0``. There is some support for ``HTTP/1.1``, which
defaults to nicer keep-alive connections. This server supports
``100 Continue``, but does not yet support HTTP/1.1 Chunked
Encoding. Hence, if you use HTTP/1.1, you're somewhat in error
since chunked coding is a mandatory requirement of a HTTP/1.1
server. If you specify HTTP/1.1, every response *must* have a
``Content-Length`` and you must be careful not to read past the
end of the socket.
``start_loop``
This specifies if the server loop (aka ``server.serve_forever()``)
should be called; it defaults to ``True``.
``daemon_threads``
This flag specifies if when your webserver terminates all
in-progress client connections should be droppped. It defaults
to ``False``. You might want to set this to ``True`` if you
are using ``HTTP/1.1`` and don't set a ``socket_timeout``.
``socket_timeout``
This specifies the maximum amount of time that a connection to a
given client will be kept open. At this time, it is a rude
disconnect, but at a later time it might follow the RFC a bit
more closely.
``use_threadpool``
Server requests from a pool of worker threads (``threadpool_workers``)
rather than creating a new thread for each request. This can
substantially reduce latency since there is a high cost associated
with thread creation.
``threadpool_workers``
Number of worker threads to create when ``use_threadpool`` is true. This
can be a string or an integer value.
``threadpool_options``
A dictionary of options to be used when instantiating the
threadpool. See paste.httpserver.ThreadPool for specific
options (``threadpool_workers`` is a specific option that can
also go here).
``request_queue_size``
The 'backlog' argument to socket.listen(); specifies the
maximum number of queued connections.
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