flup

library1.0.3pypypi✓ verified 85d ago

A random assortment of WSGI server implementations (CGI, FastCGI, SCGI, AJP) for Python 3. Version 1.0.3 is the latest, released in 2019. The project is in maintenance mode with no active development.

web-framework http-networking

pip install flup

package ↗homepage ↗

INSTALL

IMPORT

SIG · FLUP

flup

web-frameworkpythonv1.0.3

Install

1.5s avg

Import

—

Disk

16MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.0.3 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.000s · 18.2MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.5s · import 0.000s · 19MB

16MB installed

● package 16MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

CGIServer

✓ from flup.server.cgi import WSGIServer as CGIServer

✗ from flup.server.cgi import CGIHandler

CGIHandler is for old CGI scripts, not WSGI; use CGIServer for WSGI+CGI.

FastCGIServer

✓ from flup.server.fcgi import WSGIServer as FastCGIServer

✗ from flup.server.fcgi import FCGIServer

Old name; the correct class is WSGIServer.

SCGIServer

✓ from flup.server.scgi import WSGIServer as SCGIServer

✗ from flup.server.scgi import SCGIServer

The old import path used WSGIServer as the class name, but SCGIServer is also accepted; prefer the modern WSGIServer alias.

AJPServer

✓ from flup.server.ajp import WSGIServer as AJPServer

✗ from flup.server.ajp import AjpServer

Case sensitivity: correct class is WSGIServer.

Basic FastCGI server example using flup. The server listens on localhost:8080.

from flup.server.fcgi import WSGIServer def app(environ, start_response): start_response('200 OK', [('Content-Type', 'text/plain')]) return [b'Hello, World!'] server = WSGIServer(app, bindAddress=('127.0.0.1', 8080)) server.run()

Debug

Known issues

gotchaImport paths differ between versions: in flup < 1.0, classes were directly under flup.server.* (e.g. flup.server.fcgi.FCGIServer); in 1.0+, use flup.server.*.WSGIServer.

fix

Use 'from flup.server.fcgi import WSGIServer' instead of 'from flup.server.fcgi import FCGIServer'.

affects: >=1.0.0

gotchaThe server's run() method is blocking; to integrate with async frameworks, you need to manage threading yourself.

fix

Wrap the server.run() in a thread if you need non-blocking operation.

affects: *

deprecatedFlup has no official Python 3 support beyond basic CGI. The package is unmaintained; consider alternatives like gunicorn or uWSGI.

fix

Migrate to gunicorn (pip install gunicorn) or uWSGI for production use.

affects: *

gotchaWhen using FastCGI, the bindAddress must be a Unix socket or TCP tuple. Using a string (e.g., '127.0.0.1:8080') will raise an error.

fix

Use a tuple: bindAddress=('127.0.0.1', 8080) or a Unix socket path.

affects: *

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'flup'

Flup is not installed in the current Python environment.

fix

Run 'pip install flup'.

AttributeError: module 'flup.server.fcgi' has no attribute 'FCGIServer'

In flup 1.0+, the class is named WSGIServer, not FCGIServer.

fix

Use 'from flup.server.fcgi import WSGIServer' instead.

TypeError: WSGIServer.__init__() got an unexpected keyword argument 'bindAddress'

The keyword argument may be misspelled or not accepted in some older version; check the signature.

fix

Use positional arguments or consult the documentation: WSGIServer(app, bindAddress=...). Ensure you are using flup 1.0+.

OSError: [Errno 98] Address already in use

The specified bind address/port is already occupied by another process.

fix

Choose a different port or stop the conflicting process.

Upgrade

Version history

1.0.3latest on PyPI · released Feb 7, 2018

Audit

Dependencies

No dependency data recorded yet.

Agent activity

10 hits · last 30 days

node

Amazon

Resources

packagehttps://pypi.org/project/flup/ ↗

homepagehttp://www.saddi.com/software/flup/ ↗