Protocol libraries the right way
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Protocol libraries the right way
- Building Protocol Libraries The Right Way
- Hi!
- Python HTTP • Hyper • h2, hpack, priority, etc. • Requests + urllib3 • PyCA (PyOpenSSL)
- Why All Your Libraries Are Garbage, And All But One Of Mine Are Too
- Python HTTP Rocks
- • Requests/urllib3/HTTPie • gunicorn • aiohttp • Twisted • Tornado
- ~0% Shared Code
- Code Re-Use 👍
- I/O
- • httplib: state machine and parser mixed with I/O • aiohttp/Tornado/Twisted: state machine and parser use concurrency primitives
- Choice of I/O limits choice of libraries
- So What?
- Wasted Effort
- Reduces Experimentation
- Duplicate Bugs
- Limits Optimisation
- Avoiding This Problem
- Don’t Do I/O
- Alternative API events = handle_data(in_bytes) out_bytes = perform_action()
- Not All-Purpose
- Build Wrappers
- Why Bother?
- ============================= test session starts ============================== platform darwin -- Python 2.7.11, pytest-2.8.5, py-1.4.31, pluggy-0.3.1 rootdir: /Users/cory/Documents/Python/hyper-h2, inifile: plugins: hypothesis-1.19.0, cov-2.2.0, xdist-1.13.1 gw0 [513] / gw1 [513] / gw2 [513] / gw3 [513] scheduling tests via LoadScheduling ............................................................................................. ............................................................................................. ............................................................................................. ............................................................................................. ............................................................................................. ................................................ --------------- coverage: platform darwin, python 2.7.11-final-0 --------------- Name Stmts Miss Branch BrPart Cover Missing ---------------------------------------------------------------- h2/__init__.py 2 0 0 0 100% h2/connection.py 425 0 96 0 100% h2/errors.py 17 0 0 0 100% h2/events.py 95 0 4 0 100% h2/exceptions.py 41 0 0 0 100% h2/frame_buffer.py 55 0 18 0 100% h2/settings.py 74 0 20 0 100% h2/stream.py 286 0 46 0 100% h2/utilities.py 45 0 24 0 100% ---------------------------------------------------------------- TOTAL 1040 0 208 0 100% ========================== 513 passed in 6.69 seconds ==========================
- I/O Is Application- Specific
- Build A Toolbox
- Example • hyper-h2, a pure Python HTTP/2 protocol stack. • http://python-hyper.org/h2
- Help Us
- Thanks! Questions?