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#!/usr/bin/env python3
"""Run one document app through parser-free HTTP, source HTTP, and native CLI."""
import argparse
import hashlib
import http.client
import json
from pathlib import Path
import select
import socket
import struct
import subprocess
import tempfile
import time
HERE = Path(__file__).resolve().parent
PEAK_RSS_LIMIT_KIB = 4096
class Host:
def __init__(self, binary, store, fixed, budget=None, timeout_ms=10000):
args = [str(binary), '--store', str(store), '--port', '0',
'--send-buffer', '4096', '--timeout-ms', str(timeout_ms)]
if budget is not None:
args += ['--budget', str(budget)]
if not fixed:
args += ['--program', str(HERE / 'examples/editor.pure')]
self.process = subprocess.Popen(args, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
ready, _, _ = select.select([self.process.stdout], [], [], 10)
if not ready:
self.process.kill()
raise AssertionError('HTTP host did not become ready')
line = self.process.stdout.readline()
if not line:
raise AssertionError(self.process.communicate(timeout=5))
self.port = json.loads(line)['port']
def close(self):
self.process.terminate()
_, error = self.process.communicate(timeout=10)
assert self.process.returncode == 0, error[-1000:]
stats = json.loads(error)
assert stats['active'] == stats['retained_payload_bytes'] == 0
return stats
def request(host, method, key, body=b'', expected=None):
headers = {'Content-Length': str(len(body))}
if expected is not None:
headers['If-None-Match' if expected == 0 else 'If-Match'] = (
'*' if expected == 0 else f'"{expected}"')
connection = http.client.HTTPConnection('127.0.0.1', host.port, timeout=15)
try:
connection.request(method, f'/objects/{key}', body, headers)
response = connection.getresponse()
return response.status, response.getheader('ETag'), response.read()
finally:
connection.close()
def splice(offset, remove, insert):
return struct.pack('<II', offset, remove) + insert
def memory_kib(pid, field='VmRSS:'):
for line in Path(f'/proc/{pid}/status').read_text().splitlines():
if line.startswith(field):
return int(line.split()[1])
raise AssertionError(f'{field} unavailable')
def check(build):
fixed_binary = (build / 'pure-connections-fixed').resolve()
source_binary = (build / 'pure-connections').resolve()
editor = (build / 'pure-edit-fixed').resolve()
with tempfile.TemporaryDirectory(prefix='pure-fixed-http-') as directory:
root = Path(directory)
store = root / 'store'
fixed = Host(fixed_binary, store, True)
source = Host(source_binary, store, False)
fixed_idle_rss = memory_kib(fixed.process.pid)
source_idle_rss = memory_kib(source.process.pid)
try:
assert request(fixed, 'PUT', 'note', splice(0, 0, b'hello'), 0) == (
200, '"1"', b'hello')
assert request(source, 'GET', 'note') == (200, '"1"', b'hello')
assert request(source, 'PUT', 'note', splice(5, 0, b' Pure'), 1) == (
200, '"2"', b' Pure')
assert request(fixed, 'GET', 'note') == (200, '"2"', b'hello Pure')
stale_fixed = request(fixed, 'PUT', 'note', splice(0, 0, b'bad'), 1)
stale_source = request(source, 'PUT', 'note', splice(0, 0, b'bad'), 1)
assert stale_fixed == stale_source and stale_fixed[0] == 412
bad_fixed = request(fixed, 'PUT', 'note', splice(1000, 0, b'bad'), 2)
bad_source = request(source, 'PUT', 'note', splice(1000, 0, b'bad'), 2)
assert bad_fixed == bad_source and bad_fixed[0] != 200
assert request(fixed, 'GET', 'note') == (200, '"2"', b'hello Pure')
large = b'A' * 1_048_576
assert request(fixed, 'PUT', 'large', splice(0, 0, large), 0) == (
200, '"1"', large)
assert request(source, 'GET', 'large') == (200, '"1"', large)
shown = subprocess.run([str(editor), '--store', str(store), 'show', 'large'],
capture_output=True, timeout=15)
assert shown.returncode == 0 and shown.stdout == large
payload = root / 'one-byte'
payload.write_bytes(b'Z')
edited = subprocess.run([str(editor), '--store', str(store), 'edit',
'large', '1', '1048575', '1', str(payload)],
capture_output=True, timeout=15)
assert edited.returncode == 0, edited.stderr
assert request(fixed, 'GET', 'large') == (200, '"2"', large[:-1] + b'Z')
assert request(source, 'GET', 'large') == (200, '"2"', large[:-1] + b'Z')
fixed_after_large_rss = memory_kib(fixed.process.pid)
source_after_large_rss = memory_kib(source.process.pid)
fixed_peak_rss = memory_kib(fixed.process.pid, 'VmHWM:')
source_peak_rss = memory_kib(source.process.pid, 'VmHWM:')
assert fixed_peak_rss <= PEAK_RSS_LIMIT_KIB, (
fixed_peak_rss, PEAK_RSS_LIMIT_KIB)
finally:
fixed_stats = fixed.close()
source_stats = source.close()
limited = Host(fixed_binary, store, True, budget=1_048_576, timeout_ms=60000)
try:
with socket.create_connection(('127.0.0.1', limited.port), timeout=15) as sock:
sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 4096)
sock.sendall(b'GET /objects/large HTTP/1.1\r\nHost: localhost\r\n'
b'Content-Length: 0\r\n\r\n')
slow = http.client.HTTPResponse(sock)
slow.begin()
assert slow.status == 200 and slow.read(1) == b'A'
assert request(limited, 'GET', 'note')[0] == 503
assert slow.read() == b'A' * 1_048_574 + b'Z'
slow.close()
for _ in range(40):
if request(limited, 'GET', 'note') == (200, '"2"', b'hello Pure'):
break
time.sleep(0.05)
else:
raise AssertionError('borrowed output was not released after draining')
finally:
limited_stats = limited.close()
assert limited_stats['peak_retained_payload_bytes'] == 1_048_576
symbols = subprocess.run(['nm', '-g', str(fixed_binary)], capture_output=True,
text=True, check=True, timeout=15).stdout
assert 'pure_program_parse' not in symbols and 'pure_program_load' not in symbols
return {'profile': 'build-time-prepared-http-document-host',
'fixed_source_cli_same_document': 'pass',
'conditional_conflict_and_invalid_splice': 'pass',
'one_mib_roundtrip_and_native_edit': 'pass',
'slow_consumer_budget_and_release': 'pass',
'runtime_parser_symbols_absent': 'pass',
'fixed_stats': fixed_stats, 'source_stats': source_stats,
'limited_stats': limited_stats,
'fixed_idle_rss_kib': fixed_idle_rss,
'source_idle_rss_kib': source_idle_rss,
'fixed_after_large_rss_kib': fixed_after_large_rss,
'source_after_large_rss_kib': source_after_large_rss,
'fixed_peak_rss_kib': fixed_peak_rss,
'source_peak_rss_kib': source_peak_rss,
'fixed_peak_rss_limit_kib': PEAK_RSS_LIMIT_KIB,
'fixed_sha256': hashlib.sha256(fixed_binary.read_bytes()).hexdigest(),
'source_sha256': hashlib.sha256(source_binary.read_bytes()).hexdigest()}
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('--build', type=Path, default=HERE / 'build')
parser.add_argument('--output', type=Path)
args = parser.parse_args()
result = check(args.build)
body = json.dumps(result, indent=2) + '\n'
if args.output:
args.output.parent.mkdir(parents=True, exist_ok=True)
args.output.write_text(body)
print(body, end='')
if __name__ == '__main__':
main()
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