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"""
Cross-process log tracing: HTTP server.
"""
import sys
from flask import Flask, request
from eliot import to_file, Action, start_action, add_global_fields
add_global_fields(process="server")
to_file(sys.stdout)
app = Flask("server")
def divide(x, y):
with start_action(action_type="divide", x=x, y=y) as action:
result = x / y
action.add_success_fields(result=result)
return result
@app.route("/")
def main():
with Action.continue_task(task_id=request.headers["x-eliot-task-id"]):
x = int(request.args["x"])
y = int(request.args["y"])
return str(divide(x, y))
if __name__ == '__main__':
app.run()
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