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from types import SimpleNamespace
import attr
from multidict import CIMultiDict
from yarl import URL
from .client_reqrep import ClientResponse
from .signals import Signal
__all__ = (
'TraceConfig', 'TraceRequestStartParams', 'TraceRequestEndParams',
'TraceRequestExceptionParams', 'TraceConnectionQueuedStartParams',
'TraceConnectionQueuedEndParams', 'TraceConnectionCreateStartParams',
'TraceConnectionCreateEndParams', 'TraceConnectionReuseconnParams',
'TraceDnsResolveHostStartParams', 'TraceDnsResolveHostEndParams',
'TraceDnsCacheHitParams', 'TraceDnsCacheMissParams',
'TraceRequestRedirectParams'
)
class TraceConfig:
"""First-class used to trace requests launched via ClientSession
objects."""
def __init__(self, trace_config_ctx_factory=SimpleNamespace):
self._on_request_start = Signal(self)
self._on_request_end = Signal(self)
self._on_request_exception = Signal(self)
self._on_request_redirect = Signal(self)
self._on_connection_queued_start = Signal(self)
self._on_connection_queued_end = Signal(self)
self._on_connection_create_start = Signal(self)
self._on_connection_create_end = Signal(self)
self._on_connection_reuseconn = Signal(self)
self._on_dns_resolvehost_start = Signal(self)
self._on_dns_resolvehost_end = Signal(self)
self._on_dns_cache_hit = Signal(self)
self._on_dns_cache_miss = Signal(self)
self._trace_config_ctx_factory = trace_config_ctx_factory
def trace_config_ctx(self, trace_request_ctx=None):
""" Return a new trace_config_ctx instance """
return self._trace_config_ctx_factory(
trace_request_ctx=trace_request_ctx)
def freeze(self):
self._on_request_start.freeze()
self._on_request_end.freeze()
self._on_request_exception.freeze()
self._on_request_redirect.freeze()
self._on_connection_queued_start.freeze()
self._on_connection_queued_end.freeze()
self._on_connection_create_start.freeze()
self._on_connection_create_end.freeze()
self._on_connection_reuseconn.freeze()
self._on_dns_resolvehost_start.freeze()
self._on_dns_resolvehost_end.freeze()
self._on_dns_cache_hit.freeze()
self._on_dns_cache_miss.freeze()
@property
def on_request_start(self):
return self._on_request_start
@property
def on_request_end(self):
return self._on_request_end
@property
def on_request_exception(self):
return self._on_request_exception
@property
def on_request_redirect(self):
return self._on_request_redirect
@property
def on_connection_queued_start(self):
return self._on_connection_queued_start
@property
def on_connection_queued_end(self):
return self._on_connection_queued_end
@property
def on_connection_create_start(self):
return self._on_connection_create_start
@property
def on_connection_create_end(self):
return self._on_connection_create_end
@property
def on_connection_reuseconn(self):
return self._on_connection_reuseconn
@property
def on_dns_resolvehost_start(self):
return self._on_dns_resolvehost_start
@property
def on_dns_resolvehost_end(self):
return self._on_dns_resolvehost_end
@property
def on_dns_cache_hit(self):
return self._on_dns_cache_hit
@property
def on_dns_cache_miss(self):
return self._on_dns_cache_miss
@attr.s(frozen=True, slots=True)
class TraceRequestStartParams:
""" Parameters sent by the `on_request_start` signal"""
method = attr.ib(type=str)
url = attr.ib(type=URL)
headers = attr.ib(type=CIMultiDict)
@attr.s(frozen=True, slots=True)
class TraceRequestEndParams:
""" Parameters sent by the `on_request_end` signal"""
method = attr.ib(type=str)
url = attr.ib(type=URL)
headers = attr.ib(type=CIMultiDict)
response = attr.ib(type=ClientResponse)
@attr.s(frozen=True, slots=True)
class TraceRequestExceptionParams:
""" Parameters sent by the `on_request_exception` signal"""
method = attr.ib(type=str)
url = attr.ib(type=URL)
headers = attr.ib(type=CIMultiDict)
exception = attr.ib(type=Exception)
@attr.s(frozen=True, slots=True)
class TraceRequestRedirectParams:
""" Parameters sent by the `on_request_redirect` signal"""
method = attr.ib(type=str)
url = attr.ib(type=URL)
headers = attr.ib(type=CIMultiDict)
response = attr.ib(type=ClientResponse)
@attr.s(frozen=True, slots=True)
class TraceConnectionQueuedStartParams:
""" Parameters sent by the `on_connection_queued_start` signal"""
@attr.s(frozen=True, slots=True)
class TraceConnectionQueuedEndParams:
""" Parameters sent by the `on_connection_queued_end` signal"""
@attr.s(frozen=True, slots=True)
class TraceConnectionCreateStartParams:
""" Parameters sent by the `on_connection_create_start` signal"""
@attr.s(frozen=True, slots=True)
class TraceConnectionCreateEndParams:
""" Parameters sent by the `on_connection_create_end` signal"""
@attr.s(frozen=True, slots=True)
class TraceConnectionReuseconnParams:
""" Parameters sent by the `on_connection_reuseconn` signal"""
@attr.s(frozen=True, slots=True)
class TraceDnsResolveHostStartParams:
""" Parameters sent by the `on_dns_resolvehost_start` signal"""
host = attr.ib(type=str)
@attr.s(frozen=True, slots=True)
class TraceDnsResolveHostEndParams:
""" Parameters sent by the `on_dns_resolvehost_end` signal"""
host = attr.ib(type=str)
@attr.s(frozen=True, slots=True)
class TraceDnsCacheHitParams:
""" Parameters sent by the `on_dns_cache_hit` signal"""
host = attr.ib(type=str)
@attr.s(frozen=True, slots=True)
class TraceDnsCacheMissParams:
""" Parameters sent by the `on_dns_cache_miss` signal"""
host = attr.ib(type=str)
class Trace:
""" Internal class used to keep together the main dependencies used
at the moment of send a signal."""
def __init__(self, session, trace_config, trace_config_ctx):
self._trace_config = trace_config
self._trace_config_ctx = trace_config_ctx
self._session = session
async def send_request_start(self, method, url, headers):
return await self._trace_config.on_request_start.send(
self._session,
self._trace_config_ctx,
TraceRequestStartParams(method, url, headers)
)
async def send_request_end(self, method, url, headers, response):
return await self._trace_config.on_request_end.send(
self._session,
self._trace_config_ctx,
TraceRequestEndParams(method, url, headers, response)
)
async def send_request_exception(self, method, url, headers, exception):
return await self._trace_config.on_request_exception.send(
self._session,
self._trace_config_ctx,
TraceRequestExceptionParams(method, url, headers, exception)
)
async def send_request_redirect(self, method, url, headers, response):
return await self._trace_config._on_request_redirect.send(
self._session,
self._trace_config_ctx,
TraceRequestRedirectParams(method, url, headers, response)
)
async def send_connection_queued_start(self):
return await self._trace_config.on_connection_queued_start.send(
self._session,
self._trace_config_ctx,
TraceConnectionQueuedStartParams()
)
async def send_connection_queued_end(self):
return await self._trace_config.on_connection_queued_end.send(
self._session,
self._trace_config_ctx,
TraceConnectionQueuedEndParams()
)
async def send_connection_create_start(self):
return await self._trace_config.on_connection_create_start.send(
self._session,
self._trace_config_ctx,
TraceConnectionCreateStartParams()
)
async def send_connection_create_end(self):
return await self._trace_config.on_connection_create_end.send(
self._session,
self._trace_config_ctx,
TraceConnectionCreateEndParams()
)
async def send_connection_reuseconn(self):
return await self._trace_config.on_connection_reuseconn.send(
self._session,
self._trace_config_ctx,
TraceConnectionReuseconnParams()
)
async def send_dns_resolvehost_start(self, host):
return await self._trace_config.on_dns_resolvehost_start.send(
self._session,
self._trace_config_ctx,
TraceDnsResolveHostStartParams(host)
)
async def send_dns_resolvehost_end(self, host):
return await self._trace_config.on_dns_resolvehost_end.send(
self._session,
self._trace_config_ctx,
TraceDnsResolveHostEndParams(host)
)
async def send_dns_cache_hit(self, host):
return await self._trace_config.on_dns_cache_hit.send(
self._session,
self._trace_config_ctx,
TraceDnsCacheHitParams(host)
)
async def send_dns_cache_miss(self, host):
return await self._trace_config.on_dns_cache_miss.send(
self._session,
self._trace_config_ctx,
TraceDnsCacheMissParams(host)
)