elasticapm/instrumentation/packages/httpx/sync/httpcore.py

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from elasticapm.instrumentation.packages.base import AbstractInstrumentedModule
from elasticapm.instrumentation.packages.httpx import utils
from elasticapm.traces import DroppedSpan, capture_span, execution_context
from elasticapm.utils import default_ports
from elasticapm.utils.disttracing import TracingOptions


class HTTPCoreInstrumentation(AbstractInstrumentedModule):
    name = "httpcore"

    instrument_list = [
        ("httpcore._sync.connection", "SyncHTTPConnection.request"),  # < httpcore 0.13
        ("httpcore._sync.connection", "SyncHTTPConnection.handle_request"),  # >= httpcore 0.13
        ("httpcore._sync.connection", "HTTPConnection.handle_request"),  # httpcore >= 0.14 (hopefully...)
    ]

    def call(self, module, method, wrapped, instance, args, kwargs):
        url, method, headers = utils.get_request_data(args, kwargs)
        scheme, host, port, target = url
        if port != default_ports.get(scheme):
            host += ":" + str(port)

        signature = "%s %s" % (method.upper(), host)

        url = "%s://%s%s" % (scheme, host, target)

        transaction = execution_context.get_transaction()

        with capture_span(
            signature,
            span_type="external",
            span_subtype="http",
            extra={"http": {"url": url}},
            leaf=True,
        ) as span:
            # if httpcore has been called in a leaf span, this span might be a DroppedSpan.
            leaf_span = span
            while isinstance(leaf_span, DroppedSpan):
                leaf_span = leaf_span.parent

            if headers is not None:
                # It's possible that there are only dropped spans, e.g. if we started dropping spans.
                # In this case, the transaction.id is used
                parent_id = leaf_span.id if leaf_span else transaction.id
                trace_parent = transaction.trace_parent.copy_from(
                    span_id=parent_id, trace_options=TracingOptions(recorded=True)
                )
                utils.set_disttracing_headers(headers, trace_parent, transaction)
                if leaf_span:
                    leaf_span.dist_tracing_propagated = True
            response = wrapped(*args, **kwargs)
            status_code = utils.get_status(response)
            if status_code:
                if span.context:
                    span.context["http"]["status_code"] = status_code
                span.set_success() if status_code < 400 else span.set_failure()
            return response

    def mutate_unsampled_call_args(self, module, method, wrapped, instance, args, kwargs, transaction):
        # since we don't have a span, we set the span id to the transaction id
        trace_parent = transaction.trace_parent.copy_from(
            span_id=transaction.id, trace_options=TracingOptions(recorded=False)
        )
        headers = utils.get_request_data(args, kwargs)[2]
        utils.set_disttracing_headers(headers, trace_parent, transaction)
        return args, kwargs