Function cancel

packages/cloudflare/src/request.ts:164–169

()

                  endSpanOnce();
                },
                cancel() {
                  // Client disconnected (or downstream cancelled). The `cancel`
                  // is being called while the response is still considered
                  // active, so this is a safe place to end the span.
                  endSpanOnce();
                },
              });

              return new Response(res.body.pipeThrough(transform), {