onRequest method
Called when the request is about to be sent.
Implementation
@override
void onRequest(
RequestOptions options,
RequestInterceptorHandler handler,
) async {
try {
if (addCorrelationHeaders) {
final correlationHeaders =
await RequestTracker.getServerCorrelationHeaders();
final headers = correlationHeaders.map(
(key, value) => MapEntry(key, value.first),
);
options.headers.addAll(headers);
}
var url = options.uri.toString();
final tracker = await RequestTracker.create(url);
_activeTrackers[tracker.id] = tracker;
options.extra[_trackerId] = tracker.id;
} finally {
handler.next(options);
}
}