Add http fields to span.data

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## Unreleased
+
+### Enhancements
+
+- Add http fields to `span.data` ([#1497](https://github.com/getsentry/sentry-dart/pull/1497))
+  - Set `http.response.status_code`
+  - Set `http.response_content_length`
+
 ## 7.6.3
 
 ### Fixes

dart/lib/sentry.dart

@@ -42,3 +42,5 @@ export 'src/exception_stacktrace_extractor.dart';
 export 'src/utils/http_sanitizer.dart';
 // ignore: invalid_export_of_internal_element
 export 'src/utils/url_details.dart';
+// ignore: invalid_export_of_internal_element
+export 'src/utils/http_header_utils.dart';

dart/lib/src/http_client/tracing_client.dart

@@ -57,6 +57,8 @@ class TracingClient extends BaseClient {
       }
 
       response = await _client.send(request);
+      span?.setData('http.response.status_code', response.statusCode);
+      span?.setData('http.response_content_length', response.contentLength);
       span?.status = SpanStatus.fromHttpStatusCode(response.statusCode);
     } catch (exception) {
       span?.throwable = exception;

dart/lib/src/utils/http_header_utils.dart

@@ -0,0 +1,16 @@
+import 'package:meta/meta.dart';
+
+/// Helper to extract header data
+@internal
+class HttpHeaderUtils {
+  /// Get `Content-Length` header
+  static int? getContentLength(Map<String, List<String>> headers) {
+    final contentLengthHeader =
+        headers['content-length'] ?? headers['Content-Length'];
+    if (contentLengthHeader != null && contentLengthHeader.isNotEmpty) {
+      final headerValue = contentLengthHeader.first;
+      return int.tryParse(headerValue);
+    }
+    return null;
+  }
+}

dart/test/http_client/tracing_client_test.dart

@@ -42,6 +42,8 @@ void main() {
       expect(span.data['url'], 'https://example.com');
       expect(span.data['http.query'], 'foo=bar');
       expect(span.data['http.fragment'], 'baz');
+      expect(span.data['http.response.status_code'], 200);
+      expect(span.data['http.response_content_length'], 2);
     });
 
     test('finish span if errored request', () async {
@@ -225,7 +227,7 @@ class Fixture {
   MockClient getClient({int statusCode = 200, String? reason}) {
     return MockClient((request) async {
       expect(request.url, requestUri);
-      return Response('', statusCode, reasonPhrase: reason, request: request);
+      return Response('{}', statusCode, reasonPhrase: reason, request: request);
     });
   }
 }

dart/test/utils/http_header_utils_test.dart

@@ -0,0 +1,18 @@
+import 'package:sentry/sentry.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('get content length lower case', () {
+    final headers = {
+      'content-length': ['12']
+    };
+    expect(HttpHeaderUtils.getContentLength(headers), 12);
+  });
+
+  test('get content length camel case', () {
+    final headers = {
+      'Content-Length': ['12']
+    };
+    expect(HttpHeaderUtils.getContentLength(headers), 12);
+  });
+}

dio/lib/src/breadcrumb_client_adapter.dart

@@ -42,11 +42,8 @@ class BreadcrumbClientAdapter implements HttpClientAdapter {
 
       statusCode = response.statusCode;
       reason = response.statusMessage;
-      final contentLengthHeader = response.headers['content-length'];
-      if (contentLengthHeader != null && contentLengthHeader.isNotEmpty) {
-        final headerValue = contentLengthHeader.first;
-        responseBodySize = int.tryParse(headerValue);
-      }
+      // ignore: invalid_use_of_internal_member
+      responseBodySize = HttpHeaderUtils.getContentLength(response.headers);
 
       return response;
     } catch (_) {

dio/lib/src/tracing_client_adapter.dart

@@ -66,6 +66,13 @@ class TracingClientAdapter implements HttpClientAdapter {
 
       response = await _client.fetch(options, requestStream, cancelFuture);
       span?.status = SpanStatus.fromHttpStatusCode(response.statusCode);
+      span?.setData('http.response.status_code', response.statusCode);
+      final contentLengthHeader =
+          // ignore: invalid_use_of_internal_member
+          HttpHeaderUtils.getContentLength(response.headers);
+      if (contentLengthHeader != null) {
+        span?.setData('http.response_content_length', contentLengthHeader);
+      }
     } catch (exception) {
       span?.throwable = exception;
       span?.status = const SpanStatus.internalError();

dio/test/tracing_client_adapter_test.dart

@@ -24,7 +24,8 @@ void main() {
 
     test('captured span if successful request', () async {
       final sut = fixture.getSut(
-        client: fixture.getClient(statusCode: 200, reason: 'OK'),
+        client:
+            fixture.getClient(statusCode: 200, reason: 'OK', contentLength: 2),
       );
       final tr = fixture._hub.startTransaction(
         'name',
@@ -46,6 +47,8 @@ void main() {
       expect(span.data['url'], 'https://example.com');
       expect(span.data['http.query'], 'foo=bar');
       expect(span.data['http.fragment'], 'baz');
+      expect(span.data['http.response.status_code'], 200);
+      expect(span.data['http.response_content_length'], 2);
     });
 
     test('finish span if errored request', () async {
@@ -175,16 +178,27 @@ class Fixture {
     return dio;
   }
 
-  MockHttpClientAdapter getClient({int statusCode = 200, String? reason}) {
+  MockHttpClientAdapter getClient({
+    int statusCode = 200,
+    String? reason,
+    int? contentLength,
+  }) {
     return MockHttpClientAdapter((options, requestStream, cancelFuture) async {
       expect(options.uri, requestUri);
+
+      final headers = options.headers.map(
+        (key, dynamic value) =>
+            MapEntry(key, <String>[value?.toString() ?? '']),
+      );
+
+      if (contentLength != null) {
+        headers['Content-Length'] = [contentLength.toString()];
+      }
+
       return ResponseBody.fromString(
-        '',
+        '{}',
         statusCode,
-        headers: options.headers.map(
-          (key, dynamic value) =>
-              MapEntry(key, <String>[value?.toString() ?? '']),
-        ),
+        headers: headers,
       );
     });
   }