feat(network-details): Add request details capture

Author: 43jay

Sources/Sentry/SentryNetworkTracker.m

@@ -236,6 +236,14 @@ - (void)urlSessionTask:(NSURLSessionTask *)sessionTask setState:(NSURLSessionTas
         return;
     }
 
+    SentryOptions *options = SentrySDK.startOption;
+    NSString *urlString = sessionTask.currentRequest.URL.absoluteString;
+    if ([self isNetworkDetailCaptureEnabledFor:urlString options:options]) {
+        [self captureRequestDetails:sessionTask
+               networkCaptureBodies:options.sessionReplay.networkCaptureBodies
+              networkRequestHeaders:options.sessionReplay.networkRequestHeaders];
+    }
+
     if (![self isTaskSupported:sessionTask]) {
         return;
     }
@@ -562,6 +570,26 @@ - (SentryLevel)getBreadcrumbLevel:(NSURLSessionTask *)sessionTask
     return breadcrumbLevel;
 }
 
+// Store extracted network details data for session replay.
+static const void *SentryNetworkDetailsKey = &SentryNetworkDetailsKey;
+
+- (BOOL)isNetworkDetailCaptureEnabledFor:(NSString *)urlString options:(SentryOptions *)options
+{
+    if (!options) {
+        return NO;
+    }
+
+    if (!urlString) {
+        return NO;
+    }
+
+    if (!options.sessionReplay) {
+        return NO;
+    }
+
+    return [options.sessionReplay isNetworkDetailCaptureEnabledFor:urlString];
+}
+
 - (void)captureResponseDetails:(NSData *)data
                       response:(NSURLResponse *)response
                        request:(NSURLRequest *)request
@@ -573,4 +601,45 @@ - (void)captureResponseDetails:(NSData *)data
     // 4. Handle size limits and truncation if needed
 }
 
+- (void)captureRequestDetails:(NSURLSessionTask *)sessionTask
+         networkCaptureBodies:(BOOL)networkCaptureBodies
+        networkRequestHeaders:(NSArray<NSString *> *)networkRequestHeaders
+{
+    if (!sessionTask || !sessionTask.currentRequest) {
+        return;
+    }
+
+    SentryReplayNetworkDetails *existingDetails
+        = objc_getAssociatedObject(sessionTask, &SentryNetworkDetailsKey);
+    if (existingDetails) {
+        return;
+    }
+
+    NSURLRequest *request = sessionTask.currentRequest;
+
+    SentryReplayNetworkDetails *details =
+        [[SentryReplayNetworkDetails alloc] initWithMethod:request.HTTPMethod ?: @"GET"];
+
+    // Note: currentRequest.HTTPBody is often nil even when body exists, so we check originalRequest
+    NSData *bodyData
+        = networkCaptureBodies ? (request.HTTPBody ?: sessionTask.originalRequest.HTTPBody) : nil;
+
+    NSNumber *requestSize = nil;
+    // Set request size - prefer actual bytes sent, fallback to local body data length
+    if (sessionTask.countOfBytesSent > 0) {
+        requestSize = [NSNumber numberWithLongLong:sessionTask.countOfBytesSent];
+    } else if (bodyData) {
+        requestSize = [NSNumber numberWithUnsignedInteger:bodyData.length];
+    }
+
+    [details setRequestWithSize:requestSize
+                       bodyData:bodyData
+                    contentType:request.allHTTPHeaderFields[@"Content-Type"]
+                     allHeaders:request.allHTTPHeaderFields
+              configuredHeaders:networkRequestHeaders];
+
+    objc_setAssociatedObject(
+        sessionTask, &SentryNetworkDetailsKey, details, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
 @end

Sources/Swift/Integrations/SessionReplay/SentryReplayNetworkDetails.swift

@@ -187,36 +187,44 @@ enum NetworkBodyWarning: String {
 
     // MARK: - ObjC Setters
 
-    /// Sets request details from raw components.
+    /// Sets request details from raw body data.
+    ///
+    /// Parses the body data based on content type (JSON, form-urlencoded, text)
+    /// and applies size limits and truncation warnings automatically.
     ///
     /// - Parameters:
     ///   - size: Request body size in bytes, or nil if unknown.
-    ///   - body: Pre-parsed body content (dictionary, array, or string), or nil if not captured.
+    ///   - bodyData: Raw body bytes, or nil if body capture is disabled or unavailable.
+    ///   - contentType: MIME content type for body parsing (e.g. "application/json").
     ///   - allHeaders: All headers from the request (e.g. from `NSURLRequest.allHTTPHeaderFields`).
     ///   - configuredHeaders: Header names to extract, matched case-insensitively.
     @objc
-    public func setRequest(size: NSNumber?, body: Any?, allHeaders: [String: Any]?, configuredHeaders: [String]?) {
+    public func setRequest(size: NSNumber?, bodyData: Data?, contentType: String?, allHeaders: [String: Any]?, configuredHeaders: [String]?) {
         self.request = Detail(
             size: size,
-            body: body.map { Body(content: $0) },
+            body: bodyData.flatMap { Body(data: $0, contentType: contentType) },
             headers: SentryReplayNetworkDetails.extractHeaders(from: allHeaders, matching: configuredHeaders)
         )
     }
 
-    /// Sets response details from raw components.
+    /// Sets response details from raw body data.
+    ///
+    /// Parses the body data based on content type (JSON, form-urlencoded, text)
+    /// and applies size limits and truncation warnings automatically.
     ///
     /// - Parameters:
     ///   - statusCode: HTTP status code.
     ///   - size: Response body size in bytes, or nil if unknown.
-    ///   - body: Pre-parsed body content (dictionary, array, or string), or nil if not captured.
+    ///   - bodyData: Raw body bytes, or nil if body capture is disabled or unavailable.
+    ///   - contentType: MIME content type for body parsing (e.g. "application/json").
     ///   - allHeaders: All headers from the response (e.g. from `NSHTTPURLResponse.allHeaderFields`).
     ///   - configuredHeaders: Header names to extract, matched case-insensitively.
     @objc
-    public func setResponse(statusCode: Int, size: NSNumber?, body: Any?, allHeaders: [String: Any]?, configuredHeaders: [String]?) {
+    public func setResponse(statusCode: Int, size: NSNumber?, bodyData: Data?, contentType: String?, allHeaders: [String: Any]?, configuredHeaders: [String]?) {
         self.statusCode = NSNumber(value: statusCode)
         self.response = Detail(
             size: size,
-            body: body.map { Body(content: $0) },
+            body: bodyData.flatMap { Body(data: $0, contentType: contentType) },
             headers: SentryReplayNetworkDetails.extractHeaders(from: allHeaders, matching: configuredHeaders)
         )
     }

Tests/SentryTests/Networking/SentryReplayNetworkDetailsIntegrationTests.swift

@@ -20,20 +20,25 @@ class SentryReplayNetworkDetailsIntegrationTests: XCTestCase {
 
     // MARK: - Serialization Tests
 
-    func testSerialize_withFullData_shouldReturnCompleteDictionary() {
+    func testSerialize_withFullData_shouldReturnCompleteDictionary() throws {
         // -- Arrange --
         let details = SentryReplayNetworkDetails(method: "PUT")
 
+        let requestBodyData = try JSONSerialization.data(withJSONObject: ["name": "test"])
         details.setRequest(
             size: 100,
-            body: ["name": "test"],
+            bodyData: requestBodyData,
+            contentType: "application/json",
             allHeaders: ["Content-Type": "application/json", "Authorization": "Bearer token", "Accept": "*/*"],
             configuredHeaders: ["Content-Type", "Authorization"]
         )
+
+        let responseBodyData = try JSONSerialization.data(withJSONObject: ["id": 123, "name": "test"])
         details.setResponse(
             statusCode: 201,
             size: 150,
-            body: ["id": 123, "name": "test"],
+            bodyData: responseBodyData,
+            contentType: "application/json",
             allHeaders: ["Content-Type": "application/json", "Cache-Control": "no-cache", "Set-Cookie": "session=123"],
             configuredHeaders: ["Content-Type", "Cache-Control"]
         )
@@ -85,7 +90,8 @@ class SentryReplayNetworkDetailsIntegrationTests: XCTestCase {
         details.setResponse(
             statusCode: 404,
             size: nil,
-            body: nil,
+            bodyData: nil,
+            contentType: nil,
             allHeaders: ["Cache-Control": "no-cache", "Content-Type": "text/plain", "X-Custom": "value"],
             configuredHeaders: ["Cache-Control", "Content-Type"]
         )
@@ -115,7 +121,8 @@ class SentryReplayNetworkDetailsIntegrationTests: XCTestCase {
         let details = SentryReplayNetworkDetails(method: "GET")
         details.setRequest(
             size: nil,
-            body: nil,
+            bodyData: nil,
+            contentType: nil,
             allHeaders: [
                 "Content-Type": "application/json",
                 "Authorization": "Bearer secret",