fix: formData upload broken in debug builds

Author: riteshshukla04

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/network/NetworkEventUtil.kt

@@ -19,6 +19,7 @@ import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags
 import java.io.IOException
 import java.net.SocketTimeoutException
 import okhttp3.Headers
+import okhttp3.MultipartBody
 import okhttp3.RequestBody
 import okio.Buffer
 
@@ -263,6 +264,13 @@ internal object NetworkEventUtil {
       return "[Preview unavailable]"
     }
 
+    // MultipartBody does not propagate isOneShot() from its parts, so check each
+    // part explicitly. Reading a one-shot part here would drain the underlying
+    // stream and cause the real request to fail.
+    if (body is MultipartBody && body.parts().any { it.body().isOneShot() }) {
+      return "[Preview unavailable]"
+    }
+
     return try {
       val buffer = Buffer()
       body.writeTo(buffer)

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/network/RequestBodyUtil.kt

@@ -146,6 +146,8 @@ internal object RequestBodyUtil {
         }
       }
 
+      override fun isOneShot(): Boolean = true
+
       @Throws(IOException::class)
       override fun writeTo(sink: BufferedSink) {
         var source: Source? = null