From 5ffa8aebec027a6fe338dfde0bd69ed678f60791 Mon Sep 17 00:00:00 2001
From: gurpreet319 <gurpreetsarngal@gmail.com>
Date: Fri, 18 Sep 2026 06:49:31 +0000
Subject: [PATCH] RDKEMW-25174 : Analytics events are not getting posted as
 expected with Nativescript wgt

Reason for change: Handle libcurl upload retries by implementing CURLOPT_SEEKFUNCTION
Test Procedure: build should be successful.
Risks: low
Priority: P2
---
 src/rtFileDownloader.cpp | 79 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/src/rtFileDownloader.cpp b/src/rtFileDownloader.cpp
index 824a911d4..c2a3dd4d5 100644
--- a/src/rtFileDownloader.cpp
+++ b/src/rtFileDownloader.cpp
@@ -149,6 +149,81 @@ static size_t ReadMemoryCallback(void *contents, size_t size, size_t nmemb, void
   return 0;
 }
 
+static int SeekMemoryCallback(
+    void *userp,
+    curl_off_t offset,
+    int origin)
+{
+    MemoryStruct *mem = (MemoryStruct *)userp;
+
+    size_t dataSize = mem->downloadRequest->readDataSize();
+    size_t newPos = 0;
+
+    switch (origin)
+    {
+        case SEEK_SET:
+            if (offset < 0)
+                return CURL_SEEKFUNC_CANTSEEK;
+
+            newPos = (size_t)offset;
+            break;
+
+        case SEEK_CUR:
+        {
+            long long pos =
+                (long long)mem->readSize +
+                (long long)offset;
+
+            if (pos < 0)
+                return CURL_SEEKFUNC_CANTSEEK;
+
+            newPos = (size_t)pos;
+            break;
+        }
+
+        case SEEK_END:
+        {
+            long long pos =
+                (long long)dataSize +
+                (long long)offset;
+
+            if (pos < 0)
+                return CURL_SEEKFUNC_CANTSEEK;
+
+            newPos = (size_t)pos;
+            break;
+        }
+
+        default:
+            return CURL_SEEKFUNC_CANTSEEK;
+    }
+
+    if (newPos > dataSize)
+    {
+        rtLogWarn(
+            "SeekMemoryCallback invalid seek: "
+            "origin=%d offset=%lld newPos=%zu dataSize=%zu",
+            origin,
+            (long long)offset,
+            newPos,
+            dataSize);
+
+        return CURL_SEEKFUNC_CANTSEEK;
+    }
+
+    rtLogWarn(
+        "SeekMemoryCallback: "
+        "origin=%d offset=%lld oldPos=%zu newPos=%zu dataSize=%zu",
+        origin,
+        (long long)offset,
+        mem->readSize,
+        newPos,
+        dataSize);
+
+    mem->readSize = newPos;
+
+    return CURL_SEEKFUNC_OK;
+}
 
 void startFileDownloadInBackground(void* data)
 {
@@ -1123,6 +1198,8 @@ bool rtFileDownloader::downloadByteRangeFromNetwork(rtFileDownloadRequest* downl
       chunk.downloadRequest = downloadRequest;
       curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, ReadMemoryCallback);
       curl_easy_setopt(curl_handle, CURLOPT_READDATA, (void *)&chunk);
+      curl_easy_setopt(curl_handle, CURLOPT_SEEKFUNCTION, SeekMemoryCallback);
+      curl_easy_setopt(curl_handle, CURLOPT_SEEKDATA, (void *)&chunk);
       curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDSIZE, readDataSize);
    }
 
@@ -1629,6 +1706,8 @@ bool rtFileDownloader::downloadFromNetwork(rtFileDownloadRequest* downloadReques
       chunk.downloadRequest = downloadRequest;
       curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, ReadMemoryCallback);
       curl_easy_setopt(curl_handle, CURLOPT_READDATA, (void *)&chunk);
+      curl_easy_setopt(curl_handle, CURLOPT_SEEKFUNCTION, SeekMemoryCallback);
+      curl_easy_setopt(curl_handle, CURLOPT_SEEKDATA, (void *)&chunk);
       curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDSIZE, readDataSize);
     }