diff --git a/cocos/network/CCDownloader.cpp b/cocos/network/CCDownloader.cpp
index e47894c375..cb693aefbd 100644
--- a/cocos/network/CCDownloader.cpp
+++ b/cocos/network/CCDownloader.cpp
@@ -197,18 +197,18 @@ void Downloader::downloadToBuffer(const std::string& srcUrl, const std::string&
 
     CC_ASSERT(_downloaderImpl && "Cannot instanciate more than one instance of DownloaderImpl");
 
-    DownloadUnit unit;
-    unit.srcUrl = srcUrl;
-    unit.customId = customId;
-    unit.fp = buffer;
-    unit.downloaded = 0;
-    unit.totalToDownload = 0;
-
     StreamData streamBuffer;
     streamBuffer.buffer = buffer;
     streamBuffer.total = size;
     streamBuffer.offset = 0;
 
+    DownloadUnit unit;
+    unit.srcUrl = srcUrl;
+    unit.customId = customId;
+    unit.fp = &streamBuffer;
+    unit.downloaded = 0;
+    unit.totalToDownload = 0;
+
     int res = _downloaderImpl->performDownload(&unit,
                                                std::bind(&Downloader::bufferWriteFunc, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4),
                                                std::bind(&Downloader::downloadProgressFunc, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3)
diff --git a/cocos/network/CCDownloaderImpl.cpp b/cocos/network/CCDownloaderImpl.cpp
index 2616253d99..dad831d186 100644
--- a/cocos/network/CCDownloaderImpl.cpp
+++ b/cocos/network/CCDownloaderImpl.cpp
@@ -48,7 +48,10 @@ static size_t _fileWriteFunc(void *ptr, size_t size, size_t nmemb, void* userdat
     int ret = this_->getWriterCallback()(ptr, size, nmemb, unit);
     return ret;
 }
-
+static size_t _fileWriteFuncForAdapter(void *ptr, size_t size, size_t nmemb, void* userdata)
+{
+    return nmemb;
+}
 static int _downloadProgressFunc(void* userdata, double totalToDownload, double nowDownloaded, double totalToUpLoad, double nowUpLoaded)
 {
     DownloadUnit *downloadUnit = (DownloadUnit*)userdata;
@@ -284,7 +287,8 @@ int DownloaderImpl::getHeader(const std::string& url, HeaderInfo* headerInfo)
     curl_easy_setopt(curlHandle, CURLOPT_HEADER, 1);
     curl_easy_setopt(curlHandle, CURLOPT_NOBODY, 1);
     curl_easy_setopt(curlHandle, CURLOPT_NOSIGNAL, 1);
-
+    // in win32 platform, if not set the writeFunction, it will return CURLE_WRITE_ERROR
+    curl_easy_setopt(curlHandle, CURLOPT_WRITEFUNCTION, _fileWriteFuncForAdapter);
     if ((_lastErrCode=curl_easy_perform(curlHandle)) == CURLE_OK)
     {
         char *effectiveUrl;