--- a/src/os/win32/ngx_wsarecv.c
+++ b/src/os/win32/ngx_wsarecv.c
@@ -6,6 +6,149 @@
 
 ssize_t ngx_wsarecv(ngx_connection_t *c, char *buf, size_t size)
 {
+    int           rc;
+    u_int         flags;
+    size_t        bytes;
+    WSABUF        wsabuf[1];
+    ngx_err_t     err;
+    ngx_event_t  *rev;
+
+    wsabuf[0].buf = buf;
+    wsabuf[0].len = size;
+    flags = 0;
+    bytes = 0;
+
+    rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, NULL, NULL);
+
+    ngx_log_debug(c->log, "WSARecv: %d:%d" _ rc _ bytes);
+
+    rev = c->read;
+
+    if (rc == -1) {
+        rev->ready = 0;
+        err = ngx_socket_errno;
+
+        if (err == WSAEWOULDBLOCK) {
+            ngx_log_error(NGX_LOG_INFO, c->log, err, "WSARecv() EAGAIN");
+            return NGX_AGAIN;
+        }
+
+        rev->error = 1;
+        ngx_log_error(NGX_LOG_CRIT, c->log, err, "WSARecv() failed");
+        return NGX_ERROR;
+    }
+
+    if (bytes < size) {
+        rev->ready = 0;
+    }
+
+    if (bytes == 0) {
+        rev->eof = 1;
+    }
+
+    return bytes;
+}
+
+
+ssize_t ngx_overlapped_wsarecv(ngx_connection_t *c, char *buf, size_t size)
+{
+    int               rc;
+    u_int             flags;
+    size_t            bytes;
+    WSABUF            wsabuf[1];
+    ngx_err_t         err;
+    ngx_event_t      *rev;
+    LPWSAOVERLAPPED   ovlp;
+
+    rev = c->read;
+
+    if (!rev->ready) {
+        ngx_log_error(NGX_LOG_ALERT, rev->log, 0, "SECOND WSA POST");
+        return NGX_AGAIN;
+    }
+
+    ngx_log_debug(c->log, "rev->complete: %d" _ rev->complete);
+
+    if (rev->complete) {
+        rev->complete = 0;
+
+        if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
+            if (rev->ovlp.error) {
+                ngx_log_error(NGX_LOG_ERR, c->log, rev->ovlp.error,
+                              "WSARecv() failed");
+                return NGX_ERROR;
+            }
+
+            return rev->available;
+        }
+
+        if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp,
+                                   &bytes, 0, NULL) == 0) {
+            ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno,
+                         "WSARecv() or WSAGetOverlappedResult() failed");
+
+            return NGX_ERROR;
+        }
+
+        return bytes;
+    }
+
+    ovlp = (LPWSAOVERLAPPED) &rev->ovlp;
+    ngx_memzero(ovlp, sizeof(WSAOVERLAPPED));
+    wsabuf[0].buf = buf;
+    wsabuf[0].len = size;
+    flags = 0;
+    bytes = 0;
+
+    rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL);
+
+    rev->complete = 0;
+
+    ngx_log_debug(c->log, "WSARecv: %d:%d" _ rc _ bytes);
+
+    if (rc == -1) {
+        err = ngx_socket_errno;
+        if (err == WSA_IO_PENDING) {
+            rev->active = 1;
+            return NGX_AGAIN;
+        }
+
+        rev->error = 1;
+        ngx_log_error(NGX_LOG_CRIT, c->log, err, "WSARecv() failed");
+        return NGX_ERROR;
+    }
+
+    if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
+
+        /*
+         * if a socket was bound with I/O completion port
+         * then GetQueuedCompletionStatus() would anyway return its status
+         * despite that WSARecv() was already complete
+         */
+
+        rev->active = 1;
+        return NGX_AGAIN;
+    }
+
+    if (bytes == 0) {
+        rev->eof = 1;
+        rev->ready = 0;
+
+    } else {
+        rev->ready = 1;
+    }
+
+    rev->active = 0;
+
+    return bytes;
+}
+
+#if 0
+
+/* DELELTE IT WHEN ABOVE FUNC WOULD BE TESTED */
+
+ssize_t ngx_wsarecv(ngx_connection_t *c, char *buf, size_t size)
+{
     int               rc;
     u_int             flags;
     size_t            bytes;
@@ -88,3 +231,5 @@ ssize_t ngx_wsarecv(ngx_connection_t *c,
 
     return bytes;
 }
+
+#endif