- Fixed a potential data loss in Curl_client_write() when the transfer is

paused.

lib/sendf.c

@@ -425,7 +425,7 @@ static CURLcode pausewrite(struct SessionHandle *data,
 }
 
 
-/* client_write() sends data to the write callback(s)
+/* Curl_client_write() sends data to the write callback(s)
 
    The bit pattern defines to what "streams" to write to. Body and/or header.
    The defines are in sendf.h of course.
@@ -442,6 +442,9 @@ CURLcode Curl_client_write(struct connectdata *conn,
   struct SessionHandle *data = conn->data;
   size_t wrote;
 
+  if(0 == len)
+    len = strlen(ptr);
+
   /* If reading is actually paused, we're forced to append this chunk of data
      to the already held data, but only if it is the same type as otherwise it
      can't work and it'll return error instead. */
@@ -469,9 +472,6 @@ CURLcode Curl_client_write(struct connectdata *conn,
     return CURLE_OK;
   }
 
-  if(0 == len)
-    len = strlen(ptr);
-
   if(type & CLIENTWRITE_BODY) {
     if((conn->protocol&PROT_FTP) && conn->proto.ftpc.transfertype == 'A') {
 #ifdef CURL_DOES_CONVERSIONS