mime: fix the content reader to handle >16K data properly

Reported-by: Jeroen Ooms
Closes #1988

1 files changed, 1 insertions, 2 deletions

diff --git a/lib/mime.c b/lib/mime.c
index 1868336ca..c337a35c9 100644
--- a/lib/mime.c
+++ b/lib/mime.c
@@ -620,14 +620,13 @@ static size_t mime_mem_read(char *buffer, size_t size, size_t nitems,
 {
   curl_mimepart *part = (curl_mimepart *) instream;
   size_t sz = (size_t) part->datasize - part->state.offset;
-
   (void) size;   /* Always 1.*/
 
   if(sz > nitems)
     sz = nitems;
 
   if(sz)
-    memcpy(buffer, (char *) part->data, sz);
+    memcpy(buffer, (char *) &part->data[part->state.offset], sz);
 
   part->state.offset += sz;
   return sz;