1 files changed, 80 insertions, 0 deletions

diff --git a/src/lib/response_from_callback.c b/src/lib/response_from_callback.c
new file mode 100644
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--- /dev/null
+++ b/src/lib/response_from_callback.c
@@ -0,0 +1,80 @@
+/*
+  This file is part of libmicrohttpd
+  Copyright (C) 2007-2018 Daniel Pittman and Christian Grothoff
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+/**
+ * @file lib/response_from_callback.c
+ * @brief implementation of MHD_response_from_callback()
+ * @author Christian Grothoff
+ */
+#include "internal.h"
+
+
+/**
+ * Create a response action.  The response object can be extended with
+ * header information and then be used any number of times.
+ *
+ * @param sc status code to return
+ * @param size size of the data portion of the response, #MHD_SIZE_UNKNOWN for unknown
+ * @param block_size preferred block size for querying crc (advisory only,
+ *                   MHD may still call @a crc using smaller chunks); this
+ *                   is essentially the buffer size used for IO, clients
+ *                   should pick a value that is appropriate for IO and
+ *                   memory performance requirements
+ * @param crc callback to use to obtain response data
+ * @param crc_cls extra argument to @a crc
+ * @param crfc callback to call to free @a crc_cls resources
+ * @return NULL on error (i.e. invalid arguments, out of memory)
+ * @ingroup response
+ */
+struct MHD_Response *
+MHD_response_from_callback (enum MHD_HTTP_StatusCode sc,
+                            uint64_t size,
+                            size_t block_size,
+                            MHD_ContentReaderCallback crc,
+                            void *crc_cls,
+                            MHD_ContentReaderFreeCallback crfc)
+{
+  struct MHD_Response *response;
+
+  mhd_assert (NULL != crc);
+  mhd_assert (0 != block_size);
+  if (NULL ==
+      (response = MHD_calloc_ (1,
+                               sizeof (struct MHD_Response) +
+                               block_size)))
+    return NULL;
+  response->fd = -1;
+  response->status_code = sc;
+  response->data = (void *) &response[1];
+  response->data_buffer_size = block_size;
+  if (! MHD_mutex_init_ (&response->mutex))
+  {
+    free (response);
+    return NULL;
+  }
+  response->crc = crc;
+  response->crfc = crfc;
+  response->crc_cls = crc_cls;
+  response->reference_count = 1;
+  response->total_size = size;
+  return response;
+}
+
+
+/* end of response_from_callback.c */