[libmicrohttpd] 11/14: Added new API function MHD_create_response_from_buffer_copy()

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karlson2k pushed a commit to branch master
in repository libmicrohttpd.

commit 43cca25d4484ce137c95410be28e4cdf83a3a3b0
Author: Evgeny Grin (Karlson2k) <k2k@narod.ru>
AuthorDate: Tue Apr 19 18:51:11 2022 +0300

    Added new API function MHD_create_response_from_buffer_copy()
---
 src/include/microhttpd.h  |  29 +++++++++++-
 src/microhttpd/response.c | 113 ++++++++++++++++++++++++++++------------------
 2 files changed, 98 insertions(+), 44 deletions(-)

diff --git a/src/include/microhttpd.h b/src/include/microhttpd.h
index 8178584c..bd928ace 100644
--- a/src/include/microhttpd.h
+++ b/src/include/microhttpd.h
@@ -96,7 +96,7 @@ extern "C"
  * they are parsed as decimal numbers.
  * Example: 0x01093001 = 1.9.30-1.
  */
-#define MHD_VERSION 0x00097506
+#define MHD_VERSION 0x00097507
 
 /* If generic headers don't work on your platform, include headers
    which define 'va_list', 'size_t', 'ssize_t', 'intptr_t',
@@ -3564,6 +3564,33 @@ MHD_create_response_from_buffer_static (size_t size,
                                         const void *buffer);
 
 
+/**
+ * Create a response object with the content of provided statically allocated
+ * buffer used as the response body.
+ *
+ * An internal copy of the buffer will be made automatically, so buffer have
+ * to be valid only during the call of this function (as a typical example:
+ * buffer is a local (non-static) array).
+ *
+ * The response object can be extended with header information and then
+ * be used any number of times.
+ *
+ * If response object is used to answer HEAD request then the body
+ * of the response is not used, while all headers (including automatic
+ * headers) are used.
+ *
+ * @param size the size of the data in @a buffer, can be zero
+ * @param buffer the buffer with the data for the response body, can be NULL
+ *               if @a size is zero
+ * @return NULL on error (i.e. invalid arguments, out of memory)
+ * @note Available since #MHD_VERSION 0x00097507
+ * @ingroup response
+ */
+_MHD_EXTERN struct MHD_Response *
+MHD_create_response_from_buffer_copy (size_t size,
+                                      const void *buffer);
+
+
 /**
  * Create a response object with the content of provided buffer used as
  * the response body.
diff --git a/src/microhttpd/response.c b/src/microhttpd/response.c
index 8ddde763..47e28046 100644
--- a/src/microhttpd/response.c
+++ b/src/microhttpd/response.c
@@ -1331,50 +1331,19 @@ MHD_create_response_from_buffer (size_t size,
                                  void *buffer,
                                  enum MHD_ResponseMemoryMode mode)
 {
-  struct MHD_Response *r;
-  void *mhd_copy;
-  MHD_ContentReaderFreeCallback crfc;
-  void *crfc_cls;
-
-  if ((MHD_RESPMEM_MUST_COPY == mode) && (size > 0))
-  {
-    if (NULL == buffer)
-      return NULL;
-    mhd_copy = malloc (size);
-    if (NULL == mhd_copy)
-      return NULL;
-    crfc = &free;
-    crfc_cls = mhd_copy;
-    memcpy (mhd_copy, buffer, size);
-    buffer = mhd_copy;
-  }
-  else if (MHD_RESPMEM_MUST_FREE == mode)
-  {
-    mhd_copy = NULL;
-    crfc = &free;
-    crfc_cls = buffer;
-  }
-  else
-  {
-    mhd_copy = NULL;
-    crfc = NULL;
-    crfc_cls = NULL;
-  }
-
-  r = MHD_create_response_from_buffer_with_free_callback_cls (size,
-                                                              buffer,
-                                                              crfc,
-                                                              crfc_cls);
-  if (NULL == r)
-  {
-    if (NULL != mhd_copy)
-      free (mhd_copy);
-    return NULL;
-  }
-  /* TODO: remove the next check, the buffer should not be modifiable */
+  if (MHD_RESPMEM_MUST_FREE == mode)
+    return MHD_create_response_from_buffer_with_free_callback_cls (size,
+                                                                   buffer,
+                                                                   &free,
+                                                                   buffer);
   if (MHD_RESPMEM_MUST_COPY == mode)
-    r->data_buffer_size = size;
-  return r;
+    return MHD_create_response_from_buffer_copy (size,
+                                                 buffer);
+
+  return MHD_create_response_from_buffer_with_free_callback_cls (size,
+                                                                 buffer,
+                                                                 NULL,
+                                                                 NULL);
 }
 
 
@@ -1410,6 +1379,64 @@ MHD_create_response_from_buffer_static (size_t size,
 }
 
 
+/**
+ * Create a response object with the content of provided statically allocated
+ * buffer used as the response body.
+ *
+ * An internal copy of the buffer will be made automatically, so buffer have
+ * to be valid only during the call of this function (as a typical example:
+ * buffer is a local (non-static) array).
+ *
+ * The response object can be extended with header information and then
+ * be used any number of times.
+ *
+ * If response object is used to answer HEAD request then the body
+ * of the response is not used, while all headers (including automatic
+ * headers) are used.
+ *
+ * @param size the size of the data in @a buffer, can be zero
+ * @param buffer the buffer with the data for the response body, can be NULL
+ *               if @a size is zero
+ * @return NULL on error (i.e. invalid arguments, out of memory)
+ * @note Available since #MHD_VERSION 0x00097507
+ * @ingroup response
+ */
+_MHD_EXTERN struct MHD_Response *
+MHD_create_response_from_buffer_copy (size_t size,
+                                      const void *buffer)
+{
+  struct MHD_Response *r;
+  void *mhd_copy;
+
+  if (0 == size)
+    return MHD_create_response_from_buffer_with_free_callback_cls (0,
+                                                                   NULL,
+                                                                   NULL,
+                                                                   NULL);
+  if (NULL == buffer)
+    return NULL;
+
+  mhd_copy = malloc (size);
+  if (NULL == mhd_copy)
+    return NULL;
+  memcpy (mhd_copy, buffer, size);
+
+  r = MHD_create_response_from_buffer_with_free_callback_cls (size,
+                                                              mhd_copy,
+                                                              &free,
+                                                              mhd_copy);
+  if (NULL == r)
+    free (mhd_copy);
+  else
+  {
+    /* TODO: remove the next assignment, the buffer should not be modifiable */
+    r->data_buffer_size = size;
+  }
+
+  return r;
+}
+
+
 /**
  * Create a response object with the content of provided buffer used as
  * the response body.

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