add minimal example for empty body

src/examples/Makefile.am

@@ -20,6 +20,7 @@ noinst_PROGRAMS = \
  benchmark_https \
  chunked_example \
  minimal_example \
+ minimal_example_empty \
  dual_stack_example \
  minimal_example_comet \
  querystring_example \
@@ -83,6 +84,11 @@ minimal_example_SOURCES = \
 minimal_example_LDADD = \
  $(top_builddir)/src/microhttpd/libmicrohttpd.la
 
+minimal_example_empty_SOURCES = \
+ minimal_example_empty.c
+minimal_example_empty_LDADD = \
+ $(top_builddir)/src/microhttpd/libmicrohttpd.la
+
 upgrade_example_SOURCES = \
  upgrade_example.c
 upgrade_example_CFLAGS = \
@@ -216,4 +222,4 @@ http_chunked_compression_LDADD = \
 if HAVE_ZLIB
  http_compression_LDADD += -lz
  http_chunked_compression_LDADD += -lz
-endif
+endif

src/examples/minimal_example_empty.c

@@ -0,0 +1,94 @@
+/*
+     This file is part of libmicrohttpd
+     Copyright (C) 2007 Christian Grothoff (and other contributing authors)
+
+     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 minimal_example.c
+ * @brief minimal example for how to use libmicrohttpd
+ * @author Christian Grothoff
+ */
+
+#include "platform.h"
+#include <microhttpd.h>
+
+
+static int
+ahc_echo (void *cls,
+          struct MHD_Connection *connection,
+          const char *url,
+          const char *method,
+          const char *version,
+          const char *upload_data,
+          size_t *upload_data_size,
+          void **ptr)
+{
+  static int aptr;
+  struct MHD_Response *response;
+  int ret;
+
+  (void) url;               /* Unused. Silent compiler warning. */
+  (void) version;           /* Unused. Silent compiler warning. */
+  (void) upload_data;       /* Unused. Silent compiler warning. */
+  (void) upload_data_size;  /* Unused. Silent compiler warning. */
+
+  if (0 != strcmp (method, "GET"))
+    return MHD_NO;              /* unexpected method */
+  if (&aptr != *ptr)
+  {
+    /* do never respond on first call */
+    *ptr = &aptr;
+    return MHD_YES;
+  }
+  *ptr = NULL;                  /* reset when done */
+  response = MHD_create_response_from_buffer (0,
+                                              NULL,
+                                              MHD_RESPMEM_PERSISTENT);
+  ret = MHD_queue_response (connection,
+                            MHD_HTTP_NO_CONTENT,
+                            response);
+  MHD_destroy_response (response);
+  return ret;
+}
+
+
+int
+main (int argc,
+      char *const *argv)
+{
+  struct MHD_Daemon *d;
+
+  if (argc != 2)
+  {
+    printf ("%s PORT\n", argv[0]);
+    return 1;
+  }
+  d = MHD_start_daemon (/* MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG, */
+    MHD_USE_AUTO | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG,
+    /* MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG | MHD_USE_POLL, */
+    /* MHD_USE_THREAD_PER_CONNECTION | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG | MHD_USE_POLL, */
+    /* MHD_USE_THREAD_PER_CONNECTION | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG, */
+    atoi (argv[1]),
+    NULL, NULL, &ahc_echo, NULL,
+    MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 120,
+    MHD_OPTION_STRICT_FOR_CLIENT, (int) 1,
+    MHD_OPTION_END);
+  if (d == NULL)
+    return 1;
+  (void) getc (stdin);
+  MHD_stop_daemon (d);
+  return 0;
+}