1 files changed, 67 insertions, 0 deletions
diff --git a/examples/c/large-upload.c b/examples/c/large-upload.c
new file mode 100644
index 0000000..9d89298
--- /dev/null
+++ b/examples/c/large-upload.c
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/* examples/c/large-upload.c - Example of handling request payload larger
+ *			       larger than the shared memory
+ *
+ * Copyright (C) Andrew Clayton
+ * Copyright (C) F5, Inc.
+ */
+
+#define _XOPEN_SOURCE	500
+
+#define _FILE_OFFSET_BITS 64
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "unit/unit-wasm.h"
+
+static luw_ctx_t ctx;
+static u8 *request_buf;
+static unsigned long long total_bytes_wrote;
+static int fd;
+
+__luw_export_name("luw_module_end_handler")
+void luw_module_end_handler(void)
+{
+        free(request_buf);
+}
+
+__luw_export_name("luw_module_init_handler")
+void luw_module_init_handler(void)
+{
+        request_buf = malloc(luw_mem_get_init_size());
+}
+
+__luw_export_name("luw_response_end_handler")
+void luw_response_end_handler(void)
+{
+	close(fd);
+	total_bytes_wrote = 0;
+}
+
+__luw_export_name("luw_request_handler")
+int luw_request_handler(u8 *addr)
+{
+	ssize_t bytes_wrote;
+
+	if (total_bytes_wrote == 0) {
+		luw_init_ctx(&ctx, addr, 0);
+		luw_set_req_buf(&ctx, &request_buf, LUW_SRB_NONE);
+
+		fd = open("/var/tmp/large-file.dat", O_CREAT|O_TRUNC|O_WRONLY,
+			  0666);
+	}
+
+	bytes_wrote = luw_mem_splice_file(addr, fd);
+	if (bytes_wrote == -1)
+		return -1;
+
+	total_bytes_wrote += bytes_wrote;
+	if (total_bytes_wrote == luw_get_http_content_len(&ctx))
+		luw_http_response_end();
+
+	return 0;
+}