From 4f8d550c72658177b47111d2f64dfe94900b6df4 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 2 Jan 2013 19:07:17 +0100
Subject: [PATCH] add support for sending HTTP/1.1 100 Continue

---
 client.c | 8 ++++++++
 uhttpd.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/client.c b/client.c
index 3dc40e8..c5b82d2 100644
--- a/client.c
+++ b/client.c
@@ -141,6 +141,7 @@ static int client_parse_request(struct client *cl, char *data)
 	if (!type || !path || !version)
 		return CLIENT_STATE_DONE;
 
+	memset(&cl->request, 0, sizeof(cl->request));
 	req->url = path;
 	req->method = find_idx(http_methods, ARRAY_SIZE(http_methods), type);
 	if (req->method < 0)
@@ -191,6 +192,9 @@ static void client_header_complete(struct client *cl)
 	if (!rfc1918_filter_check(cl))
 		return;
 
+	if (cl->request.expect_cont)
+		ustream_printf(cl->us, "HTTP/1.1 100 Continue\r\n\r\n");
+
 	uh_handle_request(cl);
 }
 
@@ -216,6 +220,10 @@ static void client_parse_header(struct client *cl, char *data)
 		if (isupper(*name))
 			*name = tolower(*name);
 
+	if (!strcasecmp(data, "Expect") &&
+	    !strcasecmp(val, "100-continue"))
+		cl->request.expect_cont = true;
+
 	blobmsg_add_string(&cl->hdr, data, val);
 
 	cl->state = CLIENT_STATE_HEADER;
diff --git a/uhttpd.h b/uhttpd.h
index f47c743..4c09c12 100644
--- a/uhttpd.h
+++ b/uhttpd.h
@@ -78,6 +78,7 @@ enum http_version {
 struct http_request {
 	enum http_method method;
 	enum http_version version;
+	bool expect_cont;
 	int redirect_status;
 	const char *url;
 	const struct auth_realm *realm;
-- 
2.30.2