X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=parse.cpp;fp=parse.cpp;h=fca90a6d29b3397a42ad58a1babc25377e3eb8cd;hp=0747afb9e495334e41fec2bd639695b7bb172a29;hb=c2c9f6441f9ae8091a39aea0340417d5915e1ac9;hpb=e8740ea38fa1b54672a83744549fcd1463403d98

diff --git a/parse.cpp b/parse.cpp
index 0747afb..fca90a6 100644
--- a/parse.cpp
+++ b/parse.cpp
@@ -141,3 +141,30 @@ int fetch_config_int(const vector<ConfigLine> &config, const string &keyword, in
 	}
 	return value;
 }
+
+#define MAX_REQUEST_SIZE 16384  /* 16 kB. */
+
+RequestParseStatus wait_for_double_newline(string *existing_data, const char *new_data, size_t new_data_size)
+{
+	// Guard against overlong requests gobbling up all of our space.
+	if (existing_data->size() + new_data_size > MAX_REQUEST_SIZE) {
+		return RP_OUT_OF_SPACE;
+	}	
+
+	// See if we have \r\n\r\n anywhere in the request. We start three bytes
+	// before what we just appended, in case we just got the final character.
+	size_t existing_data_bytes = existing_data->size();
+	existing_data->append(string(new_data, new_data + new_data_size));
+	
+	const size_t start_at = (existing_data_bytes >= 3 ? existing_data_bytes - 3 : 0);
+	const char *ptr = reinterpret_cast<char *>(
+		memmem(existing_data->data() + start_at, existing_data->size() - start_at,
+		       "\r\n\r\n", 4));
+	if (ptr == NULL) {
+		return RP_NOT_FINISHED_YET;
+	}
+	if (ptr != existing_data->data() + existing_data->size() - 4) {
+		return RP_EXTRA_DATA;
+	}
+	return RP_FINISHED;
+}