1 files changed, 91 insertions, 0 deletions
diff --git a/ext/unicorn_http/global_variables.h b/ext/unicorn_http/global_variables.h
new file mode 100644
index 0000000..e593cf6
--- /dev/null
+++ b/ext/unicorn_http/global_variables.h
@@ -0,0 +1,91 @@
+#ifndef global_variables_h
+#define global_variables_h
+static VALUE mUnicorn;
+static VALUE cHttpParser;
+static VALUE eHttpParserError;
+
+static VALUE g_rack_url_scheme;
+static VALUE g_request_method;
+static VALUE g_request_uri;
+static VALUE g_fragment;
+static VALUE g_query_string;
+static VALUE g_http_version;
+static VALUE g_request_path;
+static VALUE g_path_info;
+static VALUE g_server_name;
+static VALUE g_server_port;
+static VALUE g_server_protocol;
+static VALUE g_http_host;
+static VALUE g_http_x_forwarded_proto;
+static VALUE g_http_transfer_encoding;
+static VALUE g_content_length;
+static VALUE g_http_trailer;
+static VALUE g_http_connection;
+static VALUE g_port_80;
+static VALUE g_port_443;
+static VALUE g_localhost;
+static VALUE g_http;
+static VALUE g_http_09;
+static VALUE g_http_10;
+static VALUE g_http_11;
+static VALUE g_GET;
+static VALUE g_HEAD;
+
+/** Defines common length and error messages for input length validation. */
+#define DEF_MAX_LENGTH(N, length) \
+  static const size_t MAX_##N##_LENGTH = length; \
+  static const char * const MAX_##N##_LENGTH_ERR = \
+    "HTTP element " # N  " is longer than the " # length " allowed length."
+
+/**
+ * Validates the max length of given input and throws an HttpParserError
+ * exception if over.
+ */
+#define VALIDATE_MAX_LENGTH(len, N) do { \
+  if (len > MAX_##N##_LENGTH) \
+    rb_raise(eHttpParserError, MAX_##N##_LENGTH_ERR); \
+} while (0)
+
+/** Defines global strings in the init method. */
+#define DEF_GLOBAL(N, val) do { \
+  g_##N = rb_obj_freeze(rb_str_new(val, sizeof(val) - 1)); \
+  rb_global_variable(&g_##N); \
+} while (0)
+
+/* Defines the maximum allowed lengths for various input elements.*/
+DEF_MAX_LENGTH(FIELD_NAME, 256);
+DEF_MAX_LENGTH(FIELD_VALUE, 80 * 1024);
+DEF_MAX_LENGTH(REQUEST_URI, 1024 * 12);
+DEF_MAX_LENGTH(FRAGMENT, 1024); /* Don't know if this length is specified somewhere or not */
+DEF_MAX_LENGTH(REQUEST_PATH, 1024);
+DEF_MAX_LENGTH(QUERY_STRING, (1024 * 10));
+DEF_MAX_LENGTH(HEADER, (1024 * (80 + 32)));
+
+void init_globals(void)
+{
+  DEF_GLOBAL(rack_url_scheme, "rack.url_scheme");
+  DEF_GLOBAL(request_method, "REQUEST_METHOD");
+  DEF_GLOBAL(request_uri, "REQUEST_URI");
+  DEF_GLOBAL(fragment, "FRAGMENT");
+  DEF_GLOBAL(query_string, "QUERY_STRING");
+  DEF_GLOBAL(http_version, "HTTP_VERSION");
+  DEF_GLOBAL(request_path, "REQUEST_PATH");
+  DEF_GLOBAL(path_info, "PATH_INFO");
+  DEF_GLOBAL(server_name, "SERVER_NAME");
+  DEF_GLOBAL(server_port, "SERVER_PORT");
+  DEF_GLOBAL(server_protocol, "SERVER_PROTOCOL");
+  DEF_GLOBAL(http_x_forwarded_proto, "HTTP_X_FORWARDED_PROTO");
+  DEF_GLOBAL(port_80, "80");
+  DEF_GLOBAL(port_443, "443");
+  DEF_GLOBAL(localhost, "localhost");
+  DEF_GLOBAL(http, "http");
+  DEF_GLOBAL(http_11, "HTTP/1.1");
+  DEF_GLOBAL(http_10, "HTTP/1.0");
+  DEF_GLOBAL(http_09, "HTTP/0.9");
+  DEF_GLOBAL(GET, "GET");
+  DEF_GLOBAL(HEAD, "HEAD");
+}
+
+#undef DEF_GLOBAL
+
+#endif /* global_variables_h */