ext/unicorn_http/global_variables.h

   1 #ifndef global_variables_h
   2 #define global_variables_h
   3 static VALUE eHttpParserError;
   4
   5 static VALUE g_rack_url_scheme;
   6 static VALUE g_request_method;
   7 static VALUE g_request_uri;
   8 static VALUE g_fragment;
   9 static VALUE g_query_string;
  10 static VALUE g_http_version;
  11 static VALUE g_request_path;
  12 static VALUE g_path_info;
  13 static VALUE g_server_name;
  14 static VALUE g_server_port;
  15 static VALUE g_server_protocol;
  16 static VALUE g_http_host;
  17 static VALUE g_http_x_forwarded_proto;
  18 static VALUE g_http_x_forwarded_ssl;
  19 static VALUE g_http_transfer_encoding;
  20 static VALUE g_content_length;
  21 static VALUE g_http_trailer;
  22 static VALUE g_http_connection;
  23 static VALUE g_port_80;
  24 static VALUE g_port_443;
  25 static VALUE g_localhost;
  26 static VALUE g_http;
  27 static VALUE g_https;
  28 static VALUE g_http_09;
  29 static VALUE g_http_10;
  30 static VALUE g_http_11;
  31
  32 /** Defines common length and error messages for input length validation. */
  33 #define DEF_MAX_LENGTH(N, length) \
  34   static const size_t MAX_##N##_LENGTH = length; \
  35   static const char * const MAX_##N##_LENGTH_ERR = \
  36     "HTTP element " # N  " is longer than the " # length " allowed length."
  37
  38 NORETURN(static void parser_error(const char *));
  39
  40 /**
  41  * Validates the max length of given input and throws an HttpParserError
  42  * exception if over.
  43  */
  44 #define VALIDATE_MAX_LENGTH(len, N) do { \
  45   if (len > MAX_##N##_LENGTH) \
  46     parser_error(MAX_##N##_LENGTH_ERR); \
  47 } while (0)
  48
  49 /** Defines global strings in the init method. */
  50 #define DEF_GLOBAL(N, val) do { \
  51   g_##N = rb_obj_freeze(rb_str_new(val, sizeof(val) - 1)); \
  52   rb_global_variable(&g_##N); \
  53 } while (0)
  54
  55 /* Defines the maximum allowed lengths for various input elements.*/
  56 DEF_MAX_LENGTH(FIELD_NAME, 256);
  57 DEF_MAX_LENGTH(FIELD_VALUE, 80 * 1024);
  58 DEF_MAX_LENGTH(REQUEST_URI, 1024 * 12);
  59 DEF_MAX_LENGTH(FRAGMENT, 1024); /* Don't know if this length is specified somewhere or not */
  60 DEF_MAX_LENGTH(REQUEST_PATH, 1024);
  61 DEF_MAX_LENGTH(QUERY_STRING, (1024 * 10));
  62 DEF_MAX_LENGTH(HEADER, (1024 * (80 + 32)));
  63
  64 static void init_globals(void)
  65 {
  66   DEF_GLOBAL(rack_url_scheme, "rack.url_scheme");
  67   DEF_GLOBAL(request_method, "REQUEST_METHOD");
  68   DEF_GLOBAL(request_uri, "REQUEST_URI");
  69   DEF_GLOBAL(fragment, "FRAGMENT");
  70   DEF_GLOBAL(query_string, "QUERY_STRING");
  71   DEF_GLOBAL(http_version, "HTTP_VERSION");
  72   DEF_GLOBAL(request_path, "REQUEST_PATH");
  73   DEF_GLOBAL(path_info, "PATH_INFO");
  74   DEF_GLOBAL(server_name, "SERVER_NAME");
  75   DEF_GLOBAL(server_port, "SERVER_PORT");
  76   DEF_GLOBAL(server_protocol, "SERVER_PROTOCOL");
  77   DEF_GLOBAL(http_x_forwarded_proto, "HTTP_X_FORWARDED_PROTO");
  78   DEF_GLOBAL(http_x_forwarded_ssl, "HTTP_X_FORWARDED_SSL");
  79   DEF_GLOBAL(port_80, "80");
  80   DEF_GLOBAL(port_443, "443");
  81   DEF_GLOBAL(localhost, "localhost");
  82   DEF_GLOBAL(http, "http");
  83   DEF_GLOBAL(https, "https");
  84   DEF_GLOBAL(http_11, "HTTP/1.1");
  85   DEF_GLOBAL(http_10, "HTTP/1.0");
  86   DEF_GLOBAL(http_09, "HTTP/0.9");
  87 }
  88
  89 #undef DEF_GLOBAL
  90
  91 #endif /* global_variables_h */