ext/unicorn_http/global_variables.h

   1 #ifndef global_variables_h
   2 #define global_variables_h
   3 static VALUE eHttpParserError;
   4 static VALUE e413;
   5 static VALUE e414;
   6
   7 static VALUE g_rack_url_scheme;
   8 static VALUE g_request_method;
   9 static VALUE g_request_uri;
  10 static VALUE g_fragment;
  11 static VALUE g_query_string;
  12 static VALUE g_http_version;
  13 static VALUE g_request_path;
  14 static VALUE g_path_info;
  15 static VALUE g_server_name;
  16 static VALUE g_server_port;
  17 static VALUE g_server_protocol;
  18 static VALUE g_http_host;
  19 static VALUE g_http_x_forwarded_proto;
  20 static VALUE g_http_x_forwarded_ssl;
  21 static VALUE g_http_transfer_encoding;
  22 static VALUE g_content_length;
  23 static VALUE g_http_trailer;
  24 static VALUE g_http_connection;
  25 static VALUE g_port_80;
  26 static VALUE g_port_443;
  27 static VALUE g_localhost;
  28 static VALUE g_http;
  29 static VALUE g_https;
  30 static VALUE g_http_09;
  31 static VALUE g_http_10;
  32 static VALUE g_http_11;
  33
  34 /** Defines common length and error messages for input length validation. */
  35 #define DEF_MAX_LENGTH(N, length) \
  36   static const size_t MAX_##N##_LENGTH = length; \
  37   static const char * const MAX_##N##_LENGTH_ERR = \
  38     "HTTP element " # N  " is longer than the " # length " allowed length."
  39
  40 NORETURN(static void parser_raise(VALUE klass, const char *));
  41
  42 /**
  43  * Validates the max length of given input and throws an HttpParserError
  44  * exception if over.
  45  */
  46 #define VALIDATE_MAX_LENGTH(len, N) do { \
  47   if (len > MAX_##N##_LENGTH) \
  48     parser_raise(eHttpParserError, MAX_##N##_LENGTH_ERR); \
  49 } while (0)
  50
  51 #define VALIDATE_MAX_URI_LENGTH(len, N) do { \
  52   if (len > MAX_##N##_LENGTH) \
  53     parser_raise(e414, MAX_##N##_LENGTH_ERR); \
  54 } while (0)
  55
  56 /** Defines global strings in the init method. */
  57 #define DEF_GLOBAL(N, val) do { \
  58   g_##N = rb_obj_freeze(rb_str_new(val, sizeof(val) - 1)); \
  59   rb_global_variable(&g_##N); \
  60 } while (0)
  61
  62 /* Defines the maximum allowed lengths for various input elements.*/
  63 DEF_MAX_LENGTH(FIELD_NAME, 256);
  64 DEF_MAX_LENGTH(FIELD_VALUE, 80 * 1024);
  65 DEF_MAX_LENGTH(REQUEST_URI, 1024 * 12);
  66 DEF_MAX_LENGTH(FRAGMENT, 1024); /* Don't know if this length is specified somewhere or not */
  67 DEF_MAX_LENGTH(REQUEST_PATH, 1024);
  68 DEF_MAX_LENGTH(QUERY_STRING, (1024 * 10));
  69
  70 static void init_globals(void)
  71 {
  72   DEF_GLOBAL(rack_url_scheme, "rack.url_scheme");
  73   DEF_GLOBAL(request_method, "REQUEST_METHOD");
  74   DEF_GLOBAL(request_uri, "REQUEST_URI");
  75   DEF_GLOBAL(fragment, "FRAGMENT");
  76   DEF_GLOBAL(query_string, "QUERY_STRING");
  77   DEF_GLOBAL(http_version, "HTTP_VERSION");
  78   DEF_GLOBAL(request_path, "REQUEST_PATH");
  79   DEF_GLOBAL(path_info, "PATH_INFO");
  80   DEF_GLOBAL(server_name, "SERVER_NAME");
  81   DEF_GLOBAL(server_port, "SERVER_PORT");
  82   DEF_GLOBAL(server_protocol, "SERVER_PROTOCOL");
  83   DEF_GLOBAL(http_x_forwarded_proto, "HTTP_X_FORWARDED_PROTO");
  84   DEF_GLOBAL(http_x_forwarded_ssl, "HTTP_X_FORWARDED_SSL");
  85   DEF_GLOBAL(port_80, "80");
  86   DEF_GLOBAL(port_443, "443");
  87   DEF_GLOBAL(localhost, "localhost");
  88   DEF_GLOBAL(http, "http");
  89   DEF_GLOBAL(https, "https");
  90   DEF_GLOBAL(http_11, "HTTP/1.1");
  91   DEF_GLOBAL(http_10, "HTTP/1.0");
  92   DEF_GLOBAL(http_09, "HTTP/0.9");
  93 }
  94
  95 #undef DEF_GLOBAL
  96
  97 #endif /* global_variables_h */