module Mongrel

  # Every standard HTTP code mapped to the appropriate message.  These are
  # used so frequently that they are placed directly in Mongrel for easy
  # access rather than Mongrel::Const itself.
  HTTP_STATUS_CODES = {
    100  => 'Continue',
    101  => 'Switching Protocols',
    200  => 'OK',
    201  => 'Created',
    202  => 'Accepted',
    203  => 'Non-Authoritative Information',
    204  => 'No Content',
    205  => 'Reset Content',
    206  => 'Partial Content',
    300  => 'Multiple Choices',
    301  => 'Moved Permanently',
    302  => 'Moved Temporarily',
    303  => 'See Other',
    304  => 'Not Modified',
    305  => 'Use Proxy',
    400  => 'Bad Request',
    401  => 'Unauthorized',
    402  => 'Payment Required',
    403  => 'Forbidden',
    404  => 'Not Found',
    405  => 'Method Not Allowed',
    406  => 'Not Acceptable',
    407  => 'Proxy Authentication Required',
    408  => 'Request Time-out',
    409  => 'Conflict',
    410  => 'Gone',
    411  => 'Length Required',
    412  => 'Precondition Failed',
    413  => 'Request Entity Too Large',
    414  => 'Request-URI Too Large',
    415  => 'Unsupported Media Type',
    500  => 'Internal Server Error',
    501  => 'Not Implemented',
    502  => 'Bad Gateway',
    503  => 'Service Unavailable',
    504  => 'Gateway Time-out',
    505  => 'HTTP Version not supported'
  }

  # Frequently used constants when constructing requests or responses.  Many times
  # the constant just refers to a string with the same contents.  Using these constants
  # gave about a 3% to 10% performance improvement over using the strings directly.
  # Symbols did not really improve things much compared to constants.
  #
  # While Mongrel does try to emulate the CGI/1.2 protocol, it does not use the REMOTE_IDENT,
  # REMOTE_USER, or REMOTE_HOST parameters since those are either a security problem or
  # too taxing on performance.
  module Const
    DATE = "Date"

    # This is the part of the path after the SCRIPT_NAME.  URIClassifier will determine this.
    PATH_INFO="PATH_INFO"

    # This is the initial part that your handler is identified as by URIClassifier.
    SCRIPT_NAME="SCRIPT_NAME"

    # The original URI requested by the client.  Passed to URIClassifier to build PATH_INFO and SCRIPT_NAME.
    REQUEST_URI='REQUEST_URI'
    REQUEST_PATH='REQUEST_PATH'

    MONGREL_VERSION = VERSION = "1.3.0"

    MONGREL_TMP_BASE="mongrel"

    # The standard empty 404 response for bad requests.  Use Error4040Handler for custom stuff.
    ERROR_404_RESPONSE="HTTP/1.1 404 Not Found\r\nConnection: close\r\nServer: Mongrel #{MONGREL_VERSION}\r\n\r\nNOT FOUND"

    CONTENT_LENGTH="CONTENT_LENGTH"

    # A common header for indicating the server is too busy.  Not used yet.
    ERROR_503_RESPONSE="HTTP/1.1 503 Service Unavailable\r\n\r\nBUSY"

    # The basic max request size we'll try to read.
    CHUNK_SIZE=(16 * 1024)

    # This is the maximum header that is allowed before a client is booted.  The parser detects
    # this, but we'd also like to do this as well.
    MAX_HEADER=1024 * (80 + 32)

    # Maximum request body size before it is moved out of memory and into a tempfile for reading.
    MAX_BODY=MAX_HEADER

    # A frozen format for this is about 15% faster
    STATUS_FORMAT = "HTTP/1.1 %d %s\r\nConnection: close\r\n"

    CONTENT_TYPE = "Content-Type"

    LAST_MODIFIED = "Last-Modified"
    ETAG = "ETag"
    SLASH = "/"
    REQUEST_METHOD="REQUEST_METHOD"
    GET="GET"
    HEAD="HEAD"
    # ETag is based on the apache standard of hex mtime-size-inode (inode is 0 on win32)
    ETAG_FORMAT="\"%x-%x-%x\""
    LINE_END="\r\n"
    REMOTE_ADDR="REMOTE_ADDR"
    HTTP_X_FORWARDED_FOR="HTTP_X_FORWARDED_FOR"
    HTTP_IF_MODIFIED_SINCE="HTTP_IF_MODIFIED_SINCE"
    HTTP_IF_NONE_MATCH="HTTP_IF_NONE_MATCH"
    REDIRECT = "HTTP/1.1 302 Found\r\nLocation: %s\r\nConnection: close\r\n\r\n"
    HOST = "HOST"

    SERVER_NAME = "SERVER_NAME"
    SERVER_PORT = "SERVER_PORT"
    HTTP_HOST = "HTTP_HOST"
    PORT_80 = "80"

    SERVER_PROTOCOL = "SERVER_PROTOCOL"
    HTTP_11 = "HTTP/1.1"

    SERVER_SOFTWARE = "SERVER_SOFTWARE"
    GATEWAY_INTERFACE = "GATEWAY_INTERFACE"
    CGI_VER = "CGI/1.2"

    STOP_COMMAND = "!"

  end
end