Module Puma::Const
In: lib/puma/const.rb

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.

The constants are frozen because Hash#[]= when called with a String key dups the String UNLESS the String is frozen. This saves us therefore 2 object allocations when creating the env hash later.

While Puma 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.

Constants

PUMA_VERSION = VERSION = "2.4.0".freeze
CODE_NAME = "Crunchy Munchy Lunchy"
FAST_TRACK_KA_TIMEOUT = 0.2
PERSISTENT_TIMEOUT = 20   The default number of seconds for another request within a persistent session.
FIRST_DATA_TIMEOUT = 30   The default number of seconds to wait until we get the first data for the request
DATE = "Date".freeze
SCRIPT_NAME = "SCRIPT_NAME".freeze
REQUEST_URI = 'REQUEST_URI'.freeze   The original URI requested by the client.
REQUEST_PATH = 'REQUEST_PATH'.freeze
PATH_INFO = 'PATH_INFO'.freeze
PUMA_TMP_BASE = "puma".freeze
ERROR_400_RESPONSE = "HTTP/1.1 400 Bad Request\r\n\r\n"   Indicate that we couldn‘t parse the request
ERROR_404_RESPONSE = "HTTP/1.1 404 Not Found\r\nConnection: close\r\nServer: Puma #{PUMA_VERSION}\r\n\r\nNOT FOUND".freeze   The standard empty 404 response for bad requests. Use Error4040Handler for custom stuff.
CONTENT_LENGTH = "CONTENT_LENGTH".freeze
ERROR_500_RESPONSE = "HTTP/1.1 500 Internal Server Error\r\n\r\n"   Indicate that there was an internal error, obviously.
ERROR_503_RESPONSE = "HTTP/1.1 503 Service Unavailable\r\n\r\nBUSY".freeze   A common header for indicating the server is too busy. Not used yet.
CHUNK_SIZE = 16 * 1024   The basic max request size we‘ll try to read.
MAX_HEADER = 1024 * (80 + 32)   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_BODY = MAX_HEADER   Maximum request body size before it is moved out of memory and into a tempfile for reading.
STATUS_FORMAT = "HTTP/1.1 %d %s\r\nConnection: close\r\n".freeze   A frozen format for this is about 15% faster
CONTENT_TYPE = "Content-Type".freeze
LAST_MODIFIED = "Last-Modified".freeze
ETAG = "ETag".freeze
SLASH = "/".freeze
REQUEST_METHOD = "REQUEST_METHOD".freeze
GET = "GET".freeze
HEAD = "HEAD".freeze
ETAG_FORMAT = "\"%x-%x-%x\"".freeze   ETag is based on the apache standard of hex mtime-size-inode (inode is 0 on win32)
LINE_END = "\r\n".freeze
REMOTE_ADDR = "REMOTE_ADDR".freeze
HTTP_X_FORWARDED_FOR = "HTTP_X_FORWARDED_FOR".freeze
HTTP_IF_MODIFIED_SINCE = "HTTP_IF_MODIFIED_SINCE".freeze
HTTP_IF_NONE_MATCH = "HTTP_IF_NONE_MATCH".freeze
REDIRECT = "HTTP/1.1 302 Found\r\nLocation: %s\r\nConnection: close\r\n\r\n".freeze
HOST = "HOST".freeze
SERVER_NAME = "SERVER_NAME".freeze
SERVER_PORT = "SERVER_PORT".freeze
HTTP_HOST = "HTTP_HOST".freeze
PORT_80 = "80".freeze
PORT_443 = "443".freeze
LOCALHOST = "localhost".freeze
SERVER_PROTOCOL = "SERVER_PROTOCOL".freeze
HTTP_11 = "HTTP/1.1".freeze
HTTP_10 = "HTTP/1.0".freeze
SERVER_SOFTWARE = "SERVER_SOFTWARE".freeze
GATEWAY_INTERFACE = "GATEWAY_INTERFACE".freeze
CGI_VER = "CGI/1.2".freeze
STOP_COMMAND = "?".freeze
HALT_COMMAND = "!".freeze
RESTART_COMMAND = "R".freeze
RACK_INPUT = "rack.input".freeze
RACK_URL_SCHEME = "rack.url_scheme".freeze
RACK_AFTER_REPLY = "rack.after_reply".freeze
PUMA_SOCKET = "puma.socket".freeze
PUMA_CONFIG = "puma.config".freeze
HTTP = "http".freeze
HTTPS = "https".freeze
HTTPS_KEY = "HTTPS".freeze
HTTP_VERSION = "HTTP_VERSION".freeze
HTTP_CONNECTION = "HTTP_CONNECTION".freeze
HTTP_11_200 = "HTTP/1.1 200 OK\r\n".freeze
HTTP_10_200 = "HTTP/1.0 200 OK\r\n".freeze
CLOSE = "close".freeze
KEEP_ALIVE = "Keep-Alive".freeze
CONTENT_LENGTH2 = "Content-Length".freeze
CONTENT_LENGTH_S = "Content-Length: ".freeze
TRANSFER_ENCODING = "Transfer-Encoding".freeze
CONNECTION_CLOSE = "Connection: close\r\n".freeze
CONNECTION_KEEP_ALIVE = "Connection: Keep-Alive\r\n".freeze
TRANSFER_ENCODING_CHUNKED = "Transfer-Encoding: chunked\r\n".freeze
CLOSE_CHUNKED = "0\r\n\r\n".freeze
COLON = ": ".freeze
NEWLINE = "\n".freeze
HIJACK_P = "rack.hijack?".freeze
HIJACK = "rack.hijack".freeze
HIJACK_IO = "rack.hijack_io".freeze

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