Module: Puma::Const
Overview
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.
Constant Summary collapse
- PERSISTENT_TIMEOUT =
The default number of seconds for another request within a persistent session.
20- DATE =
"Date".freeze
- SCRIPT_NAME =
"SCRIPT_NAME".freeze
- REQUEST_URI =
The original URI requested by the client.
'REQUEST_URI'.freeze
- REQUEST_PATH =
'REQUEST_PATH'.freeze
- PATH_INFO =
'PATH_INFO'.freeze
- PUMA_VERSION =
VERSION = "1.1.1".freeze
- PUMA_TMP_BASE =
"puma".freeze
- ERROR_404_RESPONSE =
The standard empty 404 response for bad requests. Use Error4040Handler for custom stuff.
"HTTP/1.1 404 Not Found\r\nConnection: close\r\nServer: Puma #{PUMA_VERSION}\r\n\r\nNOT FOUND".freeze
- CONTENT_LENGTH =
"CONTENT_LENGTH".freeze
- ERROR_503_RESPONSE =
A common header for indicating the server is too busy. Not used yet.
"HTTP/1.1 503 Service Unavailable\r\n\r\nBUSY".freeze
- CHUNK_SIZE =
The basic max request size we’ll try to read.
16 * 1024
- MAX_HEADER =
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.
1024 * (80 + 32)
- MAX_BODY =
Maximum request body size before it is moved out of memory and into a tempfile for reading.
MAX_HEADER- STATUS_FORMAT =
A frozen format for this is about 15% faster
"HTTP/1.1 %d %s\r\nConnection: close\r\n".freeze
- 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 =
ETag is based on the apache standard of hex mtime-size-inode (inode is 0 on win32)
"\"%x-%x-%x\"".freeze
- 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
- 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
- RACK_INPUT =
"rack.input".freeze
- RACK_URL_SCHEME =
"rack.url_scheme".freeze
- RACK_AFTER_REPLY =
"rack.after_reply".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