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| 'use strict'
var transport = require('../../../spdy-transport')
var base = transport.protocol.base
var util = require('util')
var Buffer = require('buffer').Buffer
exports.PREFACE_SIZE = 24
exports.PREFACE = 'PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n'
exports.PREFACE_BUFFER = new Buffer(exports.PREFACE)
exports.PING_OPAQUE_SIZE = 8
exports.FRAME_HEADER_SIZE = 9
exports.INITIAL_MAX_FRAME_SIZE = 16384
exports.ABSOLUTE_MAX_FRAME_SIZE = 16777215
exports.HEADER_TABLE_SIZE = 4096
exports.DEFAULT_MAX_HEADER_LIST_SIZE = 80 * 1024 // as in http_parser
exports.MAX_INITIAL_WINDOW_SIZE = 2147483647
exports.DEFAULT_WEIGHT = 16
exports.MAX_CONCURRENT_STREAMS = Infinity
exports.frameType = {
DATA: 0,
HEADERS: 1,
PRIORITY: 2,
RST_STREAM: 3,
SETTINGS: 4,
PUSH_PROMISE: 5,
PING: 6,
GOAWAY: 7,
WINDOW_UPDATE: 8,
CONTINUATION: 9,
// Custom
X_FORWARDED_FOR: 0xde
}
exports.flags = {
ACK: 0x01, // SETTINGS-only
END_STREAM: 0x01,
END_HEADERS: 0x04,
PADDED: 0x08,
PRIORITY: 0x20
}
exports.settings = {
SETTINGS_HEADER_TABLE_SIZE: 0x01,
SETTINGS_ENABLE_PUSH: 0x02,
SETTINGS_MAX_CONCURRENT_STREAMS: 0x03,
SETTINGS_INITIAL_WINDOW_SIZE: 0x04,
SETTINGS_MAX_FRAME_SIZE: 0x05,
SETTINGS_MAX_HEADER_LIST_SIZE: 0x06
}
exports.settingsIndex = [
null,
'header_table_size',
'enable_push',
'max_concurrent_streams',
'initial_window_size',
'max_frame_size',
'max_header_list_size'
]
exports.error = {
OK: 0,
NO_ERROR: 0,
PROTOCOL_ERROR: 1,
INTERNAL_ERROR: 2,
FLOW_CONTROL_ERROR: 3,
SETTINGS_TIMEOUT: 4,
STREAM_CLOSED: 5,
INVALID_STREAM: 5,
FRAME_SIZE_ERROR: 6,
REFUSED_STREAM: 7,
CANCEL: 8,
COMPRESSION_ERROR: 9,
CONNECT_ERROR: 10,
ENHANCE_YOUR_CALM: 11,
INADEQUATE_SECURITY: 12,
HTTP_1_1_REQUIRED: 13
}
exports.errorByCode = base.utils.reverse(exports.error)
exports.DEFAULT_WINDOW = 64 * 1024 - 1
exports.goaway = exports.error
exports.goawayByCode = util._extend({}, exports.errorByCode)
exports.goawayByCode[0] = 'OK'
|