shell bypass 403
var autolink = {
name: 'autolink',
tokenize: tokenizeAutolink
}
export default autolink
import assert from 'assert'
import asciiAlpha from '../character/ascii-alpha.mjs'
import asciiAlphanumeric from '../character/ascii-alphanumeric.mjs'
import asciiAtext from '../character/ascii-atext.mjs'
import asciiControl from '../character/ascii-control.mjs'
import codes from '../character/codes.mjs'
import constants from '../constant/constants.mjs'
import types from '../constant/types.mjs'
function tokenizeAutolink(effects, ok, nok) {
var size = 1
return start
function start(code) {
assert(code === codes.lessThan, 'expected `<`')
effects.enter(types.autolink)
effects.enter(types.autolinkMarker)
effects.consume(code)
effects.exit(types.autolinkMarker)
effects.enter(types.autolinkProtocol)
return open
}
function open(code) {
if (asciiAlpha(code)) {
effects.consume(code)
return schemeOrEmailAtext
}
return asciiAtext(code) ? emailAtext(code) : nok(code)
}
function schemeOrEmailAtext(code) {
return code === codes.plusSign ||
code === codes.dash ||
code === codes.dot ||
asciiAlphanumeric(code)
? schemeInsideOrEmailAtext(code)
: emailAtext(code)
}
function schemeInsideOrEmailAtext(code) {
if (code === codes.colon) {
effects.consume(code)
return urlInside
}
if (
(code === codes.plusSign ||
code === codes.dash ||
code === codes.dot ||
asciiAlphanumeric(code)) &&
size++ < constants.autolinkSchemeSizeMax
) {
effects.consume(code)
return schemeInsideOrEmailAtext
}
return emailAtext(code)
}
function urlInside(code) {
if (code === codes.greaterThan) {
effects.exit(types.autolinkProtocol)
return end(code)
}
if (code === codes.space || code === codes.lessThan || asciiControl(code)) {
return nok(code)
}
effects.consume(code)
return urlInside
}
function emailAtext(code) {
if (code === codes.atSign) {
effects.consume(code)
size = 0
return emailAtSignOrDot
}
if (asciiAtext(code)) {
effects.consume(code)
return emailAtext
}
return nok(code)
}
function emailAtSignOrDot(code) {
return asciiAlphanumeric(code) ? emailLabel(code) : nok(code)
}
function emailLabel(code) {
if (code === codes.dot) {
effects.consume(code)
size = 0
return emailAtSignOrDot
}
if (code === codes.greaterThan) {
// Exit, then change the type.
effects.exit(types.autolinkProtocol).type = types.autolinkEmail
return end(code)
}
return emailValue(code)
}
function emailValue(code) {
if (
(code === codes.dash || asciiAlphanumeric(code)) &&
size++ < constants.autolinkDomainSizeMax
) {
effects.consume(code)
return code === codes.dash ? emailValue : emailLabel
}
return nok(code)
}
function end(code) {
assert.equal(code, codes.greaterThan, 'expected `>`')
effects.enter(types.autolinkMarker)
effects.consume(code)
effects.exit(types.autolinkMarker)
effects.exit(types.autolink)
return ok
}
}