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Diffstat (limited to 'alarm/node_modules/tr46/index.js')
-rw-r--r-- | alarm/node_modules/tr46/index.js | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/alarm/node_modules/tr46/index.js b/alarm/node_modules/tr46/index.js deleted file mode 100644 index 9ba36d8..0000000 --- a/alarm/node_modules/tr46/index.js +++ /dev/null @@ -1,297 +0,0 @@ -"use strict"; - -const punycode = require("punycode"); -const regexes = require("./lib/regexes.js"); -const mappingTable = require("./lib/mappingTable.json"); -const { STATUS_MAPPING } = require("./lib/statusMapping.js"); - -function containsNonASCII(str) { - return /[^\x00-\x7F]/.test(str); -} - -function findStatus(val, { useSTD3ASCIIRules }) { - let start = 0; - let end = mappingTable.length - 1; - - while (start <= end) { - const mid = Math.floor((start + end) / 2); - - const target = mappingTable[mid]; - const min = Array.isArray(target[0]) ? target[0][0] : target[0]; - const max = Array.isArray(target[0]) ? target[0][1] : target[0]; - - if (min <= val && max >= val) { - if (useSTD3ASCIIRules && - (target[1] === STATUS_MAPPING.disallowed_STD3_valid || target[1] === STATUS_MAPPING.disallowed_STD3_mapped)) { - return [STATUS_MAPPING.disallowed, ...target.slice(2)]; - } else if (target[1] === STATUS_MAPPING.disallowed_STD3_valid) { - return [STATUS_MAPPING.valid, ...target.slice(2)]; - } else if (target[1] === STATUS_MAPPING.disallowed_STD3_mapped) { - return [STATUS_MAPPING.mapped, ...target.slice(2)]; - } - - return target.slice(1); - } else if (min > val) { - end = mid - 1; - } else { - start = mid + 1; - } - } - - return null; -} - -function mapChars(domainName, { useSTD3ASCIIRules, processingOption }) { - let hasError = false; - let processed = ""; - - for (const ch of domainName) { - const [status, mapping] = findStatus(ch.codePointAt(0), { useSTD3ASCIIRules }); - - switch (status) { - case STATUS_MAPPING.disallowed: - hasError = true; - processed += ch; - break; - case STATUS_MAPPING.ignored: - break; - case STATUS_MAPPING.mapped: - processed += mapping; - break; - case STATUS_MAPPING.deviation: - if (processingOption === "transitional") { - processed += mapping; - } else { - processed += ch; - } - break; - case STATUS_MAPPING.valid: - processed += ch; - break; - } - } - - return { - string: processed, - error: hasError - }; -} - -function validateLabel(label, { checkHyphens, checkBidi, checkJoiners, processingOption, useSTD3ASCIIRules }) { - if (label.normalize("NFC") !== label) { - return false; - } - - const codePoints = Array.from(label); - - if (checkHyphens) { - if ((codePoints[2] === "-" && codePoints[3] === "-") || - (label.startsWith("-") || label.endsWith("-"))) { - return false; - } - } - - if (label.includes(".") || - (codePoints.length > 0 && regexes.combiningMarks.test(codePoints[0]))) { - return false; - } - - for (const ch of codePoints) { - const [status] = findStatus(ch.codePointAt(0), { useSTD3ASCIIRules }); - if ((processingOption === "transitional" && status !== STATUS_MAPPING.valid) || - (processingOption === "nontransitional" && - status !== STATUS_MAPPING.valid && status !== STATUS_MAPPING.deviation)) { - return false; - } - } - - // https://tools.ietf.org/html/rfc5892#appendix-A - if (checkJoiners) { - let last = 0; - for (const [i, ch] of codePoints.entries()) { - if (ch === "\u200C" || ch === "\u200D") { - if (i > 0) { - if (regexes.combiningClassVirama.test(codePoints[i - 1])) { - continue; - } - if (ch === "\u200C") { - // TODO: make this more efficient - const next = codePoints.indexOf("\u200C", i + 1); - const test = next < 0 ? codePoints.slice(last) : codePoints.slice(last, next); - if (regexes.validZWNJ.test(test.join(""))) { - last = i + 1; - continue; - } - } - } - return false; - } - } - } - - // https://tools.ietf.org/html/rfc5893#section-2 - if (checkBidi) { - let rtl; - - // 1 - if (regexes.bidiS1LTR.test(codePoints[0])) { - rtl = false; - } else if (regexes.bidiS1RTL.test(codePoints[0])) { - rtl = true; - } else { - return false; - } - - if (rtl) { - // 2-4 - if (!regexes.bidiS2.test(label) || - !regexes.bidiS3.test(label) || - (regexes.bidiS4EN.test(label) && regexes.bidiS4AN.test(label))) { - return false; - } - } else if (!regexes.bidiS5.test(label) || - !regexes.bidiS6.test(label)) { // 5-6 - return false; - } - } - - return true; -} - -function isBidiDomain(labels) { - const domain = labels.map(label => { - if (label.startsWith("xn--")) { - try { - return punycode.decode(label.substring(4)); - } catch (err) { - return ""; - } - } - return label; - }).join("."); - return regexes.bidiDomain.test(domain); -} - -function processing(domainName, options) { - const { processingOption } = options; - - // 1. Map. - let { string, error } = mapChars(domainName, options); - - // 2. Normalize. - string = string.normalize("NFC"); - - // 3. Break. - const labels = string.split("."); - const isBidi = isBidiDomain(labels); - - // 4. Convert/Validate. - for (const [i, origLabel] of labels.entries()) { - let label = origLabel; - let curProcessing = processingOption; - if (label.startsWith("xn--")) { - try { - label = punycode.decode(label.substring(4)); - labels[i] = label; - } catch (err) { - error = true; - continue; - } - curProcessing = "nontransitional"; - } - - // No need to validate if we already know there is an error. - if (error) { - continue; - } - const validation = validateLabel(label, Object.assign({}, options, { - processingOption: curProcessing, - checkBidi: options.checkBidi && isBidi - })); - if (!validation) { - error = true; - } - } - - return { - string: labels.join("."), - error - }; -} - -function toASCII(domainName, { - checkHyphens = false, - checkBidi = false, - checkJoiners = false, - useSTD3ASCIIRules = false, - processingOption = "nontransitional", - verifyDNSLength = false -} = {}) { - if (processingOption !== "transitional" && processingOption !== "nontransitional") { - throw new RangeError("processingOption must be either transitional or nontransitional"); - } - - const result = processing(domainName, { - processingOption, - checkHyphens, - checkBidi, - checkJoiners, - useSTD3ASCIIRules - }); - let labels = result.string.split("."); - labels = labels.map(l => { - if (containsNonASCII(l)) { - try { - return "xn--" + punycode.encode(l); - } catch (e) { - result.error = true; - } - } - return l; - }); - - if (verifyDNSLength) { - const total = labels.join(".").length; - if (total > 253 || total === 0) { - result.error = true; - } - - for (let i = 0; i < labels.length; ++i) { - if (labels[i].length > 63 || labels[i].length === 0) { - result.error = true; - break; - } - } - } - - if (result.error) { - return null; - } - return labels.join("."); -} - -function toUnicode(domainName, { - checkHyphens = false, - checkBidi = false, - checkJoiners = false, - useSTD3ASCIIRules = false, - processingOption = "nontransitional" -} = {}) { - const result = processing(domainName, { - processingOption, - checkHyphens, - checkBidi, - checkJoiners, - useSTD3ASCIIRules - }); - - return { - domain: result.string, - error: result.error - }; -} - -module.exports = { - toASCII, - toUnicode -}; |