mirror of https://gitee.com/openkylin/nodejs.git
71 lines
1.8 KiB
JavaScript
71 lines
1.8 KiB
JavaScript
'use strict';
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const {
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RegExp,
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Symbol,
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} = primordials;
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const Buffer = require('buffer').Buffer;
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const { writeBuffer } = internalBinding('fs');
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const errors = require('internal/errors');
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// IPv4 Segment
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const v4Seg = '(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])';
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const v4Str = `(${v4Seg}[.]){3}${v4Seg}`;
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const IPv4Reg = new RegExp(`^${v4Str}$`);
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// IPv6 Segment
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const v6Seg = '(?:[0-9a-fA-F]{1,4})';
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const IPv6Reg = new RegExp('^(' +
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`(?:${v6Seg}:){7}(?:${v6Seg}|:)|` +
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`(?:${v6Seg}:){6}(?:${v4Str}|:${v6Seg}|:)|` +
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`(?:${v6Seg}:){5}(?::${v4Str}|(:${v6Seg}){1,2}|:)|` +
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`(?:${v6Seg}:){4}(?:(:${v6Seg}){0,1}:${v4Str}|(:${v6Seg}){1,3}|:)|` +
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`(?:${v6Seg}:){3}(?:(:${v6Seg}){0,2}:${v4Str}|(:${v6Seg}){1,4}|:)|` +
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`(?:${v6Seg}:){2}(?:(:${v6Seg}){0,3}:${v4Str}|(:${v6Seg}){1,5}|:)|` +
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`(?:${v6Seg}:){1}(?:(:${v6Seg}){0,4}:${v4Str}|(:${v6Seg}){1,6}|:)|` +
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`(?::((?::${v6Seg}){0,5}:${v4Str}|(?::${v6Seg}){1,7}|:))` +
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')(%[0-9a-zA-Z-.:]{1,})?$');
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function isIPv4(s) {
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return IPv4Reg.test(s);
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}
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function isIPv6(s) {
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return IPv6Reg.test(s);
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}
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function isIP(s) {
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if (isIPv4(s)) return 4;
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if (isIPv6(s)) return 6;
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return 0;
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}
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function makeSyncWrite(fd) {
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return function(chunk, enc, cb) {
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if (enc !== 'buffer')
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chunk = Buffer.from(chunk, enc);
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this._handle.bytesWritten += chunk.length;
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const ctx = {};
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writeBuffer(fd, chunk, 0, chunk.length, null, undefined, ctx);
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if (ctx.errno !== undefined) {
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const ex = errors.uvException(ctx);
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// Legacy: net writes have .code === .errno, whereas writeBuffer gives the
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// raw errno number in .errno.
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ex.errno = ex.code;
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return cb(ex);
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}
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cb();
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};
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}
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module.exports = {
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isIP,
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isIPv4,
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isIPv6,
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makeSyncWrite,
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normalizedArgsSymbol: Symbol('normalizedArgs')
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};
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