73 lines
2.3 KiB
JavaScript
73 lines
2.3 KiB
JavaScript
const utils = {
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getUserIP: function () {
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var MyPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection
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var pc = new MyPeerConnection({
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iceServers: []
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})
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var noop = function () {}
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var localIPs = {}
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var newObj = {}
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var ipRegex = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g
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function iterateIP (ip) {
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if (!localIPs[ip]) localStorage.setItem('localip', ip)
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localIPs[ip] = true
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newObj['ip'] = ip
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}
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pc.createDataChannel('')
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pc.createOffer().then(function (sdp) {
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sdp.sdp.split('\n').forEach(function (line) {
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if (line.indexOf('candidate') < 0) return
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line.match(ipRegex).forEach(iterateIP)
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})
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pc.setLocalDescription(sdp, noop, noop)
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}).catch(function (reason) {
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// An error occurred, so handle the failure to connect
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})
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pc.onicecandidate = function (ice) {
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if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return
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ice.candidate.candidate.match(ipRegex).forEach(iterateIP)
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}
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return newObj
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},
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// 小数加法
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accAdd (arg1, arg2) {
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var r1, r2, m, c
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try {
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r1 = arg1.toString().split('.')[1].length
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} catch (e) {
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r1 = 0
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}
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try {
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r2 = arg2.toString().split('.')[1].length
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} catch (e) {
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r2 = 0
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}
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c = Math.abs(r1 - r2)
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m = Math.pow(10, Math.max(r1, r2))
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if (c > 0) {
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var cm = Math.pow(10, c)
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if (r1 > r2) {
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arg1 = Number(arg1.toString().replace('.', ''))
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arg2 = Number(arg2.toString().replace('.', '')) * cm
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} else {
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arg1 = Number(arg1.toString().replace('.', '')) * cm
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arg2 = Number(arg2.toString().replace('.', ''))
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}
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} else {
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arg1 = Number(arg1.toString().replace('.', ''))
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arg2 = Number(arg2.toString().replace('.', ''))
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}
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return (arg1 + arg2) / m
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},
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// 乘法
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accMul (arg1, arg2) {
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var m = 0
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var s1 = arg1.toString()
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var s2 = arg2.toString()
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try { m += s1.split('.')[1].length } catch (e) {}
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try { m += s2.split('.')[1].length } catch (e) {}
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return Number(s1.replace('.', '')) * Number(s2.replace('.', '')) / Math.pow(10, m)
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}
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}
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export default utils
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