SSR 链接解析

ssrLinkParser.js

// https://github.com/shadowsocksr-backup/shadowsocks-rss/wiki/SSR-QRcode-scheme


// https://stackoverflow.com/a/30106551/3074866
function b64DecodeUnicode(str) {
    return decodeURIComponent(Array.prototype.map.call(atob(str), function(c) {
        return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)
    }).join(''))
}

decodeUrlSafeBase64 = (sBase64) => {
    return b64DecodeUnicode(sBase64.replace(/_/g, '/').replace(/-/g, '+'))
}


parseSsrLink = (sUrl) => {
     if (!sUrl.match("^ssr:.*")) {
        return "Invalid SSR link."
    }
    
    sUrl = sUrl.replace("ssr://", '')
    const sResult = decodeUrlSafeBase64(sUrl),    
            aConfig = sResult.split('/?'),
            aRequired = aConfig[0].split(":"),
            aOptional = aConfig[1].split('&').map((item) => item.split("=")),
            oRequired = {
                host: aRequired[0],
                port: aRequired[1],
                protocol: aRequired[2],
                method: aRequired[3],
                obfs: aRequired[4],
                pass: decodeUrlSafeBase64(aRequired[5]),
            };
    let oOptional = {};
    aOptional.forEach(function(data){
        try {
           oOptional[data[0]] = decodeUrlSafeBase64(data[1])
        } catch (e) {
            console.log(data)
        }
    });

    // ssr://base64(host:port:protocol:method:obfs:base64pass/?obfsparam=base64param&protoparam=base64param&remarks=base64remarks&group=base64group&udpport=0&uot=0)
    return {
        required: oRequired,
        optional: oOptional
    };
}

// sUrl = 'ssr://MTI3LjAuMC4xOjEyMzQ6YXV0aF9hZXMxMjhfbWQ1OmFlcy0xMjgtY2ZiOnRsczEuMl90aWNrZXRfYXV0aDpZV0ZoWW1KaS8_b2Jmc3BhcmFtPVluSmxZV3QzWVRFeExtMXZaUSZyZW1hcmtzPTVyV0w2Sy1WNUxpdDVwYUg'
// parseSsrLink(sUrl)

https://gist.github.com/jizusun/3b6b1ac3166c40748d85b7cc3051d7c4#file-ssrlinkparser-js