bilibili-emote-downloader

main.groovy

import groovy.json.JsonSlurper

def download(URL from, File to) {
    if (to.exists()) {
        println "Skip `${to.canonicalPath}`";
    } else {
        to.createParentDirectories();
        println "Download `${to.canonicalPath}` from `${from.toString()}`";
        to << from.openStream();
    }
    return to;
}

def saveDirectory = './emote';

1.upto(5000) { id ->
    def result = new URI("https://api.bilibili.com/x/emote/package?business=reply&ids=${id}")
                    .toURL()
                    .openConnection()
                    .inputStream
                    .text;
    def slurper = new JsonSlurper();
    def packages = slurper.parseText(result).data.packages;
    packages?.each { pkg ->
        def pkgName = pkg.text;

        pkg.emote?.findAll {
            it.type != 4
        }.each { emote ->
            def url = new URI(emote.url).toURL();
            def emoteName = emote.text.replaceAll(/(^\[|\]$)/, "");
            def ext = emote.url.find(/\.\w+$/);
            def savePath = new File("${saveDirectory}/${pkgName}/${emoteName}${ext}");
            download(url, savePath);
        }
    }
}