laya zip更新方案

1.将要打包的的资源和layaairfiles.txt文件一起打成zip.

2.预加载阶段,先将zip包通过downfile下载并解压到缓存目录.

3.设置baseurl,开始预加载所有资源.

4.下面为node.js编写的自动生成layaairfiles.txt的脚本

var fs = require("fs");

var cacheData = "";
var tmp = {};
var totalSize = 0;
var nowTime = Date.now();
var BaseUrl = "https://0.0.3/";
var BasePath = "./bin/";
var fileList = fs.readdirSync(BasePath);
tmp["fileUsedSize"] = totalSize;
for(var i=0;i<fileList.length;i++){
    var file = fileList[i];
    var stats = fs.statSync(BasePath+file);
    if(stats.isDirectory()){
        readFile(BasePath+file+"/",file+"/");
    }else{
        totalSize += stats.size;
        tmp[BaseUrl+file] = {};
        var data = tmp[BaseUrl+file];
        data["md5"] = prePath+file;
        data["readyUrl"] = BaseUrl+file;
        data["size"] = stats.size;
        data["times"] = nowTime;
        var arr = file.split('.');
        if(arr[1] == "atlas"){
            data["encoding"] = "utf8";
        }else{
            data["encoding"] = "";
        }
    }
}
tmp["fileUsedSize"] = totalSize;
var str = JSON.stringify(tmp);
fs.writeFileSync('./layaairfiles.txt',str);

function readFile(readurl,prePath){
    var fileList = fs.readdirSync(readurl);
    for(var i=0;i<fileList.length;i++){
        var file = fileList[i];
        var stats = fs.statSync(readurl+file);
        if(stats.isDirectory()){
            readFile(readurl+"/"+file+"/",prePath+file+"/");
        }else{
            totalSize += stats.size;
            tmp[BaseUrl+prePath+file] = {};
            var data = tmp[BaseUrl+prePath+file];
            data["md5"] = prePath+file;
            data["readyUrl"] = BaseUrl+prePath+file;
            data["size"] = stats.size;
            data["times"] = nowTime;
            var arr = file.split('.');
            if(arr[1] == "atlas"){
                data["encoding"] = "utf8";
            }else{
                data["encoding"] = "";
            }
        }
    }
}

5.将下载下来的zip文件解压到缓存目录

Laya.MiniAdpter.removeAll();
wx.getFileSystemManager().unzip({
    zipFilePath: res.tempFilePath,
    targetPath: laya.wx.mini.MiniFileMgr.fileNativeDir,
    success: () => {
        this.unzipSuccess();
    },
    fail: (res) => {
        this.unzipFail(res);
    }
});

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