使用composer下载扩展包的时候报错：
[ComposerDownloaderTransportException]
curl error 61 while downloading https://mirrors.aliyun.com/composer/p2/topthink/think-multi-app.json: Error while processing content unencoding: Unknown failure within deco
mpression software.

解决方案：
此时清理一下缓存，重置一下仓库即可

    composer clearcache
//我之前镜像设置的是阿里云镜像（composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/）现在需要作出更改

composer config -g repo.packagist composer https://packagist.org