有时候composer install/update的时候会报错：

[Composer\Downloader\TransportException]                                                                                                                          

  Your configuration does not allow connection to http://ooxx/xxoo.git. See https://getcomposer.org/doc/06-config.md#secure-http for details.

解决方法是设置一个本地或全局的composer配置：

composer config secure-http false

全局设置：

composer config -g secure-http false

意义是默认禁用https请求，就可以了