在执行的最后一步的时候 为什么安装失败 [ 新手入门 ]

F:\webadmin\webtests>php -r "readfile('https://getcomposer.org/installer');" | php
#!/usr/bin/env php
All settings correct for using Composer
Downloading...

Composer successfully installed to: F:\webadmin\webtests\composer.phar
Use it: php composer.phar

F:\webadmin\webtests>php composer.phar global require "fxp/composer-asset-plugin:1.0.0"
Changed current directory to C:/Users/nuo/AppData/Roaming/Composer
./composer.json has been created
Loading composer repositories with package information
Updating dependencies (including require-dev)
Failed to decode response: zlib_decode(): data error
Retrying with degraded mode, check https://getcomposer.org/doc/articles/troubleshooting.md#degraded-mode for more info

 [ErrorException]
  zlib_decode(): data error

require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-update] [--update-no-dev] [--update-with-dependencies] [--ignore-platform-reqs] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--] [<packages>]...

F:\webadmin\webtests>