我安装了作曲家，一切正常。当我运行composer -V时，我收到关于Xdebug的警告。
You are running composer with xdebug enabled. This has a major impact on runtime performance. See https://getcomposer.org/xdebug
Composer version 1.0-dev (4c0e163977f8289288df7b37e0fd0469d3e8cbc6) 2016-02-20 19:28:03
我尝试使用composer require slim/slim "^3.0"安装Slim Framework并收到以下错误：
Loading composer repositories with package information
[Composer\Downloader\TransportException]
The "https://packagist.org/packages.json" file could not be downloaded: SSL
: Connection reset by peer
Failed to enable crypto
failed to open stream: operation failed
我不确定，但认为问题是代理，所以我尝试了提出的解决方案here和here。
export HTTP_PROXY="http://127.0.0.1:3128"
export HTTP_PROXY_REQUEST_FULLURI=0
export HTTPS_PROXY_REQUEST_FULLURI=0
仍然无效。我还在GitHub上找到了this closed issue，但一切正常。
以下是composer diag的结果：
You are running composer with xdebug enabled. This has a major impact on runtime performance. See https://getcomposer.org/xdebug
Checking composer.json: FAIL
No license specified, it is recommended to do so. For closed-source software you may use "proprietary" as license.
Checking platform settings: FAIL
The xdebug extension is loaded, this can slow down Composer a little.
Disabling it when using Composer is recommended.
Checking git settings: OK
Checking http connectivity to packagist: FAIL
[Composer\Downloader\TransportException] The "http://packagist.org/packages.json" file could not be downloaded (HTTP/1.1 502 Proxy Error ( The URL does not use a recognized protocol. There is no support for the protocol or application not )
Checking https connectivity to packagist: FAIL
[Composer\Downloader\TransportException] The "https://packagist.org/packages.json" file could not be downloaded: SSL: Connection reset by peer
Failed to enable crypto
failed to open stream: operation failed
Checking HTTP proxy: FAIL
[Composer\Downloader\TransportException] The "https://packagist.org/packages.json" file could not be downloaded: SSL: Connection reset by peer
Failed to enable crypto
failed to open stream: operation failed
Checking HTTP proxy support for request_fulluri: FAIL
Unable to assess the situation, maybe packagist.org is down (The "http://packagist.org/packages.json" file could not be downloaded (HTTP/1.1 502 Proxy Error ( O URL não usa um protocolo reconhecido. Não há suporte para o protocolo ou a solicitação não ))
Checking HTTPS proxy support for request_fulluri: FAIL
Unable to assess the situation, maybe github is down (The "https://api.github.com/repos/Seldaek/jsonlint/zipball/1.0.0" file could not be downloaded: SSL: Connection reset by peer
Failed to enable crypto
failed to open stream: operation failed)
Checking github.com rate limit: FAIL
[Composer\Downloader\TransportException] The "https://api.github.com/rate_limit" file could not be downloaded: SSL: Connection reset by peer
Failed to enable crypto
failed to open stream: operation failed
Checking disk free space: OK
Checking pubkeys:
Tags Public Key Fingerprint: 57815BA2 7E54DC31 7ECC7CC5 573090D0 87719BA6 8F3BB723 4E5D42D0 84A14642
Dev Public Key Fingerprint: 4AC45767 E5EC2265 2F0C1167 CBBB8A2B 0C708369 153E328C AD90147D AFE50952
OK
Checking composer version:
[Composer\Downloader\TransportException]
The "https://getcomposer.org/version" file could not be downloaded: SSL: Co
nnection reset by peer
Failed to enable crypto
failed to open stream: operation failed
diagnose
还有什么我可以尝试的吗？
注意：
我的操作系统是Ubuntu 14.04，我正在使用CNTLM来处理Windows代理（TMG）。除了作曲家，一切正常（浏览器，apt-get，npm ......）;
答案 0 :(得分：1)
此错误是ssl错误，如果您的网络服务器是apache，而os是centos 7，您可以通过后续步骤修复它： 1.download http://curl.haxx.se/ca/cacert.pem并将其放入〜/ .cacert
2.add php.ini this
openssl.cafile= ~/.cacert/cacert.pem
3.Atartart you apache
systemctl restart httpd.service