为什么 require mongo 给我 LoadError: no such file to load -- openssl

我正在使用 Ubuntu Server 10，Ruby 1.9.2

当我尝试要求“mongo”时

它给了我这个错误：

irb(main):001:0> require 'mongo'
LoadError: no such file to load -- openssl
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/mongo-1.5.2/lib/mongo/util/ssl_socket.rb:1:in `<top (required)>'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/mongo-1.5.2/lib/mongo.rb:63:in `<top (required)>'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `require'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `rescue in require'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
    from (irb):1
    from /usr/local/bin/irb:12:in `<main>'

您需要两件事：OpenSSL 本身和 OpenSSL 的 ruby​​ 绑定。第一部分正如 Yossi 所说：

sudo apt-get install libssl

第二个取决于你如何安装 ruby​​。我从你问题中的路径猜测你是从源代码编译红宝石的。在这种情况下，您首先需要确保有 openssl 标头：

sudo apt-get install libssl-dev

那么当你编译 ruby​​ 时它应该会被自动选取。如果您不想重新编译 ruby​​，您应该能够通过以下方式构建 OpenSSL 绑定

• cd 到包含 ruby​​ 源的文件夹
• cd 到 ext/openssl
• ruby extconf.rb
• make && sudo make install