当我在 Sinatra/Ruby 应用程序中解析联盟提要时,出现错误:
/opt/rh/ruby200/root/usr/share/ruby/net/http/response.rb:368: [BUG]
Segmentation fault ruby 2.0.0p645 (2015-04-13) [x86_64-linux]
我想知道这是 Ruby 的错误还是代码有问题,如果是,我该如何修复它?
这是解析联盟提要的代码:
feeds.each { |name, hash|
puts "=== PARSING #{name.upcase} FEED ==="
start = Time.now
open(hash[:url]) { |feed|
send(hash[:action], feed)
}
duration = Time.now - start
puts "Feed syndication completed in #{duration.to_s} seconds."
puts
}
# Close DB connection
puts "Disconnecting"
@db.disconnect
end
def parseAllianceData(xml)
start = Time.now
allianceData = XMLObject.new xml
duration = Time.now - start
puts "XML parsed in #{duration.to_s} seconds."
puts "Alliances found: #{allianceData.alliances.count}"
@db[:feeds].insert(
:generated_at => allianceData.server.datagenerationdatetime,
:type => "Alliance",
:is_current => true)
start = Time.now
allianceData.alliances.each { |alliance|
capital_last_moved_at = (alliance.alliancecapitallastmoved rescue nil)
taxrate_last_changed_at = (alliance.alliancetaxratelastchanged rescue nil)
@db[:alliance].insert(
:id => alliance.alliance[:id],
:ticker => alliance.allianceticker,
:name => alliance.alliance,
:founded_at => alliance.foundeddatetime,
:founded_by_player_id => alliance.foundedbyplayerid[:id],
:capital_town_id => alliance.alliancecapitaltownid[:id],
:member_count => alliance.membercount,
:total_population => (alliance.totalpopulation rescue 0),
:tax_rate => (alliance.alliancetaxrate.to_i) / 100.0,
:tax_rate_last_changed_at => taxrate_last_changed_at,
:capital_town_last_moved_at => capital_last_moved_at)
alliance.roles.each { |role|
@db[:alliance_roles].insert(
:id => role.role[:id],
:name => role.role,
:alliance_id => alliance.alliance[:id],
:hierarchy_id => role.heirarchy[:id])
}
}
duration = Time.now - start
puts "Database populated in #{duration.to_s} seconds."
最佳答案
我在您的示例中发现了一行危险的代码:
send(hash[:action], feed)
它从外部源 (hash[:action]
) 获取一些字符串并将其转换为方法调用。这是非常危险的,因为你永远不知道你会得到什么字符串。那里可能有一个字符串无法进入方法调用,因此 Ruby 崩溃。
我建议明确检查所有支持的操作和调用方法。例如,您可以使用 case
语句来完成。
action = hash[:action]
case action
when 'action1'
call_method1
when 'action2'
call_method2
else
puts "unsupported action: #{action}"
end
关于ruby-on-rails - 如何修复 Ruby 2.0.0p645 的段错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34574994/