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我最近從ruby-aaws寶石移到asin寶石，這是很容易使用和理解。但是，我遇到了一個非常奇怪的問題，它會導致特定查詢的搜索失敗，並且只會在heroku上發生。紅寶石asin寶石搜索失敗heroku
我的代碼如下：
require 'asin'
client = ASIN::Client.instance
client.search(:Keywords => "Shark Tale", :SearchIndex => :UnboxVideo, :ResponseGroup => :ItemAttributes)
當這個運行在我的本地盒，它可以完美運行沒有問題。但是，當我在heroku上運行此操作時，我看到以下錯誤日誌：
REXML::ParseException: #<NoMethodError: undefined method `[]' for nil:NilClass>
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:340:in `pull_event'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:183:in `pull'
/app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:203:in `parse'
/app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:235:in `parse'
/app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:375:in `call'
/app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:197:in `search'
(irb):223:in `irb_binding'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/workspace.rb:86:in `eval'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/workspace.rb:86:in `evaluate'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/context.rb:380:in `evaluate'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:492:in `block (2 levels) in eval_input'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:624:in `signal_status'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:489:in `block in eval_input'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:247:in `block (2 levels) in each_top_level_statement'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:233:in `loop'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:233:in `block in each_top_level_statement'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:232:in `catch'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:232:in `each_top_level_statement'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:488:in `eval_input'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:397:in `block in start'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:396:in `catch'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:396:in `start'
/app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start'
/app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start'
/app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>'
script/rails:6:in `require'
script/rails:6:in `<main>'
...
Exception parsing
Line: 1
Position: 30315
Last 80 unconsumed characters:
Actor><Actor>Matthew Broderick</Actor><Actor>Patrick Warburton</Actor><Actor>J
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:439:in `rescue in pull_event'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:331:in `pull_event'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:183:in `pull'
from /app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:203:in `parse'
from /app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:235:in `parse'
from /app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:375:in `call'
from /app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:197:in `search'
from (irb):223
from /app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
這在Heroku的大約10次中失敗了。我嘗試了一些變化和下面的一些變化，成功的所有時間：
改變查詢略有
client.search(:Keywords => "Shark Tales", :SearchIndex => :UnboxVideo, :ResponseGroup => :ItemAttributes)
更改ResponseGroup
client.search(:Keywords => "Shark Tale", :SearchIndex => :UnboxVideo, :ResponseGroup => :Offers)
有誰知道是什麼引起的？
的作者爲2.0.0的解決方案看起來你從亞馬遜獲得格式不正確的XML（儘管這看起來不太可能）。你可以將ASIN日誌級別設置爲info並將輸出發佈到某處？特別是應該有一個消息，說「得到迴應= ...」。像'ASIN :: Configuration.logger.level = Logger :: INFO'可能會這樣做。 – georgebrock