404错误与开放铀在耙子任务...是什么原因？ [英] 404 error with open-uri in a rake task... what's causing it?

问题描述

我有一个耙子任务从API获取JSON数据，解析它，并将其保存到数据库中：

  task：embedly => ：environment do 
 require'json'
 require'uri'
 require'open-uri'
 
 Video.all.each do | video | 
 json_stream = open（http://api.embed.ly/1/oembed?key=08b652e6b3ea11e0ae3f4040d3dc5c07&url=#{video.video_url}&maxwidth=525）
 ruby​​_hash = JSON。 parse（json_stream.read）
 thumbnail_url = ruby​​_hash ['thumbnail_url'] 
 embed_code = ruby​​_hash ['html'] 
 video.update_attributes（：thumbnail_url => thumbnail_url，：embed_code => embed_code）
 end 
 end 
  

我在堆栈跟踪中收到此错误我执行耙子任务，我不知道是什么原因造成的：

 耙子中止！ 
 404找不到
 /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:277:in`open_http'
 /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:616:in`buffer_open'
 /System/Library/Frameworks/Ruby.framework/版本/ 1.8 / usr / lib / ruby​​ / 1.8 / open-uri.rb：164：在`open_loop'
 /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8 /open-uri.rb:162:in`catch'
 /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:162:in` open_loop'
 /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:132:in`open_uri'
 /系统/库/框架/ Ruby.framework /版本/ 1.8 / usr / lib / ruby​​ / 1.8 / open-uri.rb：518：在`open'
 /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr /lib/ruby/1.8/open-uri.rb:30:in`open'
 /rubyprograms/dreamstill/lib/tasks/tasks.rake:16 
 / ruby​​programs / dreamstill / lib / tasks / tasks.rake：15：在`eac h'
 /rubyprograms/dreamstill/lib/tasks/tasks.rake:15 
 /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
 /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in`execute'
 /Library/Ruby/Gems/1.8/gems /rake-0.8.7/lib/rake.rb:631:in`each'
 /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in`执行'
 /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in`invoke_with_call_chain'
 /System/Library/Frameworks/Ruby.framework/版本/ 1.8 / usr / lib / ruby​​ / 1.8 / monitor.rb：242：在`synchronize'
  

任何关于问题的想法和如何解决？

解决方案

如果指定的资源（embed.ly api）返回404，视频/图片）不存在。 OpenURI将此处理为异常。要捕获错误，您可以执行以下操作：

  task：embedly => ：environment do 
 require'json'
 require'uri'
 require'open-uri'
 
 Video.all.each do | video | 
 begin 
 json_stream = open（http://api.embed.ly/1/oembed?key=08b652e6b3ea11e0ae3f4040d3dc5c07&url=#{video.video_url}&maxwidth=525）
 ruby​​_hash = JSON.parse（json_stream.read）
 thumbnail_url = ruby​​_hash ['thumbnail_url'] 
 embed_code = ruby​​_hash ['html'] 
 video.update_attributes（：thumbnail_url => thumbnail_url， ：embed_code => embed_code）
 rescue OpenURI :: HTTPError => ex 
放置处理视频丢失
 end 
 end 
 end 
  

您还可以在运行任务之前检查视频/网址是否有效。

I have a rake task that fetches JSON data from an API, parses it, and saves it to the database:

task :embedly => :environment do
  require 'json'
  require 'uri'
  require 'open-uri'

  Video.all.each do |video|
    json_stream = open("http://api.embed.ly/1/oembed?key=08b652e6b3ea11e0ae3f4040d3dc5c07&url=#{video.video_url}&maxwidth=525")
    ruby_hash = JSON.parse(json_stream.read)
    thumbnail_url = ruby_hash['thumbnail_url']
    embed_code = ruby_hash['html']
    video.update_attributes(:thumbnail_url => thumbnail_url, :embed_code => embed_code)
  end  
end

I get this error in the stack trace when I run the rake task and I have no idea what is causing it:

rake aborted!
404 Not Found
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:277:in `open_http'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:616:in `buffer_open'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:164:in `open_loop'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:162:in `catch'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:162:in `open_loop'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:132:in `open_uri'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:518:in `open'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:30:in `open'
/rubyprograms/dreamstill/lib/tasks/tasks.rake:16
/rubyprograms/dreamstill/lib/tasks/tasks.rake:15:in `each'
/rubyprograms/dreamstill/lib/tasks/tasks.rake:15
/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'

Any ideas on the problem and how to resolve it?

解决方案

The embed.ly api returns a 404 if the specified resource(video/picture) doesn't exist. OpenURI handles this as an exception. To catch the error you could do something like this:

task :embedly => :environment do
  require 'json'
  require 'uri'
  require 'open-uri'

  Video.all.each do |video|
    begin
      json_stream = open("http://api.embed.ly/1/oembed?key=08b652e6b3ea11e0ae3f4040d3dc5c07&url=#{video.video_url}&maxwidth=525")
      ruby_hash = JSON.parse(json_stream.read)
      thumbnail_url = ruby_hash['thumbnail_url']
      embed_code = ruby_hash['html']
      video.update_attributes(:thumbnail_url => thumbnail_url, :embed_code => embed_code)
    rescue OpenURI::HTTPError => ex
      puts "Handle missing video here"
    end 
  end  
end

You could also check if the videos/urls are valid before running the task.

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