診斷髮生在我的代碼外部的NoMethodError

我使用omniauth和omniauth-mapmyfitness-oauth2來允許MapMyFitness用戶登錄我的網站。診斷髮生在我的代碼外部的NoMethodError

最近，我已經有幾次登錄嘗試導致下面的錯誤。它看起來沒有任何錯誤發生在我的Rails應用程序的代碼中 - 看起來它完全在ruby，一些寶石或MapMyFitness API中。

任何方向/信息/建議如何調試這在所有將不勝感激。我之前沒有遇到過這樣的問題，所以這是一個巨大的學習機會。

NoMethodError (undefined method `strip' for nil:NilClass): 
    /usr/lib/ruby/1.9.1/net/http.rb:1435:in `block in initialize_http_header' 
    /usr/lib/ruby/1.9.1/net/http.rb:1433:in `each' 
    /usr/lib/ruby/1.9.1/net/http.rb:1433:in `initialize_http_header' 
    /usr/lib/ruby/1.9.1/net/http.rb:1862:in `initialize' 
    faraday (0.8.9) lib/faraday/adapter/net_http.rb:55:in `new' 
    faraday (0.8.9) lib/faraday/adapter/net_http.rb:55:in `create_request' 
    faraday (0.8.9) lib/faraday/adapter/net_http.rb:75:in `perform_request' 
    faraday (0.8.9) lib/faraday/adapter/net_http.rb:38:in `call' 
    faraday (0.8.9) lib/faraday/request/url_encoded.rb:14:in `call' 
    faraday (0.8.9) lib/faraday/connection.rb:253:in `run_request' 
    oauth2 (0.9.3) lib/oauth2/client.rb:90:in `request' 
    oauth2 (0.9.3) lib/oauth2/client.rb:135:in `get_token' 
    oauth2 (0.9.3) lib/oauth2/strategy/auth_code.rb:29:in `get_token' 
    omniauth-oauth2 (1.1.2) lib/omniauth/strategies/oauth2.rb:93:in `build_access_token' 
    omniauth-oauth2 (1.1.2) lib/omniauth/strategies/oauth2.rb:75:in `callback_phase' 
    omniauth (1.2.1) lib/omniauth/strategy.rb:227:in `callback_call' 
    omniauth (1.2.1) lib/omniauth/strategy.rb:184:in `call!' 
    omniauth (1.2.1) lib/omniauth/strategy.rb:164:in `call' 
    omniauth (1.2.1) lib/omniauth/strategy.rb:186:in `call!' 
    omniauth (1.2.1) lib/omniauth/strategy.rb:164:in `call' 
    newrelic_rpm (3.8.0.218) lib/new_relic/rack/error_collector.rb:55:in `call' 
    newrelic_rpm (3.8.0.218) lib/new_relic/rack/agent_hooks.rb:32:in `call' 
    newrelic_rpm (3.8.0.218) lib/new_relic/rack/browser_monitoring.rb:27:in `call' 
    warden (1.2.3) lib/warden/manager.rb:35:in `block in call' 
    warden (1.2.3) lib/warden/manager.rb:34:in `catch' 
    warden (1.2.3) lib/warden/manager.rb:34:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
    rack (1.4.5) lib/rack/etag.rb:23:in `call' 
    rack (1.4.5) lib/rack/conditionalget.rb:25:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/head.rb:14:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/flash.rb:242:in `call' 
    rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context' 
    rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/cookies.rb:341:in `call' 
    activerecord (3.2.18) lib/active_record/query_cache.rb:64:in `call' 
    activerecord (3.2.18) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call' 
    activesupport (3.2.18) lib/active_support/callbacks.rb:405:in `_run__3877922931106558540__call__1275774963243928783__callbacks' 
    activesupport (3.2.18) lib/active_support/callbacks.rb:405:in `__run_callback' 
    activesupport (3.2.18) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' 
    activesupport (3.2.18) lib/active_support/callbacks.rb:81:in `run_callbacks' 
    actionpack (3.2.18) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' 
    airbrake (3.1.16) lib/airbrake/rails/middleware.rb:13:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' 
    railties (3.2.18) lib/rails/rack/logger.rb:32:in `call_app' 
    railties (3.2.18) lib/rails/rack/logger.rb:16:in `block in call' 
    activesupport (3.2.18) lib/active_support/tagged_logging.rb:22:in `tagged' 
    railties (3.2.18) lib/rails/rack/logger.rb:16:in `call' 
    actionpack (3.2.18) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
    rack (1.4.5) lib/rack/methodoverride.rb:21:in `call' 
    rack (1.4.5) lib/rack/runtime.rb:17:in `call' 
    activesupport (3.2.18) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
    rack (1.4.5) lib/rack/lock.rb:15:in `call' 
    rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward' 
    rack-cache (1.2) lib/rack/cache/context.rb:245:in `fetch' 
    rack-cache (1.2) lib/rack/cache/context.rb:185:in `lookup' 
    rack-cache (1.2) lib/rack/cache/context.rb:66:in `call!' 
    rack-cache (1.2) lib/rack/cache/context.rb:51:in `call' 
    airbrake (3.1.16) lib/airbrake/user_informer.rb:16:in `_call' 
    airbrake (3.1.16) lib/airbrake/user_informer.rb:12:in `call' 
    railties (3.2.18) lib/rails/engine.rb:484:in `call' 
    railties (3.2.18) lib/rails/application.rb:231:in `call' 
    railties (3.2.18) lib/rails/railtie/configurable.rb:30:in `method_missing' 
    /usr/lib/ruby/vendor_ruby/phusion_passenger/rack/thread_handler_extension.rb:74:in `process_request' 
    /usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:141:in `accept_and_process_next_request' 
    /usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:109:in `main_loop' 
    /usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler.rb:448:in `block (3 levels) in start_threads'

我沒有捅到/usr/lib/ruby/1.9.1/net/http.rb文件，並就在1435行發現了一個參考.strip：

def initialize_http_header(initheader) 
    @header = {} 
    return unless initheader 
    initheader.each do |key, value| 
    warn "net/http: warning: duplicated HTTP header: #{key}" if key?(key) and $VERBOSE 
    @header[key.downcase] = [value.strip] 
    end 
end

我不知道做什麼用的信息，雖然。

來源

2014-05-17 James Chevalier

什麼是你的HTTP請求的頭？ – bjhaid

你知道我會如何獲得這些信息嗎？也許這是[此代碼（https://github.com/jcasimir/omniauth-mapmyfitness-oauth2/blob/master/lib/omniauth/strategies/ - 請求（user_omniauth_authorize_url）由任一omniauth或omniauth-mapmyfitness-的oauth2產生mapmyfitness.rb）？ –

哦！可能就是這樣！ 'ENV ['MMF_API_KEY']'可能沒有在我最近的服務器移動中繼續！ –

omniauth-mapmyfitness-oauth2有一個奇怪的要求，ENV['MMF_API_KEY']被定義爲圖書館工作。（對我來說很奇怪，無論如何，我很想知道更多關於爲什麼這樣設置的原因。）

這是因爲它在line 13 of its strategy file上使用該環境變量。

我最近遷移了服務器，忘記帶上這個環境變量。基於this answer我添加了兩行到一個新的文件，/etc/profile.d/mapmyfitness.sh，使這個系統範圍內可用：

export MMF_API_KEY=my-key 
export MMF_API_SECRET=my-secret

來源

2014-05-17 15:48:28

診斷髮生在我的代碼外部的NoMethodError

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