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在我的網頁中，我向WCF服務發出Ajax請求。如果該服務拋出一個錯誤，那麼它將返回到JSON中。 JavaScript錯誤處理程序然後顯示一個隱藏的div，其中包含預填充了我的詳細信息的mailto URL，以便團隊成員（這是一個小型的內部應用程序）可以向我發送包括堆棧跟蹤在內的錯誤。這裏是一個測試運行結果URL的例子：mailto網址的最大實際長度是多少？
mailto:[email protected]?subject=potential%20seed%20save%20failed&body=Potential%20seed%20URL%20=%20unknown%0DResponse%20%3A%20%7B%22ExceptionDetail%22%3A%7B%22HelpLink%22%3Anull%2C%22InnerException%22%3Anull%2C%22Message%22%3A%22testing%22%2C%22StackTrace%22%3A%22%20%20%20at%20SavePotentialSeedSearches.WCFService.StorePotentialSeed(String%20url%2C%20String%20name)%20in%20C%3A%5C%5CTFS%5C%5CProjects%5C%5CSeeds%5C%5CPreliminaries%5C%5CSavePotentialSeedSearches%5C%5CWCFService.svc.cs%3Aline%2021%5Cu000d%5Cu000a%20%20%20at%20SyncInvokeStorePotentialSeed(Object%20%2C%20Object%5B%5D%20%2C%20Object%5B%5D%20)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object%20instance%2C%20Object%5B%5D%20inputs%2C%20Object%5B%5D%26%20outputs)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc%26%20rpc)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc%26%20rpc)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc%26%20rpc)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean%20isOperationContextSet)%22%2C%22Type%22%3A%22System.ArgumentException%22%7D%2C%22ExceptionType%22%3A%22System.ArgumentException%22%2C%22Message%22%3A%22testing%22%2C%22StackTrace%22%3A%22%20%20%20at%20SavePotentialSeedSearches.WCFService.StorePotentialSeed(String%20url%2C%20String%20name)%20in%20C%3A%5C%5CTFS%5C%5CProjects%5C%5CSeeds%5C%5CPreliminaries%5C%5CSavePotentialSeedSearches%5C%5CWCFService.svc.cs%3Aline%2021%5Cu000d%5Cu000a%20%20%20at%20SyncInvokeStorePotentialSeed(Object%20%2C%20Object%5B%5D%20%2C%20Object%5B%5D%20)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object%20instance%2C%20Object%5B%5D%20inputs%2C%20Object%5B%5D%26%20outputs)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc%26%20rpc)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc%26%20rpc)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc%26%20rpc)%5Cu000d%5Cu000a%20%20%20at%20System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean%20isOperationContextSet)%22%7D
這是2354個字符長。
Other answers表明2000個字符以上的URL是一個壞主意，因爲一些瀏覽器可能會與他們鬥爭。但是，瀏覽器以任何方式解析mailto URL，還是立即將它們交給默認郵件工具？如果他們被交易，是否有人有關於各種郵件工具（特別是Outlook）可以處理的mailto URL長度的數據？
檢查這個http://forums.asp.net/t/1413986.aspx/1 –
這是一個有趣的鏈接 - 命令行限制是我沒有考慮過的事情（雖然後XP它們被給予8191）。 – dumbledad