我使用ASP.NET Identity以格式生成激活网址
https://example.com/activate/token
其中令牌由Asp Identity生成，看起来像这样
Cl%2bsBAAAA2qxQHU9GHUuBNXILrSEDWgAAAAACAAAAAAAQZgAAAAEAACAAAADds1gNf52iBX54Z6V%2bY5ZJEZmCmhgPetK2mEuu5pEiLwAAAAAOgAAAAAIAACAAAADjqFZ3Qrk6o22AHQDtoo%2bUNO4NZZ9RubxnuFBPTwyX/3AAAAATHRJIHkbDX2PmNxDYV0e2P5uAohDpMlpaP1C/KjV1mz5z06X7YaehipzlgLa4IxcAT8AQK%2bW4Qxq4Y3No0kaVNQRpSIzdB6cv%2bjn47IY5hburRgSPbZ6L7xvmWoreBZCCBn4SHMxbcdfAKEnkDELpQAAAAIwoV4hLdqQyV5g6WAQM/kiO3/FKyauZKsWBI/tA/M7uq7CDiQRdZxqdO0SUO9xW851luaKDP6bi/daxEhAemzk%3d
问题有时是~10次我得到通用400错误
Bad Request - Invalid URL
HTTP Error 400. The request URL is invalid.
错误链接示例
http://example.org/activate/AQAAANCMnd8BFdERjHoAwE/Cl%2bsBAAAA2qxQHU9GHUuBNXILrSEDWgAAAAACAAAAAAAQZgAAAAEAACAAAACrbeGsadAFQETqBTsIuxf%2bJZqK0JOQvGC6M250gHsTEQAAAAAOgAAAAAIAACAAAACo6YtEGtjrvRO74X2G2VAQ1pAlBWksjnLo0zGxwrVrSXAAAAA%2bFfiwK3sL%2bbzK9wbM0r7Hoy4tueNmh4CNLD%2b2HeP7IldrAq40XbeLW0zlZo3CC2qWBfaGb5Z4HjziVYVT2Fvpg6dtm9UAmI4h5BPjzIBcJo8ZpiE4Z%2bQedRpAijhMHfsV2IDNptzCREWe3Wefi9aoQAAAAPzg9TNEhsqf76Qir%2bIyMxuuPsQkVykZVYFJ9/aI3EAAWK2de2VTUsXQBgdS4OGSI4AaAUEN%2b0Akdohw3Jd8zFo%3d
我认为问题出在IIS请求的某个地方并没有在任何地方点击我的应用程序，这很奇怪，同样的错误在microsoft.com等其他网站上显示。
例如，这会导致400错误
https://microsoft.com/en-us/AQAAANCMnd8BFdERjHoAwE/Cl%2bsBAAAA2qxQHU9GHUuBNXILrSEDWgAAAAACAAAAAAAQZgAAAAEAACAAAACrbeGsadAFQETqBTsIuxf%2bJZqK0JOQvGC6M250gHsTEQAAAAAOgAAAAAIAACAAAACo6YtEGtjrvRO74X2G2VAQ1pAlBWksjnLo0zGxwrVrSXAAAAA%2bFfiwK3sL%2bbzK9wbM0r7Hoy4tueNmh4CNLD%2b2HeP7IldrAq40XbeLW0zlZo3CC2qWBfaGb5Z4HjziVYVT2Fvpg6dtm9UAmI4h5Bhsqf76Qir%2bIyMxuuPsQkVykZVYFJ9/aI3EAAWK2de2VTUsXQBgdS4OGSI4AaAUEN%2b0Akdohw3Jd8zFo%3d
但是这404错误
https://www.microsoft.com/en-us/AQAAANCMnd8BFdERjHoAwE/Cl%2bsBAAAA2qxQHU9GHUuBNXILrSEDWgAAAAACAAAAAAAQZgAAAAEAACAAAAAbr0DBVHVcY2tO3Rvvk15d5%2bIuV3usPJmD2FTF15vpbwAAAAAOgAAAAAIAACAAAAAXddKnTogsgCGRRhIzbXbk14fsjcLJ5L0q5C/dRfsYlHAAAAAlAw9iARuxhShyGfzE6ZF193fX7zvxLnOfjgh74G5oLc5RPIVdQ7O8sJdj5H0BnysPxrCMk965izZRqjBKGZFNl6smYdmaGy5aPqxI1kTez%2bhHQH1GMW3GUmF%2bRoYdRqcmJLErgcb4sgMa7UGA16X1QAAAAJTk6s6OzBuA2B8whkUdwQnrCS2xgf7QR%2blA%2bm7UqUdXuhQfiFkL/oCINhyrJt%2bWJsjxvGhOcsW15DtzyqKvlWY%3d
看起来长度有时有意义但不是真的吗？ 类似的问题，但由已知字符引起 - %09 in a URL causes IIS (HTTP.SYS?) to return HTTP 400 immediately
PS。格式为http://example.com/activate?token=token的网址正常
答案 0 :(得分：1)
我认为它是由Url段的最大长度（UrlSegmentMaxLength）引起的。
来源：https://support.microsoft.com/it-it/help/820129/http-sys-registry-settings-for-windows