问题
I created a file name called "%20%20.txt" and uploaded in my webs space.
When I am trying to access above file through URL by typing "http://mysite/%20%20.txt", it is showing an error that the file is not found. I know that "%20" will be decoded as a blank space.
How is it possible to access the file through URL?
回答1:
The %20 that you use in the URL will be decoded, so you are looking for the file " .txt", but the %20 that you used to create the file is not decoded, so the actual name of the file is "%20%20.txt".
You need to use the URL http://mysite/%2520%2520.txt to access the file "%20%20.txt". The %25 is the encoded form of %.
回答2:
Use %2520%2520.txt, %25 decodes as the percent-sign %. You can use the table on http://www.asciitable.com/. The number after the percent-sign is a hexadecimal representation of the ASCII value.
If you have a long string, you could also use Javascript's encodeURIComponent function:
prompt("Encoded:", encodeURIComponent("%20%20.txt"))
This could be executed in the Javascript console (Ctrl + Shift + J in Firefox) and displays a dialog containing the escape value.
回答3:
If your file name really is %20%20.txt, try http://yoursite.com/%2520%2520.txt.
%25 is the percentage encoded.
回答4:
You need to escape those percent signs:
http://mysite/%2520%2520.txt
来源：https://stackoverflow.com/questions/11070499/how-to-access-a-file-name-containing-url-encoding-through-the-browser