The requested URI is invalid for this FTP command when filename contains #

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I'm receiving "The requested URI is invalid for this FTP command" error when attempting to upload any file that contains a "#" in the filename. All other files upload without any issues. If I remove the #, the files upload fine, but this isn't an option as it's required for numerous clients.

What I have tried:

I've checked the full URI & it's correct...

ftp://path-to-server/folder/#1.jpg

I've tested uploading the files using Windows FTP & Filezilla without any problems. For some reason, that I can't figure out, FTPWebRequest doesn't like # in the filenames.

Posted 2-Apr-18 14:14pm

Shane_Beggs

Updated 3-Apr-18 17:59pm

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Peter_in_2780 3-Apr-18 0:12am

Can you try encoding the # as # ? Something is probably treating it as an HTML tag reference or as a (broken) URL encoding.
(grrr took me 3 goes to get this encoded right!)

Shane_Beggs 3-Apr-18 9:45am

Thanks heaps! I ended up using WebUtlity.UrlEncode(ftp://path-to-server/folder/#1.jpg) which works a treat!

Peter_in_2780 3-Apr-18 23:52pm

Great! I'll turn my comment into an answer. Then the question will show as answered, for others to reference.

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Peter_in_2780 · Accepted Answer · 2018-04-03T18:01:00

Solution 1

Since you are using a web request, the filename is being treated as a URL. The character # is a special character in URLs, and needs to be encoded, such as # Other special characters will need similar encoding.

Posted 3-Apr-18 18:01pm

Peter_in_2780