# 4523 Web Server Not Handling Certain Unicode Characters Properly when Decoding/Encoding as URL Values

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One of our customer has files containing "Left Double Quotation Marks" in the filename like this:

 - FA._Montage_Ausgleichsstreifen_(farbig)_ 2.5“_HDD_320GB_V1.pdf

These files, when requestet from a link, result in a "HTTP 404 recource not found". The Left Double Quotation Mark mapped in Unicode is decimal 8220.

My short filename example is

 2.5“HDD.txt

URL-encode this:

 2.5%E2%80%9CHDD.txt

Decoding it back (with a programm or an online URL decoder/encoder service) results in the origin filename.

When requesting the (URL encoded) link with Firefox from the running IDE, I can read

 Resource /2.5â not found

in the body text of the response. The character â (hex 0xE2) here is different from “ (hex 0x93).