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It seems that the standard is that the Content-Disposition header name should be capitalized.

https://www.rfc-editor.org/rfc/rfc6266

But I remember that there is some website that does not respect this and use lower case content-disposition. Chrome does not have problems of understanding the lower case header. But wget does not recognize it.

Do I misunderstand the standard? Or the header must be in upper cases? Thanks.

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user1424739
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    HTTP header **names** are case-insensitive. HTTP header **values** may or may not be case-sensitive. – Dai Sep 11 '19 at 23:14
  • Possible duplicate of [Are HTTP headers case-sensitive?](https://stackoverflow.com/questions/5258977/are-http-headers-case-sensitive) – Ivar Sep 11 '19 at 23:18

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