Check if a server supports "regetting"

My line at work these days are way to unstable after they changed the server I am going through. So my crawler hurls out meters of error codes when trying to download files. So I am thinking about trying to use the wget function in stead. At least where I can. But can I from command line, or code querry a server to check if it supports regetting? So I can test it on the fly.



Thanks
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OK, I just found out this:

Quote:

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Note that regetting only works with FTP servers and with HTTP servers that support the "Range" header.

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Does that mean that the MIME type or something can give me the answer? The same way as I can querry the server if it supports "length" and "file fype"?



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