On Wed, 29 Mar 2017 10:40:13 -0500, Paul Gilmartin wrote:
>On Wed, 29 Mar 2017 10:04:37 -0400, John Eells wrote:
>
>>> ... The book has been updated but not the link
>>> to the new level of it. Here is the new level of the book:
>>> http://publibz.boulder.ibm.com/epubs/pdf/e0z3f113.pdf
>>
>>Talking with the person responsible for the book and the link, we found
>>there is a bug in my browser [and R.S.'s?]. It's supposed to compare
>>the page on the web to the cached one and refresh it if they differ ...
>
>Or does it compare a checksum?
>
Looking at the headers:
568 $ curl -D/dev/fd/3 http://publibz.boulder.ibm.com/epubs/pdf/e0z3f113.pdf
3>&1 1>/dev/null 2>&1
HTTP/1.1 200 OK
Date: Wed, 29 Mar 2017 16:08:34 GMT
Last-Modified: Thu, 09 Mar 2017 19:39:09 GMT
ETag: "8cdf2-63c3e-54a516614d140"
Accept-Ranges: bytes
Content-Length: 408638
Connection: close
Content-Type: application/pdf
... The "Etag:" is supposed to take care of that:
https://en.wikipedia.org/wiki/HTTP_ETag
>SR for the browser?
>
(But would it confess the cached Etag:?)
-- gil
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