On May 18, 2005, at 4:10 PM, Jared Williams wrote:
Sure the server is checking if modified since headers?
I'm capturing the response headers from the remote server, so I can see that.
Just tried a bit of code here and it seems to be working as expected (5.0.4 Win32)
1) I made an initial mistake by running my PHP script(s) from the command line and not from a server.
2) but now when running my PHP script(s) from a server I see that:
file_get_contents() with a conditional get in a stream context works as expected; that is, the remote server returns a 304 not modified HTTP response header only. (if doing this with file_get_contents(), then the libxml_set_streams_context() function call is of course irrelevant).
DOMDocument::load() with a conditional get in a stream context set via libxml_set_streams_context() shows odd results; that is, the remote server returns a 304 not modified in the HTTP response header, but also returns the file contents as well (!!??).
That's a bit baffling -- a server shouldn't do that, since the 304 response header ends with "connection: close", so I don't know how or why the file contents are being captured too. I would think a 304 response header means that the request header was properly interpreted and nothing but a header would be returned. Hard to know if the problem is on my end or on the remote server side. I note also that stream contexts send only as HTTP/1.0, and the remote server is returning HTTP/1.1, and I just don't know if that's a possible factor in this or not.
Anyhow, I have a workable solution which is sort of ok -- use file_get_contents() with a conditional get in a stream context to fetch a remote file on an "if-modified-since" basis, then stuff the string result into a new DOMDocument() object and have at it that way.
But of course I'm puzzled as to why libxml_set_streams_context() is doing what it's doing, and it would be nice to know how to get it to work if it can and should work elsewhere for others.
Thanks for a helpful reply.
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