Am 03.04.2015 um 03:41 schrieb Andrew Moise:
Hi Richard. Okay, that was exactly my question -- yes, I'm pretty confident that that's what's happening (the page is not completely being served and the transfer is aborted, even though from the user's perspective the page is present and they can interact with it e.g. click off onto another page). I just didn't know that it didn't go into the log in that case; I assumed that it would go in with a count of the bytes that were successfully sent. That leads me to my next question: Assuming that I've understood this correctly, is there any accurate way to see what apache is serving (even partially sent pages)? This is forming a significant part of my traffic (i.e. apache log analysis only shows a fraction of the visitors that google analytics tells me are present). Thanks, Andrew
mod_log_forensic? Regards, Rainer
On Thu, Apr 2, 2015 at 8:29 PM, Richard <lists-apache@xxxxxxxxxxxxxxxxxxxxx> wrote:If the log entry for the image has a "referer" for a site page, then it is unlikely that the image is being served from another page/site (unless there is referer-based access control and someone *really* wants the image(s), so is mucking the referer). Apache doesn't write the log entry until the page has been delivered (otherwise it wouldn't be able to give you the number of bytes served). If your page(s) have something that keeps them from being fully served (js, and ad, etc.) then the user may click off the page before everything closes out and the entry is logged. I.e., this wouldn't require the user to explicitly abort the page delivery, they may just be doing it implicitly if the page has delivery issues. You should be able to check this fairly easily yourself. ------------ Original Message ------------Date: Thursday, April 02, 2015 20:00:00 -0400 From: 5k Kate <5k.kate.1114@xxxxxxxxx> Is it possible that the image links are being shared separately from the page? Theoretically someone could go and post your image into another page. -Kate On Wed, Apr 1, 2015 at 1:09 PM, Andrew Moise <andrew.moise@xxxxxxxxx> wrote:Hello all. I'm trying to analyze the behavior of visitors to my web site by parsing my Apache access log, and it seems that the log is missing some entries. For example, it's happened before that there's an entry in the log for serving an image, with a referrer set to one of my HTML pages, but there is no entry in the log for that HTML page (either before or after the entry for the image loading) from any similar IP address. I don't think that the headers I'm emitting would cause the browser to cache that particular HTML page. Furthermore (and more to the point of why I'm concerned about this), parsing the apache log indicates a small fraction (maybe 25%) of the number of visitors indicated by a third party logging tool (in this case clicky.com). Is there anything that could cause this? For example, does apache not put an entry in the log if the connection is interrupted before the entire HTML file is emitted? Thanks in advance for your help. -Andrew
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