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2010-02-20 23:19
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capture2.png (131,757 bytes) |
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clear your browser cache |
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After I cleared my browser cache, the problem was resolved. This issue was probably because the html (recent) code used code from the javascript file (old from cache). Even if cleaning my cache resolved the problem, this is not the best solution, because I think AniDb is updated quite often. I did a little search on html cache and found that there could be a solution : using "Cache-Control: must-revalidate" in http header. Source : http://www.webscalingblog.com/performance/caching-http-headers-last-modified-and-etag.html I checked with my sniffer, when first requesting the page, the html document is sent, the script tag are requested \t\t<script src="http://static.anidb.net/js/anidbscript.js" type="text/javascript"></script>\n \t\t<script src="http://static.anidb.net/js/ajax.js" type="text/javascript"></script>\n the server send there script with their Last-Modified: and ETag: value. the http header of these script does not contains a cache-control value so the browser must choose what to do. In my case, the browser used the local cached files instead of re-downloading them from the web server. By adding Cache-Control: must-revalidate to the http header of files like script,css, when the browser receive a new html page containing these script tag, it will ask the server if the file changed by providing a date and time and/or a unique value defining the file. The server check if the file changed from these value. If the file was not modified, it send back to the browser file not modified, else, will send the new file. This way, at each new request, both of these script would be checked for new version. This cause a lot more network traffic on AniDB server and may increase the network bill but would future issue about cleaning your cache. |
- Anonymous
