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PODoes WebKit Cache 3rd Party Resources?
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  1. PODoes WebKit Cache 3rd Party Resources?
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    copied!<p>In Chrome and Safari a remote image included on my site never seems to get requested with caching-friendly headers (If-Modified-Since, etc) despite the server returning the appropriate information. Local resources, on the other hand, are requested with these headers. In contrast Firefox requests the remote resources with caching-friendly headers.</p> <p>This is for images on S3 though I don't think it's unique to S3...</p> <p><strong>Update:</strong> Here's the actual request I'm seeing via Chrome Resources panel.</p> <pre><code>Request URL:http://mobtest.s3.amazonaws.com/4MKHZL-114.png Request Method:GET Status Code:200 OK </code></pre> <p><em>Request Headers</em></p> <pre><code>Accept:application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5 Cache-Control:max-age=0 Referer:http://mobtest.s3.amazonaws.com/4MKHZL-114.png User-Agent:Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.86 Safari/533.4 </code></pre> <p><em>Response Headers</em></p> <pre><code>Cache-Control:public, max-age=86400 Content-Length:4074 Content-Type:image/png Date:Wed, 30 Jun 2010 12:15:42 GMT ETag:"7e4739d5527ada6bb327f1e27ee656ef" Last-Modified:Tue, 29 Jun 2010 13:40:08 GMT Server:AmazonS3 x-amz-id-2:MKTS28Zu4zTsWFjXUTzvmRY214TO9LTKTxtgW1psWKa/JY2pnwmO9rxs8fyHd/O/ x-amz-request-id:F6047ADD0FD6D885 x-amz-version-id:O2OTsDbU4uKOwze7rbK_Do39U_Xhpnyp </code></pre> <p>Repeating the request doesn't lead to any additional headers being sent by Chrome (and as mentioned before, Safari). In contrast, quickly refreshing in Firefox gives me the following:</p> <pre><code>Status: 304 Not Modified </code></pre> <p><em>Response Headers</em></p> <pre><code>x-amz-id-2 IbhwfAP7FhIN7jtn2FrsjOkVZ8sIKJjv5llevKgw04y2xM+29GSFdGyQNXjiBaMY x-amz-request-id 258F30A4CC2AC870 Date Wed, 30 Jun 2010 12:19:55 GMT Cache-Control public, max-age=86400 Last-Modified Tue, 29 Jun 2010 13:40:08 GMT x-amz-version-id O2OTsDbU4uKOwze7rbK_Do39U_Xhpnyp Etag "7e4739d5527ada6bb327f1e27ee656ef" Content-Type image/png Content-Length 4074 Server AmazonS3 </code></pre> <p><em>Request Headers</em></p> <pre><code>Host mobtest.s3.amazonaws.com User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 300 Connection keep-alive If-Modified-Since Tue, 29 Jun 2010 13:40:08 GMT If-None-Match "7e4739d5527ada6bb327f1e27ee656ef" Cache-Control max-age=0 </code></pre> <p><strong>Update 2:</strong> And now I see Chrome caching the content. Strange... I'm going to close this question and give Marc the answer.</p>
 

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