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说服Firefox通过HTTPS发送If-Modified-Since标头

2023-04-12 12:55:00

Convince Firefox to send an If-Modified-Since header over HTTPS

我该如何说服Firefox(如果有关系的话为3.0.1)在HTTPS请求中发送If-Modified-Since标头？如果请求使用纯HTTP，并且我的服务器忠实地接受它，它将发送标头。但是，当我改为使用HTTPS从同一服务器请求同一资源时(即只是将URL中的http：//更改为https：//)，那么Firefox根本不会发送If-Modified-Since标头。这种行为是SSL规范强制规定的吗？

这是一些使用Live HTTP Headers Firefox扩展提取的HTTP和HTTPS请求/响应对示例，其中粗体字有些不同：

HTTP请求/响应：

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http://myserver.com:30000/scripts/site.js

GET /scripts/site.js HTTP/1.1
Host: myserver.com:30000
User-Agent: Mozilla/5.0 (...) Gecko/2008070206 Firefox/3.0.1
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, 19 Aug 2008 15:57:30 GMT
If-None-Match:"a0501d1-300a-454d22526ae80"-gzip
Cache-Control: max-age=0

HTTP/1.x 304 Not Modified
Date: Tue, 19 Aug 2008 15:59:23 GMT
Server: Apache/2.2.8 (Unix) mod_ssl/2.2.8 OpenSSL/0.9.8
Connection: Keep-Alive
Keep-Alive: timeout=5, max=99
Etag:"a0501d1-300a-454d22526ae80"-gzip

HTTPS请求/响应：

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https://myserver.com:30001/scripts/site.js

GET /scripts/site.js HTTP/1.1
Host: myserver.com:30001
User-Agent: Mozilla/5.0 (...) Gecko/2008070206 Firefox/3.0.1
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

HTTP/1.x 200 OK
Date: Tue, 19 Aug 2008 16:00:14 GMT
Server: Apache/2.2.8 (Unix) mod_ssl/2.2.8 OpenSSL/0.9.8
Last-Modified: Tue, 19 Aug 2008 15:57:30 GMT
Etag:"a0501d1-300a-454d22526ae80"-gzip
Accept-Ranges: bytes
Content-Encoding: gzip
Content-Length: 3766
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/javascript

更新：将browser.cache.disk_cache_ssl设置为true可以解决问题(这很奇怪，因为正如Nickolay指出的那样，仍然存在内存缓存)。向响应添加" Cache-control：public"标头也可以。谢谢！