问题
I have a Server 2012 R2 box running IIS. I've tried enabling compression for several sites running on that box, but I can't figure out why it won't work. My request headers all show accept-encoding, but the response headers are always Transfer-Encoding:chunked and Vary:Accept-Encoding. The following steps have been performed to try to get gzip compression working:
- Dynamic and Static compression have been enabled on each site and at the machine level
- Both compression methods are installed from Server Manager
- Httpcompression and urlcompression nodes have been manually added to web.configs
- Mime types are defined for compression
- frequentHitThreshold has been set to 1, so all content should be compressed after the first attempt to access it
A trace has been done to see why compression isn't occurring. The only information I have is the code DYNAMIC_COMPRESSION_NOT_SUCCESS with a reason of 1.
Here are the headers:
GET http://redactedservername:8082/ HTTP/1.1
Host: redactedservername:8082
Connection: keep-alive
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36
DNT: 1
Accept-Encoding: gzip, deflate, sdch
Accept-Language: en-US,en;q=0.8
Cookie: ASP.NET_SessionId=gnqovt55ggt22lycufudc0ns
`
HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
Date: Wed, 22 Jun 2016 14:00:57 GMT
Transfer-Encoding: chunked
What other steps can be performed to get compression to work?
回答1:
Compression was working, but ESET Antivirus was doing its job of monitoring web traffic. This modified the response and I didn't get gzip content encoding as expected. Disabling ESET and testing again showed that compression was functioning.
来源：https://stackoverflow.com/questions/37945845/gzip-compression-not-working-with-iis-8-5