Apache httpd 2.4反向代理不压缩

Question

使用Apache httpd 2.2,可以设置反向代理并使用mod_deflate压缩代理内容,以表达Accept-Encoding: gzip标题.

此配置足以使其工作:

    LoadModule deflate_module modules/mod_deflate.so
    LoadModule filter_module modules/mod_filter.so
    SetOutputFilter DEFLATE

    LoadModule proxy_module modules/mod_proxy.so
    LoadModule proxy_http_module modules/mod_proxy_http.so
    ProxyRequests Off
    ProxyPass        /tomcat http://localhost:8880/
    ProxyPassReverse /tomcat http://localhost:8880/
    ProxyPass        /other  http://localhost:8001/
    ProxyPassReverse /other  http://localhost:8001/

现在升级到2.4(Windows上为2.4.29)后,接受相同的配置,它确实压缩了DocumentRoot提供的静态内容.但是,当通过ProxyPass检索时,相同的内容将以未压缩的形式返回.

我知道我可以配置Tomcat来进行压缩,但是还有另一个服务器忽略了Accept-Encoding头.

如何设置反向代理,并压缩代理内容？

编辑:

以下是返回的标头,证明代理内容未被2.4服务器压缩:

----- Retrieving uncompressed from DocumentRoot ---------------------------------

C:\Temp>curl -I http://localhost/test.txt 
HTTP/1.1 200 OK
Date: Tue, 09 Jan 2018 17:11:59 GMT
Server: Apache/2.4.29 (Win64) OpenSSL/1.1.0g
Last-Modified: Fri, 05 Jan 2018 12:58:40 GMT
ETag: "75441-5620701eb471c"
Accept-Ranges: bytes
Content-Length: 480321
Vary: Accept-Encoding
Content-Type: text/plain

----- The same from Tomcat ------------------------------------------------------

C:\Temp>curl -I http://localhost:8880/rr/test.txt 
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Accept-Ranges: bytes
ETag: W/"480321-1515157120042"
Last-Modified: Fri, 05 Jan 2018 12:58:40 GMT
Content-Type: text/plain
Content-Length: 480321
Date: Tue, 09 Jan 2018 17:11:59 GMT

----- 2.4.29: Retrieving compressed from DocumentRoot ---------------------------

C:\Temp>curl -I -H "Accept-Encoding: gzip" http://localhost/test.txt 
HTTP/1.1 200 OK
Date: Tue, 09 Jan 2018 17:11:59 GMT
Server: Apache/2.4.29 (Win64) OpenSSL/1.1.0g
Last-Modified: Fri, 05 Jan 2018 12:58:40 GMT
ETag: "75441-5620701eb471c-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 48265
Content-Type: text/plain

----- 2.4.29: Not getting any compression for proxied Tomcat content ------------

C:\Temp>curl -I -H "Accept-Encoding: gzip" http://localhost/tomcat/rr/test.txt 
HTTP/1.1 200 OK
Date: Tue, 09 Jan 2018 17:11:59 GMT
Server: Apache-Coyote/1.1
Accept-Ranges: bytes
ETag: W/"480321-1515157120042"
Last-Modified: Fri, 05 Jan 2018 12:58:40 GMT
Content-Type: text/plain
Content-Length: 480321

----- 2.2.14: Retrieving compressed from DocumentRoot ---------------------------

C:\Temp>curl -I -H "Accept-Encoding: gzip" http://localhost:81/test.txt 
HTTP/1.1 200 OK
Date: Tue, 09 Jan 2018 17:11:59 GMT
Server: Apache/2.2.14 (Win32)
Last-Modified: Fri, 05 Jan 2018 12:58:40 GMT
ETag: "90000000e7463-75441-5620701eb471c"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 48265
Content-Type: text/plain

----- 2.2.14: Proxied Tomcat content comes compressed ---------------------------

C:\Temp>curl -I -H "Accept-Encoding: gzip" http://localhost:81/tomcat/rr/test.txt 
HTTP/1.1 200 OK
Date: Tue, 09 Jan 2018 17:11:59 GMT
Server: Apache-Coyote/1.1
Accept-Ranges: bytes
ETag: W/"480321-1515157120042"
Last-Modified: Fri, 05 Jan 2018 12:58:40 GMT
Content-Type: text/plain
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 20

所有这些都是在从ApacheHaus下载的普通2.4.29安装上测试的.上面的配置已添加到httpd.conf中,没有其他任何更改.这同样适用于2.2.14安装(2009年从Apache下载),但另一个更改为端口81.

Answer 1

我\xe2\x80\x99已经成功地重现了curl你apache/tomcat所描述的行为

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这就是我复制它的方式（OS X El Capitan）：

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雄猫：

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docker run -it --rm -p 8880:8080 tomcat:6.0\n

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阿帕奇

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httpd -v\n\nServer version: Apache/2.4.18 (Unix)\nServer built:   Feb 20 2016 20:03:19\n\nhttpd -l\nCompiled in modules:\n  core.c\n  mod_so.c\n  http_core.c\n  prefork.c\n

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Apache 配置（完整）：

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Listen 80                                                                       \n\nLoadModule authz_user_module libexec/apache2/mod_authz_user.so                  \nLoadModule authz_core_module libexec/apache2/mod_authz_core.so                  \nLoadModule access_compat_module libexec/apache2/mod_access_compat.so            \nLoadModule filter_module libexec/apache2/mod_filter.so                          \nLoadModule deflate_module libexec/apache2/mod_deflate.so                        \nLoadModule mime_module libexec/apache2/mod_mime.so                              \nLoadModule log_config_module libexec/apache2/mod_log_config.so                  \nLoadModule headers_module libexec/apache2/mod_headers.so                        \nLoadModule version_module libexec/apache2/mod_version.so                        \nLoadModule proxy_module libexec/apache2/mod_proxy.so                            \nLoadModule proxy_http_module libexec/apache2/mod_proxy_http.so                  \nLoadModule unixd_module libexec/apache2/mod_unixd.so                            \n\n<IfModule unixd_module>                                                         \nUser _www                                                                       \nGroup _www                                                                      \n\n</IfModule>                                                                     \n\n<IfModule mime_module>                                                          \n    TypesConfig /private/etc/apache2/mime.types                                 \n</IfModule>                                                                     \n\nLogLevel debug                                                                  \n\n<IfModule log_config_module>                                                    \n    LogFormat "%h %l %u %t \\"%r\\" %>s %b \\"%{Referer}i\\" \\"%{User-Agent}i\\"" combined\n    LogFormat "%h %l %u %t \\"%r\\" %>s %b" common                                \n\n    <IfModule logio_module>                                                     \n      # You need to enable mod_logio.c to use %I and %O                         \n      LogFormat "%h %l %u %t \\"%r\\" %>s %b \\"%{Referer}i\\" \\"%{User-Agent}i\\" %I %O" combinedio\n    </IfModule>                                                                 \n    CustomLog "/private/var/log/apache2/access_log" common                      \n</IfModule>                                                                     \n\nErrorLog "/private/var/log/apache2/error_log"                                   \nTraceEnable off                                                                 \n\nSetOutputFilter  DEFLATE                                                        \n\nProxyRequests    Off                                                            \nProxyPass        /tomcat http://localhost:8880/                                 \nProxyPassReverse /tomcat http://localhost:8880/                                 \nProxyPass        /other  http://localhost:8001/                                 \nProxyPassReverse /other  http://localhost:8001/                                 \nDocumentRoot    /Library/WebServer/Documents \n

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检查

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curl -I -H \'Accept-Encoding: gzip\'  \'http://localhost/tomcat\' \nHTTP/1.1 200 OK\nDate: Sat, 13 Jan 2018 13:35:14 GMT\nServer: Apache-Coyote/1.1\nAccept-Ranges: bytes\nETag: W/"7454-1491118183000"\nLast-Modified: Sun, 02 Apr 2017 07:29:43 GMT\nContent-Type: text/html\nContent-Length: 7454\n\ncurl -I -H \'Accept-Encoding: gzip\'  \'http://localhost/index.html.en\' \nHTTP/1.1 200 OK\nDate: Sat, 13 Jan 2018 13:35:25 GMT\nServer: Apache/2.4.18 (Unix)\nLast-Modified: Tue, 09 Jan 2018 04:51:20 GMT\nETag: "45-56250aa712200-gzip"\nAccept-Ranges: bytes\nVary: Accept-Encoding\nContent-Encoding: gzip\nContent-Length: 65\nContent-Type: text/html\n

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如您所见，输出与您的示例非常匹配

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这里\xe2\x80\x99s是有趣的部分

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如果我使用常规GET请求而不是HEAD（通过浏览器或curl不使用-I） tomcat\xe2\x80\x99s 响应确实会被压缩

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curl -D - -H \'Accept-Encoding: gzip\'  \'http://localhost/tomcat\' 2>/dev/null | strings\nHTTP/1.1 200 OK\nDate: Sat, 13 Jan 2018 13:37:19 GMT\nServer: Apache-Coyote/1.1\nAccept-Ranges: bytes\nETag: W/"7454-1491118183000-gzip"\nLast-Modified: Sun, 02 Apr 2017 07:29:43 GMT\nContent-Type: text/html\nVary: Accept-Encoding\nContent-Encoding: gzip\nContent-Length: 2526\n(some junk)\n

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不知道为什么它\xe2\x80\x99s 发生，看起来像 Apache\xe2\x80\x99s + mod_proxy/defate HEAD请求上的错误行为。\n如果你说它在 Apache 2.2 中没问题，我猜可能是与此调整有一定关系

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mod_deflate will now skip compression if it knows that the size overhead added by the compression is larger than the data to be compressed.\n

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因此，我\xe2\x80\x99d 检查您的情况下GET请求的问题是否仍然存在。\n如果是 - 提供有关您的设置的更多详细信息，以便您的环境可以 100% 复制 - 用于 apache 和 tomcat 的有效 Dockerfile，以隔离可能的环境差异会很好

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