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Apache 重写规则前缀 DocumentRoot

tag-icon • tag-icon apache-2.4 mod-rewrite
Apache 重写规则前缀 DocumentRoot

我有以下 VirtualHost 配置：

<VirtualHost *:80>
    DocumentRoot /srv/emptywebroot
    <Directory /srv/emptywebroot>
        Require all denied
    </Directory>

    # Dashboard proxy
    RewriteEngine on
    LogLevel alert rewrite:trace6
    RewriteCond %{HTTP:Upgrade} =websocket
    RewriteRule /dashboard/(.*) ws://dashboard:3838/dashboard/$1 [P,L]
    RewriteCond %{HTTP:Upgrade} !=websocket
    RewriteRule /dashboard/(.*) http://dashboard:3838/dashboard/$1 [P,L]
    ProxyPreserveHost on
    ProxyPassReverse /dashboard http://dashboard:3838/dashboard
</VirtualHost>

当我访问时，http://myurl/dashboard我从仪表板后端收到 404。

当我检查重写日志时，我得到：

[Wed Mar 21 14:04:08.051070 2018] [rewrite:trace2] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] init rewrite engine with requested uri /dashboard/
[Wed Mar 21 14:04:08.051114 2018] [rewrite:trace1] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] pass through /dashboard/
[Wed Mar 21 14:04:08.051176 2018] [rewrite:trace3] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] add path info postfix: /srv/emptywebroot/dashboard -> /srv/emptywebroot/dashboard/
[Wed Mar 21 14:04:08.051186 2018] [rewrite:trace3] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] applying pattern '(.*)' to uri '/srv/emptywebroot/dashboard/'
[Wed Mar 21 14:04:08.051199 2018] [rewrite:trace4] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] RewriteCond: input='' pattern='=websocket' => not-matched
[Wed Mar 21 14:04:08.051208 2018] [rewrite:trace3] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] add path info postfix: /srv/emptywebroot/dashboard -> /srv/emptywebroot/dashboard/
[Wed Mar 21 14:04:08.051216 2018] [rewrite:trace3] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] applying pattern '(.*)' to uri '/srv/emptywebroot/dashboard/'
[Wed Mar 21 14:04:08.051225 2018] [rewrite:trace4] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] RewriteCond: input='' pattern='!=websocket' => matched
[Wed Mar 21 14:04:08.051234 2018] [rewrite:trace2] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] rewrite '/srv/emptywebroot/dashboard/' -> 'http://dashboard:3838//srv/emptywebroot/dashboard/'
[Wed Mar 21 14:04:08.051243 2018] [rewrite:trace2] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] escaped URI in per-dir context for proxy, http://dashboard:3838//srv/emptywebroot/dashboard/ -> http://dashboard:3838//srv/emptywebroot/dashboard/
[Wed Mar 21 14:04:08.051264 2018] [rewrite:trace2] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] forcing proxy-throughput with http://dashboard:3838//srv/emptywebroot/dashboard/
[Wed Mar 21 14:04:08.051272 2018] [rewrite:trace1] [pid 1548:tid 140453800191744] mod_rewrite.c(476): [client 10.174.120.65:59506] 10.174.120.65 - - [idisrv.sivsa.com/sid#7fbdfdd1ed20][rid#7fbdf018f0a0/initial] [perdir /dashboard/] go-ahead with proxy request proxy:http://dashboard:3838//srv/emptywebroot/dashboard/ [OK]

因此/srv/emptywebroot在将 URI 传递给代理之前会添加前缀。我希望不添加前缀。我尝试过RewriteBase /其他一些方法，但我不明白这一点。

在这种情况下，如何避免将 DocumentRoot 作为 URI 的前缀？

编辑1：位于仪表盘：3838 的仪表盘后端不是由 apache 提供的，它是一个 shiny 服务器（https://shiny.rstudio.com/）。我在仪表盘的主机上运行了一个 tcpdump，发生的事情如上所示：DocumentRoot 被 apache 的代理虚拟主机作为前缀，因此后端被要求http://仪表板:3838//srv/emptywebroot/仪表板， 代替http://仪表板:3838/仪表板正如我所需要的。我希望这能澄清我的情况，因此重新表述问题：我如何指示 mod_rewrite 不解析本地路径（以 DocumentRoot 为前缀）？在我的情况下，这是一个 mod_rewrite 代理（检查重写规则中的 [P]，因此以本地路径为前缀不是我想要的行为。

答案1

根据重写日志，你的规则集的这些行已被命中

RewriteCond %{HTTP:Upgrade} !=websocket
RewriteRule /dashboard/(.*) http://dashboard:3838/dashboard/$1 [P,L]

由于RewriteRule有[L]标志，因此将不再检查下一行

现在，此请求将进入下一轮重写，<VirtualHost dashboard:3838> 您可以在那里查找为什么您的 URI/dashboard/会导致 HTTP 错误 404。

  • 该目录存在吗？
  • 是否有任何 RewriteRule 可以解决该问题？

答案2

我发现强制重写规则与 REQUEST_URI 匹配（通过在 REQUEST_URI 之前添加重写条件）可以解决该问题，因此以下方法对我有用：

<VirtualHost *:80>
    DocumentRoot /srv/emptywebroot
    <Directory /srv/emptywebroot>
        Require all denied
    </Directory>

    # Dashboard proxy
    RewriteEngine on
    LogLevel alert rewrite:trace6
    RewriteCond %{HTTP:Upgrade} =websocket
    RewriteCond %{REQUEST_URI} ^/dashboard
    RewriteRule /dashboard/(.*) ws://dashboard:3838/dashboard/$1 [P,L]
    RewriteCond %{HTTP:Upgrade} !=websocket
    RewriteCond %{REQUEST_URI} ^/dashboard
    RewriteRule /dashboard/(.*) http://dashboard:3838/dashboard/$1 [P,L]
    ProxyPreserveHost on
    ProxyPassReverse /dashboard http://dashboard:3838/dashboard
</VirtualHost>

我找到了文档http://httpd.apache.org/docs/current/mod/mod_rewrite.html#rewriterule有点令人困惑，因为它指出“在 VirtualHost 上下文中，Pattern 最初将与 URL 中主机名和端口之后、查询字符串之前的部分进行匹配（例如“/app1/index.html”）。这是（% 解码的）URL 路径。”，但在我的例子中，它似乎与本地解析路径匹配。因此，添加 RewriteCond 来修改 RewriteRule 重写的内容（在我的例子中是 REQUEST_URI）似乎有效。

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