Apache 服务器未为一个特定路径设置 Content-Type header
Apache Server not setting Content-Type header for one specific path
我有这个简单的 Apache 虚拟主机，它是唯一启用的：
<VirtualHost *:8000>
ServerName store.com
ServerAdmin admin@store.com
DocumentRoot /var/www/store/public
ErrorLog ${APACHE_LOG_DIR}/store-error.log
CustomLog ${APACHE_LOG_DIR}/store-access.log combined
ProxyPreserveHost On
ProxyRequests Off
<Proxy *>
Order Allow,Deny
Allow from all
</Proxy>
# Pass requests to puma
ProxyPass / http://127.0.0.1:8090/
ProxyPassReverse / http://127.0.0.1:8090/
</VirtualHost>
上游是 Puma 服务 运行 Ruby Rails/Spree。
当我通过 Apache (http://store.com:8000/store/) or directly through Puma (http://store.com:8090/store/) 访问商店根路径时，它对两者都非常有效。响应的Content-Type header设置为text/html; charset=utf-8.
当我在端口 8090 (http://store.com:8090/store/admin/orders/) 上直接通过 Puma 访问管理页面时，它也能正常工作，并向我发送这些 headers:
HTTP/1.1 200 OK
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Permitted-Cross-Domain-Policies: none
Referrer-Policy: strict-origin-when-cross-origin
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rel=preload; as=script; nopush,</assets/spree/backend/zone.self-52966ad40be27143d046936c2da8e9b688eb539d47baf7ee17864db179df6414.js?body=1>; rel=preload; as=script; nopush,</assets/spree/backend/all.self-ac4347b135ab8935f2dd20089f2acc8bec1d6b2ad528a80fcb03cd445dbd4d27.js?body=1>; rel=preload; as=script; nopush,</assets/select2_locale_en.self-9fe9edd5fbbdf7151ed20459f39a1c3d9cdce1916c0d04737620f998439e784f.js?body=1>; rel=preload; as=script; nopush,</assets/flatpickr/l10n/default.self-b39e1a541baf193385a84738d77c5a54c7dd5c3117fbcc26f3550f6203a295b7.js?body=1>; rel=preload; as=script; nopush
Content-Type: text/html; charset=utf-8
ETag: W/"a3b88ca70f8ab4b247de5554fb498e8e"
Cache-Control: max-age=0, private, must-revalidate
Set-Cookie: _store_session=0%2BIVGpmBrXrpvnyAk%2FqtG73t2M1TBFW3ZU1fwnsjbLujGgjFyKbWkv3KXsvaw1y23DOQ4mIlz8kapr58%2F8%2FqrxGdWtPtsFrHi6DugfIMvlnh7OGo2aO57bLOGn%2FSNF5lFxvYWc9NSqb0EGwaTBozlkj9OxV1tmYNvjH95kBR2U3tcHutdcB9r%2FRORZhquLFKuQeC%2B9WDwwmzRVGNfJ%2BR18gjl0tGQ%2BrnGsVTEiUtRZ6J%2Bk57TuJNocY%2BtbDpnbrBrMXjtM5Eq9kKYMTO4NR3YRHdJLkyfc1b02WeTKVAQeqk0DxpFxq2Tq9ksMyxAipKWgelE%2BbfrOVk3w5Eqze7pS%2FlLrRBDPGBrSsuCOkUZ6trnkuDG0kftQzcGgJP158Q0J9RU5zudjY0kxqJapFyZ0SxWJ%2BXPxH6Cke4SAIgzDu%2BkqXZSxtLzr3kzleyvEUhUH6dtT1XtqBLilrH79AheIRAgXBblQyyFgOnaBw753hToZjCCMiuTB1BRaA%3D--RNKCVv76Uu%2Bq8DRC--fIsT9BMj2fnOAcHf9%2BNxSA%3D%3D; path=/; HttpOnly; SameSite=Lax
X-Request-Id: 60bd6bca-2fd2-431d-8d88-f2b7601cea34
X-Runtime: 0.326021
Transfer-Encoding: chunked
请注意 Content-Type 存在。
但是当我通过 Apache (http://localhost:8000/store/admin/orders/) 访问同一页面（或 /store/admin/ 下的任何其他页面）时，我得到的是：
HTTP/1.1 200 OK
Date: Thu, 25 Feb 2021 09:17:27 GMT
Server: Apache/2.4.29 (Ubuntu) OpenSSL/1.1.1
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Permitted-Cross-Domain-Policies: none
Referrer-Policy: strict-origin-when-cross-origin
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ETag: W/"f9eccac0ce588fe0c01e2fd739bc8d7b"
Cache-Control: max-age=0, private, must-revalidate
X-Request-Id: b568eaf5-bd34-47ca-a235-690770c59a68
X-Runtime: 0.336446
Set-Cookie: _store_session=warAcwShWYD01kmquBk8P7V0YvKtBBhZdyNjnpyV%2B%2FVopHvQQ6Kyu1f795HjNCqXm8n6Es%2BqJU1DPwxmt6SQGPn8Yy7k11z92WtANujagcqAS9FamUnkp%2FLdXsGFnidjuCMbLx%2Bk0l6RRkMoo6Qx6%2BKJRGUCt0cROFQrx1P3D7fV9Y1uWRiif4E5yuHTU1tdAAFc%2FYqOM5yhR7ibiRmNB7IcjifPimleVp%2F24b2UsgusMlcC52QzkPcdK%2BUw8tGvjC%2FAq7BGunXfdFhrICjPd8oIoHMdOmki3MmQDTu0KfA8KB%2B5L3K6AJ0kgBOnazXStqAaru%2F0dQpFLqPIzeuUjArnQmxksBCggTZ5sRxdrCZAnC3Wjg3Hfx0Mbw49FY9mlDZKWUaj1YxUeVlA3wpJ9wTwAnYI%2BJyNVRkUgASuOEDkGYDhE0Z9J9yjolQecRB1dVZsnqzv4Dsza1fUWuQENrNlkmCmV5yJIMb2a7zR997IdPo%2Fsyugj6yeAn0%3D--yjVFUWTB0JfpISA9--07cks1cvGN%2FUIJlFhyOYNQ%3D%3D; path=/; HttpOnly; SameSite=Lax
Keep-Alive: timeout=300, max=200
Connection: Keep-Alive
Transfer-Encoding: chunked
没有Content-Type，所以浏览器尝试下载它。
知道这可能是什么原因吗？
编辑：我注意到 Link header 很大并且被 Apache 截断了，所以我将 Header unset Link 添加到我的虚拟主机配置中。没有发送了，问题依旧
找到问题了。
Rails 最近开始发送包含所有资源的 Link header，以便浏览器可以预加载它们。 See this PR.
问题是在开发过程中 header 会变得相当大（就像我的管理页面一样）。 Puma 与巨人 header 配合得很好，但 Apache 将 header 截断为 8 KiB（其中 7.58 是截断的 Link header）并且不发送一个完整的响应，因此缺少 Content-Type.
我只是通过将此添加到 config/environments/development.rb 来禁用 Rails (see this PR) 中的功能：
config.action_view.preload_links_header = false
并重新启动服务器。
这在生产中不太可能成为问题，因为资产通常会进行预编译和连接。
我有这个简单的 Apache 虚拟主机，它是唯一启用的：
<VirtualHost *:8000>
ServerName store.com
ServerAdmin admin@store.com
DocumentRoot /var/www/store/public
ErrorLog ${APACHE_LOG_DIR}/store-error.log
CustomLog ${APACHE_LOG_DIR}/store-access.log combined
ProxyPreserveHost On
ProxyRequests Off
<Proxy *>
Order Allow,Deny
Allow from all
</Proxy>
# Pass requests to puma
ProxyPass / http://127.0.0.1:8090/
ProxyPassReverse / http://127.0.0.1:8090/
</VirtualHost>
上游是 Puma 服务 运行 Ruby Rails/Spree。
当我通过 Apache (http://store.com:8000/store/) or directly through Puma (http://store.com:8090/store/) 访问商店根路径时，它对两者都非常有效。响应的Content-Type header设置为text/html; charset=utf-8.
当我在端口 8090 (http://store.com:8090/store/admin/orders/) 上直接通过 Puma 访问管理页面时，它也能正常工作，并向我发送这些 headers:
HTTP/1.1 200 OK
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Permitted-Cross-Domain-Policies: none
Referrer-Policy: strict-origin-when-cross-origin
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Content-Type: text/html; charset=utf-8
ETag: W/"a3b88ca70f8ab4b247de5554fb498e8e"
Cache-Control: max-age=0, private, must-revalidate
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X-Request-Id: 60bd6bca-2fd2-431d-8d88-f2b7601cea34
X-Runtime: 0.326021
Transfer-Encoding: chunked
请注意 Content-Type 存在。
但是当我通过 Apache (http://localhost:8000/store/admin/orders/) 访问同一页面（或 /store/admin/ 下的任何其他页面）时，我得到的是：
HTTP/1.1 200 OK
Date: Thu, 25 Feb 2021 09:17:27 GMT
Server: Apache/2.4.29 (Ubuntu) OpenSSL/1.1.1
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Permitted-Cross-Domain-Policies: none
Referrer-Policy: strict-origin-when-cross-origin
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没有Content-Type，所以浏览器尝试下载它。
知道这可能是什么原因吗？
编辑：我注意到 Link header 很大并且被 Apache 截断了，所以我将 Header unset Link 添加到我的虚拟主机配置中。没有发送了，问题依旧
找到问题了。
Rails 最近开始发送包含所有资源的 Link header，以便浏览器可以预加载它们。 See this PR.
问题是在开发过程中 header 会变得相当大（就像我的管理页面一样）。 Puma 与巨人 header 配合得很好，但 Apache 将 header 截断为 8 KiB（其中 7.58 是截断的 Link header）并且不发送一个完整的响应，因此缺少 Content-Type.
我只是通过将此添加到 config/environments/development.rb 来禁用 Rails (see this PR) 中的功能：
config.action_view.preload_links_header = false
并重新启动服务器。
这在生产中不太可能成为问题，因为资产通常会进行预编译和连接。