/sbin/mount.davfs：安装失败；服务器不支持 WebDAV答案

【问题标题】：/sbin/mount.davfs: mounting failed; the server does not support WebDAV/sbin/mount.davfs：安装失败；服务器不支持 WebDAV
【发布时间】：2022-07-06 16:21:01
【问题描述】：

我正在尝试挂载远程 webdav：

sudo mount -t davfs https://files.isric.org/soilgrids/latest/data/ ~/webdav

但我只收到以下错误：/sbin/mount.davfs: mounting failed; the server does not support WebDAV

此服务器是运行在 kubernetes 集群中的 wsgidav。

与 nautilus 相同的问题，使用gvfsd-dav 来调试问题，如here 所示。我有来自服务器的以下 HTTP 请求/响应：

/usr/libexec/gvfsd-dav ssl=true user=anonymous host=files.isric.org  prefix=/soilgrids/latest/data/
dav: setting 'ssl' to 'true'
dav: setting 'user' to 'anonymous'
dav: setting 'host' to 'files.isric.org'
dav: setting 'prefix' to '/soilgrids/latest/data/'
dav: Added new job source 0x556590e0c1a0 (GVfsBackendDav)
dav: Queued new job 0x556590e0a380 (GVfsJobMount)
dav: + mount
> OPTIONS /soilgrids/latest/data HTTP/1.1
> Soup-Debug-Timestamp: 1657091152
> Soup-Debug: SoupSession 1 (0x556590e0c100), SoupMessage 1 (0x7fa1b40060e0), SoupSocket 1 (0x7fa1b43440e0)
> Host: files.isric.org
> Accept-Encoding: gzip, deflate
> User-Agent: gvfs/1.48.2
> Accept-Language: en-us, en;q=0.9
> Connection: Keep-Alive
  
< HTTP/1.1 204 No Content
< Soup-Debug-Timestamp: 1657091152
< Soup-Debug: SoupMessage 1 (0x7fa1b40060e0)
< Date: Wed, 06 Jul 2022 07:05:52 GMT
< Connection: keep-alive
< Strict-Transport-Security: max-age=15724800; includeSubDomains
< Access-Control-Allow-Origin: *
< Access-Control-Allow-Credentials: true
< Access-Control-Allow-Methods: GET, OPTIONS, HEAD
< Access-Control-Allow-Headers: Content-Type, Accept-Ranges, Content-Range, Range, Content-Encoding, Content-Length, Access-Control-Allow-Origin
< Access-Control-Max-Age: 1728000
< Content-Length: 0
< 
  
dav: send_reply(0x556590e0a380), failed=1 (Not a WebDAV enabled share)
dav: Mount failed: Not a WebDAV enabled share

服务器HTTP响应为HTTP/1.1 204 No Content

【问题讨论】：

标签： kubernetes kubernetes-ingress webdav wsgidav

【解决方案1】：

问题在于 k8s 入口有：

apiVersion: networking.k8s.io/v1 
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/enable-cors: "true"
    nginx.ingress.kubernetes.io/cors-allow-methods: "GET, OPTIONS, HEAD"
    nginx.ingress.kubernetes.io/cors-allow-headers: "Content-Type, Accept-Ranges, Content-Range, Range, Content-Encoding, Content-Length, Access-Control-Allow-Origin"

HTTP/1.1 204 No Content 响应是正确的pre-flight CORS 响应由入口提供，这不是预期的 WebDAV 响应，第一个请求不是甚至到达运行 wsgidav 的 pod。

解决方案：在入口处禁用 CORS 支持。然后一切正常：

/usr/libexec/gvfsd-dav ssl=true user=anonymous host=files.isric.org  prefix=/soilgrids/latest/data/
> OPTIONS /soilgrids/latest/data HTTP/1.1
> Soup-Debug-Timestamp: 1657095042
> Soup-Debug: SoupSession 1 (0x55758f924100), SoupMessage 1 (0x7f01180060d0), SoupSocket 1 (0x7f0118342110)
> Host: dev-files.isric.org
> Accept-Encoding: gzip, deflate
> User-Agent: gvfs/1.48.2
> Accept-Language: en-us, en;q=0.9
> Connection: Keep-Alive
  
< HTTP/1.1 200 OK
< Soup-Debug-Timestamp: 1657095042
< Soup-Debug: SoupMessage 1 (0x7f01180060d0)
< Date: Wed, 06 Jul 2022 08:10:42 GMT
< Content-Type: text/html
< Content-Length: 0
< Connection: keep-alive
< DAV: 1
< Allow: OPTIONS, HEAD, GET, PROPFIND
< MS-Author-Via: DAV
< Strict-Transport-Security: max-age=15724800; includeSubDomains
<

【讨论】：