Fix public stat and listcontainer response to contain the correct prefix

[PVince81]

Fixes COPY operations on public links

For owncloud/ocis-reva#310

@butonic said that storage providers should not know about mount paths, but it seems this is currently technical debt / in discussion here: #578

so this PR is conforming to the current design.

• TEST: COPY non-public file

% curl -u einstein:relativity -k -X COPY -H "Destination: https://localhost:9200/remote.php/dav/files/einstein/test-copyprivate.txt" -D - 'https://localhost:9200/remote.php/dav/files/einstein/md5.txt'

HTTP/1.1 201 Created
Access-Control-Allow-Origin: *
Content-Length: 0
Content-Security-Policy: default-src 'none';
Date: Mon, 29 Jun 2020 12:43:24 GMT
Vary: Origin
X-Access-Token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZXZhIiwiZXhwIjoxNTkzNDM4MjA0LCJpYXQiOjE1OTM0MzQ2MDQsImlzcyI6Imh0dHBzOi8vbG9jYWxob3N0OjkyMDAiLCJ1c2VyIjp7ImlkIjp7ImlkcCI6Imh0dHBzOi8vbG9jYWxob3N0OjkyMDAiLCJvcGFxdWVfaWQiOiJlaW5zdGVpbiJ9LCJ1c2VybmFtZSI6ImVpbnN0ZWluIiwibWFpbCI6ImVpbnN0ZWluQGV4YW1wbGUub3JnIiwiZGlzcGxheV9uYW1lIjoiRWluc3RlaW4ifX0.kwNpTnr5-H-9POVHVkKe6DPKCC_72ewhSVea2EmfREA
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-Robots-Tag: none
X-Xss-Protection: 1; mode=block

• TEST: COPY non-public folder

% curl -u einstein:relativity -k -X COPY -H "Depth: infinity" -H "Destination: https://localhost:9200/remote.php/dav/files/einstein/copyprivate-folder" -D - 'https://localhost:9200/remote.php/dav/files/einstein/test'

HTTP/1.1 201 Created
Access-Control-Allow-Origin: *
Content-Length: 0
Content-Security-Policy: default-src 'none';
Date: Mon, 29 Jun 2020 12:44:36 GMT
Vary: Origin
X-Access-Token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZXZhIiwiZXhwIjoxNTkzNDM4Mjc2LCJpYXQiOjE1OTM0MzQ2NzYsImlzcyI6Imh0dHBzOi8vbG9jYWxob3N0OjkyMDAiLCJ1c2VyIjp7ImlkIjp7ImlkcCI6Imh0dHBzOi8vbG9jYWxob3N0OjkyMDAiLCJvcGFxdWVfaWQiOiJlaW5zdGVpbiJ9LCJ1c2VybmFtZSI6ImVpbnN0ZWluIiwibWFpbCI6ImVpbnN0ZWluQGV4YW1wbGUub3JnIiwiZGlzcGxheV9uYW1lIjoiRWluc3RlaW4ifX0.lOgrmRnoBNIyRmNyICKj2w9dL0xPhmcWHZ-FqbXZ1jk
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-Robots-Tag: none
X-Xss-Protection: 1; mode=block

• TEST: COPY file within public folder

% curl -k -X COPY -H "Destination: https://localhost:9200/remote.php/dav/public-files/UbDkKrggmxpB/test-copy-file.txt" -D - 'https://localhost:9200/remote.php/dav/public-files/UbDkKrggmxpB/md5.txt'                                               
HTTP/1.1 201 Created
Access-Control-Allow-Origin: *
Content-Length: 0
Content-Security-Policy: default-src 'none';
Date: Mon, 29 Jun 2020 12:43:02 GMT
Vary: Origin
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-Robots-Tag: none
X-Xss-Protection: 1; mode=block

• TEST: COPY folder within public folder

% curl -k -H "Depth: infinity" -X COPY -H "Destination: https://localhost:9200/remote.php/dav/public-files/UbDkKrggmxpB/test-folder-copy-test" -D - 'https://localhost:9200/remote.php/dav/public-files/UbDkKrggmxpB/test'
HTTP/1.1 201 Created
Access-Control-Allow-Origin: *
Content-Length: 0
Content-Security-Policy: default-src 'none';
Date: Mon, 29 Jun 2020 12:42:26 GMT
Vary: Origin
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-Robots-Tag: none
X-Xss-Protection: 1; mode=block

• TEST: run related acceptance tests
  • PROPFIND as this might use listcontainer
  • existing COPY tests

[refs]

thanks for formalizing this a little!