It's only reasonable to have proper type hinting here which might even help us to catch bugs.

Fixes https://github.com/owncloud/core/issues/11133

Adds some hardening against potential CSP bypassed.

Due to our CSP policy this link won’t work as it it considered as
inline Javascript.

This commit replaces the link with a static link to the files app.

Reimplementation of #8067 - fixes #7742

php can only parse filesize units up to gigabytes, not terabytes or petabytes.

When detecting whether the file to be downloaded is on external storage,
the correct path needs to be used.

It turns out that \OC\Files\View is needed to resolve the path correctly
relative to the user's home.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/owncloud/core/inspections/cdfecc4e-a37e-4233-8025-f0d7252a8720

Enabled analysis tools:
 - PHP Analyzer
 - JSHint
 - PHP Copy/Paste Detector
 - PHP PDepend

- When all files are selected, do not send the whole file list
- Download will trigger download for the parent folder, also works
  with root
- Delete will send "allfiles" to the server that will find the file
  list or the passed directory by itself

Added isLocal() method to Storage to find out whether the storage is
local or not.
This method is used for the x-sendfile logic to find out whether to add
the headers.

cleaned up get() logic
fixed get() to only send headers if requested (xsendfile could get in the way)
do no longer readfile() when already using mod_xsendfile or similar

Added new OC\Response API called setContentDispositionHeader() that
contains the needed workarounds for UTF8 and IE.

Refactored download code to use the new API.

Removed unused trashbin download file.

The file on disk is encrypted, and not readable on client systems

Until now, addSendfileHeader() was called even when no x-send-file
headers were set. Even though the method itself doesn't do anything,
a call to getLocalFile() was done and would trigger a full download
when using external storage.

Additionally, the storage resolution code is wrong and always
returns the local storage of the root filesystem, which caused the code to
be run anyway.

This commit fixes both issues.

Added argument to getFileInfo() to disable adding the size of
mountpoints to a directory's size.

Fixes #5924

Conflicts:
	lib/private/vcategories.php

This way the error won't be fatal in a unit test

Made some small changes which might have caused a segfault on ci.tmit.eu earlier.

LigHTTPd does not support HTTP Range headers with the X-Sendfile header in the way Apache does. Instead, it needs to be handled in the backend. This commit does exactly that, using the X-Sendfile2 header to send ranges of files.
To accomplish this without breaking web servers that don't support X-Sendfile2, a new variable MOD_X_SENDFILE2_ENABLED was introduced to separate this method from X-Sendfile and X-Accel-Redirect.

Fix OC_Files::get() to not return the first character of the filename
if only one file is requested.