filesystem

package
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 Go to latest Published: Dec 5, 2024 License: MIT Imports: 29 Imported by: 0

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Constants

This section is empty.

Variables

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var SkipThis = errors.New("skip this")

Functions

func IsErrorCode 

func IsErrorCode(err error, code ErrorCode) bool

IsErrorCode checks if "err" is a filesystem Error type. If so, it will then drop in and check that the error code is the same as the provided ErrorCode passed in "code".

func IsFilesystemError 

func IsFilesystemError(err error) bool

IsFilesystemError checks if the given error is one of the Filesystem errors.

func NewBadPathResolution 

func NewBadPathResolution(path string, resolved string) error

NewBadPathResolution returns a new BadPathResolution error.

Types

type Archive 

type Archive struct {
	// Filesystem to create the archive with.
	Filesystem *Filesystem

	// Ignore is a gitignore string (most likely read from a file) of files to ignore
	// from the archive.
	Ignore string

	// BaseDirectory .
	BaseDirectory string

	// Files specifies the files to archive, this takes priority over the Ignore
	// option, if unspecified, all files in the BaseDirectory will be archived
	// unless Ignore is set.
	Files []string

	// Progress wraps the writer of the archive to pass through the progress tracker.
	Progress *progress.Progress
	// contains filtered or unexported fields
}

func (*Archive) Create 

func (a *Archive) Create(ctx context.Context, dst string) error

Create creates an archive at dst with all the files defined in the included Files array.

THIS IS UNSAFE TO USE IF `dst` IS PROVIDED BY A USER! ONLY USE THIS WITH CONTROLLED PATHS!

func (*Archive) Stream 

func (a *Archive) Stream(ctx context.Context, w io.Writer) error

Stream streams the creation of the archive to the given writer.

type Error 

type Error struct {
	// contains filtered or unexported fields
}

func (*Error) Code 

func (e *Error) Code() ErrorCode

Code returns the ErrorCode for this specific error instance.

func (*Error) Error 

func (e *Error) Error() string

Returns a human-readable error string to identify the Error by.

func (*Error) Unwrap 

func (e *Error) Unwrap() error

Unwrap returns the underlying cause of this filesystem error. In some causes there may not be a cause present, in which case nil will be returned.

type ErrorCode 

type ErrorCode string
const (
	ErrCodeIsDirectory    ErrorCode = "E_ISDIR"
	ErrCodeDiskSpace      ErrorCode = "E_NODISK"
	ErrCodeUnknownArchive ErrorCode = "E_UNKNFMT"
	ErrCodePathResolution ErrorCode = "E_BADPATH"
	ErrCodeDenylistFile   ErrorCode = "E_DENYLIST"
	ErrCodeUnknownError   ErrorCode = "E_UNKNOWN"
	ErrNotExist           ErrorCode = "E_NOTEXIST"
)

type Filesystem 

type Filesystem struct {
	// contains filtered or unexported fields
}

func New 

func New(root string, size int64, denylist []string) (*Filesystem, error)

New creates a new Filesystem instance for a given server.

func (*Filesystem) CachedUsage 

func (fs *Filesystem) CachedUsage() int64

Returns the cached value for the amount of disk space used by the filesystem. Do not rely on this function for critical logical checks. It should only be used in areas where the actual disk usage does not need to be perfect, e.g. API responses for server resource usage.

func (*Filesystem) Chmod 

func (fs *Filesystem) Chmod(path string, mode ufs.FileMode) error

func (*Filesystem) Chown 

func (fs *Filesystem) Chown(p string) error

Chown recursively iterates over a file or directory and sets the permissions on all of the underlying files. Iterate over all of the files and directories. If it is a file just go ahead and perform the chown operation. Otherwise dig deeper into the directory until we've run out of directories to dig into.

func (*Filesystem) Chtimes 

func (fs *Filesystem) Chtimes(path string, atime, mtime time.Time) error

func (*Filesystem) CompressFiles 

func (fs *Filesystem) CompressFiles(dir string, paths []string) (ufs.FileInfo, error)

CompressFiles compresses all the files matching the given paths in the specified directory. This function also supports passing nested paths to only compress certain files and folders when working in a larger directory. This effectively creates a local backup, but rather than ignoring specific files and folders, it takes an allow-list of files and folders.

All paths are relative to the dir that is passed in as the first argument, and the compressed file will be placed at that location named `archive-{date}.tar.gz`.

func (*Filesystem) Copy 

func (fs *Filesystem) Copy(p string) error

Copy copies a given file to the same location and appends a suffix to the file to indicate that it has been copied.

func (*Filesystem) CreateDirectory 

func (fs *Filesystem) CreateDirectory(name string, p string) error

CreateDirectory creates a new directory (name) at a specified path (p) for the server.

func (*Filesystem) DecompressFile 

func (fs *Filesystem) DecompressFile(ctx context.Context, dir string, file string) error

DecompressFile will decompress a file in a given directory by using the archiver tool to infer the file type and go from there. This will walk over all the files within the given archive and ensure that there is not a zip-slip attack being attempted by validating that the final path is within the server data directory.

func (*Filesystem) Delete 

func (fs *Filesystem) Delete(p string) error

Delete removes a file or folder from the system. Prevents the user from accidentally (or maliciously) removing their root server data directory.

func (*Filesystem) DirectorySize 

func (fs *Filesystem) DirectorySize(root string) (int64, error)

DirectorySize calculates the size of a directory and its descendants.

func (*Filesystem) DiskUsage 

func (fs *Filesystem) DiskUsage(allowStaleValue bool) (int64, error)

Internal helper function to allow other parts of the codebase to check the total used disk space as needed without overly taxing the system. This will prioritize the value from the cache to avoid excessive IO usage. We will only walk the filesystem and determine the size of the directory if there is no longer a cached value.

If "allowStaleValue" is set to true, a stale value MAY be returned to the caller if there is an expired cache value AND there is currently another lookup in progress. If there is no cached value but no other lookup is in progress, a fresh disk space response will be returned to the caller.

This is primarily to avoid a bunch of I/O operations from piling up on the server, especially on servers with a large amount of files.

func (*Filesystem) ExtractStreamUnsafe 

func (fs *Filesystem) ExtractStreamUnsafe(ctx context.Context, dir string, r io.Reader) error

ExtractStreamUnsafe .

func (*Filesystem) File 

func (fs *Filesystem) File(p string) (ufs.File, Stat, error)

File returns a reader for a file instance as well as the stat information.

func (*Filesystem) HasSpaceAvailable 

func (fs *Filesystem) HasSpaceAvailable(allowStaleValue bool) bool

Determines if the directory a file is trying to be added to has enough space available for the file to be written to.

Because determining the amount of space being used by a server is a taxing operation we will load it all up into a cache and pull from that as long as the key is not expired.

This operation will potentially block unless allowStaleValue is set to true. See the documentation on DiskUsage for how this affects the call.

func (*Filesystem) HasSpaceErr 

func (fs *Filesystem) HasSpaceErr(allowStaleValue bool) error

The same concept as HasSpaceAvailable however this will return an error if there is no space, rather than a boolean value.

func (*Filesystem) HasSpaceFor 

func (fs *Filesystem) HasSpaceFor(size int64) error

func (*Filesystem) IsIgnored 

func (fs *Filesystem) IsIgnored(paths ...string) error

Checks if the given file or path is in the server's file denylist. If so, an Error is returned, otherwise nil is returned.

func (*Filesystem) ListDirectory 

func (fs *Filesystem) ListDirectory(p string) ([]Stat, error)

ListDirectory lists the contents of a given directory and returns stat information about each file and folder within it.

func (*Filesystem) MaxDisk 

func (fs *Filesystem) MaxDisk() int64

MaxDisk returns the maximum amount of disk space that this Filesystem instance is allowed to use.

func (*Filesystem) Path 

func (fs *Filesystem) Path() string

Path returns the root path for the Filesystem instance.

func (*Filesystem) ReadDir 

func (fs *Filesystem) ReadDir(path string) ([]ufs.DirEntry, error)

ReadDir reads directory entries.

func (*Filesystem) ReadDirStat 

func (fs *Filesystem) ReadDirStat(path string) ([]ufs.FileInfo, error)

ReadDirStat is like ReadDir except that it returns FileInfo for each entry instead of just a DirEntry.

func (*Filesystem) Rename 

func (fs *Filesystem) Rename(oldpath, newpath string) error

func (*Filesystem) SetDiskLimit 

func (fs *Filesystem) SetDiskLimit(i int64)

SetDiskLimit sets the disk space limit for this Filesystem instance.

func (*Filesystem) SpaceAvailableForDecompression 

func (fs *Filesystem) SpaceAvailableForDecompression(ctx context.Context, dir string, file string) error

SpaceAvailableForDecompression looks through a given archive and determines if decompressing it would put the server over its allocated disk space limit.

func (*Filesystem) Stat 

func (fs *Filesystem) Stat(p string) (Stat, error)

Stat stats a file or folder and returns the base stat object from go along with the MIME data that can be used for editing files. 

func (fs *Filesystem) Symlink(oldpath, newpath string) error

func (*Filesystem) Touch 

func (fs *Filesystem) Touch(p string, flag int) (ufs.File, error)

Touch acts by creating the given file and path on the disk if it is not present already. If it is present, the file is opened using the defaults which will truncate the contents. The opened file is then returned to the caller.

func (*Filesystem) TruncateRootDirectory 

func (fs *Filesystem) TruncateRootDirectory() error

TruncateRootDirectory removes _all_ files and directories from a server's data directory and resets the used disk space to zero.

func (*Filesystem) UnixFS 

func (fs *Filesystem) UnixFS() *ufs.UnixFS

func (*Filesystem) Write 

func (fs *Filesystem) Write(p string, r io.Reader, newSize int64, mode ufs.FileMode) error

func (*Filesystem) Writefile 

func (fs *Filesystem) Writefile(p string, r io.Reader) error

Writefile writes a file to the system. If the file does not already exist one will be created. This will also properly recalculate the disk space used by the server when writing new files or modifying existing ones.

DEPRECATED: use `Write` instead.

type SpaceCheckingOpts 

type SpaceCheckingOpts struct {
	AllowStaleResponse bool
}

type Stat 

type Stat struct {
	ufs.FileInfo
	Mimetype string
}

func (*Stat) CTime 

func (s *Stat) CTime() time.Time

CTime returns the time that the file/folder was created.

TODO: remove. Ctim is not actually ever been correct and doesn't actually return the creation time.

func (*Stat) MarshalJSON 

func (s *Stat) MarshalJSON() ([]byte, error)

type TarProgress 

type TarProgress struct {
	*tar.Writer
	// contains filtered or unexported fields
}

TarProgress .

func NewTarProgress 

func NewTarProgress(w *tar.Writer, p *progress.Progress) *TarProgress

NewTarProgress .

func (*TarProgress) Write 

func (p *TarProgress) Write(v []byte) (int, error)

Write .

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