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Check disk space before trying a write from the downloader; don't make empty directories if we can't even write the file

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This commit is contained in:
Dane Everitt
2020-12-20 11:17:53 -08:00
parent 9c53436470
commit c718da20e3
4 changed files with 33 additions and 22 deletions
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40
server/filesystem/filesystem.go
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@@ -86,34 +86,36 @@ func (fs *Filesystem) Writefile(p string, r io.Reader) error {
var currentSize int64
// If the file does not exist on the system already go ahead and create the pathway
// to it and an empty file. We'll then write to it later on after this completes.
if stat, err := os.Stat(cleaned); err != nil {
if !os.IsNotExist(err) {
return err
}
if err := os.MkdirAll(filepath.Dir(cleaned), 0755); err != nil {
return err
}
if err := fs.Chown(filepath.Dir(cleaned)); err != nil {
return err
}
} else {
stat, err := os.Stat(cleaned)
if err != nil && !os.IsNotExist(err) {
return err
} else if err == nil {
if stat.IsDir() {
return &Error{code: ErrCodeIsDirectory}
}
currentSize = stat.Size()
}
br := bufio.NewReader(r)
// Check that the new size we're writing to the disk can fit. If there is currently a file
// we'll subtract that current file size from the size of the buffer to determine the amount
// of new data we're writing (or amount we're removing if smaller).
if err := fs.hasSpaceFor(int64(br.Size()) - currentSize); err != nil {
// Check that the new size we're writing to the disk can fit. If there is currently
// a file we'll subtract that current file size from the size of the buffer to determine
// the amount of new data we're writing (or amount we're removing if smaller).
if err := fs.HasSpaceFor(int64(br.Size()) - currentSize); err != nil {
return err
}
// If we were unable to stat the location because it did not exist, go ahead and create
// it now. We do this after checking the disk space so that we do not just create empty
// directories at random.
if err != nil {
if err := os.MkdirAll(filepath.Dir(cleaned), 0755); err != nil {
return err
}
if err := fs.Chown(filepath.Dir(cleaned)); err != nil {
return err
}
}
o := &fileOpener{}
// This will either create the file if it does not already exist, or open and
// truncate the existing file.
@@ -298,7 +300,7 @@ func (fs *Filesystem) Copy(p string) error {
}
// Check that copying this file wouldn't put the server over its limit.
if err := fs.hasSpaceFor(s.Size()); err != nil {
if err := fs.HasSpaceFor(s.Size()); err != nil {
return err
}