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godoc/httpzip.go: use correct path in Readdir

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Fixes a problem where Readdir would always return
empty directories (Readdir is only called by godoc
if the usual directory handler is commented out
in godoc.go, and if a zip file system is provided;
thus, this bug never manifested itself in godoc).

Also:
- better choice of variable/field names
- simplified error handling a bit
- better comments

R=bradfitz
CC=golang-dev
https://golang.org/cl/4813047
This commit is contained in:
Robert Griesemer 2011-07-22 22:24:04 -07:00
parent 8fdc2851e4
commit dcef981217
1 changed files with 18 additions and 20 deletions
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38
src/cmd/godoc/httpzip.go
View File

@ -14,7 +14,8 @@
// - The zip file system treats the file paths found in the zip internally
// like absolute paths w/o a leading '/'; i.e., the paths are considered
// relative to the root of the file system.
// - All path arguments to file system methods must be absolute paths.
// - All path arguments to file system methods are considered relative to
// the root specified with NewHttpZipFS (even if the paths start with a '/').
// TODO(gri) Should define a commonly used FileSystem API that is the same
// for http and godoc. Then we only need one zip-file based file
@ -43,6 +44,7 @@ const (
// httpZipFile is the zip-file based implementation of http.File
type httpZipFile struct {
path string // absolute path within zip FS without leading '/'
info os.FileInfo
io.ReadCloser // nil for directory
list zipList
@ -61,12 +63,8 @@ func (f *httpZipFile) Stat() (*os.FileInfo, os.Error) {
}
func (f *httpZipFile) Readdir(count int) ([]os.FileInfo, os.Error) {
if f.info.IsRegular() {
return nil, fmt.Errorf("Readdir called for regular file: %s", f.info.Name)
}
var list []os.FileInfo
dirname := zipPath(f.info.Name) + "/"
dirname := f.path + "/"
prevname := ""
for i, e := range f.list {
if count == 0 {
@ -114,13 +112,6 @@ func (f *httpZipFile) Readdir(count int) ([]os.FileInfo, os.Error) {
return list, nil
}
func (f *httpZipFile) Read(buf []byte) (int, os.Error) {
if f.info.IsRegular() {
return f.ReadCloser.Read(buf)
}
return 0, fmt.Errorf("Read called for directory: %s", f.info.Name)
}
func (f *httpZipFile) Seek(offset int64, whence int) (int64, os.Error) {
return 0, fmt.Errorf("Seek not implemented for zip file entry: %s", f.info.Name)
}
@ -132,11 +123,13 @@ type httpZipFS struct {
root string
}
func (fs *httpZipFS) Open(abspath string) (http.File, os.Error) {
name := path.Join(fs.root, abspath) // name is clean
index, exact := fs.list.lookup(name)
if index < 0 {
return nil, fmt.Errorf("file not found: %s", abspath)
func (fs *httpZipFS) Open(name string) (http.File, os.Error) {
// fs.root does not start with '/'.
path := path.Join(fs.root, name) // path is clean
index, exact := fs.list.lookup(path)
if index < 0 || !strings.HasPrefix(path, fs.root) {
// file not found or not under root
return nil, fmt.Errorf("file not found: %s", name)
}
if exact {
@ -147,8 +140,9 @@ func (fs *httpZipFS) Open(abspath string) (http.File, os.Error) {
return nil, err
}
return &httpZipFile{
path,
os.FileInfo{
Name: abspath,
Name: name,
Mode: S_IFREG,
Size: int64(f.UncompressedSize),
Mtime_ns: f.Mtime_ns(),
@ -160,8 +154,9 @@ func (fs *httpZipFS) Open(abspath string) (http.File, os.Error) {
// not an exact match - must be a directory
return &httpZipFile{
path,
os.FileInfo{
Name: abspath,
Name: name,
Mode: S_IFDIR,
// no size or mtime_ns for directories
},
@ -175,6 +170,9 @@ func (fs *httpZipFS) Close() os.Error {
return fs.ReadCloser.Close()
}
// NewHttpZipFS creates a new http.FileSystem based on the contents of
// the zip file rc restricted to the directory tree specified by root;
// root must be an absolute path.
func NewHttpZipFS(rc *zip.ReadCloser, root string) http.FileSystem {
list := make(zipList, len(rc.File))
copy(list, rc.File) // sort a copy of rc.File