func (h *methodHandler) HandleRequest(c *gmvc.Context) error {
in := make([]reflect.Value, len(h.args)+1)
in[0] = h.controller
for i, arg := range h.args {
v, err := arg.Get(c)
if err != nil {
c.ErrorStatus(err, http.StatusBadRequest)
return nil
}
in[i+1] = v
}
out := h.method.Func.Call(in)
if h.outErr != -1 {
errv := out[h.outErr]
if !errv.IsNil() {
return errv.Interface().(error)
}
}
return nil
}
func (v *FileView) Render(c *gmvc.Context, name string, data interface{}) error {
w := c.ResponseWriter
r := c.Request
root, err := filepath.Abs(v.root)
if err != nil {
return err
}
p := path.Join(root, name)
if !strings.HasPrefix(p, root) {
c.Status(http.StatusBadRequest)
return nil
}
f, err := os.Open(p)
if err != nil {
c.Status(http.StatusNotFound)
return nil
}
defer f.Close()
d, err1 := f.Stat()
if err1 != nil {
c.Status(http.StatusNotFound)
return nil
}
if d.IsDir() {
c.Status(http.StatusNotFound)
return nil
}
if v.checkLastModified(w, r, d.ModTime()) {
return nil
}
code := http.StatusOK
ctype := w.Header().Get("Content-Type")
if ctype == "" {
ctype = mime.TypeByExtension(filepath.Ext(name))
if ctype != "" {
w.Header().Set("Content-Type", ctype)
}
}
size := d.Size()
sendSize := size
var sendContent io.Reader = f
if size >= 0 {
ranges, err := v.parseRange(r.Header.Get("Range"), size)
if err != nil {
c.ErrorStatus(err, http.StatusRequestedRangeNotSatisfiable)
return nil
}
if v.sumRangesSize(ranges) >= size {
ranges = nil
}
switch {
case len(ranges) == 1:
ra := ranges[0]
if _, err := f.Seek(ra.start, os.SEEK_SET); err != nil {
c.ErrorStatus(err, http.StatusRequestedRangeNotSatisfiable)
return nil
}
sendSize = ra.length
code = http.StatusPartialContent
w.Header().Set("Content-Range", ra.contentRange(size))
case len(ranges) > 1:
for _, ra := range ranges {
if ra.start > size {
c.ErrorStatus(err, http.StatusRequestedRangeNotSatisfiable)
return nil
}
}
sendSize = v.rangesMIMESize(ranges, ctype, size)
code = http.StatusPartialContent
pr, pw := io.Pipe()
mw := multipart.NewWriter(pw)
w.Header().Set("Content-Type", "multipart/byteranges; boundary="+mw.Boundary())
sendContent = pr
defer pr.Close()
go func() {
for _, ra := range ranges {
part, err := mw.CreatePart(ra.mimeHeader(ctype, size))
if err != nil {
pw.CloseWithError(err)
return
}
if _, err := f.Seek(ra.start, os.SEEK_SET); err != nil {
pw.CloseWithError(err)
return
}
if _, err := io.CopyN(part, f, ra.length); err != nil {
pw.CloseWithError(err)
return
}
}
mw.Close()
pw.Close()
}()
}
w.Header().Set("Accept-Ranges", "bytes")
if w.Header().Get("Content-Encoding") == "" {
w.Header().Set("Content-Length", strconv.FormatInt(sendSize, 10))
}
}
w.WriteHeader(code)
if r.Method != "HEAD" {
io.CopyN(w, sendContent, sendSize)
}
return nil
}