func (s *Server) get(wr http.ResponseWriter, r *http.Request) {
var (
v *volume.Volume
n *needle.Needle
err error
vid, key, cookie int64
ret = http.StatusOK
params = r.URL.Query()
now = time.Now()
)
if r.Method != "GET" && r.Method != "HEAD" {
ret = http.StatusMethodNotAllowed
http.Error(wr, "method not allowed", ret)
return
}
defer HttpGetWriter(r, wr, now, &err, &ret)
if vid, err = strconv.ParseInt(params.Get("vid"), 10, 32); err != nil {
log.Errorf("strconv.ParseInt(\"%s\") error(%v)", params.Get("vid"), err)
ret = http.StatusBadRequest
return
}
if key, err = strconv.ParseInt(params.Get("key"), 10, 64); err != nil {
log.Errorf("strconv.ParseInt(\"%s\") error(%v)", params.Get("key"), err)
ret = http.StatusBadRequest
return
}
if cookie, err = strconv.ParseInt(params.Get("cookie"), 10, 32); err != nil {
log.Errorf("strconv.ParseInt(\"%s\") error(%v)", params.Get("cookie"), err)
ret = http.StatusBadRequest
return
}
n = s.store.Needle()
n.Key = key
n.Cookie = int32(cookie)
if v = s.store.Volumes[int32(vid)]; v != nil {
if err = v.Get(n); err != nil {
if err == errors.ErrNeedleDeleted || err == errors.ErrNeedleNotExist {
ret = http.StatusNotFound
} else {
ret = http.StatusInternalServerError
}
}
} else {
ret = http.StatusNotFound
err = errors.ErrVolumeNotExist
}
if err == nil {
if r.Method == "GET" {
if _, err = wr.Write(n.Data); err != nil {
log.Errorf("wr.Write() error(%v)", err)
ret = http.StatusInternalServerError
}
}
if log.V(1) {
log.Infof("get a needle: %v", n)
}
}
s.store.FreeNeedle(n)
return
}
// Probe probe a needle by key.
func (v *Volume) Probe(n *needle.Needle) (err error) {
var key int64
v.lock.RLock()
// get a rand key
for key, _ = range v.needles {
break
}
v.lock.RUnlock()
n.Key = key
if err = v.get(n); err != nil {
return
}
return
}