// KVSPut handles a DELETE request
func (s *HTTPServer) KVSDelete(resp http.ResponseWriter, req *http.Request, args *structs.KeyRequest) (interface{}, error) {
applyReq := structs.KVSRequest{
Datacenter: args.Datacenter,
Op: structs.KVSDelete,
DirEnt: structs.DirEntry{
Key: args.Key,
},
}
applyReq.Token = args.Token
// Check for recurse
params := req.URL.Query()
if _, ok := params["recurse"]; ok {
applyReq.Op = structs.KVSDeleteTree
} else if missingKey(resp, args) {
return nil, nil
}
// Check for cas value
if _, ok := params["cas"]; ok {
casVal, err := strconv.ParseUint(params.Get("cas"), 10, 64)
if err != nil {
return nil, err
}
applyReq.DirEnt.ModifyIndex = casVal
applyReq.Op = structs.KVSDeleteCAS
}
// Make the RPC
var out bool
if err := s.agent.RPC("KVS.Apply", &applyReq, &out); err != nil {
return nil, err
}
// Only use the out value if this was a CAS
if applyReq.Op == structs.KVSDeleteCAS {
return out, nil
} else {
return true, nil
}
}
// KVSPut handles a PUT request
func (s *HTTPServer) KVSPut(resp http.ResponseWriter, req *http.Request, args *structs.KeyRequest) (interface{}, error) {
if missingKey(resp, args) {
return nil, nil
}
applyReq := structs.KVSRequest{
Datacenter: args.Datacenter,
Op: structs.KVSSet,
DirEnt: structs.DirEntry{
Key: args.Key,
Flags: 0,
Value: nil,
},
}
applyReq.Token = args.Token
// Check for flags
params := req.URL.Query()
if _, ok := params["flags"]; ok {
flagVal, err := strconv.ParseUint(params.Get("flags"), 10, 64)
if err != nil {
return nil, err
}
applyReq.DirEnt.Flags = flagVal
}
// Check for cas value
if _, ok := params["cas"]; ok {
casVal, err := strconv.ParseUint(params.Get("cas"), 10, 64)
if err != nil {
return nil, err
}
applyReq.DirEnt.ModifyIndex = casVal
applyReq.Op = structs.KVSCAS
}
// Check for lock acquisition
if _, ok := params["acquire"]; ok {
applyReq.DirEnt.Session = params.Get("acquire")
applyReq.Op = structs.KVSLock
}
// Check for lock release
if _, ok := params["release"]; ok {
applyReq.DirEnt.Session = params.Get("release")
applyReq.Op = structs.KVSUnlock
}
// Check the content-length
if req.ContentLength > maxKVSize {
resp.WriteHeader(413)
resp.Write([]byte(fmt.Sprintf("Value exceeds %d byte limit", maxKVSize)))
return nil, nil
}
// Copy the value
buf := bytes.NewBuffer(nil)
if _, err := io.Copy(buf, req.Body); err != nil {
return nil, err
}
applyReq.DirEnt.Value = buf.Bytes()
// Make the RPC
var out bool
if err := s.agent.RPC("KVS.Apply", &applyReq, &out); err != nil {
return nil, err
}
// Only use the out value if this was a CAS
if applyReq.Op == structs.KVSSet {
return true, nil
} else {
return out, nil
}
}