Better error message when setting values on directories
Without this commit etcd returns the following error message when setting values on directories: { "errorCode":102, "message":"Not a file", "cause":"/postgres", "index":2 } While the above error message is accurate it's not very descriptive. This commit adds a new error code/message which better describes why the write operation failed. etcd now returns the following: { "errorCode":109, "message":"Cannot set value on directory", "cause":"/postgres", "index":2 }release-0.4
parent
3264b51a74
commit
d13dd50d51
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@ -21,6 +21,7 @@ Error code corresponding strerror
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EcodeNotDir = 104
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EcodeNodeExist = 105
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EcodeKeyIsPreserved = 106
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EcodeNoValueOnDir = 109
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EcodeValueRequired = 200
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EcodePrevValueRequired = 201
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@ -42,6 +43,7 @@ Error code corresponding strerror
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errors[104] = "Not A Directory"
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errors[105] = "Already exists" // create
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errors[106] = "The prefix of given key is a keyword in etcd"
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errors[109] = "Cannot set value on directory"
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// Post form related errors
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errors[200] = "Value is Required in POST form"
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@ -34,6 +34,7 @@ const (
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EcodeKeyIsPreserved = 106
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EcodeRootROnly = 107
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EcodeDirNotEmpty = 108
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EcodeNoValueOnDir = 109
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EcodeValueRequired = 200
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EcodePrevValueRequired = 201
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@ -66,6 +67,7 @@ func init() {
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errors[EcodeRootROnly] = "Root is read only"
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errors[EcodeKeyIsPreserved] = "The prefix of given key is a keyword in etcd"
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errors[EcodeDirNotEmpty] = "Directory not empty"
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errors[EcodeNoValueOnDir] = "Cannot set value on directory"
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// Post form related errors
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errors[EcodeValueRequired] = "Value is Required in POST form"
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@ -126,7 +128,7 @@ func (e Error) Write(w http.ResponseWriter) {
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switch e.ErrorCode {
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case EcodeKeyNotFound:
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status = http.StatusNotFound
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case EcodeNotFile, EcodeDirNotEmpty:
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case EcodeNotFile, EcodeDirNotEmpty, EcodeNoValueOnDir:
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status = http.StatusForbidden
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case EcodeTestFailed, EcodeNodeExist:
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status = http.StatusPreconditionFailed
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@ -102,7 +102,7 @@ func (n *node) Read() (string, *etcdErr.Error) {
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// If the receiver node is a directory, a "Not A File" error will be returned.
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func (n *node) Write(value string, index uint64) *etcdErr.Error {
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if n.IsDir() {
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return etcdErr.NewError(etcdErr.EcodeNotFile, "", n.store.Index())
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return etcdErr.NewError(etcdErr.EcodeNoValueOnDir, "", n.store.Index())
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}
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n.Value = value
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@ -419,7 +419,7 @@ func (s *store) Update(nodePath string, newValue string, expireTime time.Time) (
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if n.IsDir() && len(newValue) != 0 {
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// if the node is a directory, we cannot update value to non-empty
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s.Stats.Inc(UpdateFail)
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return nil, etcdErr.NewError(etcdErr.EcodeNotFile, nodePath, currIndex)
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return nil, etcdErr.NewError(etcdErr.EcodeNoValueOnDir, nodePath, currIndex)
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}
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n.Write(newValue, nextIndex)
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@ -481,7 +481,7 @@ func (s *store) internalCreate(nodePath string, dir bool, value string, unique,
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if n != nil {
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if replace {
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if n.IsDir() {
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return nil, etcdErr.NewError(etcdErr.EcodeNotFile, nodePath, currIndex)
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return nil, etcdErr.NewError(etcdErr.EcodeNoValueOnDir, nodePath, currIndex)
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}
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e.PrevNode = n.Repr(false, false)
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@ -232,8 +232,8 @@ func TestStoreUpdateFailsIfDirectory(t *testing.T) {
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s.Create("/foo", true, "", false, Permanent)
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e, _err := s.Update("/foo", "baz", Permanent)
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err := _err.(*etcdErr.Error)
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assert.Equal(t, err.ErrorCode, etcdErr.EcodeNotFile, "")
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assert.Equal(t, err.Message, "Not a file", "")
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assert.Equal(t, err.ErrorCode, etcdErr.EcodeNoValueOnDir, "")
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assert.Equal(t, err.Message, "Cannot set value on directory", "")
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assert.Equal(t, err.Cause, "/foo", "")
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assert.Nil(t, e, "")
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}
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