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TUN-3443: Decode as v4api response on non-200 status

This commit is contained in:
cthuang 2020-10-02 14:40:23 +01:00 committed by Chung Ting Huang
parent be7b7c7149
commit 812244d79f
2 changed files with 38 additions and 23 deletions
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49
tunnelstore/client.go
View File

@ -376,16 +376,12 @@ func (r *RESTClient) sendRequest(method string, url url.URL, body interface{}) (
func parseResponse(reader io.Reader, data interface{}) error {
// Schema for Tunnelstore responses in the v1 API.
// Roughly, it's a wrapper around a particular result that adds failures/errors/etc
var result struct {
Result json.RawMessage `json:"result"`
Success bool `json:"success"`
Errors []string `json:"errors"`
}
var result response
// First, parse the wrapper and check the API call succeeded
if err := json.NewDecoder(reader).Decode(&result); err != nil {
return errors.Wrap(err, "failed to decode response")
}
if err := checkErrors(result.Errors); err != nil {
if err := result.checkErrors(); err != nil {
return err
}
if !result.Success {
@ -402,24 +398,43 @@ func unmarshalTunnel(reader io.Reader) (*Tunnel, error) {
return &tunnel, err
}
func checkErrors(errs []string) error {
if len(errs) == 0 {
type response struct {
Success bool `json:"success,omitempty"`
Errors []apiErr `json:"errors,omitempty"`
Messages []string `json:"messages,omitempty"`
Result json.RawMessage `json:"result,omitempty"`
}
func (r *response) checkErrors() error {
if len(r.Errors) == 0 {
return nil
}
if len(errs) == 1 {
return fmt.Errorf("API error: %s", errs[0])
if len(r.Errors) == 1 {
return r.Errors[0]
}
allErrs := strings.Join(errs, "; ")
return fmt.Errorf("API errors: %s", allErrs)
var messages string
for _, e := range r.Errors {
messages += fmt.Sprintf("%s; ", e)
}
return fmt.Errorf("API errors: %s", messages)
}
type apiErr struct {
Code json.Number `json:"code,omitempty"`
Message string `json:"message,omitempty"`
}
func (e apiErr) Error() string {
return fmt.Sprintf("code: %v, reason: %s", e.Code, e.Message)
}
func (r *RESTClient) statusCodeToError(op string, resp *http.Response) error {
if resp.Header.Get("Content-Type") == "application/json" {
var errorsResp struct {
Error string `json:"error"`
}
if json.NewDecoder(resp.Body).Decode(&errorsResp) == nil && errorsResp.Error != "" {
return errors.Errorf("Failed to %s: %s", op, errorsResp.Error)
var errorsResp response
if json.NewDecoder(resp.Body).Decode(&errorsResp) == nil {
if err := errorsResp.checkErrors(); err != nil {
return errors.Errorf("Failed to %s: %s", op, err)
}
}
}

12
tunnelstore/client_test.go
View File

@ -30,8 +30,8 @@ func TestDNSRouteUnmarshalResult(t *testing.T) {
badJSON := []string{
`abc`,
`{"success": false, "result": {"cname": "new"}}`,
`{"errors": ["foo"], "result": {"cname": "new"}}`,
`{"errors": ["foo", "bar"], "result": {"cname": "new"}}`,
`{"errors": [{"code": 1003, "message":"An A, AAAA or CNAME record already exists with that host"}], "result": {"cname": "new"}}`,
`{"errors": [{"code": 1003, "message":"An A, AAAA or CNAME record already exists with that host"}, {"code": 1004, "message":"Cannot use tunnel as origin for non-proxied load balancer"}], "result": {"cname": "new"}}`,
`{"result": {"cname": "new"}}`,
`{"result": {"cname": "new"}}`,
}
@ -60,8 +60,8 @@ func TestLBRouteUnmarshalResult(t *testing.T) {
badJSON := []string{
`abc`,
`{"success": false, "result": {"pool": "unchanged", "load_balancer": "updated"}}`,
`{"errors": ["foo"], "result": {"pool": "unchanged", "load_balancer": "updated"}}`,
`{"errors": ["foo", "bar"], "result": {"pool": "unchanged", "load_balancer": "updated"}}`,
`{"errors": [{"code": 1003, "message":"An A, AAAA or CNAME record already exists with that host"}], "result": {"pool": "unchanged", "load_balancer": "updated"}}`,
`{"errors": [{"code": 1003, "message":"An A, AAAA or CNAME record already exists with that host"}, {"code": 1004, "message":"Cannot use tunnel as origin for non-proxied load balancer"}], "result": {"pool": "unchanged", "load_balancer": "updated"}}`,
`{"result": {"pool": "unchanged", "load_balancer": "updated"}}`,
}
@ -127,7 +127,7 @@ func Test_parseListTunnels(t *testing.T) {
},
{
name: "errors are present",
args: args{body: `{"errors": ["foo"], "result": []}`},
args: args{body: `{"errors": [{"code": 1003, "message":"An A, AAAA or CNAME record already exists with that host"}], "result": []}`},
wantErr: true,
},
{
@ -197,7 +197,7 @@ func TestUnmarshalTunnelErr(t *testing.T) {
`abc`,
`{"success": true, "result": abc}`,
`{"success": false, "result": {"id": "00000000-0000-0000-0000-000000000000","name":"test","created_at":"0001-01-01T00:00:00Z","connections":[]}}}`,
`{"errors": ["foo"], "result": {"id": "00000000-0000-0000-0000-000000000000","name":"test","created_at":"0001-01-01T00:00:00Z","connections":[]}}}`,
`{"errors": [{"code": 1003, "message":"An A, AAAA or CNAME record already exists with that host"}], "result": {"id": "00000000-0000-0000-0000-000000000000","name":"test","created_at":"0001-01-01T00:00:00Z","connections":[]}}}`,
}
for i, test := range tests {