cloud: don't update snapshot interval unless response is from tfe.v2

internal/cloud/state.go

@@ -584,6 +584,13 @@ func clamp(val, min, max int64) int64 {
 }
 
 func (s *State) readSnapshotIntervalHeader(status int, header http.Header) {
+	// Only proceed if this came from tfe.v2 API
+	contentType := header.Get("Content-Type")
+	if !strings.Contains(contentType, tfe.ContentTypeJSONAPI) {
+		log.Printf("[TRACE] Skipping intermediate state interval because Content-Type was %q", contentType)
+		return
+	}
+
 	intervalStr := header.Get(HeaderSnapshotInterval)
 
 	if intervalSecs, err := strconv.ParseInt(intervalStr, 10, 64); err == nil {
@@ -600,6 +607,7 @@ func (s *State) readSnapshotIntervalHeader(status int, header http.Header) {
 	}
 
 	// We will only enable snapshots for intervals greater than zero
+	log.Printf("[TRACE] Intermediate state interval is set by header to %v", s.stateSnapshotInterval)
 	s.enableIntermediateSnapshots = s.stateSnapshotInterval > 0
 }
 

internal/cloud/testing.go

@@ -437,7 +437,7 @@ func testServerWithSnapshotsEnabled(t *testing.T, enabled bool) *httptest.Server
 			t.Fatal(err)
 		}
 
-		w.Header().Set("content-type", "application/json")
+		w.Header().Set("content-type", tfe.ContentTypeJSONAPI)
 		w.Header().Set("content-length", strconv.FormatInt(int64(len(fakeBodyRaw)), 10))
 
 		switch r.Method {