POST record with id to update to fix cloudflare 500

adapters/external_dns/cloudflare/cloudflare.go

@@ -21,15 +21,11 @@ type CloudflareExternalDNSAdapter struct {
 
 func (adapter *CloudflareExternalDNSAdapter) CreateDNSRecord(record *database.DNSRecord) (string, error) {
 	url := fmt.Sprintf("https://api.cloudflare.com/client/v4/zones/%s/dns_records", adapter.ZoneId)
-
-	reqBody := fmt.Sprintf(`{"type":"%s","name":"%s","content":"%s","ttl":%d,"proxied":false}`, record.Type, record.Name, record.Content, record.TTL)
-	payload := strings.NewReader(reqBody)
+	payload := strings.NewReader(encodeDNSRecord(record))
 
 	req, _ := http.NewRequest("POST", url, payload)
-
 	req.Header.Add("Authorization", "Bearer "+adapter.APIToken)
 	req.Header.Add("Content-Type", "application/json")
-
 	res, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return "", err
@@ -53,6 +49,27 @@ func (adapter *CloudflareExternalDNSAdapter) CreateDNSRecord(record *database.DN
 	return result.ID, nil
 }
 
+func (adapter *CloudflareExternalDNSAdapter) UpdateDNSRecord(record *database.DNSRecord) error {
+	url := fmt.Sprintf("https://api.cloudflare.com/client/v4/zones/%s/dns_records/%s", adapter.ZoneId, record.ID)
+	payload := strings.NewReader(encodeDNSRecord(record))
+
+	req, _ := http.NewRequest("PUT", url, payload)
+	req.Header.Add("Authorization", "Bearer "+adapter.APIToken)
+	req.Header.Add("Content-Type", "application/json")
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return err
+	}
+
+	defer res.Body.Close()
+	body, _ := io.ReadAll(res.Body)
+	if res.StatusCode != 200 {
+		return fmt.Errorf("error updating dns record: %s", body)
+	}
+
+	return nil
+}
+
 func (adapter *CloudflareExternalDNSAdapter) DeleteDNSRecord(id string) error {
 	url := fmt.Sprintf("https://api.cloudflare.com/client/v4/zones/%s/dns_records/%s", adapter.ZoneId, id)
 
@@ -74,3 +91,7 @@ func (adapter *CloudflareExternalDNSAdapter) DeleteDNSRecord(id string) error {
 
 	return nil
 }
+
+func encodeDNSRecord(record *database.DNSRecord) string {
+	return fmt.Sprintf(`{"type":"%s","name":"%s","content":"%s","ttl":%d,"proxied":false}`, record.Type, record.Name, record.Content, record.TTL)
+}

adapters/external_dns/external_dns.go

@@ -4,5 +4,6 @@ import "git.hatecomputers.club/hatecomputers/hatecomputers.club/database"
 
 type ExternalDNSAdapter interface {
 	CreateDNSRecord(record *database.DNSRecord) (string, error)
+	UpdateDNSRecord(record *database.DNSRecord) error
 	DeleteDNSRecord(id string) error
 }

api/dns/dns.go

@@ -36,29 +36,48 @@ func ListDNSRecordsContinuation(context *types.RequestContext, req *http.Request
 	}
 }
 
-func CreateDNSRecordContinuation(dnsAdapter external_dns.ExternalDNSAdapter, maxUserRecords int, allowedUserDomainFormats []string) func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
+func CreateDNSRecordContinuation(externalDnsAdapter external_dns.ExternalDNSAdapter, maxUserRecords int, allowedUserDomainFormats []string) func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
 	return func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
 		return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
 			formErrors := types.BannerMessages{
 				Messages: []string{},
 			}
 
-			internal := req.FormValue("internal") == "on" || req.FormValue("internal") == "true"
-			name := req.FormValue("name")
-			if internal && !strings.HasSuffix(name, ".") {
-				name += "."
+			dnsRecord := &database.DNSRecord{}
+			id := req.FormValue("id")
+			isNewRecord := id == ""
+			if !isNewRecord {
+				retrievedDnsRecord, err := database.GetDNSRecord(context.DBConn, id)
+				if err != nil {
+					log.Println(err)
+					resp.WriteHeader(http.StatusInternalServerError)
+					formErrors.Messages = append(formErrors.Messages, "error getting record from id")
+				} else {
+					dnsRecord = retrievedDnsRecord
+				}
+			} else {
+				dnsRecord.UserID = context.User.ID
+			}
+
+			dnsRecord.Internal = req.FormValue("internal") == "on" || req.FormValue("internal") == "true"
+
+			dnsRecord.Name = req.FormValue("name")
+			if dnsRecord.Internal && !strings.HasSuffix(dnsRecord.Name, ".") {
+				dnsRecord.Name += "."
 			}
 
 			recordType := req.FormValue("type")
-			recordType = strings.ToUpper(recordType)
+			dnsRecord.Type = strings.ToUpper(recordType)
+
+			dnsRecord.Content = req.FormValue("content")
 
-			recordContent := req.FormValue("content")
 			ttl := req.FormValue("ttl")
 			ttlNum, err := strconv.Atoi(ttl)
 			if err != nil {
 				resp.WriteHeader(http.StatusBadRequest)
 				formErrors.Messages = append(formErrors.Messages, "invalid ttl")
 			}
+			dnsRecord.TTL = ttlNum
 
 			dnsRecordCount, err := database.CountUserDNSRecords(context.DBConn, context.User.ID)
 			if err != nil {
@@ -71,27 +90,29 @@ func CreateDNSRecordContinuation(dnsAdapter external_dns.ExternalDNSAdapter, max
 				formErrors.Messages = append(formErrors.Messages, "max records reached")
 			}
 
-			dnsRecord := &database.DNSRecord{
-				UserID:   context.User.ID,
-				Name:     name,
-				Type:     recordType,
-				Content:  recordContent,
-				TTL:      ttlNum,
-				Internal: internal,
-			}
-
-			if !userCanFuckWithDNSRecord(context.DBConn, context.User, dnsRecord, allowedUserDomainFormats) {
+			if len(formErrors.Messages) == 0 && !userCanFuckWithDNSRecord(context.DBConn, context.User, dnsRecord, allowedUserDomainFormats) {
 				resp.WriteHeader(http.StatusUnauthorized)
-				formErrors.Messages = append(formErrors.Messages, "'name' must end with "+context.User.Username+" or you must be a domain owner for internal domains")
+				formErrors.Messages = append(formErrors.Messages, "external 'name' must end with "+context.User.Username+" or you must be a domain owner for internal domains")
 			}
 
-			if len(formErrors.Messages) == 0 {
+			if isNewRecord && len(formErrors.Messages) == 0 {
 				if dnsRecord.Internal {
 					dnsRecord.ID = utils.RandomId()
 				} else {
-					dnsRecord.ID, err = dnsAdapter.CreateDNSRecord(dnsRecord)
+					dnsRecord.ID, err = externalDnsAdapter.CreateDNSRecord(dnsRecord)
 					if err != nil {
-						log.Println(err)
+						log.Println("error creating external dns record", err)
+						resp.WriteHeader(http.StatusInternalServerError)
+						formErrors.Messages = append(formErrors.Messages, err.Error())
+					}
+				}
+			}
+
+			if !isNewRecord && len(formErrors.Messages) == 0 {
+				if !dnsRecord.Internal {
+					err = externalDnsAdapter.UpdateDNSRecord(dnsRecord)
+					if err != nil {
+						log.Println("error updating external dns record", err)
 						resp.WriteHeader(http.StatusInternalServerError)
 						formErrors.Messages = append(formErrors.Messages, err.Error())
 					}
@@ -108,20 +129,21 @@ func CreateDNSRecordContinuation(dnsAdapter external_dns.ExternalDNSAdapter, max
 
 			if len(formErrors.Messages) == 0 {
 				formSuccess := types.BannerMessages{
-					Messages: []string{"record added."},
+					Messages: []string{"record saved."},
 				}
 				(*context.TemplateData)["Success"] = formSuccess
 				return success(context, req, resp)
 			}
 
-			(*context.TemplateData)[""] = &formErrors
+			log.Println(formErrors.Messages)
+			(*context.TemplateData)["Error"] = &formErrors
 			(*context.TemplateData)["RecordForm"] = dnsRecord
 			return failure(context, req, resp)
 		}
 	}
 }
 
-func DeleteDNSRecordContinuation(dnsAdapter external_dns.ExternalDNSAdapter) func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
+func DeleteDNSRecordContinuation(externalDnsAdapter external_dns.ExternalDNSAdapter) func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
 	return func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
 		return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
 			recordId := req.FormValue("id")
@@ -138,7 +160,7 @@ func DeleteDNSRecordContinuation(dnsAdapter external_dns.ExternalDNSAdapter) fun
 			}
 
 			if !record.Internal {
-				err = dnsAdapter.DeleteDNSRecord(recordId)
+				err = externalDnsAdapter.DeleteDNSRecord(recordId)
 				if err != nil {
 					log.Println(err)
 					resp.WriteHeader(http.StatusInternalServerError)

api/dns/dns_test.go

@@ -57,6 +57,7 @@ func setup() (*sql.DB, *types.RequestContext, func()) {
 type SignallingExternalDnsAdapter struct {
 	AddChannel chan *database.DNSRecord
 	RmChannel  chan string
+	UpdateChan chan *database.DNSRecord
 }
 
 func (adapter *SignallingExternalDnsAdapter) CreateDNSRecord(record *database.DNSRecord) (string, error) {
@@ -72,6 +73,12 @@ func (adapter *SignallingExternalDnsAdapter) DeleteDNSRecord(id string) error {
 	return nil
 }
 
+func (adapter *SignallingExternalDnsAdapter) UpdateDNSRecord(record *database.DNSRecord) error {
+	go func() { adapter.UpdateChan <- record }()
+
+	return nil
+}
+
 func TestThatOwnerCanPutRecordInDomain(t *testing.T) {
 	db, context, cleanup := setup()
 	defer cleanup()
@@ -172,6 +179,73 @@ func TestThatUserCanAddToPublicEndpoints(t *testing.T) {
 	}
 }
 
+func TestThatUserCanUpdateExistingRecord(t *testing.T) {
+	db, context, cleanup := setup()
+	defer cleanup()
+
+	updateChannel := make(chan *database.DNSRecord)
+	signallingDnsAdapter := &SignallingExternalDnsAdapter{
+		UpdateChan: updateChannel,
+	}
+
+	testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		dns.CreateDNSRecordContinuation(signallingDnsAdapter, MAX_USER_RECORDS, USER_OWNED_INTERNAL_FMT_DOMAINS)(context, r, w)(IdContinuation, IdContinuation)
+	}))
+	defer testServer.Close()
+
+	responseRecorder := httptest.NewRecorder()
+	nonexistantRecord := httptest.NewRequest("POST", testServer.URL, nil)
+
+	id := "1"
+	name := "test." + context.User.Username
+	nonexistantRecord.Form = map[string][]string{
+		"id":       {id},
+		"internal": {"off"},
+		"name":     {name},
+		"type":     {"CNAME"},
+		"ttl":      {"43000"},
+		"content":  {"new.domain."},
+	}
+
+	testServer.Config.Handler.ServeHTTP(responseRecorder, nonexistantRecord)
+	if responseRecorder.Code != http.StatusInternalServerError {
+		t.Errorf("expected internal server error return, got %d", responseRecorder.Code)
+	}
+
+	record := &database.DNSRecord{
+		ID:       id,
+		Internal: false,
+		Name:     name,
+		Type:     "CNAME",
+		Content:  "test.domain.",
+		TTL:      43000,
+		UserID:   context.User.ID,
+	}
+	_, err := database.SaveDNSRecord(db, record)
+	if err != nil {
+		t.Error(err)
+	}
+
+	existantRecord := nonexistantRecord
+	existantRecordRecorder := httptest.NewRecorder()
+	testServer.Config.Handler.ServeHTTP(existantRecordRecorder, existantRecord)
+	if existantRecordRecorder.Code != http.StatusOK {
+		t.Errorf("expected valid return, got %d", existantRecordRecorder.Code)
+	}
+	select {
+	case req := <-updateChannel:
+		newRecord, err := database.GetDNSRecord(db, req.ID)
+		if err != nil {
+			t.Error(err)
+		}
+		if newRecord.Content != "new.domain." {
+			t.Errorf("expected updated record, got %s", newRecord.Content)
+		}
+	case <-time.After(100 * time.Millisecond):
+		t.Errorf("expected updated record channel")
+	}
+}
+
 func TestThatExternalDnsSaves(t *testing.T) {
 	db, context, cleanup := setup()
 	defer cleanup()

api/template/template.go

@@ -46,7 +46,7 @@ func renderTemplate(context *types.RequestContext, templateName string, showBase
 func TemplateContinuation(path string, showBase bool) types.Continuation {
 	return func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
 		return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
-			html, err := renderTemplate(context, path, true)
+			html, err := renderTemplate(context, path, showBase)
 			if errors.Is(err, os.ErrNotExist) {
 				resp.WriteHeader(404)
 				html, err = renderTemplate(context, "404.html", true)