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chore(federated): display a message when nodes are not available (#3721)
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
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parent
b5115903bf
commit
d06a052d54
@ -7,6 +7,7 @@ import (
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"context"
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"errors"
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"fmt"
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"io"
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"net"
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"github.com/mudler/edgevpn/pkg/node"
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@ -41,7 +42,7 @@ func (fs *FederatedServer) proxy(ctx context.Context, node *node.Node) error {
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log.Error().Err(err).Msg("Error listening")
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return err
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}
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// ll.Info("Binding local port on", srcaddr)
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go func() {
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<-ctx.Done()
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l.Close()
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@ -82,6 +83,7 @@ func (fs *FederatedServer) proxy(ctx context.Context, node *node.Node) error {
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if workerID == "" {
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log.Error().Msg("No available nodes yet")
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fs.sendHTMLResponse(conn, 503, "Sorry, waiting for nodes to connect")
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return
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}
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@ -89,6 +91,7 @@ func (fs *FederatedServer) proxy(ctx context.Context, node *node.Node) error {
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nodeData, exists := GetNode(fs.service, workerID)
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if !exists {
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log.Error().Msgf("Node %s not found", workerID)
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fs.sendHTMLResponse(conn, 404, "Node not found")
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return
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}
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@ -100,3 +103,42 @@ func (fs *FederatedServer) proxy(ctx context.Context, node *node.Node) error {
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}
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}
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}
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// sendHTMLResponse sends a basic HTML response with a status code and a message.
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// This is extracted to make the HTML content maintainable.
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func (fs *FederatedServer) sendHTMLResponse(conn net.Conn, statusCode int, message string) {
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defer conn.Close()
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// Define the HTML content separately for easier maintenance.
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htmlContent := fmt.Sprintf("<html><body><h1>%s</h1></body></html>\r\n", message)
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// Create the HTTP response with dynamic status code and content.
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response := fmt.Sprintf(
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"HTTP/1.1 %d %s\r\n"+
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"Content-Type: text/html\r\n"+
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"Connection: close\r\n"+
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"\r\n"+
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"%s",
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statusCode, getHTTPStatusText(statusCode), htmlContent,
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)
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// Write the response to the client connection.
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_, writeErr := io.WriteString(conn, response)
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if writeErr != nil {
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log.Error().Err(writeErr).Msg("Error writing response to client")
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}
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}
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// getHTTPStatusText returns a textual representation of HTTP status codes.
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func getHTTPStatusText(statusCode int) string {
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switch statusCode {
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case 503:
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return "Service Unavailable"
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case 404:
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return "Not Found"
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case 200:
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return "OK"
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default:
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return "Unknown Status"
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}
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}
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