alexei.dolgolyov
7a85441b81
Add standalone proxy management: - Multi-step validation pipeline (DNS, TCP, HTTP) with diagnostic hints - Proxy lifecycle: create/update/delete via NPM API with SSL auto-assign - Periodic health monitoring (5min) with event log on status transitions - Unified /api/proxies/all endpoint merging standalone + managed proxies - Frontend types and API functions for downstream UI phases
75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
package proxy
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import (
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"errors"
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"fmt"
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"net"
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"strings"
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)
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// diagnosticHint returns a user-friendly suggestion for a validation failure.
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func diagnosticHint(step string, err error) string {
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if err == nil {
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return ""
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}
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switch step {
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case StepDNS:
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return "Domain cannot be resolved. Check DNS settings or use an IP address."
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case StepTCP:
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return tcpHintFromError(err)
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case StepHTTP:
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return httpHint(err.Error())
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default:
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return "Validation failed: " + err.Error()
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}
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}
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// tcpHintFromError returns a specific hint based on the TCP error type.
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func tcpHintFromError(err error) string {
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if err == nil {
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return ""
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}
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var opErr *net.OpError
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if errors.As(err, &opErr) {
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lower := strings.ToLower(opErr.Err.Error())
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switch {
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case strings.Contains(lower, "connection refused"):
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return "Port is not accepting connections. Check if the service is running and the port is correct."
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case strings.Contains(lower, "i/o timeout") || strings.Contains(lower, "timeout"):
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return "Connection timed out. Possible firewall blocking. Check network/firewall rules."
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case strings.Contains(lower, "no route to host") || strings.Contains(lower, "host is unreachable"):
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return "Host is not reachable. Verify the IP address and network connectivity."
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}
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}
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msg := err.Error()
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lower := strings.ToLower(msg)
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switch {
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case strings.Contains(lower, "connection refused"):
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return "Port is not accepting connections. Check if the service is running and the port is correct."
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case strings.Contains(lower, "timeout"):
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return "Connection timed out. Possible firewall blocking. Check network/firewall rules."
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default:
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return fmt.Sprintf("TCP connection failed: %s", msg)
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}
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}
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// httpHint returns a specific hint based on the HTTP probe result.
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func httpHint(msg string) string {
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lower := strings.ToLower(msg)
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switch {
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case strings.Contains(lower, "status"):
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return msg // Already formatted by the caller with the status code.
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case strings.Contains(lower, "timeout"):
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return "HTTP health probe timed out. The service may be slow or unresponsive."
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default:
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return "HTTP health probe failed: " + msg
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}
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}
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