feat: initial goget release — modern IPv6-first download utility

internal/core/context.go

@@ -0,0 +1,65 @@
+//go:build linux || freebsd
+// +build linux freebsd
+
+package core
+
+import (
+	"context"
+	"time"
+)
+
+// RequestContext holds metadata about the request across layers
+type RequestContext struct {
+	// Request ID for logging
+	RequestID string
+
+	// Start of operation
+	StartTime time.Time
+
+	// Protocols used in the chain
+	ProtocolChain []string
+
+	// IP address to which was connected
+	ConnectedIP string
+
+	// IP version (4 or 6)
+	IPVersion int
+
+	// Number of attempts
+	AttemptCount int
+
+	// Context for cancellation
+	Context context.Context
+}
+
+// NewRequestContext creates a new request context
+func NewRequestContext(ctx context.Context, requestID string) *RequestContext {
+	return &RequestContext{
+		RequestID:     requestID,
+		StartTime:     time.Now(),
+		ProtocolChain: make([]string, 0),
+		IPVersion:     0,
+		AttemptCount:  0,
+		Context:       ctx,
+	}
+}
+
+// Duration returns the duration of operation
+func (rc *RequestContext) Duration() time.Duration {
+	return time.Since(rc.StartTime)
+}
+
+// AddProtocol adds a protocol to the chain
+func (rc *RequestContext) AddProtocol(protocol string) {
+	rc.ProtocolChain = append(rc.ProtocolChain, protocol)
+}
+
+// IsCancelled returns whether the context was cancelled
+func (rc *RequestContext) IsCancelled() bool {
+	select {
+	case <-rc.Context.Done():
+		return true
+	default:
+		return false
+	}
+}