Aleksey Shakhmatov
3aa7536328
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Six examples covering the full API surface: - basic-client: retry, timeout, logging, response size limit - form-request: form-encoded POST for OAuth/webhooks - load-balancing: weighted endpoints, circuit breaker, health checks - server-basic: routing, groups, JSON helpers, health, custom 404 - server-protected: CORS, rate limiting, body limits, timeouts - request-id-propagation: cross-service request ID forwarding Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
// Demonstrates load balancing across multiple backend endpoints with
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// circuit breaking and health-checked failover.
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package main
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import (
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"context"
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"fmt"
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"log"
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"log/slog"
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"time"
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"git.codelab.vc/pkg/httpx"
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"git.codelab.vc/pkg/httpx/balancer"
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"git.codelab.vc/pkg/httpx/circuitbreaker"
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"git.codelab.vc/pkg/httpx/retry"
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)
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func main() {
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client := httpx.New(
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httpx.WithEndpoints(
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balancer.Endpoint{URL: "http://localhost:8081", Weight: 3},
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balancer.Endpoint{URL: "http://localhost:8082", Weight: 1},
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),
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httpx.WithBalancer(
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balancer.WithStrategy(balancer.WeightedRandom()),
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balancer.WithHealthCheck(
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balancer.WithHealthInterval(5*time.Second),
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balancer.WithHealthPath("/healthz"),
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),
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),
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httpx.WithCircuitBreaker(
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circuitbreaker.WithFailureThreshold(5),
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circuitbreaker.WithOpenDuration(30*time.Second),
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),
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httpx.WithRetry(
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retry.WithMaxAttempts(3),
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),
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httpx.WithLogger(slog.Default()),
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)
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defer client.Close()
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ctx := context.Background()
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for i := range 5 {
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resp, err := client.Get(ctx, fmt.Sprintf("/api/item/%d", i))
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if err != nil {
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log.Printf("request %d failed: %v", i, err)
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continue
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}
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body, _ := resp.String()
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fmt.Printf("request %d → %d: %s\n", i, resp.StatusCode, body)
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}
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}
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