codesnips
go 
package auth

import "golang.org/x/crypto/bcrypt"

func HashPassword(pw string, cost int) ([]byte, error) {
  if cost == 0 {

Password hashing with bcrypt and a calibrated cost

go security auth
by Leah Thompson 1 tab
go 
package config

import (
  "errors"
  "os"
  "strconv"

Config parsing with env defaults and strict validation

go config reliability
by Leah Thompson 1 tab
go 
package api

import (
  "encoding/json"
  "net/http"
)

Consistent JSON responses (content-type + error envelopes)

go http json
by Leah Thompson 1 tab
go 
package api

import "net/http"

func ETag(w http.ResponseWriter, r *http.Request, etag string) bool {
  w.Header().Set("ETag", etag)

ETag handling for conditional GETs (cheap caching)

go http caching
by Leah Thompson 1 tab
go 
package realtime

import (
  "fmt"
  "net/http"
  "time"

Server-Sent Events (SSE) with heartbeats and client cleanup

go http sse
by Leah Thompson 1 tab
go 
package limit

import (
  "context"

  "golang.org/x/sync/semaphore"

Concurrency limiting with a context-aware semaphore

go concurrency context
by Leah Thompson 1 tab
go 
package deps

import (
  "context"
  "net/http"
  "time"

Circuit breaker around flaky dependencies

go reliability circuit-breaker
by Leah Thompson 1 tab
go 
package main

import (
  "context"
  "net/http"
  "time"

HTTP server timeouts that prevent slowloris and stuck connections

go http reliability
by Leah Thompson 1 tab
go 
package store

import (
  "context"

  sq "github.com/Masterminds/squirrel"

Safe dynamic SQL with squirrel (optional filters, stable ordering)

go sql postgres
by Leah Thompson 1 tab
go 
package store

import (
  "context"
  "time"

pgxpool initialization with max connections and statement timeout

go postgres pgx
by Leah Thompson 1 tab
go 
package metrics

import (
  "net/http"
  "strconv"
  "time"

Prometheus metrics middleware capturing status + duration

go prometheus metrics
by Leah Thompson 1 tab
go 
package observability

import (
  "context"

  "go.opentelemetry.io/otel"

OpenTelemetry tracer provider with ratio-based sampling

go observability opentelemetry
by Leah Thompson 1 tab