feat(auth): 添加完整的用户认证API项目
- 实现用户注册、登录、JWT令牌认证功能 - 集成Gin、GORM、Viper、Zap等框架 - 添加密码加密、数据库操作、中间件等完整功能 - 配置多环境支持、日志轮转、CORS处理 - 创建完整的项目结构和配置文件体系
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3
go并发模型/03go-select-practice/go.mod
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3
go并发模型/03go-select-practice/go.mod
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module go-select-practice
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go 1.22.2
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go并发模型/03go-select-practice/select_basic.go
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go并发模型/03go-select-practice/select_basic.go
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package main
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import (
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"fmt"
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"time"
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)
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func main() {
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ch1 := make(chan string)
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ch2 := make(chan string)
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// 模拟两个不同来源的“数据源”
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go func() {
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time.Sleep(1 * time.Second)
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ch1 <- "result from ch1 (1s)"
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}()
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go func() {
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time.Sleep(2 * time.Second)
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ch2 <- "result from ch2 (2s)"
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}()
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fmt.Println("等待 ch1 或 ch2 的结果...(谁先来处理谁)")
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select {
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case v := <-ch1:
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fmt.Println("收到 ch1:", v)
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case v := <-ch2:
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fmt.Println("收到 ch2:", v)
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}
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fmt.Println("main 结束")
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}
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go并发模型/03go-select-practice/select_context.go
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go并发模型/03go-select-practice/select_context.go
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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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"time"
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)
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// 模拟一个可被取消的操作
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func doWork(ctx context.Context) error {
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for i := 1; i <= 5; i++ {
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select {
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case <-ctx.Done():
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// context 被取消或超时
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fmt.Println("doWork 被取消:", ctx.Err())
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return ctx.Err()
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default:
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fmt.Println("工作中 step", i)
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time.Sleep(1 * time.Second)
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}
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}
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fmt.Println("doWork 正常完成")
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return nil
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}
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func main() {
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ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
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defer cancel()
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fmt.Println("开始工作,最长 3 秒...")
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if err := doWork(ctx); err != nil {
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fmt.Println("结束,原因:", err)
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return
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}
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fmt.Println("结束: 正常完成")
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}
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go并发模型/03go-select-practice/select_default.go
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go并发模型/03go-select-practice/select_default.go
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package main
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import (
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"fmt"
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"time"
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)
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func main() {
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ch := make(chan int)
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go func() {
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for i := 1; i <= 5; i++ {
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time.Sleep(500 * time.Millisecond)
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ch <- i
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}
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close(ch)
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}()
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for {
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select {
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case v, ok := <-ch:
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if !ok {
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fmt.Println("channel 已关闭,退出循环")
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return
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}
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fmt.Println("收到:", v)
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default:
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// 没有数据可读时,做点“其他事”
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fmt.Println("没有新数据,先忙点别的...")
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time.Sleep(200 * time.Millisecond)
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}
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}
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}
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go并发模型/03go-select-practice/select_timeout.go
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go并发模型/03go-select-practice/select_timeout.go
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package main
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import (
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"errors"
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"fmt"
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"time"
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)
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// 模拟一个可能很慢的操作
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func slowOperation() (string, error) {
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time.Sleep(3 * time.Second) // 假设真的很慢
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return "slow result", nil
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}
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func doWithTimeout(timeout time.Duration) (string, error) {
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resultCh := make(chan string, 1)
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errCh := make(chan error, 1)
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go func() {
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res, err := slowOperation()
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if err != nil {
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errCh <- err
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return
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}
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resultCh <- res
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}()
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select {
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case res := <-resultCh:
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return res, nil
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case err := <-errCh:
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return "", err
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case <-time.After(timeout):
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return "", errors.New("操作超时")
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}
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}
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func main() {
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fmt.Println("开始调用,最大等待 2 秒...")
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res, err := doWithTimeout(2 * time.Second)
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if err != nil {
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fmt.Println("失败:", err)
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return
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}
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fmt.Println("成功:", res)
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}
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