refactor: 重构代码架构并使用 Modern Go 特性

- 重命名模块 jwts -> schedule_converter
- 新增 service 包，统一业务逻辑层
- 新增 pkg/logger 包，使用 slog 结构化日志
- 新增 pkg/errors 包，统一错误处理
- 拆分 captcha 包，图片识别移至 service/recognizer
- 清理 models 包，只保留数据结构定义
- 消除 grpc/handler.go 中的重复代码
- 简化 main.go，使用 slog 和 context
- 配置支持单例模式和结构化配置
- 使用 any 替代 interface{}
- 使用 sync.Map 替代 map + RWMutex

client/http.go

@@ -1,36 +1,40 @@
 package client
 
 import (
-	"fmt"
-	"log"
+	"log/slog"
 	"net/http"
 	"net/http/cookiejar"
 	"net/url"
 	"strings"
-	"time"
+	"sync"
 
-	"jwts/config"
+	"schedule_converter/config"
 )
 
-var Client *http.Client
-
-var RecognizerClient *http.Client
+var (
+	Client           *http.Client
+	RecognizerClient *http.Client
+	once             sync.Once
+)
 
 func InitClient() {
-	jar, err := cookiejar.New(nil)
-	if err != nil {
-		log.Fatalf("Failed to create cookie jar: %v", err)
-	}
-	Client = &http.Client{
-		Jar: jar,
-	}
+	once.Do(func() {
+		jar, err := cookiejar.New(nil)
+		if err != nil {
+			slog.Error("创建 cookie jar 失败", "error", err)
+			panic(err)
+		}
+		Client = &http.Client{Jar: jar}
 
-	RecognizerClient = &http.Client{
-		Timeout: 120 * time.Second,
-	}
+		cfg := config.Get()
+		RecognizerClient = &http.Client{
+			Timeout: cfg.Recognizer.Timeout,
+		}
+
+		slog.Info("HTTP 客户端初始化完成")
+	})
 }
 
-// 设置请求头
 func GetHeaders() http.Header {
 	return http.Header{
 		"User-Agent":      []string{"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"},
@@ -39,56 +43,58 @@ func GetHeaders() http.Header {
 	}
 }
 
-// 获取带Content-Type的请求头
 func GetHeadersWithContentType(contentType string) http.Header {
 	headers := GetHeaders()
-	headers["Content-Type"] = []string{contentType}
+	headers.Set("Content-Type", contentType)
 	return headers
 }
 
-// 步骤1: 获取初始Cookie
 func GetInitialCookies() error {
-	fmt.Println("[1] 访问登录页面获取初始Cookie...")
+	return GetInitialCookiesWithClient(Client)
+}
 
-	req, err := http.NewRequest("GET", config.BaseURL+"/loginNOCAS", nil)
+func GetInitialCookiesWithClient(httpClient *http.Client) error {
+	slog.Info("访问登录页面获取初始Cookie")
+
+	cfg := config.Get()
+	req, err := http.NewRequest("GET", cfg.BaseURL+"/loginNOCAS", nil)
 	if err != nil {
 		return err
 	}
 	req.Header = GetHeaders()
 
-	resp, err := Client.Do(req)
+	resp, err := httpClient.Do(req)
 	if err != nil {
 		return err
 	}
 	defer resp.Body.Close()
 
-	fmt.Printf("    登录页面状态码: %d\n", resp.StatusCode)
-	PrintCookies()
+	slog.Info("登录页面访问完成", "status_code", resp.StatusCode)
+	logCookies(httpClient)
 
 	return nil
 }
 
-// 打印Cookies
-func PrintCookies() {
-	fmt.Printf("    当前Cookies: ")
-	for _, cookie := range Client.Jar.Cookies(parseURL(config.BaseURL)) {
-		fmt.Printf("%s=%s; ", cookie.Name, cookie.Value)
+func logCookies(httpClient *http.Client) {
+	cfg := config.Get()
+	cookies := httpClient.Jar.Cookies(parseURL(cfg.BaseURL))
+
+	var cookieStrs []string
+	for _, cookie := range cookies {
+		cookieStrs = append(cookieStrs, cookie.Name+"="+cookie.Value)
 	}
-	fmt.Println()
+	slog.Debug("当前Cookies", "cookies", strings.Join(cookieStrs, "; "))
 }
 
-// 解析URL
 func parseURL(rawURL string) *url.URL {
 	u, _ := url.Parse(rawURL)
 	return u
 }
 
-// 检查登录是否成功
 func CheckLoginSuccess(body string) bool {
 	return strings.Contains(body, "本科教学管理服务系统")
 }
 
-// 检查是否验证码错误
 func IsCaptchaError(body string) bool {
 	return strings.Contains(body, "验证码")
 }