feat: 分片上传断点续传、临时目录后台配置与清扫、宇恒云账号管理

- 管理端大文件分片上传与 sessionStorage 续传；Nginx 大请求体/超时
- .chunk-uploads 定期清扫；system_config 后台配置保留时长与扫描间隔
- 宇恒云 POST /register 对接与 yuheng_cloud_register_records 留痕；yuheng_cloud:manage 权限

Made-with: Cursor

server/handlers/yuheng_cloud_register.go

@@ -0,0 +1,182 @@
+package handlers
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"yh_web/server/config"
+	"yh_web/server/models"
+
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+const yuhengCloudRegisterColl = "yuheng_cloud_register_records"
+
+func cloudRegisterURL() string {
+	u := strings.TrimSpace(os.Getenv("YH_CLOUD_REGISTER_URL"))
+	if u != "" {
+		return strings.TrimSuffix(u, "/")
+	}
+	return "http://www.cloud.yuxindazhineng.com:3001/register"
+}
+
+// YuhengCloudRegisterInput 与云端 POST /register 一致；email 仅用于调用云端，不写入 Mongo
+type YuhengCloudRegisterInput struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+	Email    string `json:"email" binding:"required"`
+}
+
+type cloudRegisterPayload struct {
+	Username string `json:"username"`
+	Password string `json:"password"`
+	Email    string `json:"email"`
+}
+
+func postCloudRegister(ctx context.Context, payload cloudRegisterPayload) (int, string, error) {
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return 0, "", err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, cloudRegisterURL(), bytes.NewReader(body))
+	if err != nil {
+		return 0, "", err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	client := &http.Client{Timeout: 45 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return 0, "", err
+	}
+	defer resp.Body.Close()
+	b, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
+	return resp.StatusCode, strings.TrimSpace(string(b)), nil
+}
+
+// CreateYuhengCloudRegister 调用云端注册接口，成功后在 Mongo 写入一条记录（仅 username、password）
+func CreateYuhengCloudRegister(c *gin.Context) {
+	var in YuhengCloudRegisterInput
+	if err := c.ShouldBindJSON(&in); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请填写用户名、密码与邮箱（邮箱仅提交云端）"})
+		return
+	}
+	in.Username = strings.TrimSpace(in.Username)
+	in.Password = strings.TrimSpace(in.Password)
+	in.Email = strings.TrimSpace(in.Email)
+	if in.Username == "" || in.Password == "" || in.Email == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "用户名、密码、邮箱不能为空"})
+		return
+	}
+
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 50*time.Second)
+	defer cancel()
+
+	status, bodySnippet, err := postCloudRegister(ctx, cloudRegisterPayload{
+		Username: in.Username,
+		Password: in.Password,
+		Email:    in.Email,
+	})
+	if err != nil {
+		c.JSON(http.StatusBadGateway, gin.H{"error": "调用云端注册失败: " + err.Error()})
+		return
+	}
+	if status < 200 || status >= 300 {
+		msg := bodySnippet
+		if len(msg) > 500 {
+			msg = msg[:500] + "…"
+		}
+		if msg == "" {
+			msg = http.StatusText(status)
+		}
+		c.JSON(http.StatusBadGateway, gin.H{"error": fmt.Sprintf("云端返回 %d: %s", status, msg)})
+		return
+	}
+
+	db := config.GetDB(config.DBName)
+	if db == nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "数据库未连接，未写入本地记录"})
+		return
+	}
+	insCtx, insCancel := context.WithTimeout(context.Background(), 8*time.Second)
+	defer insCancel()
+	doc := bson.M{
+		"username":   in.Username,
+		"password":   in.Password,
+		"created_at": time.Now().UTC().Format(time.RFC3339),
+	}
+	res, err := db.Collection(yuhengCloudRegisterColl).InsertOne(insCtx, doc)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "云端已成功但本地记录失败: " + err.Error()})
+		return
+	}
+	idHex := ""
+	switch v := res.InsertedID.(type) {
+	case bson.ObjectID:
+		idHex = v.Hex()
+	}
+	c.JSON(http.StatusOK, gin.H{"id": idHex, "message": "已提交云端注册并写入本地记录"})
+}
+
+// ListYuhengCloudRegisterRecords 分页列出本地留痕（便于管理页展示）
+func ListYuhengCloudRegisterRecords(c *gin.Context) {
+	db := config.GetDB(config.DBName)
+	if db == nil {
+		c.JSON(http.StatusOK, gin.H{"list": []any{}, "total": 0})
+		return
+	}
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 || pageSize > 100 {
+		pageSize = 20
+	}
+	skip := int64((page - 1) * pageSize)
+	limit := int64(pageSize)
+
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
+	defer cancel()
+	coll := db.Collection(yuhengCloudRegisterColl)
+	total, err := coll.CountDocuments(ctx, bson.M{})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	opts := options.Find().SetSort(bson.D{{Key: "created_at", Value: -1}}).SetSkip(skip).SetLimit(limit)
+	cur, err := coll.Find(ctx, bson.M{}, opts)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	defer cur.Close(ctx)
+	var list []models.YuhengCloudRegisterRecord
+	for cur.Next(ctx) {
+		var row struct {
+			ID        bson.ObjectID `bson:"_id"`
+			Username  string        `bson:"username"`
+			Password  string        `bson:"password"`
+			CreatedAt string        `bson:"created_at"`
+		}
+		if err := cur.Decode(&row); err != nil {
+			continue
+		}
+		list = append(list, models.YuhengCloudRegisterRecord{
+			ID:        row.ID.Hex(),
+			Username:  row.Username,
+			Password:  row.Password,
+			CreatedAt: row.CreatedAt,
+		})
+	}
+	c.JSON(http.StatusOK, gin.H{"list": list, "total": total})
+}