mirror of
https://github.com/DullJZ/s3-balance.git
synced 2026-07-14 00:41:48 +08:00
393 lines
10 KiB
Go
393 lines
10 KiB
Go
package api
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import (
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"context"
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"encoding/json"
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"log"
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"net/http"
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"strconv"
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"time"
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"github.com/DullJZ/s3-balance/internal/balancer"
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"github.com/DullJZ/s3-balance/internal/bucket"
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"github.com/DullJZ/s3-balance/internal/storage"
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"github.com/DullJZ/s3-balance/pkg/presigner"
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"github.com/gorilla/mux"
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)
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// Handler API处理器
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type Handler struct {
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bucketManager *bucket.Manager
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balancer *balancer.Balancer
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presigner *presigner.Presigner
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storage *storage.Service
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}
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// NewHandler 创建新的API处理器
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func NewHandler(
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bucketManager *bucket.Manager,
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balancer *balancer.Balancer,
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presigner *presigner.Presigner,
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storage *storage.Service,
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) *Handler {
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return &Handler{
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bucketManager: bucketManager,
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balancer: balancer,
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presigner: presigner,
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storage: storage,
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}
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}
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// RegisterRoutes 注册路由
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func (h *Handler) RegisterRoutes(router *mux.Router) {
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// 健康检查
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router.HandleFunc("/health", h.handleHealth).Methods("GET")
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// 存储桶状态
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router.HandleFunc("/api/v1/buckets", h.handleListBuckets).Methods("GET")
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router.HandleFunc("/api/v1/buckets/{bucket}/stats", h.handleBucketStats).Methods("GET")
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// 预签名URL生成
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router.HandleFunc("/api/v1/presign/upload", h.handlePresignUpload).Methods("POST")
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router.HandleFunc("/api/v1/presign/download", h.handlePresignDownload).Methods("POST")
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router.HandleFunc("/api/v1/presign/delete", h.handlePresignDelete).Methods("POST")
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router.HandleFunc("/api/v1/presign/multipart", h.handlePresignMultipart).Methods("POST")
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// 对象操作（记录元数据）
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router.HandleFunc("/api/v1/objects", h.handleListObjects).Methods("GET")
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router.HandleFunc("/api/v1/objects/{key:.*}", h.handleGetObjectInfo).Methods("GET")
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router.HandleFunc("/api/v1/objects/{key:.*}", h.handleDeleteObject).Methods("DELETE")
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}
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// 健康检查
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func (h *Handler) handleHealth(w http.ResponseWriter, r *http.Request) {
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response := map[string]interface{}{
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"status": "healthy",
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"time": time.Now().Unix(),
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}
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h.sendJSON(w, http.StatusOK, response)
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}
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// 列出所有存储桶状态
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func (h *Handler) handleListBuckets(w http.ResponseWriter, r *http.Request) {
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buckets := h.bucketManager.GetAllBuckets()
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var bucketList []map[string]interface{}
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for _, b := range buckets {
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bucketList = append(bucketList, map[string]interface{}{
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"name": b.Config.Name,
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"endpoint": b.Config.Endpoint,
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"region": b.Config.Region,
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"max_size": b.Config.MaxSize,
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"max_size_bytes": b.Config.MaxSizeBytes,
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"used_size": b.GetUsedSize(),
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"available": b.IsAvailable(),
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"weight": b.Config.Weight,
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"enabled": b.Config.Enabled,
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})
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}
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h.sendJSON(w, http.StatusOK, map[string]interface{}{
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"buckets": bucketList,
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"strategy": h.balancer.GetStrategy(),
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})
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}
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// 获取单个存储桶统计
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func (h *Handler) handleBucketStats(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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bucketName := vars["bucket"]
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bucket, ok := h.bucketManager.GetBucket(bucketName)
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if !ok {
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h.sendError(w, http.StatusNotFound, "bucket not found")
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return
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}
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stats := map[string]interface{}{
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"name": bucket.Config.Name,
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"max_size_bytes": bucket.Config.MaxSizeBytes,
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"used_size": bucket.GetUsedSize(),
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"available_space": bucket.GetAvailableSpace(),
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"available": bucket.IsAvailable(),
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"last_checked": bucket.LastChecked,
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}
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h.sendJSON(w, http.StatusOK, stats)
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}
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// PresignUploadRequest 上传预签名请求
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type PresignUploadRequest struct {
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Key string `json:"key"`
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Size int64 `json:"size"`
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ContentType string `json:"content_type,omitempty"`
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Metadata map[string]string `json:"metadata,omitempty"`
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}
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// 生成上传预签名URL
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func (h *Handler) handlePresignUpload(w http.ResponseWriter, r *http.Request) {
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var req PresignUploadRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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h.sendError(w, http.StatusBadRequest, "invalid request body")
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return
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}
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if req.Key == "" {
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h.sendError(w, http.StatusBadRequest, "key is required")
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return
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}
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// 选择存储桶
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bucket, err := h.balancer.SelectBucket(req.Key, req.Size)
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if err != nil {
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h.sendError(w, http.StatusServiceUnavailable, err.Error())
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return
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}
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// 生成预签名URL
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uploadURL, err := h.presigner.GenerateUploadURL(
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context.Background(),
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bucket,
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req.Key,
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req.ContentType,
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req.Metadata,
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)
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if err != nil {
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h.sendError(w, http.StatusInternalServerError, "failed to generate upload URL")
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return
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}
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// 记录对象元数据
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if err := h.storage.RecordObject(req.Key, bucket.Config.Name, req.Size, req.Metadata); err != nil {
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log.Printf("Failed to record object metadata: %v", err)
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}
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// 更新存储桶使用量（预估）
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bucket.UpdateUsedSize(req.Size)
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h.sendJSON(w, http.StatusOK, uploadURL)
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}
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// PresignDownloadRequest 下载预签名请求
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type PresignDownloadRequest struct {
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Key string `json:"key"`
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}
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// 生成下载预签名URL
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func (h *Handler) handlePresignDownload(w http.ResponseWriter, r *http.Request) {
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var req PresignDownloadRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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h.sendError(w, http.StatusBadRequest, "invalid request body")
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return
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}
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if req.Key == "" {
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h.sendError(w, http.StatusBadRequest, "key is required")
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return
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}
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// 查找对象所在的存储桶
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bucketName, err := h.storage.FindObjectBucket(req.Key)
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if err != nil {
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h.sendError(w, http.StatusNotFound, "object not found")
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return
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}
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bucket, ok := h.bucketManager.GetBucket(bucketName)
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if !ok {
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h.sendError(w, http.StatusNotFound, "bucket not found")
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return
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}
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// 生成预签名URL
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downloadURL, err := h.presigner.GenerateDownloadURL(
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context.Background(),
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bucket,
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req.Key,
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)
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if err != nil {
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h.sendError(w, http.StatusInternalServerError, "failed to generate download URL")
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return
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}
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h.sendJSON(w, http.StatusOK, downloadURL)
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}
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// PresignDeleteRequest 删除预签名请求
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type PresignDeleteRequest struct {
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Key string `json:"key"`
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}
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// 生成删除预签名URL
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func (h *Handler) handlePresignDelete(w http.ResponseWriter, r *http.Request) {
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var req PresignDeleteRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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h.sendError(w, http.StatusBadRequest, "invalid request body")
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return
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}
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if req.Key == "" {
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h.sendError(w, http.StatusBadRequest, "key is required")
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return
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}
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// 查找对象所在的存储桶
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bucketName, err := h.storage.FindObjectBucket(req.Key)
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if err != nil {
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h.sendError(w, http.StatusNotFound, "object not found")
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return
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}
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bucket, ok := h.bucketManager.GetBucket(bucketName)
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if !ok {
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h.sendError(w, http.StatusNotFound, "bucket not found")
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return
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}
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// 生成预签名URL
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deleteURL, err := h.presigner.GenerateDeleteURL(
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context.Background(),
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bucket,
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req.Key,
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)
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if err != nil {
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h.sendError(w, http.StatusInternalServerError, "failed to generate delete URL")
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return
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}
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h.sendJSON(w, http.StatusOK, deleteURL)
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}
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// PresignMultipartRequest 分片上传预签名请求
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type PresignMultipartRequest struct {
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Key string `json:"key"`
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PartCount int `json:"part_count"`
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Size int64 `json:"size"`
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}
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// 生成分片上传预签名URLs
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func (h *Handler) handlePresignMultipart(w http.ResponseWriter, r *http.Request) {
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var req PresignMultipartRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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h.sendError(w, http.StatusBadRequest, "invalid request body")
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return
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}
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if req.Key == "" || req.PartCount <= 0 {
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h.sendError(w, http.StatusBadRequest, "invalid parameters")
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return
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}
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// 选择存储桶
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bucket, err := h.balancer.SelectBucket(req.Key, req.Size)
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if err != nil {
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h.sendError(w, http.StatusServiceUnavailable, err.Error())
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return
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}
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// 生成预签名URLs
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multipartURLs, err := h.presigner.GenerateMultipartUploadURLs(
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context.Background(),
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bucket,
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req.Key,
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req.PartCount,
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)
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if err != nil {
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h.sendError(w, http.StatusInternalServerError, "failed to generate multipart URLs")
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return
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}
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// 记录对象元数据
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if err := h.storage.RecordObject(req.Key, bucket.Config.Name, req.Size, nil); err != nil {
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log.Printf("Failed to record object metadata: %v", err)
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}
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// 更新存储桶使用量（预估）
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bucket.UpdateUsedSize(req.Size)
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h.sendJSON(w, http.StatusOK, multipartURLs)
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}
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// 列出对象
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func (h *Handler) handleListObjects(w http.ResponseWriter, r *http.Request) {
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prefix := r.URL.Query().Get("prefix")
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bucketName := r.URL.Query().Get("bucket")
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marker := r.URL.Query().Get("marker")
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limitStr := r.URL.Query().Get("limit")
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limit := 100
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if limitStr != "" {
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if l, err := strconv.Atoi(limitStr); err == nil && l > 0 {
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limit = l
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}
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}
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// 调用更新后的ListObjects方法，传入所有必需的参数
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objects, err := h.storage.ListObjects(bucketName, prefix, marker, limit)
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if err != nil {
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h.sendError(w, http.StatusInternalServerError, "failed to list objects")
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return
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}
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h.sendJSON(w, http.StatusOK, map[string]interface{}{
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"objects": objects,
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"count": len(objects),
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})
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}
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// 获取对象信息
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func (h *Handler) handleGetObjectInfo(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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key := vars["key"]
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info, err := h.storage.GetObjectInfo(key)
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if err != nil {
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h.sendError(w, http.StatusNotFound, "object not found")
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return
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}
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h.sendJSON(w, http.StatusOK, info)
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}
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// 删除对象（只删除元数据记录）
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func (h *Handler) handleDeleteObject(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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key := vars["key"]
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// 获取对象信息以更新存储桶使用量
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info, err := h.storage.GetObjectInfo(key)
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if err != nil {
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h.sendError(w, http.StatusNotFound, "object not found")
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return
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}
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// 更新存储桶使用量
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if bucket, ok := h.bucketManager.GetBucket(info.BucketName); ok {
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bucket.UpdateUsedSize(-info.Size)
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}
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// 删除元数据记录
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if err := h.storage.DeleteObject(key); err != nil {
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h.sendError(w, http.StatusInternalServerError, "failed to delete object")
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return
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}
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h.sendJSON(w, http.StatusOK, map[string]string{
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"message": "object deleted successfully",
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})
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}
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// 发送JSON响应
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func (h *Handler) sendJSON(w http.ResponseWriter, status int, data interface{}) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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json.NewEncoder(w).Encode(data)
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}
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// 发送错误响应
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func (h *Handler) sendError(w http.ResponseWriter, status int, message string) {
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h.sendJSON(w, status, map[string]string{
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"error": message,
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})
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}
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