Files
s3-balance/internal/api/multipart_handler.go
2025-09-30 00:42:59 +08:00

673 lines
21 KiB
Go

package api
import (
"context"
"encoding/xml"
"errors"
"fmt"
"io"
"log"
"net/http"
"sort"
"strconv"
"time"
"github.com/DullJZ/s3-balance/internal/bucket"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/aws/aws-sdk-go-v2/service/s3/types"
"github.com/aws/smithy-go"
"github.com/gorilla/mux"
)
// handleUploadPart 处理分片上传的单个分片
func (h *S3Handler) handleUploadPart(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucket"]
key := vars["key"]
partNumber := vars["partNumber"]
uploadID := vars["uploadId"]
// 检查请求的存储桶是否为虚拟存储桶
requestedBucket, ok := h.bucketManager.GetBucket(bucketName)
if !ok {
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
// 获取内容长度
contentLength := r.ContentLength
if contentLength < 0 {
h.sendS3Error(w, "MissingContentLength", "Content-Length header is required", key)
return
}
var targetBucket *bucket.BucketInfo
// 如果是虚拟存储桶,需要通过映射查找真实存储桶
if requestedBucket.IsVirtual() {
// 获取虚拟存储桶映射
mapping, err := h.storage.GetVirtualBucketMapping(bucketName, key)
if err != nil {
// 对于分片上传,映射应该在初始化分片上传时已经创建
// 如果没有找到映射,使用负载均衡器选择一个新的存储桶
targetBucket, err = h.balancer.SelectBucket(key, contentLength)
if err != nil {
h.sendS3Error(w, "InternalError", "Failed to select bucket for multipart upload", key)
return
}
// 创建虚拟存储桶文件级映射
if err := h.storage.CreateVirtualBucketMapping(bucketName, key, targetBucket.Config.Name); err != nil {
h.sendS3Error(w, "InternalError", "Failed to create virtual bucket file mapping", key)
return
}
} else {
// 映射已存在,获取对应的真实存储桶
targetBucket, ok = h.bucketManager.GetBucket(mapping.RealBucketName)
if !ok {
h.sendS3Error(w, "InternalError", "Mapped real bucket not found", key)
return
}
}
} else {
// 如果不是虚拟存储桶,拒绝客户端对真实存储桶的直接操作
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
// 转换partNumber为整数
partNum, err := strconv.Atoi(partNumber)
if err != nil {
h.sendS3Error(w, "InvalidArgument", "Invalid part number", key)
return
}
// 生成预签名上传分片URL
presignClient := s3.NewPresignClient(targetBucket.Client)
uploadPartInput := &s3.UploadPartInput{
Bucket: aws.String(targetBucket.Config.Name),
Key: aws.String(key),
UploadId: aws.String(uploadID),
PartNumber: aws.Int32(int32(partNum)),
}
presignRequest, err := presignClient.PresignUploadPart(context.Background(), uploadPartInput, func(opts *s3.PresignOptions) {
opts.Expires = 15 * time.Minute
})
if err != nil {
log.Printf("Failed to generate upload part URL for key %s, part %s: %v", key, partNumber, err)
h.sendS3Error(w, "InternalError", "Failed to generate upload part URL", key)
return
}
// 使用反向代理上传分片到真实预签名URL
req, err := http.NewRequest("PUT", presignRequest.URL, r.Body)
if err != nil {
h.sendS3Error(w, "InternalError", "Failed to create upload part request", key)
return
}
// 设置必要的头
req.ContentLength = contentLength
if ct := r.Header.Get("Content-Type"); ct != "" {
req.Header.Set("Content-Type", ct)
}
// 执行上传
client := &http.Client{Timeout: 30 * time.Minute}
resp, err := client.Do(req)
if err != nil {
log.Printf("Failed to upload part %s for key %s: %v", partNumber, key, err)
h.sendS3Error(w, "InternalError", "Failed to upload part", key)
return
}
defer resp.Body.Close()
if resp.StatusCode >= 200 && resp.StatusCode < 300 {
// 从响应中获取ETag并返回给客户端
etag := resp.Header.Get("ETag")
if etag != "" {
w.Header().Set("ETag", etag)
}
// 更新上传会话的分片数
session, err := h.storage.GetUploadSession(uploadID)
if err != nil {
log.Printf("Failed to get upload session for uploadID %s: %v", uploadID, err)
} else {
// 更新已完成的分片数
if err := h.storage.UpdateUploadSession(uploadID, session.CompletedParts+1, "pending"); err != nil {
log.Printf("Failed to update upload session for uploadID %s: %v", uploadID, err)
}
}
w.WriteHeader(http.StatusOK)
} else {
// 读取错误响应体以获取详细信息
body, _ := io.ReadAll(resp.Body)
log.Printf("Upload part failed with status %d: %s", resp.StatusCode, string(body))
h.sendS3Error(w, "InternalError", fmt.Sprintf("Upload part failed with status %d", resp.StatusCode), key)
}
}
// handleMultipartUpload 初始化分片上传
func (h *S3Handler) handleMultipartUpload(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucket"]
key := vars["key"]
// 检查请求的存储桶是否为虚拟存储桶
requestedBucket, ok := h.bucketManager.GetBucket(bucketName)
if !ok {
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
var targetBucket *bucket.BucketInfo
var err error
// 如果是虚拟存储桶,需要选择真实存储桶并创建映射
if requestedBucket.IsVirtual() {
// 选择目标存储桶
targetBucket, err = h.balancer.SelectBucket(key, 0) // 分片上传时不检查空间
if err != nil {
h.sendS3Error(w, "InternalError", "Failed to select bucket for upload", key)
return
}
// 创建虚拟存储桶文件级映射
if err := h.storage.CreateVirtualBucketMapping(bucketName, key, targetBucket.Config.Name); err != nil {
h.sendS3Error(w, "InternalError", "Failed to create virtual bucket file mapping", key)
return
}
} else {
// 如果不是虚拟存储桶,拒绝客户端对真实存储桶的直接操作
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
// 初始化分片上传
ctx := context.Background()
createResp, err := targetBucket.Client.CreateMultipartUpload(ctx, &s3.CreateMultipartUploadInput{
Bucket: aws.String(targetBucket.Config.Name),
Key: aws.String(key),
})
if err != nil {
h.sendS3Error(w, "InternalError", "Failed to initiate multipart upload", key)
return
}
uploadID := *createResp.UploadId
// 记录上传会话到数据库
if err := h.storage.RecordUploadSession(uploadID, key, targetBucket.Config.Name, 0, 0); err != nil {
log.Printf("Failed to record upload session for uploadID %s: %v", uploadID, err)
// 不影响主流程,继续处理
}
result := InitiateMultipartUploadResult{
Xmlns: "http://s3.amazonaws.com/doc/2006-03-01/",
Bucket: bucketName, // 返回虚拟存储桶名称给客户端
Key: key,
UploadID: uploadID,
}
h.sendXMLResponse(w, http.StatusOK, result)
}
// handleListMultipartUploads 列出分片上传
func (h *S3Handler) handleListMultipartUploads(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucket"]
// 解析查询参数
queryParams := r.URL.Query()
keyMarker := queryParams.Get("key-marker")
uploadIdMarker := queryParams.Get("upload-id-marker")
prefix := queryParams.Get("prefix")
delimiter := queryParams.Get("delimiter")
maxUploadsStr := queryParams.Get("max-uploads")
maxUploads := 1000
if maxUploadsStr != "" {
if m, err := strconv.Atoi(maxUploadsStr); err == nil && m > 0 {
maxUploads = m
}
}
// 检查请求的存储桶
requestedBucket, ok := h.bucketManager.GetBucket(bucketName)
if !ok {
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
var allUploads []Upload
var isTruncated bool
// 如果是虚拟存储桶,从数据库查询上传会话
if requestedBucket.IsVirtual() {
// 从数据库获取待处理的上传会话
sessions, err := h.storage.GetPendingUploadSessions(prefix, keyMarker, uploadIdMarker, maxUploads)
if err != nil {
log.Printf("Failed to get pending upload sessions: %v", err)
// 降级到遍历所有存储桶的方式
ctx := context.Background()
allBuckets := h.bucketManager.GetAllBuckets()
for _, bucket := range allBuckets {
if bucket.IsVirtual() {
continue
}
// 列出每个真实存储桶的分片上传
listResp, err := bucket.Client.ListMultipartUploads(ctx, &s3.ListMultipartUploadsInput{
Bucket: aws.String(bucket.Config.Name),
KeyMarker: aws.String(keyMarker),
UploadIdMarker: aws.String(uploadIdMarker),
Prefix: aws.String(prefix),
Delimiter: aws.String(delimiter),
MaxUploads: aws.Int32(int32(maxUploads)),
})
if err != nil {
log.Printf("Failed to list multipart uploads for bucket %s: %v", bucket.Config.Name, err)
continue
}
// 将结果添加到列表中
for _, upload := range listResp.Uploads {
allUploads = append(allUploads, Upload{
Key: aws.ToString(upload.Key),
UploadID: aws.ToString(upload.UploadId),
Initiator: Owner{
ID: aws.ToString(upload.Initiator.ID),
DisplayName: aws.ToString(upload.Initiator.DisplayName),
},
Owner: Owner{
ID: aws.ToString(upload.Owner.ID),
DisplayName: aws.ToString(upload.Owner.DisplayName),
},
StorageClass: string(upload.StorageClass),
Initiated: aws.ToTime(upload.Initiated),
})
}
}
} else {
// 成功从数据库获取会话
if len(sessions) > maxUploads {
sessions = sessions[:maxUploads]
isTruncated = true
}
// 转换会话为Upload格式
for _, session := range sessions {
allUploads = append(allUploads, Upload{
Key: session.Key,
UploadID: session.UploadID,
Initiator: Owner{
ID: "s3-balance",
DisplayName: "S3 Balance User",
},
Owner: Owner{
ID: "s3-balance",
DisplayName: "S3 Balance User",
},
StorageClass: "STANDARD",
Initiated: session.CreatedAt,
})
}
}
} else {
// 如果不是虚拟存储桶,拒绝客户端对真实存储桶的直接操作
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
// 构建响应
result := ListMultipartUploadsResult{
Xmlns: "http://s3.amazonaws.com/doc/2006-03-01/",
Bucket: bucketName,
KeyMarker: keyMarker,
UploadIdMarker: uploadIdMarker,
MaxUploads: maxUploads,
IsTruncated: isTruncated,
Uploads: allUploads,
}
// 如果有更多结果,设置下一个标记
if isTruncated && len(allUploads) > 0 {
lastUpload := allUploads[len(allUploads)-1]
result.NextKeyMarker = lastUpload.Key
result.NextUploadIdMarker = lastUpload.UploadID
}
h.sendXMLResponse(w, http.StatusOK, result)
}
// handleListMultipartParts 列出分片上传的分片
func (h *S3Handler) handleListMultipartParts(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucket"]
key := vars["key"]
uploadID := r.URL.Query().Get("uploadId")
// 解析查询参数
queryParams := r.URL.Query()
partNumberMarkerStr := queryParams.Get("part-number-marker")
partNumberMarker := 0
if partNumberMarkerStr != "" {
if m, err := strconv.Atoi(partNumberMarkerStr); err == nil && m > 0 {
partNumberMarker = m
}
}
maxPartsStr := queryParams.Get("max-parts")
maxParts := 1000
if maxPartsStr != "" {
if m, err := strconv.Atoi(maxPartsStr); err == nil && m > 0 {
maxParts = m
}
}
// 检查请求的存储桶
requestedBucket, ok := h.bucketManager.GetBucket(bucketName)
if !ok {
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
var targetBucket *bucket.BucketInfo
// 如果是虚拟存储桶,需要通过映射查找真实存储桶
if requestedBucket.IsVirtual() {
// 获取虚拟存储桶映射
mapping, err := h.storage.GetVirtualBucketMapping(bucketName, key)
if err != nil {
// 如果没有找到映射,尝试查询所有真实存储桶
allBuckets := h.bucketManager.GetAllBuckets()
for _, bucket := range allBuckets {
if bucket.IsVirtual() {
continue
}
// 尝试列出分片,如果成功则说明上传在这个桶中
ctx := context.Background()
_, err := bucket.Client.ListParts(ctx, &s3.ListPartsInput{
Bucket: aws.String(bucket.Config.Name),
Key: aws.String(key),
UploadId: aws.String(uploadID),
PartNumberMarker: aws.String(strconv.Itoa(partNumberMarker)),
MaxParts: aws.Int32(1), // 只检查是否存在
})
if err == nil {
targetBucket = bucket
break
}
}
if targetBucket == nil {
h.sendS3Error(w, "NoSuchUpload", "The specified multipart upload does not exist", uploadID)
return
}
} else {
// 获取映射到的真实存储桶
targetBucket, ok = h.bucketManager.GetBucket(mapping.RealBucketName)
if !ok {
h.sendS3Error(w, "InternalError", "Mapped real bucket not found", key)
return
}
}
} else {
// 如果不是虚拟存储桶,拒绝客户端对真实存储桶的直接操作
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
// 列出分片
ctx := context.Background()
listResp, err := targetBucket.Client.ListParts(ctx, &s3.ListPartsInput{
Bucket: aws.String(targetBucket.Config.Name),
Key: aws.String(key),
UploadId: aws.String(uploadID),
PartNumberMarker: aws.String(strconv.Itoa(partNumberMarker)),
MaxParts: aws.Int32(int32(maxParts)),
})
if err != nil {
h.sendS3Error(w, "NoSuchUpload", "The specified multipart upload does not exist", uploadID)
return
}
// 转换分片列表
var parts []Part
for _, part := range listResp.Parts {
parts = append(parts, Part{
PartNumber: int(aws.ToInt32(part.PartNumber)),
LastModified: aws.ToTime(part.LastModified),
ETag: aws.ToString(part.ETag),
Size: aws.ToInt64(part.Size),
})
}
// 构建响应
result := ListPartsResult{
Xmlns: "http://s3.amazonaws.com/doc/2006-03-01/",
Bucket: bucketName, // 返回虚拟存储桶名称给客户端
Key: key,
UploadID: uploadID,
PartNumberMarker: partNumberMarker,
MaxParts: maxParts,
IsTruncated: aws.ToBool(listResp.IsTruncated),
Parts: parts,
}
// 设置下一个分片标记
if listResp.NextPartNumberMarker != nil {
if nextMarker, err := strconv.Atoi(aws.ToString(listResp.NextPartNumberMarker)); err == nil {
result.NextPartNumberMarker = nextMarker
}
}
h.sendXMLResponse(w, http.StatusOK, result)
}
// handleCompleteMultipartUpload 完成分片上传
func (h *S3Handler) handleCompleteMultipartUpload(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucket"]
key := vars["key"]
uploadID := r.URL.Query().Get("uploadId")
// 检查请求的存储桶是否为虚拟存储桶
requestedBucket, ok := h.bucketManager.GetBucket(bucketName)
if !ok {
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
var targetBucket *bucket.BucketInfo
// 如果是虚拟存储桶,需要通过映射查找真实存储桶
if requestedBucket.IsVirtual() {
// 获取虚拟存储桶映射
mapping, err := h.storage.GetVirtualBucketMapping(bucketName, key)
if err != nil {
h.sendS3Error(w, "NoSuchKey", "The specified key does not exist", key)
return
}
// 获取映射到的真实存储桶
targetBucket, ok = h.bucketManager.GetBucket(mapping.RealBucketName)
if !ok {
h.sendS3Error(w, "InternalError", "Mapped real bucket not found", key)
return
}
} else {
// 如果不是虚拟存储桶,拒绝客户端对真实存储桶的直接操作
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
// 解析请求体以获取分片列表
var completeReq CompleteMultipartUpload
body, _ := io.ReadAll(r.Body)
err := xml.Unmarshal(body, &completeReq)
if err != nil {
log.Printf("Failed to parse CompleteMultipartUpload request body: %v, body: %s", err, string(body))
h.sendS3Error(w, "MalformedXML", "The XML you provided was not well-formed", key)
return
}
log.Printf("CompleteMultipartUpload request - Bucket: %s, Key: %s, UploadID: %s, Parts: %d",
bucketName, key, uploadID, len(completeReq.Parts))
for i, part := range completeReq.Parts {
log.Printf(" Part %d: PartNumber=%d, ETag=%s", i+1, part.PartNumber, part.ETag)
}
// 完成分片上传
ctx := context.Background()
sort.SliceStable(completeReq.Parts, func(i, j int) bool {
return completeReq.Parts[i].PartNumber < completeReq.Parts[j].PartNumber
})
var parts []types.CompletedPart
for _, part := range completeReq.Parts {
parts = append(parts, types.CompletedPart{
ETag: aws.String(part.ETag),
PartNumber: aws.Int32(int32(part.PartNumber)),
})
}
log.Printf("Calling CompleteMultipartUpload on real bucket %s with uploadID %s", targetBucket.Config.Name, uploadID)
completeResp, err := targetBucket.Client.CompleteMultipartUpload(ctx, &s3.CompleteMultipartUploadInput{
Bucket: aws.String(targetBucket.Config.Name),
Key: aws.String(key),
UploadId: aws.String(uploadID),
MultipartUpload: &types.CompletedMultipartUpload{
Parts: parts,
},
})
if err != nil {
log.Printf("CompleteMultipartUpload failed: %v", err)
if apiErr, ok := getAPIError(err); ok {
h.sendS3Error(w, apiErr.ErrorCode(), apiErr.ErrorMessage(), key)
} else {
h.sendS3Error(w, "InternalError", "Failed to complete multipart upload", key)
}
return
}
result := CompleteMultipartUploadResult{
Xmlns: "http://s3.amazonaws.com/doc/2006-03-01/",
Location: "/" + bucketName + "/" + key, // 返回虚拟存储桶路径
Bucket: bucketName, // 返回虚拟存储桶名称
Key: key,
ETag: *completeResp.ETag,
}
// 获取完成上传后的对象大小
var objectSize int64
headResp, err := targetBucket.Client.HeadObject(ctx, &s3.HeadObjectInput{
Bucket: aws.String(targetBucket.Config.Name),
Key: aws.String(key),
})
if err != nil {
// 如果获取大小失败,记录警告但不影响响应
log.Printf("Warning: Failed to get object size after multipart upload for key %s: %v", key, err)
objectSize = 0
} else if headResp.ContentLength != nil {
objectSize = *headResp.ContentLength
}
// 记录对象元数据(使用实际大小)
h.storage.RecordObject(key, targetBucket.Config.Name, objectSize, nil)
// 更新存储桶使用量
if objectSize > 0 {
targetBucket.UpdateUsedSize(objectSize)
}
// 更新上传会话状态为已完成
if err := h.storage.UpdateUploadSession(uploadID, len(completeReq.Parts), "completed"); err != nil {
log.Printf("Failed to update upload session status to completed for uploadID %s: %v", uploadID, err)
// 不影响主流程
}
h.sendXMLResponse(w, http.StatusOK, result)
}
func getAPIError(err error) (smithy.APIError, bool) {
var apiErr smithy.APIError
if errors.As(err, &apiErr) {
return apiErr, true
}
var opErr *smithy.OperationError
if errors.As(err, &opErr) {
if apiErr, ok := opErr.Err.(smithy.APIError); ok {
return apiErr, true
}
}
return nil, false
}
// handleAbortMultipartUpload 中止分片上传
func (h *S3Handler) handleAbortMultipartUpload(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucket"]
key := vars["key"]
uploadID := r.URL.Query().Get("uploadId")
// 检查请求的存储桶是否为虚拟存储桶
requestedBucket, ok := h.bucketManager.GetBucket(bucketName)
if !ok {
h.sendS3Error(w, "NoSuchBucket", "The specified bucket does not exist", bucketName)
return
}
var targetBucket *bucket.BucketInfo
// 如果是虚拟存储桶,需要通过映射查找真实存储桶
if requestedBucket.IsVirtual() {
// 获取虚拟存储桶映射
mapping, err := h.storage.GetVirtualBucketMapping(bucketName, key)
if err != nil {
// 如果映射不存在,可能是上传已经被中止了,返回成功
w.WriteHeader(http.StatusNoContent)
return
}
// 获取映射到的真实存储桶
targetBucket, ok = h.bucketManager.GetBucket(mapping.RealBucketName)
if !ok {
h.sendS3Error(w, "InternalError", "Mapped real bucket not found", key)
return
}
} else {
// 如果不是虚拟存储桶,拒绝客户端对真实存储桶的直接操作
w.WriteHeader(http.StatusNoContent)
return
}
// 中止分片上传
ctx := context.Background()
_, err := targetBucket.Client.AbortMultipartUpload(ctx, &s3.AbortMultipartUploadInput{
Bucket: aws.String(targetBucket.Config.Name),
Key: aws.String(key),
UploadId: aws.String(uploadID),
})
if err != nil {
// 如果中止失败,可能是因为上传已经完成或中止,不需要报错
log.Printf("Failed to abort multipart upload for key %s: %v", key, err)
}
// 更新上传会话状态为已中止
if err := h.storage.UpdateUploadSession(uploadID, 0, "aborted"); err != nil {
log.Printf("Failed to update upload session status to aborted for uploadID %s: %v", uploadID, err)
// 不影响主流程
}
// 如果是虚拟存储桶,还需要删除文件级别映射
if requestedBucket.IsVirtual() {
h.storage.DeleteVirtualBucketFileMapping(bucketName, key)
}
w.WriteHeader(http.StatusNoContent)
}