seaweedfs/weed/s3api/s3api_object_handlers.go

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package s3api
import (
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"crypto/md5"
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"encoding/json"
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"encoding/xml"
"fmt"
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"io"
"io/ioutil"
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"net/http"
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"strings"
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"github.com/gorilla/mux"
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"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/server"
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"github.com/chrislusf/seaweedfs/weed/util"
)
var (
client *http.Client
)
func init() {
client = &http.Client{Transport: &http.Transport{
MaxIdleConnsPerHost: 1024,
}}
}
func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
// http://docs.aws.amazon.com/AmazonS3/latest/dev/UploadingObjects.html
vars := mux.Vars(r)
bucket := vars["bucket"]
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object := getObject(vars)
_, err := validateContentMd5(r.Header)
if err != nil {
writeErrorResponse(w, ErrInvalidDigest, r.URL)
return
}
rAuthType := getRequestAuthType(r)
dataReader := r.Body
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var s3ErrCode ErrorCode
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if rAuthType == authTypeStreamingSigned {
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dataReader, s3ErrCode = s3a.iam.newSignV4ChunkedReader(r)
}
if s3ErrCode != ErrNone {
writeErrorResponse(w, s3ErrCode, r.URL)
return
}
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defer dataReader.Close()
uploadUrl := fmt.Sprintf("http://%s%s/%s%s", s3a.option.Filer, s3a.option.BucketsPath, bucket, object)
etag, errCode := s3a.putToFiler(r, uploadUrl, dataReader)
if errCode != ErrNone {
writeErrorResponse(w, errCode, r.URL)
return
}
setEtag(w, etag)
writeSuccessResponseEmpty(w)
}
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func (s3a *S3ApiServer) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
bucket := vars["bucket"]
object := getObject(vars)
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if strings.HasSuffix(r.URL.Path, "/") {
writeErrorResponse(w, ErrNotImplemented, r.URL)
return
}
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destUrl := fmt.Sprintf("http://%s%s/%s%s",
s3a.option.Filer, s3a.option.BucketsPath, bucket, object)
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s3a.proxyToFiler(w, r, destUrl, passThroughResponse)
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}
func (s3a *S3ApiServer) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
bucket := vars["bucket"]
object := getObject(vars)
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destUrl := fmt.Sprintf("http://%s%s/%s%s",
s3a.option.Filer, s3a.option.BucketsPath, bucket, object)
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s3a.proxyToFiler(w, r, destUrl, passThroughResponse)
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}
func (s3a *S3ApiServer) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
bucket := vars["bucket"]
object := getObject(vars)
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destUrl := fmt.Sprintf("http://%s%s/%s%s",
s3a.option.Filer, s3a.option.BucketsPath, bucket, object)
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s3a.proxyToFiler(w, r, destUrl, func(proxyResonse *http.Response, w http.ResponseWriter) {
for k, v := range proxyResonse.Header {
w.Header()[k] = v
}
w.WriteHeader(http.StatusNoContent)
})
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}
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/// ObjectIdentifier carries key name for the object to delete.
type ObjectIdentifier struct {
ObjectName string `xml:"Key"`
}
// DeleteObjectsRequest - xml carrying the object key names which needs to be deleted.
type DeleteObjectsRequest struct {
// Element to enable quiet mode for the request
Quiet bool
// List of objects to be deleted
Objects []ObjectIdentifier `xml:"Object"`
}
// DeleteError structure.
type DeleteError struct {
Code string
Message string
Key string
}
// DeleteObjectsResponse container for multiple object deletes.
type DeleteObjectsResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ DeleteResult" json:"-"`
// Collection of all deleted objects
DeletedObjects []ObjectIdentifier `xml:"Deleted,omitempty"`
// Collection of errors deleting certain objects.
Errors []DeleteError `xml:"Error,omitempty"`
}
// DeleteMultipleObjectsHandler - Delete multiple objects
func (s3a *S3ApiServer) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
bucket := vars["bucket"]
deleteXMLBytes, err := ioutil.ReadAll(r.Body)
if err != nil {
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
deleteObjects := &DeleteObjectsRequest{}
if err := xml.Unmarshal(deleteXMLBytes, deleteObjects); err != nil {
writeErrorResponse(w, ErrMalformedXML, r.URL)
return
}
var deletedObjects []ObjectIdentifier
var deleteErrors []DeleteError
s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
for _, object := range deleteObjects.Objects {
lastSeparator := strings.LastIndex(object.ObjectName, "/")
parentDirectoryPath, entryName, isDeleteData, isRecursive := "/", object.ObjectName, true, false
if lastSeparator > 0 && lastSeparator+1 < len(object.ObjectName) {
entryName = object.ObjectName[lastSeparator+1:]
parentDirectoryPath = "/" + object.ObjectName[:lastSeparator]
}
parentDirectoryPath = fmt.Sprintf("%s/%s%s", s3a.option.BucketsPath, bucket, parentDirectoryPath)
err := doDeleteEntry(client, parentDirectoryPath, entryName, isDeleteData, isRecursive)
if err == nil {
deletedObjects = append(deletedObjects, object)
} else {
deleteErrors = append(deleteErrors, DeleteError{
Code: "",
Message: err.Error(),
Key: object.ObjectName,
})
}
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}
return nil
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})
deleteResp := DeleteObjectsResponse{}
if !deleteObjects.Quiet {
deleteResp.DeletedObjects = deletedObjects
}
deleteResp.Errors = deleteErrors
writeSuccessResponseXML(w, encodeResponse(deleteResp))
}
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func (s3a *S3ApiServer) proxyToFiler(w http.ResponseWriter, r *http.Request, destUrl string, responseFn func(proxyResonse *http.Response, w http.ResponseWriter)) {
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glog.V(2).Infof("s3 proxying %s to %s", r.Method, destUrl)
proxyReq, err := http.NewRequest(r.Method, destUrl, r.Body)
if err != nil {
glog.Errorf("NewRequest %s: %v", destUrl, err)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
proxyReq.Header.Set("Host", s3a.option.Filer)
proxyReq.Header.Set("X-Forwarded-For", r.RemoteAddr)
for header, values := range r.Header {
for _, value := range values {
proxyReq.Header.Add(header, value)
}
}
resp, postErr := client.Do(proxyReq)
if postErr != nil {
glog.Errorf("post to filer: %v", postErr)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
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defer util.CloseResponse(resp)
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responseFn(resp, w)
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}
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func passThroughResponse(proxyResonse *http.Response, w http.ResponseWriter) {
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for k, v := range proxyResonse.Header {
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w.Header()[k] = v
}
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w.WriteHeader(proxyResonse.StatusCode)
io.Copy(w, proxyResonse.Body)
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}
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func (s3a *S3ApiServer) putToFiler(r *http.Request, uploadUrl string, dataReader io.Reader) (etag string, code ErrorCode) {
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hash := md5.New()
var body = io.TeeReader(dataReader, hash)
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proxyReq, err := http.NewRequest("PUT", uploadUrl, body)
if err != nil {
glog.Errorf("NewRequest %s: %v", uploadUrl, err)
return "", ErrInternalError
}
proxyReq.Header.Set("Host", s3a.option.Filer)
proxyReq.Header.Set("X-Forwarded-For", r.RemoteAddr)
for header, values := range r.Header {
for _, value := range values {
proxyReq.Header.Add(header, value)
}
}
resp, postErr := client.Do(proxyReq)
if postErr != nil {
glog.Errorf("post to filer: %v", postErr)
return "", ErrInternalError
}
defer resp.Body.Close()
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etag = fmt.Sprintf("%x", hash.Sum(nil))
resp_body, ra_err := ioutil.ReadAll(resp.Body)
if ra_err != nil {
glog.Errorf("upload to filer response read: %v", ra_err)
return etag, ErrInternalError
}
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var ret weed_server.FilerPostResult
unmarshal_err := json.Unmarshal(resp_body, &ret)
if unmarshal_err != nil {
glog.Errorf("failing to read upload to %s : %v", uploadUrl, string(resp_body))
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return "", ErrInternalError
}
if ret.Error != "" {
glog.Errorf("upload to filer error: %v", ret.Error)
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return "", ErrInternalError
}
return etag, ErrNone
}
func setEtag(w http.ResponseWriter, etag string) {
if etag != "" {
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if strings.HasPrefix(etag, "\"") {
w.Header().Set("ETag", etag)
} else {
w.Header().Set("ETag", "\""+etag+"\"")
}
}
}
func getObject(vars map[string]string) string {
object := vars["object"]
if !strings.HasPrefix(object, "/") {
object = "/" + object
}
return object
}