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filer_server_handlers_tagging.go
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filer_server_handlers_tagging.go
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package weed_server
import (
"context"
"net/http"
"strings"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/storage/needle"
"github.com/seaweedfs/seaweedfs/weed/util"
)
// add or replace one file Seaweed- prefixed attributes
// curl -X PUT -H "Seaweed-Name1: value1" http://localhost:8888/path/to/a/file?tagging
func (fs *FilerServer) PutTaggingHandler(w http.ResponseWriter, r *http.Request) {
ctx := context.Background()
path := r.URL.Path
if strings.HasSuffix(path, "/") {
path = path[:len(path)-1]
}
existingEntry, err := fs.filer.FindEntry(ctx, util.FullPath(path))
if err != nil {
writeJsonError(w, r, http.StatusNotFound, err)
return
}
if existingEntry == nil {
writeJsonError(w, r, http.StatusNotFound, err)
return
}
if existingEntry.Extended == nil {
existingEntry.Extended = make(map[string][]byte)
}
for header, values := range r.Header {
if strings.HasPrefix(header, needle.PairNamePrefix) {
for _, value := range values {
existingEntry.Extended[header] = []byte(value)
}
}
}
if dbErr := fs.filer.CreateEntry(ctx, existingEntry, false, false, nil, false, fs.filer.MaxFilenameLength); dbErr != nil {
glog.V(0).Infof("failing to update %s tagging : %v", path, dbErr)
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
writeJsonQuiet(w, r, http.StatusAccepted, nil)
return
}
// remove all Seaweed- prefixed attributes
// curl -X DELETE http://localhost:8888/path/to/a/file?tagging
func (fs *FilerServer) DeleteTaggingHandler(w http.ResponseWriter, r *http.Request) {
ctx := context.Background()
path := r.URL.Path
if strings.HasSuffix(path, "/") {
path = path[:len(path)-1]
}
existingEntry, err := fs.filer.FindEntry(ctx, util.FullPath(path))
if err != nil {
writeJsonError(w, r, http.StatusNotFound, err)
return
}
if existingEntry == nil {
writeJsonError(w, r, http.StatusNotFound, err)
return
}
if existingEntry.Extended == nil {
existingEntry.Extended = make(map[string][]byte)
}
// parse out tags to be deleted
toDelete := strings.Split(r.URL.Query().Get("tagging"), ",")
deletions := make(map[string]struct{})
for _, deletion := range toDelete {
if deletion != "" {
deletions[deletion] = struct{}{}
}
}
// delete all tags or specific tags
hasDeletion := false
for header, _ := range existingEntry.Extended {
if strings.HasPrefix(header, needle.PairNamePrefix) {
if len(deletions) == 0 {
delete(existingEntry.Extended, header)
hasDeletion = true
} else {
tag := header[len(needle.PairNamePrefix):]
if _, found := deletions[tag]; found {
delete(existingEntry.Extended, header)
hasDeletion = true
}
}
}
}
if !hasDeletion {
writeJsonQuiet(w, r, http.StatusNotModified, nil)
return
}
if dbErr := fs.filer.CreateEntry(ctx, existingEntry, false, false, nil, false, fs.filer.MaxFilenameLength); dbErr != nil {
glog.V(0).Infof("failing to delete %s tagging : %v", path, dbErr)
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
writeJsonQuiet(w, r, http.StatusAccepted, nil)
return
}