seaweedfs/weed/server/filer_server_handlers_write.go

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package weed_server
import (
"encoding/json"
"errors"
"io/ioutil"
"net/http"
"net/url"
"strconv"
"strings"
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"time"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/util"
"os"
)
var (
OS_UID = uint32(os.Getuid())
OS_GID = uint32(os.Getgid())
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)
type FilerPostResult struct {
Name string `json:"name,omitempty"`
Size uint32 `json:"size,omitempty"`
Error string `json:"error,omitempty"`
Fid string `json:"fid,omitempty"`
Url string `json:"url,omitempty"`
}
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func (fs *FilerServer) queryFileInfoByPath(w http.ResponseWriter, r *http.Request, path string) (fileId, urlLocation string, err error) {
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var entry *filer2.Entry
entry, err = fs.filer.FindEntry(filer2.FullPath(path))
if err == filer2.ErrNotFound {
return "", "", nil
}
if err != nil {
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glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
if len(entry.Chunks) == 0 {
glog.V(1).Infof("empty entry: %s", path)
w.WriteHeader(http.StatusNoContent)
} else {
fileId = entry.Chunks[0].FileId
urlLocation, err = fs.filer.MasterClient.LookupFileId(fileId)
if err != nil {
glog.V(1).Infof("operation LookupFileId %s failed, err is %s", fileId, err.Error())
w.WriteHeader(http.StatusNotFound)
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}
}
return
}
func (fs *FilerServer) assignNewFileInfo(w http.ResponseWriter, r *http.Request, replication, collection string, dataCenter string) (fileId, urlLocation string, err error) {
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ar := &operation.VolumeAssignRequest{
Count: 1,
Replication: replication,
Collection: collection,
Ttl: r.URL.Query().Get("ttl"),
DataCenter: dataCenter,
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}
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var altRequest *operation.VolumeAssignRequest
if dataCenter != "" {
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altRequest = &operation.VolumeAssignRequest{
Count: 1,
Replication: replication,
Collection: collection,
Ttl: r.URL.Query().Get("ttl"),
DataCenter: "",
}
}
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assignResult, ae := operation.Assign(fs.filer.GetMaster(), ar, altRequest)
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if ae != nil {
glog.Errorf("failing to assign a file id: %v", ae)
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writeJsonError(w, r, http.StatusInternalServerError, ae)
err = ae
return
}
fileId = assignResult.Fid
urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
return
}
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func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
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query := r.URL.Query()
replication := query.Get("replication")
if replication == "" {
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replication = fs.option.DefaultReplication
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}
collection := query.Get("collection")
if collection == "" {
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collection = fs.option.Collection
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}
dataCenter := query.Get("dataCenter")
if dataCenter == "" {
dataCenter = fs.option.DataCenter
}
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if autoChunked := fs.autoChunk(w, r, replication, collection, dataCenter); autoChunked {
return
}
fileId, urlLocation, err := fs.queryFileInfoByPath(w, r, r.URL.Path)
if err == nil && fileId == "" {
fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection, dataCenter)
}
if err != nil || fileId == "" || urlLocation == "" {
return
}
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glog.V(4).Infof("write %s to %v", r.URL.Path, urlLocation)
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u, _ := url.Parse(urlLocation)
// This allows a client to generate a chunk manifest and submit it to the filer -- it is a little off
// because they need to provide FIDs instead of file paths...
cm, _ := strconv.ParseBool(query.Get("cm"))
if cm {
q := u.Query()
q.Set("cm", "true")
u.RawQuery = q.Encode()
}
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glog.V(4).Infoln("post to", u)
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// send request to volume server
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request := &http.Request{
Method: r.Method,
URL: u,
Proto: r.Proto,
ProtoMajor: r.ProtoMajor,
ProtoMinor: r.ProtoMinor,
Header: r.Header,
Body: r.Body,
Host: r.Host,
ContentLength: r.ContentLength,
}
resp, do_err := util.Do(request)
if do_err != nil {
glog.Errorf("failing to connect to volume server %s: %v, %+v", r.RequestURI, do_err, r.Method)
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writeJsonError(w, r, http.StatusInternalServerError, do_err)
return
}
defer resp.Body.Close()
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etag := resp.Header.Get("ETag")
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resp_body, ra_err := ioutil.ReadAll(resp.Body)
if ra_err != nil {
glog.V(0).Infoln("failing to upload to volume server", r.RequestURI, ra_err.Error())
writeJsonError(w, r, http.StatusInternalServerError, ra_err)
return
}
glog.V(4).Infoln("post result", string(resp_body))
var ret operation.UploadResult
unmarshal_err := json.Unmarshal(resp_body, &ret)
if unmarshal_err != nil {
glog.V(0).Infoln("failing to read upload resonse", r.RequestURI, string(resp_body))
writeJsonError(w, r, http.StatusInternalServerError, unmarshal_err)
return
}
if ret.Error != "" {
glog.V(0).Infoln("failing to post to volume server", r.RequestURI, ret.Error)
writeJsonError(w, r, http.StatusInternalServerError, errors.New(ret.Error))
return
}
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// find correct final path
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path := r.URL.Path
if strings.HasSuffix(path, "/") {
if ret.Name != "" {
path += ret.Name
} else {
fs.filer.DeleteFileByFileId(fileId)
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glog.V(0).Infoln("Can not to write to folder", path, "without a file name!")
writeJsonError(w, r, http.StatusInternalServerError,
errors.New("Can not to write to folder "+path+" without a file name"))
return
}
}
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// update metadata in filer store
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glog.V(4).Infoln("saving", path, "=>", fileId)
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existingEntry, err := fs.filer.FindEntry(filer2.FullPath(path))
crTime := time.Now()
if err == nil && existingEntry != nil {
if existingEntry.IsDirectory() {
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path += "/" + ret.Name
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} else {
crTime = existingEntry.Crtime
}
}
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entry := &filer2.Entry{
FullPath: filer2.FullPath(path),
Attr: filer2.Attr{
Mtime: time.Now(),
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Crtime: crTime,
Mode: 0660,
Uid: OS_UID,
Gid: OS_GID,
Replication: replication,
Collection: collection,
TtlSec: int32(util.ParseInt(r.URL.Query().Get("ttl"), 0)),
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},
Chunks: []*filer_pb.FileChunk{{
FileId: fileId,
Size: uint64(ret.Size),
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Mtime: time.Now().UnixNano(),
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ETag: etag,
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}},
}
if db_err := fs.filer.CreateEntry(entry); db_err != nil {
fs.filer.DeleteFileByFileId(fileId)
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glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
writeJsonError(w, r, http.StatusInternalServerError, db_err)
return
}
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// send back post result
reply := FilerPostResult{
Name: ret.Name,
Size: ret.Size,
Error: ret.Error,
Fid: fileId,
Url: urlLocation,
}
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setEtag(w, etag)
writeJsonQuiet(w, r, http.StatusCreated, reply)
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}
// curl -X DELETE http://localhost:8888/path/to
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// curl -X DELETE http://localhost:8888/path/to?recursive=true
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func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
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isRecursive := r.FormValue("recursive") == "true"
err := fs.filer.DeleteEntryMetaAndData(filer2.FullPath(r.URL.Path), isRecursive, true)
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if err != nil {
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glog.V(1).Infoln("deleting", r.URL.Path, ":", err.Error())
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writeJsonError(w, r, http.StatusInternalServerError, err)
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return
}
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w.WriteHeader(http.StatusNoContent)
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}