seaweedfs/weed/server/filer_server_handlers_write.go
2018-05-27 11:52:26 -07:00

545 lines
16 KiB
Go

package weed_server
import (
"bytes"
"crypto/md5"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"net/textproto"
"net/url"
"path"
"strconv"
"strings"
"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/storage"
"github.com/chrislusf/seaweedfs/weed/util"
"time"
)
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"`
}
var quoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
func escapeQuotes(s string) string {
return quoteEscaper.Replace(s)
}
func createFormFile(writer *multipart.Writer, fieldname, filename, mime string) (io.Writer, error) {
h := make(textproto.MIMEHeader)
h.Set("Content-Disposition",
fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
escapeQuotes(fieldname), escapeQuotes(filename)))
if len(mime) == 0 {
mime = "application/octet-stream"
}
h.Set("Content-Type", mime)
return writer.CreatePart(h)
}
func makeFormData(filename, mimeType string, content io.Reader) (formData io.Reader, contentType string, err error) {
buf := new(bytes.Buffer)
writer := multipart.NewWriter(buf)
defer writer.Close()
part, err := createFormFile(writer, "file", filename, mimeType)
if err != nil {
glog.V(0).Infoln(err)
return
}
_, err = io.Copy(part, content)
if err != nil {
glog.V(0).Infoln(err)
return
}
formData = buf
contentType = writer.FormDataContentType()
return
}
func (fs *FilerServer) queryFileInfoByPath(w http.ResponseWriter, r *http.Request, path string) (fileId, urlLocation string, err error) {
var entry *filer2.Entry
if entry, err = fs.filer.FindEntry(filer2.FullPath(path)); err != nil {
glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
writeJsonError(w, r, http.StatusInternalServerError, err)
} else {
fileId = entry.Chunks[0].FileId
urlLocation, err = operation.LookupFileId(fs.getMasterNode(), fileId)
if err != nil {
glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
w.WriteHeader(http.StatusNotFound)
}
}
return
}
func (fs *FilerServer) assignNewFileInfo(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
ar := &operation.VolumeAssignRequest{
Count: 1,
Replication: replication,
Collection: collection,
Ttl: r.URL.Query().Get("ttl"),
}
assignResult, ae := operation.Assign(fs.getMasterNode(), ar)
if ae != nil {
glog.V(0).Infoln("failing to assign a file id", ae.Error())
writeJsonError(w, r, http.StatusInternalServerError, ae)
err = ae
return
}
fileId = assignResult.Fid
urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
return
}
func (fs *FilerServer) multipartUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
//Default handle way for http multipart
if r.Method == "PUT" {
buf, _ := ioutil.ReadAll(r.Body)
r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
fileName, _, _, _, _, _, _, _, pe := storage.ParseUpload(r)
if pe != nil {
glog.V(0).Infoln("failing to parse post body", pe.Error())
writeJsonError(w, r, http.StatusInternalServerError, pe)
err = pe
return
}
//reconstruct http request body for following new request to volume server
r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
path := r.URL.Path
if strings.HasSuffix(path, "/") {
if fileName != "" {
path += fileName
}
}
fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path)
} else {
fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
}
return
}
func multipartHttpBodyBuilder(w http.ResponseWriter, r *http.Request, fileName string) (err error) {
body, contentType, te := makeFormData(fileName, r.Header.Get("Content-Type"), r.Body)
if te != nil {
glog.V(0).Infoln("S3 protocol to raw seaweed protocol failed", te.Error())
writeJsonError(w, r, http.StatusInternalServerError, te)
err = te
return
}
if body != nil {
switch v := body.(type) {
case *bytes.Buffer:
r.ContentLength = int64(v.Len())
case *bytes.Reader:
r.ContentLength = int64(v.Len())
case *strings.Reader:
r.ContentLength = int64(v.Len())
}
}
r.Header.Set("Content-Type", contentType)
rc, ok := body.(io.ReadCloser)
if !ok && body != nil {
rc = ioutil.NopCloser(body)
}
r.Body = rc
return
}
func checkContentMD5(w http.ResponseWriter, r *http.Request) (err error) {
if contentMD5 := r.Header.Get("Content-MD5"); contentMD5 != "" {
buf, _ := ioutil.ReadAll(r.Body)
//checkMD5
sum := md5.Sum(buf)
fileDataMD5 := base64.StdEncoding.EncodeToString(sum[0:len(sum)])
if strings.ToLower(fileDataMD5) != strings.ToLower(contentMD5) {
glog.V(0).Infof("fileDataMD5 [%s] is not equal to Content-MD5 [%s]", fileDataMD5, contentMD5)
err = fmt.Errorf("MD5 check failed")
writeJsonError(w, r, http.StatusNotAcceptable, err)
return
}
//reconstruct http request body for following new request to volume server
r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
}
return
}
func (fs *FilerServer) monolithicUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
/*
Amazon S3 ref link:[http://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html]
There is a long way to provide a completely compatibility against all Amazon S3 API, I just made
a simple data stream adapter between S3 PUT API and seaweedfs's volume storage Write API
1. The request url format should be http://$host:$port/$bucketName/$objectName
2. bucketName will be mapped to seaweedfs's collection name
3. You could customize and make your enhancement.
*/
lastPos := strings.LastIndex(r.URL.Path, "/")
if lastPos == -1 || lastPos == 0 || lastPos == len(r.URL.Path)-1 {
glog.V(0).Infoln("URL Path [%s] is invalid, could not retrieve file name", r.URL.Path)
err = fmt.Errorf("URL Path is invalid")
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
if err = checkContentMD5(w, r); err != nil {
return
}
fileName := r.URL.Path[lastPos+1:]
if err = multipartHttpBodyBuilder(w, r, fileName); err != nil {
return
}
secondPos := strings.Index(r.URL.Path[1:], "/") + 1
collection = r.URL.Path[1:secondPos]
path := r.URL.Path
if fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path); err == nil && fileId == "" {
fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
}
return
}
func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
query := r.URL.Query()
replication := query.Get("replication")
if replication == "" {
replication = fs.defaultReplication
}
collection := query.Get("collection")
if collection == "" {
collection = fs.collection
}
if autoChunked := fs.autoChunk(w, r, replication, collection); autoChunked {
return
}
var fileId, urlLocation string
var err error
if strings.HasPrefix(r.Header.Get("Content-Type"), "multipart/form-data; boundary=") {
fileId, urlLocation, err = fs.multipartUploadAnalyzer(w, r, replication, collection)
if err != nil {
return
}
} else {
fileId, urlLocation, err = fs.monolithicUploadAnalyzer(w, r, replication, collection)
if err != nil {
return
}
}
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()
}
glog.V(4).Infoln("post to", u)
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.V(0).Infoln("failing to connect to volume server", r.RequestURI, do_err.Error())
writeJsonError(w, r, http.StatusInternalServerError, do_err)
return
}
defer resp.Body.Close()
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
}
path := r.URL.Path
if strings.HasSuffix(path, "/") {
if ret.Name != "" {
path += ret.Name
} else {
operation.DeleteFile(fs.getMasterNode(), fileId, fs.jwt(fileId)) //clean up
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
}
}
// also delete the old fid unless PUT operation
if r.Method != "PUT" {
if entry, err := fs.filer.FindEntry(filer2.FullPath(path)); err == nil {
oldFid := entry.Chunks[0].FileId
operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
} else if err != nil && err != filer2.ErrNotFound {
glog.V(0).Infof("error %v occur when finding %s in filer store", err, path)
}
}
glog.V(4).Infoln("saving", path, "=>", fileId)
entry := &filer2.Entry{
FullPath: filer2.FullPath(path),
Attr: filer2.Attr{
Mode: 0660,
},
Chunks: []*filer_pb.FileChunk{{
FileId: fileId,
Size: uint64(r.ContentLength),
Mtime: time.Now().UnixNano(),
}},
}
if db_err := fs.filer.CreateEntry(entry); db_err != nil {
operation.DeleteFile(fs.getMasterNode(), fileId, fs.jwt(fileId)) //clean up
glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
writeJsonError(w, r, http.StatusInternalServerError, db_err)
return
}
reply := FilerPostResult{
Name: ret.Name,
Size: ret.Size,
Error: ret.Error,
Fid: fileId,
Url: urlLocation,
}
writeJsonQuiet(w, r, http.StatusCreated, reply)
}
func (fs *FilerServer) autoChunk(w http.ResponseWriter, r *http.Request, replication string, collection string) bool {
if r.Method != "POST" {
glog.V(4).Infoln("AutoChunking not supported for method", r.Method)
return false
}
// autoChunking can be set at the command-line level or as a query param. Query param overrides command-line
query := r.URL.Query()
parsedMaxMB, _ := strconv.ParseInt(query.Get("maxMB"), 10, 32)
maxMB := int32(parsedMaxMB)
if maxMB <= 0 && fs.maxMB > 0 {
maxMB = int32(fs.maxMB)
}
if maxMB <= 0 {
glog.V(4).Infoln("AutoChunking not enabled")
return false
}
glog.V(4).Infoln("AutoChunking level set to", maxMB, "(MB)")
chunkSize := 1024 * 1024 * maxMB
contentLength := int64(0)
if contentLengthHeader := r.Header["Content-Length"]; len(contentLengthHeader) == 1 {
contentLength, _ = strconv.ParseInt(contentLengthHeader[0], 10, 64)
if contentLength <= int64(chunkSize) {
glog.V(4).Infoln("Content-Length of", contentLength, "is less than the chunk size of", chunkSize, "so autoChunking will be skipped.")
return false
}
}
if contentLength <= 0 {
glog.V(4).Infoln("Content-Length value is missing or unexpected so autoChunking will be skipped.")
return false
}
reply, err := fs.doAutoChunk(w, r, contentLength, chunkSize, replication, collection)
if err != nil {
writeJsonError(w, r, http.StatusInternalServerError, err)
} else if reply != nil {
writeJsonQuiet(w, r, http.StatusCreated, reply)
}
return true
}
func (fs *FilerServer) doAutoChunk(w http.ResponseWriter, r *http.Request, contentLength int64, chunkSize int32, replication string, collection string) (filerResult *FilerPostResult, replyerr error) {
multipartReader, multipartReaderErr := r.MultipartReader()
if multipartReaderErr != nil {
return nil, multipartReaderErr
}
part1, part1Err := multipartReader.NextPart()
if part1Err != nil {
return nil, part1Err
}
fileName := part1.FileName()
if fileName != "" {
fileName = path.Base(fileName)
}
var fileChunks []*filer_pb.FileChunk
totalBytesRead := int64(0)
tmpBufferSize := int32(1024 * 1024)
tmpBuffer := bytes.NewBuffer(make([]byte, 0, tmpBufferSize))
chunkBuf := make([]byte, chunkSize+tmpBufferSize, chunkSize+tmpBufferSize) // chunk size plus a little overflow
chunkBufOffset := int32(0)
chunkOffset := int64(0)
writtenChunks := 0
filerResult = &FilerPostResult{
Name: fileName,
}
for totalBytesRead < contentLength {
tmpBuffer.Reset()
bytesRead, readErr := io.CopyN(tmpBuffer, part1, int64(tmpBufferSize))
readFully := readErr != nil && readErr == io.EOF
tmpBuf := tmpBuffer.Bytes()
bytesToCopy := tmpBuf[0:int(bytesRead)]
copy(chunkBuf[chunkBufOffset:chunkBufOffset+int32(bytesRead)], bytesToCopy)
chunkBufOffset = chunkBufOffset + int32(bytesRead)
if chunkBufOffset >= chunkSize || readFully || (chunkBufOffset > 0 && bytesRead == 0) {
writtenChunks = writtenChunks + 1
fileId, urlLocation, assignErr := fs.assignNewFileInfo(w, r, replication, collection)
if assignErr != nil {
return nil, assignErr
}
// upload the chunk to the volume server
chunkName := fileName + "_chunk_" + strconv.FormatInt(int64(len(fileChunks)+1), 10)
uploadErr := fs.doUpload(urlLocation, w, r, chunkBuf[0:chunkBufOffset], chunkName, "application/octet-stream", fileId)
if uploadErr != nil {
return nil, uploadErr
}
// Save to chunk manifest structure
fileChunks = append(fileChunks,
&filer_pb.FileChunk{
FileId: fileId,
Offset: chunkOffset,
Size: uint64(chunkBufOffset),
Mtime: time.Now().UnixNano(),
},
)
// reset variables for the next chunk
chunkBufOffset = 0
chunkOffset = totalBytesRead + int64(bytesRead)
}
totalBytesRead = totalBytesRead + int64(bytesRead)
if bytesRead == 0 || readFully {
break
}
if readErr != nil {
return nil, readErr
}
}
path := r.URL.Path
// also delete the old fid unless PUT operation
if r.Method != "PUT" {
if entry, err := fs.filer.FindEntry(filer2.FullPath(path)); err == nil {
for _, chunk := range entry.Chunks {
oldFid := chunk.FileId
operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
}
} else if err != nil {
glog.V(0).Infof("error %v occur when finding %s in filer store", err, path)
}
}
glog.V(4).Infoln("saving", path)
entry := &filer2.Entry{
FullPath: filer2.FullPath(path),
Attr: filer2.Attr{
Mode: 0660,
},
Chunks: fileChunks,
}
if db_err := fs.filer.CreateEntry(entry); db_err != nil {
replyerr = db_err
filerResult.Error = db_err.Error()
glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
return
}
return
}
func (fs *FilerServer) doUpload(urlLocation string, w http.ResponseWriter, r *http.Request, chunkBuf []byte, fileName string, contentType string, fileId string) (err error) {
err = nil
ioReader := ioutil.NopCloser(bytes.NewBuffer(chunkBuf))
uploadResult, uploadError := operation.Upload(urlLocation, fileName, ioReader, false, contentType, nil, fs.jwt(fileId))
if uploadResult != nil {
glog.V(0).Infoln("Chunk upload result. Name:", uploadResult.Name, "Fid:", fileId, "Size:", uploadResult.Size)
}
if uploadError != nil {
err = uploadError
}
return
}
// curl -X DELETE http://localhost:8888/path/to
func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
entry, err := fs.filer.DeleteEntry(filer2.FullPath(r.URL.Path))
if err != nil {
glog.V(4).Infoln("deleting", r.URL.Path, ":", err.Error())
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
if entry != nil && !entry.IsDirectory() {
for _, chunk := range entry.Chunks {
oldFid := chunk.FileId
operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
}
}
writeJsonQuiet(w, r, http.StatusAccepted, map[string]string{"error": ""})
}