mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
343 lines
10 KiB
Go
343 lines
10 KiB
Go
package weed_server
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import (
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"bytes"
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"crypto/md5"
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"encoding/base64"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"mime/multipart"
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"net/http"
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"net/textproto"
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"net/url"
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"strings"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/storage"
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"github.com/chrislusf/seaweedfs/weed/util"
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"github.com/syndtr/goleveldb/leveldb"
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)
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type FilerPostResult struct {
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Name string `json:"name,omitempty"`
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Size uint32 `json:"size,omitempty"`
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Error string `json:"error,omitempty"`
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Fid string `json:"fid,omitempty"`
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Url string `json:"url,omitempty"`
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}
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var quoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
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func escapeQuotes(s string) string {
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return quoteEscaper.Replace(s)
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}
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func createFormFile(writer *multipart.Writer, fieldname, filename, mime string) (io.Writer, error) {
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h := make(textproto.MIMEHeader)
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h.Set("Content-Disposition",
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fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
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escapeQuotes(fieldname), escapeQuotes(filename)))
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if len(mime) == 0 {
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mime = "application/octet-stream"
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}
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h.Set("Content-Type", mime)
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return writer.CreatePart(h)
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}
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func makeFormData(filename, mimeType string, content io.Reader) (formData io.Reader, contentType string, err error) {
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buf := new(bytes.Buffer)
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writer := multipart.NewWriter(buf)
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defer writer.Close()
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part, err := createFormFile(writer, "file", filename, mimeType)
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if err != nil {
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glog.V(0).Infoln(err)
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return
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}
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_, err = io.Copy(part, content)
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if err != nil {
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glog.V(0).Infoln(err)
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return
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}
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formData = buf
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contentType = writer.FormDataContentType()
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return
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}
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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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if fileId, err = fs.filer.FindFile(path); err != nil && err != leveldb.ErrNotFound {
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glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
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writeJsonError(w, r, http.StatusInternalServerError, err)
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return
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} else if fileId != "" && err == nil {
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urlLocation, err = operation.LookupFileId(fs.getMasterNode(), fileId)
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if err != nil {
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glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
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w.WriteHeader(http.StatusNotFound)
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return
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}
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}
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return
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}
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func (fs *FilerServer) assignNewFileInfo(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
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ar := &operation.VolumeAssignRequest{
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Count: 1,
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Replication: replication,
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Collection: collection,
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Ttl: r.URL.Query().Get("ttl"),
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}
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assignResult, ae := operation.Assign(fs.getMasterNode(), ar)
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if ae != nil {
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glog.V(0).Infoln("failing to assign a file id", ae.Error())
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writeJsonError(w, r, http.StatusInternalServerError, ae)
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err = ae
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return
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}
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fileId = assignResult.Fid
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urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
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return
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}
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func (fs *FilerServer) multipartUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
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//Default handle way for http multipart
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if r.Method == "PUT" {
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buf, _ := ioutil.ReadAll(r.Body)
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r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
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fileName, _, _, _, _, _, _, pe := storage.ParseUpload(r)
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if pe != nil {
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glog.V(0).Infoln("failing to parse post body", pe.Error())
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writeJsonError(w, r, http.StatusInternalServerError, pe)
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err = pe
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return
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}
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//reconstruct http request body for following new request to volume server
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r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
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path := r.URL.Path
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if strings.HasSuffix(path, "/") {
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if fileName != "" {
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path += fileName
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}
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}
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fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path)
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} else {
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fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
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}
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return
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}
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func multipartHttpBodyBuilder(w http.ResponseWriter, r *http.Request, fileName string) (err error) {
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body, contentType, te := makeFormData(fileName, r.Header.Get("Content-Type"), r.Body)
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if te != nil {
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glog.V(0).Infoln("S3 protocol to raw seaweed protocol failed", te.Error())
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writeJsonError(w, r, http.StatusInternalServerError, te)
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err = te
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return
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}
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if body != nil {
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switch v := body.(type) {
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case *bytes.Buffer:
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r.ContentLength = int64(v.Len())
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case *bytes.Reader:
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r.ContentLength = int64(v.Len())
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case *strings.Reader:
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r.ContentLength = int64(v.Len())
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}
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}
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r.Header.Set("Content-Type", contentType)
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rc, ok := body.(io.ReadCloser)
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if !ok && body != nil {
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rc = ioutil.NopCloser(body)
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}
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r.Body = rc
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return
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}
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func checkContentMD5(w http.ResponseWriter, r *http.Request) (err error) {
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if contentMD5 := r.Header.Get("Content-MD5"); contentMD5 != "" {
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buf, _ := ioutil.ReadAll(r.Body)
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//checkMD5
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sum := md5.Sum(buf)
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fileDataMD5 := base64.StdEncoding.EncodeToString(sum[0:len(sum)])
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if strings.ToLower(fileDataMD5) != strings.ToLower(contentMD5) {
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glog.V(0).Infof("fileDataMD5 [%s] is not equal to Content-MD5 [%s]", fileDataMD5, contentMD5)
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err = fmt.Errorf("MD5 check failed")
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writeJsonError(w, r, http.StatusNotAcceptable, err)
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return
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}
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//reconstruct http request body for following new request to volume server
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r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
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}
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return
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}
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func (fs *FilerServer) monolithicUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
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/*
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Amazon S3 ref link:[http://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html]
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There is a long way to provide a completely compatibility against all Amazon S3 API, I just made
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a simple data stream adapter between S3 PUT API and seaweedfs's volume storage Write API
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1. The request url format should be http://$host:$port/$bucketName/$objectName
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2. bucketName will be mapped to seaweedfs's collection name
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3. You could customize and make your enhancement.
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*/
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lastPos := strings.LastIndex(r.URL.Path, "/")
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if lastPos == -1 || lastPos == 0 || lastPos == len(r.URL.Path)-1 {
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glog.V(0).Infoln("URL Path [%s] is invalid, could not retrieve file name", r.URL.Path)
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err = fmt.Errorf("URL Path is invalid")
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writeJsonError(w, r, http.StatusInternalServerError, err)
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return
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}
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if err = checkContentMD5(w, r); err != nil {
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return
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}
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fileName := r.URL.Path[lastPos+1:]
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if err = multipartHttpBodyBuilder(w, r, fileName); err != nil {
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return
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}
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secondPos := strings.Index(r.URL.Path[1:], "/") + 1
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collection = r.URL.Path[1:secondPos]
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path := r.URL.Path
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if fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path); err == nil && fileId == "" {
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fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
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}
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return
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}
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func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
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query := r.URL.Query()
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replication := query.Get("replication")
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if replication == "" {
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replication = fs.defaultReplication
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}
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collection := query.Get("collection")
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if collection == "" {
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collection = fs.collection
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}
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var fileId, urlLocation string
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var err error
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if strings.HasPrefix(r.Header.Get("Content-Type"), "multipart/form-data; boundary=") {
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fileId, urlLocation, err = fs.multipartUploadAnalyzer(w, r, replication, collection)
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if err != nil {
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return
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}
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} else {
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fileId, urlLocation, err = fs.monolithicUploadAnalyzer(w, r, replication, collection)
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if err != nil {
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return
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}
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}
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u, _ := url.Parse(urlLocation)
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glog.V(4).Infoln("post to", u)
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request := &http.Request{
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Method: r.Method,
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URL: u,
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Proto: r.Proto,
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ProtoMajor: r.ProtoMajor,
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ProtoMinor: r.ProtoMinor,
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Header: r.Header,
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Body: r.Body,
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Host: r.Host,
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ContentLength: r.ContentLength,
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}
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resp, do_err := util.Do(request)
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if do_err != nil {
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glog.V(0).Infoln("failing to connect to volume server", r.RequestURI, do_err.Error())
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writeJsonError(w, r, http.StatusInternalServerError, do_err)
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return
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}
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defer resp.Body.Close()
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resp_body, ra_err := ioutil.ReadAll(resp.Body)
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if ra_err != nil {
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glog.V(0).Infoln("failing to upload to volume server", r.RequestURI, ra_err.Error())
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writeJsonError(w, r, http.StatusInternalServerError, ra_err)
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return
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}
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glog.V(4).Infoln("post result", string(resp_body))
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var ret operation.UploadResult
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unmarshal_err := json.Unmarshal(resp_body, &ret)
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if unmarshal_err != nil {
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glog.V(0).Infoln("failing to read upload resonse", r.RequestURI, string(resp_body))
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writeJsonError(w, r, http.StatusInternalServerError, unmarshal_err)
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return
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}
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if ret.Error != "" {
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glog.V(0).Infoln("failing to post to volume server", r.RequestURI, ret.Error)
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writeJsonError(w, r, http.StatusInternalServerError, errors.New(ret.Error))
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return
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}
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path := r.URL.Path
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if strings.HasSuffix(path, "/") {
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if ret.Name != "" {
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path += ret.Name
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} else {
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operation.DeleteFile(fs.getMasterNode(), fileId, fs.jwt(fileId)) //clean up
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glog.V(0).Infoln("Can not to write to folder", path, "without a file name!")
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writeJsonError(w, r, http.StatusInternalServerError,
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errors.New("Can not to write to folder "+path+" without a file name"))
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return
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}
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}
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// also delete the old fid unless PUT operation
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if r.Method != "PUT" {
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if oldFid, err := fs.filer.FindFile(path); err == nil {
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operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
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}
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}
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glog.V(4).Infoln("saving", path, "=>", fileId)
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if db_err := fs.filer.CreateFile(path, fileId); db_err != nil {
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operation.DeleteFile(fs.getMasterNode(), fileId, fs.jwt(fileId)) //clean up
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glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
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writeJsonError(w, r, http.StatusInternalServerError, db_err)
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return
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}
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reply := FilerPostResult{
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Name: ret.Name,
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Size: ret.Size,
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Error: ret.Error,
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Fid: fileId,
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Url: urlLocation,
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}
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writeJsonQuiet(w, r, http.StatusCreated, reply)
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}
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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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var err error
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var fid string
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if strings.HasSuffix(r.URL.Path, "/") {
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isRecursive := r.FormValue("recursive") == "true"
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err = fs.filer.DeleteDirectory(r.URL.Path, isRecursive)
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} else {
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fid, err = fs.filer.DeleteFile(r.URL.Path)
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if err == nil && fid != "" {
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err = operation.DeleteFile(fs.getMasterNode(), fid, fs.jwt(fid))
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}
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}
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if err == nil {
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writeJsonQuiet(w, r, http.StatusAccepted, map[string]string{"error": ""})
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} else {
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glog.V(4).Infoln("deleting", r.URL.Path, ":", err.Error())
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writeJsonError(w, r, http.StatusInternalServerError, err)
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}
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}
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