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package operation
import (
"bytes"
"crypto/md5"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"mime"
"mime/multipart"
"net/http"
"net/textproto"
"path/filepath"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/util"
)
type UploadResult struct {
Name string `json:"name,omitempty"`
Size uint32 `json:"size,omitempty"`
Error string `json:"error,omitempty"`
ETag string `json:"eTag,omitempty"`
CipherKey []byte `json:"cipherKey,omitempty"`
Mime string `json:"mime,omitempty"`
Gzip uint32 `json:"gzip,omitempty"`
Md5 string `json:"md5,omitempty"`
}
func (uploadResult *UploadResult) ToPbFileChunk(fileId string, offset int64) *filer_pb.FileChunk {
return &filer_pb.FileChunk{
FileId: fileId,
Offset: offset,
Size: uint64(uploadResult.Size),
Mtime: time.Now().UnixNano(),
ETag: uploadResult.ETag,
CipherKey: uploadResult.CipherKey,
IsCompressed: uploadResult.Gzip > 0,
}
}
var (
client *http.Client
)
func init() {
client = &http.Client{Transport: &http.Transport{
MaxIdleConnsPerHost: 1024,
}}
}
var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
// Upload sends a POST request to a volume server to upload the content with adjustable compression level
func UploadData(uploadUrl string, filename string, cipher bool, data []byte, isInputGzipped bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error) {
uploadResult, err = doUploadData(uploadUrl, filename, cipher, data, isInputGzipped, mtype, pairMap, jwt)
if uploadResult != nil {
uploadResult.Md5 = util.Md5(data)
}
return
}
// Upload sends a POST request to a volume server to upload the content with fast compression
func Upload(uploadUrl string, filename string, cipher bool, reader io.Reader, isInputGzipped bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error, data []byte) {
hash := md5.New()
reader = io.TeeReader(reader, hash)
uploadResult, err, data = doUpload(uploadUrl, filename, cipher, reader, isInputGzipped, mtype, pairMap, jwt)
if uploadResult != nil {
uploadResult.Md5 = fmt.Sprintf("%x", hash.Sum(nil))
}
return
}
func doUpload(uploadUrl string, filename string, cipher bool, reader io.Reader, isInputGzipped bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error, data []byte) {
data, err = ioutil.ReadAll(reader)
if err != nil {
err = fmt.Errorf("read input: %v", err)
return
}
uploadResult, uploadErr := doUploadData(uploadUrl, filename, cipher, data, isInputGzipped, mtype, pairMap, jwt)
return uploadResult, uploadErr, data
}
func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, isInputGzipped bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error) {
contentIsGzipped := isInputGzipped
shouldGzipNow := false
if !isInputGzipped {
if mtype == "" {
mtype = http.DetectContentType(data)
// println("detect1 mimetype to", mtype)
if mtype == "application/octet-stream" {
mtype = ""
}
}
if shouldBeCompressed, iAmSure := util.IsCompressableFileType(filepath.Base(filename), mtype); iAmSure && shouldBeCompressed {
shouldGzipNow = true
} else if !iAmSure && mtype == "" && len(data) > 128 {
var compressed []byte
compressed, err = util.GzipData(data[0:128])
shouldGzipNow = len(compressed)*10 < 128*9 // can not compress to less than 90%
}
}
var clearDataLen int
// gzip if possible
// this could be double copying
clearDataLen = len(data)
if shouldGzipNow {
compressed, compressErr := util.GzipData(data)
// fmt.Printf("data is compressed from %d ==> %d\n", len(data), len(compressed))
if compressErr == nil {
data = compressed
contentIsGzipped = true
}
} else if isInputGzipped {
// just to get the clear data length
clearData, err := util.DecompressData(data)
if err == nil {
clearDataLen = len(clearData)
}
}
if cipher {
// encrypt(gzip(data))
// encrypt
cipherKey := util.GenCipherKey()
encryptedData, encryptionErr := util.Encrypt(data, cipherKey)
if encryptionErr != nil {
err = fmt.Errorf("encrypt input: %v", encryptionErr)
return
}
// upload data
uploadResult, err = upload_content(uploadUrl, func(w io.Writer) (err error) {
_, err = w.Write(encryptedData)
return
}, "", false, len(encryptedData), "", nil, jwt)
if uploadResult != nil {
uploadResult.Name = filename
uploadResult.Mime = mtype
uploadResult.CipherKey = cipherKey
}
} else {
// upload data
uploadResult, err = upload_content(uploadUrl, func(w io.Writer) (err error) {
_, err = w.Write(data)
return
}, filename, contentIsGzipped, 0, mtype, pairMap, jwt)
}
if uploadResult == nil {
return
}
uploadResult.Size = uint32(clearDataLen)
if contentIsGzipped {
uploadResult.Gzip = 1
}
return uploadResult, err
}
func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error, filename string, isGzipped bool, originalDataSize int, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (*UploadResult, error) {
body_buf := bytes.NewBufferString("")
body_writer := multipart.NewWriter(body_buf)
h := make(textproto.MIMEHeader)
h.Set("Content-Disposition", fmt.Sprintf(`form-data; name="file"; filename="%s"`, fileNameEscaper.Replace(filename)))
if mtype == "" {
mtype = mime.TypeByExtension(strings.ToLower(filepath.Ext(filename)))
}
if mtype != "" {
h.Set("Content-Type", mtype)
}
if isGzipped {
h.Set("Content-Encoding", "gzip")
}
file_writer, cp_err := body_writer.CreatePart(h)
if cp_err != nil {
glog.V(0).Infoln("error creating form file", cp_err.Error())
return nil, cp_err
}
if err := fillBufferFunction(file_writer); err != nil {
glog.V(0).Infoln("error copying data", err)
return nil, err
}
content_type := body_writer.FormDataContentType()
if err := body_writer.Close(); err != nil {
glog.V(0).Infoln("error closing body", err)
return nil, err
}
req, postErr := http.NewRequest("POST", uploadUrl, body_buf)
if postErr != nil {
glog.V(0).Infoln("failing to upload to", uploadUrl, postErr.Error())
return nil, postErr
}
req.Header.Set("Content-Type", content_type)
for k, v := range pairMap {
req.Header.Set(k, v)
}
if jwt != "" {
req.Header.Set("Authorization", "BEARER "+string(jwt))
}
resp, post_err := client.Do(req)
if post_err != nil {
glog.V(0).Infoln("failing to upload to", uploadUrl, post_err.Error())
return nil, post_err
}
defer resp.Body.Close()
var ret UploadResult
etag := getEtag(resp)
if resp.StatusCode == http.StatusNoContent {
ret.ETag = etag
return &ret, nil
}
resp_body, ra_err := ioutil.ReadAll(resp.Body)
if ra_err != nil {
return nil, ra_err
}
unmarshal_err := json.Unmarshal(resp_body, &ret)
if unmarshal_err != nil {
glog.V(0).Infoln("failing to read upload response", uploadUrl, string(resp_body))
return nil, unmarshal_err
}
if ret.Error != "" {
return nil, errors.New(ret.Error)
}
ret.ETag = etag
return &ret, nil
}
func getEtag(r *http.Response) (etag string) {
etag = r.Header.Get("ETag")
if strings.HasPrefix(etag, "\"") && strings.HasSuffix(etag, "\"") {
etag = etag[1 : len(etag)-1]
}
return
}
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