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|
package needle
import (
"bytes"
"crypto/md5"
"encoding/base64"
"fmt"
"io"
"mime"
"net/http"
"path"
"path/filepath"
"strconv"
"strings"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/util"
)
type ParsedUpload struct {
FileName string
Data []byte
bytesBuffer *bytes.Buffer
MimeType string
PairMap map[string]string
IsGzipped bool
// IsZstd bool
OriginalDataSize int
ModifiedTime uint64
Ttl *TTL
IsChunkedFile bool
UncompressedData []byte
ContentMd5 string
}
func ParseUpload(r *http.Request, sizeLimit int64, bytesBuffer *bytes.Buffer) (pu *ParsedUpload, e error) {
bytesBuffer.Reset()
pu = &ParsedUpload{bytesBuffer: bytesBuffer}
pu.PairMap = make(map[string]string)
for k, v := range r.Header {
if len(v) > 0 && strings.HasPrefix(k, PairNamePrefix) {
pu.PairMap[k] = v[0]
}
}
e = parseUpload(r, sizeLimit, pu)
if e != nil {
return
}
pu.ModifiedTime, _ = strconv.ParseUint(r.FormValue("ts"), 10, 64)
pu.Ttl, _ = ReadTTL(r.FormValue("ttl"))
pu.OriginalDataSize = len(pu.Data)
pu.UncompressedData = pu.Data
// println("received data", len(pu.Data), "isGzipped", pu.IsGzipped, "mime", pu.MimeType, "name", pu.FileName)
if pu.IsGzipped {
if unzipped, e := util.DecompressData(pu.Data); e == nil {
pu.OriginalDataSize = len(unzipped)
pu.UncompressedData = unzipped
// println("ungzipped data size", len(unzipped))
}
} else {
ext := filepath.Base(pu.FileName)
mimeType := pu.MimeType
if mimeType == "" {
mimeType = http.DetectContentType(pu.Data)
}
// println("detected mimetype to", pu.MimeType)
if mimeType == "application/octet-stream" {
mimeType = ""
}
if shouldBeCompressed, iAmSure := util.IsCompressableFileType(ext, mimeType); shouldBeCompressed && iAmSure {
// println("ext", ext, "iAmSure", iAmSure, "shouldBeCompressed", shouldBeCompressed, "mimeType", pu.MimeType)
if compressedData, err := util.GzipData(pu.Data); err == nil {
if len(compressedData)*10 < len(pu.Data)*9 {
pu.Data = compressedData
pu.IsGzipped = true
}
// println("gzipped data size", len(compressedData))
}
}
}
// md5
h := md5.New()
h.Write(pu.UncompressedData)
pu.ContentMd5 = base64.StdEncoding.EncodeToString(h.Sum(nil))
if expectedChecksum := r.Header.Get("Content-MD5"); expectedChecksum != "" {
if expectedChecksum != pu.ContentMd5 {
e = fmt.Errorf("Content-MD5 did not match md5 of file data expected [%s] received [%s] size %d", expectedChecksum, pu.ContentMd5, len(pu.UncompressedData))
return
}
}
return
}
func parseUpload(r *http.Request, sizeLimit int64, pu *ParsedUpload) (e error) {
defer func() {
if e != nil && r.Body != nil {
io.Copy(io.Discard, r.Body)
r.Body.Close()
}
}()
contentType := r.Header.Get("Content-Type")
var dataSize int64
if r.Method == http.MethodPost && (contentType == "" || strings.Contains(contentType, "form-data")) {
form, fe := r.MultipartReader()
if fe != nil {
glog.V(0).Infoln("MultipartReader [ERROR]", fe)
e = fe
return
}
// first multi-part item
part, fe := form.NextPart()
if fe != nil {
glog.V(0).Infoln("Reading Multi part [ERROR]", fe)
e = fe
return
}
pu.FileName = part.FileName()
if pu.FileName != "" {
pu.FileName = util.CleanWindowsPathBase(pu.FileName)
}
dataSize, e = pu.bytesBuffer.ReadFrom(io.LimitReader(part, sizeLimit+1))
if e != nil {
glog.V(0).Infoln("Reading Content [ERROR]", e)
return
}
if dataSize == sizeLimit+1 {
e = fmt.Errorf("file over the limited %d bytes", sizeLimit)
return
}
pu.Data = pu.bytesBuffer.Bytes()
contentType = part.Header.Get("Content-Type")
// if the filename is empty string, do a search on the other multi-part items
for pu.FileName == "" {
part2, fe := form.NextPart()
if fe != nil {
break // no more or on error, just safely break
}
fName := part2.FileName()
// found the first <file type> multi-part has filename
if fName != "" {
pu.bytesBuffer.Reset()
dataSize2, fe2 := pu.bytesBuffer.ReadFrom(io.LimitReader(part2, sizeLimit+1))
if fe2 != nil {
glog.V(0).Infoln("Reading Content [ERROR]", fe2)
e = fe2
return
}
if dataSize2 == sizeLimit+1 {
e = fmt.Errorf("file over the limited %d bytes", sizeLimit)
return
}
// update
pu.Data = pu.bytesBuffer.Bytes()
pu.FileName = util.CleanWindowsPathBase(fName)
contentType = part.Header.Get("Content-Type")
part = part2
break
}
}
pu.IsGzipped = part.Header.Get("Content-Encoding") == "gzip"
// pu.IsZstd = part.Header.Get("Content-Encoding") == "zstd"
} else {
disposition := r.Header.Get("Content-Disposition")
if strings.Contains(disposition, "name=") {
if !strings.HasPrefix(disposition, "inline") && !strings.HasPrefix(disposition, "attachment") {
disposition = "attachment; " + disposition
}
_, mediaTypeParams, err := mime.ParseMediaType(disposition)
if err == nil {
dpFilename, hasFilename := mediaTypeParams["filename"]
dpName, hasName := mediaTypeParams["name"]
if hasFilename {
pu.FileName = dpFilename
} else if hasName {
pu.FileName = dpName
}
}
} else {
pu.FileName = ""
}
if pu.FileName != "" {
pu.FileName = util.CleanWindowsPathBase(pu.FileName)
} else {
pu.FileName = path.Base(r.URL.Path)
}
dataSize, e = pu.bytesBuffer.ReadFrom(io.LimitReader(r.Body, sizeLimit+1))
if e != nil {
glog.V(0).Infoln("Reading Content [ERROR]", e)
return
}
if dataSize == sizeLimit+1 {
e = fmt.Errorf("file over the limited %d bytes", sizeLimit)
return
}
pu.Data = pu.bytesBuffer.Bytes()
pu.MimeType = contentType
pu.IsGzipped = r.Header.Get("Content-Encoding") == "gzip"
// pu.IsZstd = r.Header.Get("Content-Encoding") == "zstd"
}
pu.IsChunkedFile, _ = strconv.ParseBool(r.FormValue("cm"))
if !pu.IsChunkedFile {
dotIndex := strings.LastIndex(pu.FileName, ".")
ext, mtype := "", ""
if dotIndex > 0 {
ext = strings.ToLower(pu.FileName[dotIndex:])
mtype = mime.TypeByExtension(ext)
}
if contentType != "" && contentType != "application/octet-stream" && mtype != contentType {
pu.MimeType = contentType // only return mime type if not deducible
} else if mtype != "" && pu.MimeType == "" && mtype != "application/octet-stream" {
pu.MimeType = mtype
}
}
return
}
|
