gma write/reader + common stuff

master
cheetah 2 years ago
parent 429dc0a704
commit b0941f1e38

@ -0,0 +1,130 @@
package common
import (
"bytes"
"fmt"
"io/ioutil"
"mime/multipart"
"net/http"
"os"
"time"
"git.cheetah.cat/worksucc/gma-puzzles/gma"
)
type DB_GMA struct {
ID string `json:"_key"`
BatchID string `json:"batch"`
ProcessingStart time.Time `json:"processingStart"`
ProcessingEnd time.Time `json:"processingEnd"`
ProcessingDuration int64 `json:"processingDuration"`
OriginalPath string `json:"originalPath"`
StatModTime time.Time `json:"statModTime"`
GMASize int64 `json:"archiveSize"`
OptimizedSize int64 `json:"gmasmSize"`
GMAHash string `json:"archiveHash"`
FooterAddonCRC uint32 `json:"footerCRC"`
Header gma.GMAHeader `json:"header"`
FirstType int32 `json:"firstType"`
Success bool `json:"success"`
}
type DB_File struct {
ID string `json:"_key"`
BatchID string `json:"batch"`
InitialPath string `json:"initialPath"`
Extension string `json:"extension"`
Size int64 `json:"size"`
CRC uint32 `json:"crc"`
Hash string `json:"hash"`
}
type DB_GMA2File struct {
ID string `json:"_key"`
BatchID string `json:"batch"`
File string `json:"_to"`
GMA string `json:"_from"`
FileNumber int32 `json:"fileNumber"`
FileName string `json:"fileName"`
Offset int64 `json:"offset"`
FileSize int64 `json:"size"`
CRC uint32 `json:"crc"`
CRCMatch bool `json:"crcMatch"`
NextType int32 `json:"nextType"`
LocalFileName string `json:"-"`
UploadID string `json:"-"`
}
type DB_Chunk struct {
ID string `json:"_key"`
Finalized bool `json:"finalized"`
ReadOnly bool `json:"readOnly"`
Size int64 `json:"size"`
Hash string `json:"hash"`
}
type DB_File2Chunk struct {
ID string `json:"_key"`
Chunk string `json:"_to"`
File string `json:"_from"`
}
func MultipartUpload(client *http.Client, url string, path string) (err error) {
//fmt.Printf("\nMultipartUpload(%s, %s)\n", url, path)
file, err := os.Open(path)
if err != nil {
return err
}
fileContents, err := ioutil.ReadAll(file)
if err != nil {
return err
}
fi, err := file.Stat()
if err != nil {
return err
}
file.Close()
body := new(bytes.Buffer)
writer := multipart.NewWriter(body)
part, err := writer.CreateFormFile("file", fi.Name())
if err != nil {
return err
}
part.Write(fileContents)
/*for key, val := range params {
_ = writer.WriteField(key, val)
}*/
err = writer.Close()
if err != nil {
return err
}
req, err := http.NewRequest("POST", url, body)
req.Header.Set("Content-Type", writer.FormDataContentType())
if err != nil {
return err
}
// Submit the request
res, err := client.Do(req)
if err != nil {
return err
}
// Check the response
if res.StatusCode == http.StatusAlreadyReported {
return
}
if res.StatusCode != http.StatusOK {
return fmt.Errorf("bad status: %s", res.Status)
}
return
}

@ -1,36 +1,19 @@
package gma package gma
import (
"bufio"
"bytes"
"crypto/sha256"
"encoding/binary"
"fmt"
"hash/crc32"
"io"
"os"
)
type AddonArchive struct { type AddonArchive struct {
LZMA bool LZMA bool
} }
type GMAReader struct {
FileHandle *os.File
//gmaStream io.Reader
gmaStreamReader *bufio.Reader
cursorOffset uint32
//h header
}
type GMAHeader struct { type GMAHeader struct {
FormatVersion byte FormatVersion byte `json:"formatVersion"`
SteamID uint64 FormatVersionDiscardByte byte `json:"formatVersionDB"`
Timestamp uint64 SteamID uint64 `json:"steamID"`
Timestamp uint64 `json:"timestamp"`
Title string Title string `json:"title"`
Description string Description string `json:"description"`
Author string Author string `json:"author"`
AddonVersion int32 AddonVersion int32 `json:"addonVersion"`
} }
type GMAFileMetadata struct { type GMAFileMetadata struct {
FileNumber int32 FileNumber int32
@ -45,283 +28,3 @@ type GMAExtractionMeta struct {
ExtractedCRC uint32 ExtractedCRC uint32
ExtractedSHA256 string ExtractedSHA256 string
} }
func NewReader(fileName string) (_ GMAReader, err error) {
return GMAReader{}.NewReader(fileName)
}
func (r GMAReader) NewReader(fileName string) (_ GMAReader, err error) {
r.FileHandle, err = os.Open(fileName)
if err != nil {
return r, err
}
r.gmaStreamReader = bufio.NewReader(r.FileHandle)
return r, nil
}
func (r *GMAReader) IsValidGMAD() (isValid bool, err error) {
gmadHeader, err := r.gmaStreamReader.Peek(4)
if err != nil {
return false, err
}
return string(gmadHeader) == "GMAD", nil
}
func (r *GMAReader) IsCompressed() (isValid bool, err error) {
gmadHeader, err := r.gmaStreamReader.Peek(4)
if err != nil {
return false, err
}
return gmadHeader[0] == 93 && gmadHeader[1] == 0 && gmadHeader[1] == gmadHeader[2] && gmadHeader[1] == gmadHeader[3], nil
}
func (r *GMAReader) Close() {
r.FileHandle.Close()
}
func (r *GMAReader) ReadHeader() (GMAHeader, error) {
header := GMAHeader{}
r.gmaStreamReader.Discard(4)
r.cursorOffset += 4
if r.cursorOffset != 4 {
return header, fmt.Errorf("%d invalid offset", r.cursorOffset)
}
// Read the format version
formatVersion, err := r.gmaStreamReader.ReadByte()
if err != nil {
return header, err
}
r.cursorOffset++
// Read the SteamID
steamIDBytes := make([]byte, 8)
_, err = r.gmaStreamReader.Read(steamIDBytes)
if err != nil {
return header, err
}
r.cursorOffset += 8
header.SteamID = binary.LittleEndian.Uint64(steamIDBytes)
// Read the Timestamp
timestampBytes := make([]byte, 8)
_, err = r.gmaStreamReader.Read(timestampBytes)
if err != nil {
return header, err
}
r.cursorOffset += 8
header.Timestamp = binary.LittleEndian.Uint64(timestampBytes)
if formatVersion > 1 {
_, err = r.gmaStreamReader.Discard(1)
if err != nil {
return header, err
}
r.cursorOffset++
}
// Read the Title
header.Title, err = r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return header, err
}
header.Title = header.Title[:len(header.Title)-1] // remove nullbyte
r.cursorOffset += uint32(len(header.Title) + 1) // Add title length + null byte
// Read the Description
header.Description, err = r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return header, err
}
header.Description = header.Description[:len(header.Description)-1] // remove nullbyte
//fmt.Printf("Desc Start %d\n", r.cursorOffset)
r.cursorOffset += uint32(len(header.Description) + 1) // Add description length + null byte
//fmt.Printf("Desc End %d\n", r.cursorOffset)
// Read the Author
header.Author, err = r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return header, err
}
header.Author = header.Author[:len(header.Author)-1] // remove nullbyte
r.cursorOffset += uint32(len(header.Author) + 1) // Add author length + null byte
// Read the AddonVersion
addonVersionBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(addonVersionBytes)
if err != nil {
return header, err
}
r.cursorOffset += 4
header.AddonVersion = int32(binary.LittleEndian.Uint32(addonVersionBytes))
return header, nil
}
func (r *GMAReader) readFileMetadata() (GMAFileMetadata, error) {
metadata := GMAFileMetadata{}
// Read the file name
fileName, err := r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return metadata, err
}
fileName = fileName[:len(fileName)-1] // remove nullbyte
r.cursorOffset += uint32(len(fileName) + 1) // Add name length + null byte
metadata.FileName = fileName
// Read the file size
fileSizeBytes := make([]byte, 8)
_, err = r.gmaStreamReader.Read(fileSizeBytes)
if err != nil {
return metadata, err
}
r.cursorOffset += 8
metadata.FileSize = int64(binary.LittleEndian.Uint64(fileSizeBytes))
// Read the file crc
crcBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(crcBytes)
if err != nil {
return metadata, err
}
r.cursorOffset += 4
metadata.CRC = binary.LittleEndian.Uint32(crcBytes)
// Read the next type
nextTypeBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(nextTypeBytes)
if err != nil {
return metadata, err
}
r.cursorOffset += 4
metadata.NextType = int32(binary.LittleEndian.Uint32(nextTypeBytes))
return metadata, nil
}
func (r *GMAReader) ReadFiles() (files []GMAFileMetadata, err error) {
// read nType 4byte
firstTypeBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(firstTypeBytes)
if err != nil {
return files, err
}
r.cursorOffset += 4
firstType := int32(binary.LittleEndian.Uint32(firstTypeBytes))
if firstType == 0 {
return files, nil
}
fileOffset := int64(0)
fileNumber := int32(1)
for {
fileMeta, err := r.readFileMetadata()
if err != nil {
if err == io.EOF {
break
}
return files, err
}
fileMeta.FileNumber = fileNumber
fileMeta.Offset = fileOffset
//fmt.Printf("%s CRC: %d Offset: %d Size: %d\n", fileMeta.FileName, fileMeta.CRC, fileMeta.Offset, fileMeta.FileSize)
//fmt.Printf("[% x]\n", fileMeta.FileName)
files = append(files, fileMeta)
fileOffset += fileMeta.FileSize
fileNumber++
if fileMeta.NextType == 0 {
break
}
}
return files, nil
}
func (r *GMAReader) GetOffset() (offset uint32) {
return r.cursorOffset
}
func (r *GMAReader) ExtractFileTo(fileMeta GMAFileMetadata, writer io.Writer) (extractMeta GMAExtractionMeta, err error) {
extractMeta.OriginalMeta = fileMeta
// Seek to the specified offset in the reader
limitReader := io.NewSectionReader(r.FileHandle, int64(r.cursorOffset)+fileMeta.Offset, int64(fileMeta.FileSize))
// Copy the specified length of data from the reader to the output file
buf := bytes.NewBuffer(nil)
_, err = io.CopyN(buf, limitReader, int64(fileMeta.FileSize))
if err != nil {
return extractMeta, err
}
shaHasher := sha256.New()
extractMeta.ExtractedCRC = crc32.Checksum(buf.Bytes(), crc32.MakeTable(crc32.IEEE))
shaHasher.Write(buf.Bytes())
extractMeta.ExtractedSHA256 = fmt.Sprintf("%x", shaHasher.Sum(nil))
buf.WriteTo(writer)
return extractMeta, nil
}
/*
func (r GMAReader) ReadHeader() (h GMAHeader, err error) {
gmaHeader := GMAHeader{}
r.readerStream.Discard(4) // skip header
gmaHeader.FormatVersion, err = r.readerStream.ReadByte()
if err != nil {
return gmaHeader, err
}
longBytes := make([]byte, 8)
wordBytes := make([]byte, 4)
// SteamID
bytesRead, err := r.readerStream.Read(longBytes)
if err != nil {
return gmaHeader, err
}
if bytesRead != 8 {
return gmaHeader, fmt.Errorf("steamid missing bytes")
}
gmaHeader.SteamID = binary.LittleEndian.Uint64(longBytes)
// Timestamp
bytesRead, err = r.readerStream.Read(longBytes)
if err != nil {
return gmaHeader, err
}
if bytesRead != 8 {
return gmaHeader, fmt.Errorf("timestamp missing bytes")
}
gmaHeader.Timestamp = binary.LittleEndian.Uint64(longBytes)
if gmaHeader.FormatVersion > 1 {
r.readerStream.Discard(1)
}
// Title
gmaHeader.Title, err = r.readString()
if err != nil {
return gmaHeader, err
}
// Description
gmaHeader.Description, err = r.readString()
if err != nil {
return gmaHeader, err
}
// Author
gmaHeader.Author, err = r.readString()
if err != nil {
return gmaHeader, err
}
// AddonVersion
bytesRead, err = r.readerStream.Read(wordBytes)
if err != nil {
return gmaHeader, err
}
if bytesRead != 4 {
return gmaHeader, fmt.Errorf("AddonVersion missing bytes")
}
gmaHeader.AddonVersion = int32(binary.LittleEndian.Uint32(wordBytes))
return gmaHeader, nil
}
*/

@ -0,0 +1,253 @@
package gma
import (
"bufio"
"bytes"
"crypto/sha256"
"encoding/binary"
"fmt"
"hash/crc32"
"io"
"os"
)
type GMAReader struct {
FileHandle *os.File
//gmaStream io.Reader
gmaStreamReader *bufio.Reader
cursorOffset uint32
//h header
}
func NewReader(fileName string) (_ GMAReader, err error) {
return GMAReader{}.NewReader(fileName)
}
func (r GMAReader) NewReader(fileName string) (_ GMAReader, err error) {
r.FileHandle, err = os.Open(fileName)
if err != nil {
return r, err
}
r.gmaStreamReader = bufio.NewReader(r.FileHandle)
return r, nil
}
func (r *GMAReader) IsValidGMAD() (isValid bool, err error) {
gmadHeader, err := r.gmaStreamReader.Peek(4)
if err != nil {
return false, err
}
return string(gmadHeader) == "GMAD", nil
}
func (r *GMAReader) IsCompressed() (isValid bool, err error) {
gmadHeader, err := r.gmaStreamReader.Peek(4)
if err != nil {
return false, err
}
return gmadHeader[0] == 93 && gmadHeader[1] == 0 && gmadHeader[1] == gmadHeader[2] && gmadHeader[1] == gmadHeader[3], nil
}
func (r *GMAReader) Close() {
r.FileHandle.Close()
}
func (r *GMAReader) ReadHeader() (_ GMAHeader, err error) {
header := GMAHeader{}
r.gmaStreamReader.Discard(4)
r.cursorOffset += 4
if r.cursorOffset != 4 {
return header, fmt.Errorf("%d invalid offset", r.cursorOffset)
}
// Read the format version
header.FormatVersion, err = r.gmaStreamReader.ReadByte()
if err != nil {
return header, err
}
r.cursorOffset++
// Read the SteamID
steamIDBytes := make([]byte, 8)
_, err = r.gmaStreamReader.Read(steamIDBytes)
if err != nil {
return header, err
}
r.cursorOffset += 8
header.SteamID = binary.LittleEndian.Uint64(steamIDBytes)
// Read the Timestamp
timestampBytes := make([]byte, 8)
_, err = r.gmaStreamReader.Read(timestampBytes)
if err != nil {
return header, err
}
r.cursorOffset += 8
header.Timestamp = binary.LittleEndian.Uint64(timestampBytes)
if header.FormatVersion > 1 {
header.FormatVersionDiscardByte, err = r.gmaStreamReader.ReadByte()
if err != nil {
return header, err
}
r.cursorOffset++
}
// Read the Title
header.Title, err = r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return header, err
}
header.Title = header.Title[:len(header.Title)-1] // remove nullbyte
r.cursorOffset += uint32(len(header.Title) + 1) // Add title length + null byte
// Read the Description
header.Description, err = r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return header, err
}
header.Description = header.Description[:len(header.Description)-1] // remove nullbyte
//fmt.Printf("Desc Start %d\n", r.cursorOffset)
r.cursorOffset += uint32(len(header.Description) + 1) // Add description length + null byte
//fmt.Printf("Desc End %d\n", r.cursorOffset)
// Read the Author
header.Author, err = r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return header, err
}
header.Author = header.Author[:len(header.Author)-1] // remove nullbyte
r.cursorOffset += uint32(len(header.Author) + 1) // Add author length + null byte
// Read the AddonVersion
addonVersionBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(addonVersionBytes)
if err != nil {
return header, err
}
r.cursorOffset += 4
header.AddonVersion = int32(binary.LittleEndian.Uint32(addonVersionBytes))
return header, nil
}
func (r *GMAReader) readFileMetadata() (GMAFileMetadata, error) {
metadata := GMAFileMetadata{}
// Read the file name
fileName, err := r.gmaStreamReader.ReadString(byte(0))
if err != nil {
return metadata, err
}
fileName = fileName[:len(fileName)-1] // remove nullbyte
r.cursorOffset += uint32(len(fileName) + 1) // Add name length + null byte
metadata.FileName = fileName
// Read the file size
fileSizeBytes := make([]byte, 8)
_, err = r.gmaStreamReader.Read(fileSizeBytes)
if err != nil {
return metadata, err
}
r.cursorOffset += 8
metadata.FileSize = int64(binary.LittleEndian.Uint64(fileSizeBytes))
// Read the file crc
crcBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(crcBytes)
if err != nil {
return metadata, err
}
r.cursorOffset += 4
metadata.CRC = binary.LittleEndian.Uint32(crcBytes)
// Read the next type
nextTypeBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(nextTypeBytes)
if err != nil {
return metadata, err
}
r.cursorOffset += 4
metadata.NextType = int32(binary.LittleEndian.Uint32(nextTypeBytes))
return metadata, nil
}
func (r *GMAReader) ReadAddonCRC(lastOffset int64) (crc uint32, err error) {
limitReader := io.NewSectionReader(r.FileHandle, int64(r.cursorOffset)+lastOffset, int64(4))
crcBytes := make([]byte, 4)
_, err = limitReader.Read(crcBytes)
if err != nil {
return 0, err
}
r.cursorOffset += 4
CRC := binary.LittleEndian.Uint32(crcBytes)
return CRC, nil
}
func (r *GMAReader) ReadFiles() (firstType int32, files []GMAFileMetadata, err error) {
// read nType 4byte
firstTypeBytes := make([]byte, 4)
_, err = r.gmaStreamReader.Read(firstTypeBytes)
if err != nil {
return 0, files, err
}
r.cursorOffset += 4
firstType = int32(binary.LittleEndian.Uint32(firstTypeBytes))
if firstType == 0 {
return 0, files, nil
}
fileOffset := int64(0)
fileNumber := int32(1)
for {
fileMeta, err := r.readFileMetadata()
if err != nil {
if err == io.EOF {
break
}
return firstType, files, err
}
fileMeta.FileNumber = fileNumber
fileMeta.Offset = fileOffset
//fmt.Printf("%s CRC: %d Offset: %d Size: %d\n", fileMeta.FileName, fileMeta.CRC, fileMeta.Offset, fileMeta.FileSize)
//fmt.Printf("[% x]\n", fileMeta.FileName)
files = append(files, fileMeta)
fileOffset += fileMeta.FileSize
fileNumber++
if fileMeta.NextType == 0 {
break
}
}
return firstType, files, nil
}
func (r *GMAReader) GetOffset() (offset uint32) {
return r.cursorOffset
}
func (r *GMAReader) ExtractFileTo(fileMeta GMAFileMetadata, writer io.Writer) (extractMeta GMAExtractionMeta, err error) {
extractMeta.OriginalMeta = fileMeta
// Seek to the specified offset in the reader
limitReader := io.NewSectionReader(r.FileHandle, int64(r.cursorOffset)+fileMeta.Offset, int64(fileMeta.FileSize))
// Copy the specified length of data from the reader to the output file
buf := bytes.NewBuffer(nil)
_, err = io.CopyN(buf, limitReader, int64(fileMeta.FileSize))
if err != nil {
return extractMeta, err
}
shaHasher := sha256.New()
extractMeta.ExtractedCRC = crc32.Checksum(buf.Bytes(), crc32.MakeTable(crc32.IEEE))
shaHasher.Write(buf.Bytes())
extractMeta.ExtractedSHA256 = fmt.Sprintf("%x", shaHasher.Sum(nil))
buf.WriteTo(writer)
return extractMeta, nil
}
func (r *GMAReader) GetSHA256() (hash string, err error) {
shaHasher := sha256.New()
if _, err := io.Copy(shaHasher, r.FileHandle); err != nil {
return "", err
}
return fmt.Sprintf("%x", shaHasher.Sum(nil)), nil
}

@ -0,0 +1,132 @@
package gma
import (
"bufio"
"crypto/sha256"
"encoding/binary"
"fmt"
"io"
"os"
)
type GMAWriter struct {
FileHandle *os.File
gmaStreamWriter *bufio.Writer
}
func NewWriter(fileName string) (_ GMAWriter, err error) {
return GMAWriter{}.NewWriter(fileName)
}
func (w GMAWriter) NewWriter(fileName string) (_ GMAWriter, err error) {
w.FileHandle, err = os.Create(fileName)
if err != nil {
return w, err
}
w.gmaStreamWriter = bufio.NewWriter(w.FileHandle)
return w, nil
}
func (w *GMAWriter) WriteHeader(header GMAHeader) (err error) {
w.gmaStreamWriter.WriteByte('G')
w.gmaStreamWriter.WriteByte('M')
w.gmaStreamWriter.WriteByte('A')
w.gmaStreamWriter.WriteByte('D')
w.gmaStreamWriter.WriteByte(header.FormatVersion)
steamIDBytes := make([]byte, 8)
binary.LittleEndian.PutUint64(steamIDBytes, header.SteamID)
w.gmaStreamWriter.Write(steamIDBytes)
timestampBytes := make([]byte, 8)
binary.LittleEndian.PutUint64(timestampBytes, header.Timestamp)
w.gmaStreamWriter.Write(timestampBytes)
if header.FormatVersion > 1 {
w.gmaStreamWriter.WriteByte(header.FormatVersionDiscardByte)
}
w.gmaStreamWriter.WriteString(header.Title)
w.gmaStreamWriter.WriteByte(0)
w.gmaStreamWriter.WriteString(header.Description)
w.gmaStreamWriter.WriteByte(0)
w.gmaStreamWriter.WriteString(header.Author)
w.gmaStreamWriter.WriteByte(0)
addonVersionBytes := make([]byte, 4)
binary.LittleEndian.PutUint32(addonVersionBytes, uint32(header.AddonVersion))
w.gmaStreamWriter.Write(addonVersionBytes)
w.gmaStreamWriter.Flush()
return nil
}
func (w *GMAWriter) Close() (err error) {
return w.FileHandle.Close()
}
func (w *GMAWriter) WriteFooterCRC(footerCRC uint32) (err error) {
crcBytes := make([]byte, 4)
binary.LittleEndian.PutUint32(crcBytes, footerCRC)
w.gmaStreamWriter.Write(crcBytes)
w.gmaStreamWriter.Flush()
return nil
}
func (w *GMAWriter) WriteFirstType(firstType int32) (err error) {
firstTypeBytes := make([]byte, 4)
binary.LittleEndian.PutUint32(firstTypeBytes, uint32(firstType))
w.gmaStreamWriter.Write(firstTypeBytes)
w.gmaStreamWriter.Flush()
return nil
}
func (w *GMAWriter) WriteFileIndex(fileName string, fileSize int64, fileCRC uint32, nextType int32) (err error) {
w.gmaStreamWriter.WriteString(fileName)
w.gmaStreamWriter.WriteByte(0)
fileSizeBytes := make([]byte, 8)
binary.LittleEndian.PutUint64(fileSizeBytes, uint64(fileSize))
w.gmaStreamWriter.Write(fileSizeBytes)
crcBytes := make([]byte, 4)
binary.LittleEndian.PutUint32(crcBytes, fileCRC)
w.gmaStreamWriter.Write(crcBytes)
nextTypeBytes := make([]byte, 4)
binary.LittleEndian.PutUint32(nextTypeBytes, uint32(nextType))
w.gmaStreamWriter.Write(nextTypeBytes)
w.gmaStreamWriter.Flush()
return nil
}
func (w *GMAWriter) WriteFile(reader io.ReadCloser) (err error) {
//body := new(bytes.Buffer)
if _, err = io.Copy(w.gmaStreamWriter, reader); err != nil {
return err
}
/*
byteCount, err := w.gmaStreamWriter.Write(body.Bytes())
if err != nil {
return err
}
if byteCount != body.Len() {
return fmt.Errorf("Only wrote %d bytes from %d", byteCount, body.Len())
}
*/
err = w.gmaStreamWriter.Flush()
if err != nil {
return err
}
return nil
}
func (w GMAWriter) GetSHA256() (hash string, err error) {
shaHasher := sha256.New()
if _, err := io.Copy(shaHasher, w.FileHandle); err != nil {
return "", err
}
return fmt.Sprintf("%x", shaHasher.Sum(nil)), nil
}
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