HyperNet/Paperclip
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🐛 Fix bug crash caused by hash small files

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This commit is contained in:
LittleSheep
2024-10-18 23:36:54 +08:00
parent cbe034a049
commit a9156992f4
2 changed files with 35 additions and 26 deletions
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55
pkg/internal/services/analyzer.go
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@@ -277,32 +277,41 @@ func HashAttachment(file models.Attachment) (hash string, err error) {
hasher := sha256.New()
// Hash the first 32KB
buf := make([]byte, chunkSize)
if _, err := inFile.Read(buf); err != nil && err != io.EOF {
return "", fmt.Errorf("error reading file: %v", err)
}
hasher.Write(buf)
if chunkSize*3 <= fileInfo.Size() {
// If the total size is smaller than three chunks, then hash the whole file
buf := make([]byte, fileInfo.Size())
if _, err := inFile.Read(buf); err != nil && err != io.EOF {
return "", fmt.Errorf("error reading whole file: %v", err)
}
hasher.Write(buf)
} else {
// Hash the first 32KB
buf := make([]byte, chunkSize)
if _, err := inFile.Read(buf); err != nil && err != io.EOF {
return "", fmt.Errorf("error reading file: %v", err)
}
hasher.Write(buf)
// Hash the middle 32KB
middleOffset := fileInfo.Size() / 2
if _, err := inFile.Seek(middleOffset, io.SeekStart); err != nil {
return "", fmt.Errorf("error seeking to middle: %v", err)
}
if _, err := inFile.Read(buf); err != nil && err != io.EOF {
return "", fmt.Errorf("error reading middle: %v", err)
}
hasher.Write(buf)
// Hash the middle 32KB
middleOffset := fileInfo.Size() / 2
if _, err := inFile.Seek(middleOffset, io.SeekStart); err != nil {
return "", fmt.Errorf("error seeking to middle: %v", err)
}
if _, err := inFile.Read(buf); err != nil && err != io.EOF {
return "", fmt.Errorf("error reading middle: %v", err)
}
hasher.Write(buf)
// Hash the last 32KB
endOffset := fileInfo.Size() - chunkSize
if _, err := inFile.Seek(endOffset, io.SeekStart); err != nil {
return "", fmt.Errorf("error seeking to end: %v", err)
// Hash the last 32KB
endOffset := fileInfo.Size() - chunkSize
if _, err := inFile.Seek(endOffset, io.SeekStart); err != nil {
return "", fmt.Errorf("error seeking to end: %v", err)
}
if _, err := inFile.Read(buf); err != nil && err != io.EOF {
return "", fmt.Errorf("error reading end: %v", err)
}
hasher.Write(buf)
}
if _, err := inFile.Read(buf); err != nil && err != io.EOF {
return "", fmt.Errorf("error reading end: %v", err)
}
hasher.Write(buf)
// Hash with the file metadata
hasher.Write([]byte(fmt.Sprintf("%d", file.Size)))