WriteTempFile writes to a new temporary file. The file is deleted if there was an error while writing.
( ctx context.Context, reqReader io.Reader, absBasePath config.Path, )
| 108 | // WriteTempFile writes to a new temporary file. |
| 109 | // The file is deleted if there was an error while writing. |
| 110 | func WriteTempFile( |
| 111 | ctx context.Context, reqReader io.Reader, absBasePath config.Path, |
| 112 | ) (hash types.Base64Hash, size types.FileSizeBytes, path types.Path, err error) { |
| 113 | size = -1 |
| 114 | logger := util.GetLogger(ctx) |
| 115 | tmpFileWriter, tmpFile, tmpDir, err := createTempFileWriter(absBasePath) |
| 116 | if err != nil { |
| 117 | return |
| 118 | } |
| 119 | defer func() { |
| 120 | err2 := tmpFile.Close() |
| 121 | if err == nil { |
| 122 | err = err2 |
| 123 | } |
| 124 | }() |
| 125 | |
| 126 | // Hash the file data. The hash will be returned. The hash is useful as a |
| 127 | // method of deduplicating files to save storage, as well as a way to conduct |
| 128 | // integrity checks on the file data in the repository. |
| 129 | hasher := sha256.New() |
| 130 | teeReader := io.TeeReader(reqReader, hasher) |
| 131 | bytesWritten, err := io.Copy(tmpFileWriter, teeReader) |
| 132 | if err != nil && err != io.EOF { |
| 133 | RemoveDir(tmpDir, logger) |
| 134 | return |
| 135 | } |
| 136 | |
| 137 | err = tmpFileWriter.Flush() |
| 138 | if err != nil { |
| 139 | RemoveDir(tmpDir, logger) |
| 140 | return |
| 141 | } |
| 142 | |
| 143 | hash = types.Base64Hash(base64.RawURLEncoding.EncodeToString(hasher.Sum(nil)[:])) |
| 144 | size = types.FileSizeBytes(bytesWritten) |
| 145 | path = tmpDir |
| 146 | return |
| 147 | } |
| 148 | |
| 149 | // moveFile attempts to move the file src to dst |
| 150 | func moveFile(src types.Path, dst types.Path) error { |
nothing calls this directly
no test coverage detected