HarmonyOS hash.hash()无法对从DocumentViewPicker获取的文件进行计算

代码如下：

let documentSelectOptions = new picker.DocumentSelectOptions();
let documentPicker = new picker.DocumentViewPicker();
documentPicker.select(documentSelectOptions).then((documentSelectResult: Array<string>) => {
  let filePath = documentSelectResult[0];

  hash.hash(filePath, "sha256").then((str: string) => {
    Logger.info("calculate file hash succeed:", str);
  }).catch((err: BusinessError) => {
    Logger.error("calculate file hash failed with error"," message: " + err.message + ", error code: " + err.code);
  });


}).catch((err: BusinessError) => {
  console.error('DocumentViewPicker.select failed with err: ' + JSON.stringify(err));
});

HarmonyOS

shlp

2024-12-25 15:57:30

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回答 1

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回答 1

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put_get

hash.hash() 仅支持沙箱路径，若使用系统公共目录文件，需将文件拷贝至沙箱目录下，沙箱路径：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/app-sandbox-directory-V5

hash参考文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-file-hash-V5

请参考代码：

let documentSelectOptions = new picker.DocumentSelectOptions();
let documentPicker = new picker.DocumentViewPicker();
documentPicker.select(documentSelectOptions).then((documentSelectResult: Array<string>) => {
  let file1 = fs.openSync(documentSelectResult[0])
  fs.copyFileSync(file1.fd, `data/storage/el2/base/files/${file1.name}`)
  let file2 = fs.openSync(`data/storage/el2/base/files/${file1.name}`, fs.OpenMode.READ_WRITE)
  console.log(`file fd ==> ${file2.fd} | file path ==> ${file2.path}`)
  hash.hash(file2.path, "sha256").then((str: string) => {
    console.info("calculate file hash succeed:", str);
  }).catch((err: BusinessError) => {
    console.error("calculate file hash failed with error"," message: " + err.message + ", error code: " + err.code);
  });
}).catch((err: BusinessError) => {
  console.error('DocumentViewPicker.select failed with err: ' + JSON.stringify(err));
});