harmony 鸿蒙@ohos.file.securityLabel (数据标签)

2023-02-03 浏览 (773)

@ohos.file.securityLabel (数据标签)

该模块提供文件数据安全等级的相关功能:向应用程序提供查询、设置文件数据安全等级的JS接口。

说明:

本模块首批接口从API version 9开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。

导入模块

import securityLabel from '@ohos.file.securityLabel';

使用说明

使用该功能模块对文件/目录进行操作前,需要先获取其应用沙箱路径,获取方式及其接口用法请参考:

Stage模型

import UIAbility from '@ohos.app.ability.UIAbility';
import window from '@ohos.window';

export default class EntryAbility extends UIAbility {
  onWindowStageCreate(windowStage: window.WindowStage) {
    let context = this.context;
    let pathDir = context.filesDir;
  }
}

FA模型

import featureAbility from '@ohos.ability.featureAbility';

let context = featureAbility.getContext();
context.getFilesDir().then((data) => {
  let pathDir = data;
})

FA模型context的具体获取方法参见FA模型

securityLabel.setSecurityLabel

setSecurityLabel(path:string, type:DataLevel):Promise<void>

以异步方法设置数据标签,以promise形式返回结果。

系统能力:SystemCapability.FileManagement.File.FileIO

参数:

参数名类型必填说明
pathstring文件路径
typeDataLevel文件等级属性,只支持"s0","s1","s2","s3","s4"

返回值:

类型说明
Promise<void>Promise实例,用于异步获取结果。本调用将返回空值。

错误码:

以下错误码的详细介绍请参见基础文件IO错误码

错误码ID错误信息
13900001Operation not permitted
13900007Arg list too long
13900015File exists
13900020Invalid argument
13900025No space left on device
13900037No data available
13900041Quota exceeded
13900042Unknown error

示例:

import { BusinessError } from '@ohos.base';
let filePath = pathDir + '/test.txt';
securityLabel.setSecurityLabel(filePath, "s0").then(() => {
  console.info("setSecurityLabel successfully");
}).catch((err: BusinessError) => {
  console.info("setSecurityLabel failed with error message: " + err.message + ", error code: " + err.code);
});

securityLabel.setSecurityLabel

setSecurityLabel(path:string, type:DataLevel, callback: AsyncCallback<void>):void

以异步方法设置数据标签,以callback形式返回结果。

系统能力:SystemCapability.FileManagement.File.FileIO

参数:

参数名类型必填说明
pathstring文件路径
typeDataLevel文件等级属性,只支持"s0","s1","s2","s3","s4"
callbackAsyncCallback<void>是否设置数据标签之后的回调

错误码:

以下错误码的详细介绍请参见基础文件IO错误码

错误码ID错误信息
13900001Operation not permitted
13900007Arg list too long
13900015File exists
13900020Invalid argument
13900025No space left on device
13900037No data available
13900041Quota exceeded
13900042Unknown error

示例:

import { BusinessError } from '@ohos.base';
let filePath = pathDir + '/test.txt';
securityLabel.setSecurityLabel(filePath, "s0", (err: BusinessError) => {
  if (err) {
    console.info("setSecurityLabel failed with error message: " + err.message + ", error code: " + err.code);
  } else {
    console.info("setSecurityLabel successfully.");
  }
});

securityLabel.setSecurityLabelSync

setSecurityLabelSync(path:string, type:DataLevel):void

以同步方法设置数据标签。

系统能力:SystemCapability.FileManagement.File.FileIO

参数:

参数名类型必填说明
pathstring文件路径
typeDataLevel文件等级属性,只支持"s0","s1","s2","s3","s4"

错误码:

以下错误码的详细介绍请参见基础文件IO错误码

错误码ID错误信息
13900001Operation not permitted
13900007Arg list too long
13900015File exists
13900020Invalid argument
13900025No space left on device
13900037No data available
13900041Quota exceeded
13900042Unknown error

示例:

let filePath = pathDir + '/test.txt';
securityLabel.setSecurityLabelSync(filePath, "s0");

securityLabel.getSecurityLabel

getSecurityLabel(path:string):Promise<string>

异步方法获取数据标签,以promise形式返回结果。

系统能力:SystemCapability.FileManagement.File.FileIO

参数:

参数名类型必填说明
pathstring文件路径

返回值:

类型说明
Promise<string>返回数据标签

错误码:

以下错误码的详细介绍请参见基础文件IO错误码

错误码ID错误信息
13900001Operation not permitted
13900007Arg list too long
13900015File exists
13900020Invalid argument
13900025No space left on device
13900037No data available
13900041Quota exceeded
13900042Unknown error

示例:

import { BusinessError } from '@ohos.base';
let filePath = pathDir + '/test.txt';
securityLabel.getSecurityLabel(filePath).then((type: string) => {
  console.log("getSecurityLabel successfully, Label: " + type);
}).catch((err: BusinessError) => {
  console.log("getSecurityLabel failed with error message: " + err.message + ", error code: " + err.code);
});

securityLabel.getSecurityLabel

getSecurityLabel(path:string, callback:AsyncCallback<string>): void

异步方法获取数据标签,以callback形式返回结果。

系统能力:SystemCapability.FileManagement.File.FileIO

参数:

参数名类型必填说明
pathstring文件路径
callbackAsyncCallback<string>异步获取数据标签之后的回调

错误码:

以下错误码的详细介绍请参见基础文件IO错误码

错误码ID错误信息
13900001Operation not permitted
13900007Arg list too long
13900015File exists
13900020Invalid argument
13900025No space left on device
13900037No data available
13900041Quota exceeded
13900042Unknown error

示例:

import { BusinessError } from '@ohos.base';
let filePath = pathDir + '/test.txt';
securityLabel.getSecurityLabel(filePath, (err: BusinessError, type: string) => {
  if (err) {
    console.log("getSecurityLabel failed with error message: " + err.message + ", error code: " + err.code);
  } else {
    console.log("getSecurityLabel successfully, Label: " + type);
  }
});

securityLabel.getSecurityLabelSync

getSecurityLabelSync(path:string):string

以同步方法获取数据标签。

系统能力:SystemCapability.FileManagement.File.FileIO

参数:

参数名类型必填说明
pathstring文件路径

返回值:

类型说明
string返回数据标签

错误码:

以下错误码的详细介绍请参见基础文件IO错误码

错误码ID错误信息
13900001Operation not permitted
13900007Arg list too long
13900015File exists
13900020Invalid argument
13900025No space left on device
13900037No data available
13900041Quota exceeded
13900042Unknown error

示例:

let filePath = pathDir + '/test.txt';
let type = securityLabel.getSecurityLabelSync(filePath);
console.log("getSecurityLabel successfully, Label: " + type);

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