harmony 鸿蒙文件管理子系统ChangeLog

2022-12-22
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文件管理子系统ChangeLog

cl.filemanagement.1 fileio相关接口异常处理方式变更

file_api部件fileio接口返回值不包含错误码error.code，现进行错误码整改，废弃原有相关接口，新增相关接口。

变更影响

基于此前版本开发的应用，需注意废弃接口的迭代更新。新接口在接口规格上进行了微调，需注意新接口使用方法。

关键接口/组件变更

为适配统一的API异常处理方式，对fileio相关接口进行废弃，并新增对应接口，原接口位于@ohos.fileio，新接口位于@ohos.file.fs。新增接口支持统一的错误码异常处理规范，功能上与原接口保持一致，参数上有微调。

模块名	方法/属性/枚举/常量	变更类型
@ohos.fileio	function open(path: string, flags?: number, mode?: number, callback?: AsyncCallback): void \|Promise;	废弃
@ohos.fileio	function openSync(path: string, flags?: number, mode?: number): number;	废弃
@ohos.file.fs	function open(path: string, mode?: number, callback?: AsyncCallback): void \|Promise;	新增
@ohos.file.fs	function openSync(path: string, mode?: number): File;	新增
@ohos.fileio	function read(fd: number, buffer: ArrayBuffer, options?: { offset?: number; length?: number; position?: number; }, callback?: AsyncCallback): void \|Promise;	废弃
@ohos.fileio	function readSync(fd: number, buffer: ArrayBuffer, options?: { offset?: number; length?: number; position?: number; }): number;	废弃
@ohos.file.fs	function read(fd: number, buffer: ArrayBuffer, options?: { offset?: number; length?: number; }, callback?: AsyncCallback): void \|Promise;	新增
@ohos.file.fs	function readSync(fd: number, buffer: ArrayBuffer, options?: { offset?: number; length?: number; }): number;	新增
@ohos.fileio	function stat(path: string, callback?: AsyncCallback): void \|Promise;	废弃
@ohos.fileio	function statSync(path: string): Stat;	废弃
@ohos.fileio	function fstat(fd: number, callback?: AsyncCallback): void \|Promise;	废弃
@ohos.fileio	function fstatSync(fd: number): Stat;	废弃
@ohos.file.fs	function stat(file: string \|number, callback?: AsyncCallback): void \|Promise;	新增
@ohos.file.fs	function statSync(file: string \|number): Stat;	新增
@ohos.fileio	function truncate(path: string, len?: number, callback?: AsyncCallback): void \|Promise;	废弃
@ohos.fileio	function truncateSync(path: string, len?: number): void;	废弃
@ohos.fileio	function ftruncate(fd: number, len?: number, callback?: AsyncCallback): void \|Promise;	废弃
@ohos.fileio	function ftruncateSync(fd: number, len?: number): void;	废弃
@ohos.file.fs	function truncate(file: string \|number, len?: number, callback?: AsyncCallback): void \|Promise;	新增
@ohos.file.fs	function truncateSync(file: string \|number, len?: number): void;	新增
@ohos.fileio	function write(fd: number, buffer: ArrayBuffer \|string, options?: { offset?: number; length?: number; position?: number; encoding?: string; }, callback?: AsyncCallback): void \|Promise;	废弃
@ohos.fileio	function writeSync(fd: number, buffer: ArrayBuffer \|string, options?: { offset?: number; length?: number; position?: number; encoding?: string; }): number;	废弃
@ohos.file.fs	function write(fd: number, buffer: ArrayBuffer \|string, options?: { offset?: number; length?: number; encoding?: string; }, callback?: AsyncCallback): void \|Promise;	新增
@ohos.file.fs	function writeSync(fd: number, buffer: ArrayBuffer \|string, options?: { offset?: number; length?: number; encoding?: string; }): number;	新增

适配指导

原接口使用的是@ohos.fileio，以以下方式import:

import fileio from '@ohos.fileio';

现新接口使用的是@ohos.file.fs，以以下方式import:

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

此外还需要适配异常处理，同步接口异常处理示例代码:

import fs from '@ohos.file.fs'

try {
    let file = fs.openSync(path, fs.OpenMode.READ_ONLY);
} catch (err) {
    console.error("openSync errCode:" + err.code + ", errMessage:" + err.message);
}

异步接口promise方法异常处理示例代码:

import fs from '@ohos.file.fs'

try {
    let file = await fs.open(path, fs.OpenMode.READ_ONLY);
} catch (err) {
    console.error("open promise errCode:" + err.code + ", errMessage:" + err.message);
}

异步接口callback方法异常处理示例代码:

import fs from '@ohos.file.fs'

try {
    fs.open(path, fs.OpenMode.READ_ONLY, function(e, file){ //异步线程的错误（如系统调用等）在回调中获取
        if (e) {
            console.error("open in async errCode:" + e.code + ", errMessage:" + e.message);
        }
    });
} catch (err) { //主线程的错误（如非法参数等）通过try catch获取
    console.error("open callback errCode:" + err.code + ", errMessage:" + err.message);
}