HarmonyOS 鸿蒙Next 域名证书如何获取沙箱路径

需要将Charles的代理文件【pem文件】放到rawfile中 注意： rawfile下的不能直接读取到，拷贝到getContext().filesDir下。这个是OH接口目前的要求。将三方库代码下载，在index.ets中加一个拷贝证书代码，然后再发送请求中带上证书与代理

getUrl: string = 'https://1.94.37.200:8080/user/getUserByUuid?userUuid=1'

caPath:string = ""

async aboutToAppear(){
    this.caPath = getContext().filesDir + "/Pem.pem"
    let ca: Uint8Array = await getContext().resourceManager.getRawFileContent("Pem.pem");
    if (ca != null) {
        let file = fs.openSync(this.caPath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
        fs.writeSync(file.fd, ca.buffer);
        fs.fsyncSync(file.fd);
        fs.closeSync(file);
        console.info("madixin: copycopycopycopycopy");
    } else {
        console.info("madixin: ooooooooo");
    }
}

// get请求
get() {
    this.clear()
    axios.get<string, AxiosResponse<string>, null>(this.getUrl,{
        proxy:{
            host: '192.168.43.168',
            port: 8888,
            exclusionList:[]
        },
        caPath: this.caPath, //ca证书路径
    }).then((res: AxiosResponse) => {
        this.status = res ? res.status : '';
        this.message = res ? JSON.stringify(res.data) : '';
    }).catch((err: AxiosError) => {
        this.status = ''
        this.message = err.message;
    })
}