对象存储BOS

    数据处理及使用

    生命周期管理

    BOS支持用户对Bucket设置生命周期规则,以自动将过期的文件清除,节省存储空间。针对不同前缀的文件,用户可以同时设置多条规则。 详细信息请参考生命周期管理

    设置生命周期规则

    可以通过如下两种方式设置生命周期规则:

    // 1、以Json格式的字符串
    String jsonBucketLifecylce = "{\"rule\":[{\"id\":\"yourBucketName/*-DeleteObject\""+",\"status\":\"enabled\""+",\"resource\":[\"yourBucketName/*\"]"+",\"condition\":{\"time\":{\"dateGreaterThan\":\"2018-09-07T00:00:00Z\"}}"+",\"action\":{\"name\":\"DeleteObject\"}}]}";
    
    SetBucketLifecycleRequest request = new SetBucketLifecycleRequest("yourBucketName",jsonBucketLifecylce);
    client.setBucketBucketLifecycle(request);
    // 2、用户只需指定指定参数即可
    List<Rule> rules = new ArrayList<Rule>();
    List<String> resource = new ArrayList<String>();
    Action action = new Action();
    Condition condition = new Condition();
    
    resource.add("yourBucketName/*");
    action.setName("DeleteObject");
    
    Time time = new Time();
    time.setDateGreaterThan("2018-09-07T00:00:00Z");
    condition.setTime(time);
    
    Rule rule = new Rule();
    rule.setId("yourBucketName/*-DeleteObject");
    rule.setStatus("enabled");
    rule.setResource(resource);
    rule.setCondition(condition);
    rule.setAction(action);
    
    List<String> resource1 = new ArrayList<String>();
    Action action1 = new Action();
    Condition condition1 = new Condition();
    
    resource1.add("yourBucketName/*");
    action1.setName("Transition");
    action1.setStorageClass("STANDARD_IA");
    
    Time time1 = new Time();
    time1.setDateGreaterThan("2018-09-08T00:00:00Z");
    condition1.setTime(time1);
    
    Rule rule1 = new Rule();
    rule1.setId("yourBucketName/*-Transition");
    rule1.setStatus("enabled");
    rule1.setResource(resource1);
    rule1.setCondition(condition1);
    rule1.setAction(action1);
    
    rules.add(rule1);
    rules.add(rule);
    
    SetBucketLifecycleRequest request = new SetBucketLifecycleRequest();
    request.withBucketName("yourBucketName");
    request.setRuleList(rules);
    client.setBucketBucketLifecycle(request);

    查看生命周期规则

    可通过如下代码查看Bucket内的生命周期规则:

    GetBucketLifecycleRequest request = new GetBucketLifecycleRequest("yourBucketName");
    GetBucketLifecycleResponse response = client.getBucketLifecycle(request);

    删除生命周期规则

    可通过如下代码清空生命周期规则:

    DeleteBucketLifecycleRequest request = new DeleteBucketLifecycleRequest("yourBucketName");
    client.deleteBucketLifecycle(request);

    跨域资源共享

    跨域资源共享(Cross-Origin Resource Sharing),简称CORS,是HTML5提供的标准跨域解决方案,BOS目前已经支持CORS标准来实现跨域访问。关于跨域访问的介绍请参考跨域访问

    设定CORS规则

    可以通过如下两种方式设置跨域规则:

    // 1、以Json格式的字符串
    String jsonBucketCors = "{\"corsConfiguration\": [{\"allowedOrigins\":[\"http://*\""+",\"https://*\"]"+",\"allowedMethods\":[\"GET\""+",\"HEAD\""+",\"POST\""+",\"PUT\"]"+",\"allowedHeaders\":[\"*\"]"+",\"allowedExposeHeaders\":[\"ETag\""+",\"Content-Length\""+",\"x-bce-next-append-offset\""+",\"x-bce-object-type\""+",\"x-bce-request-id\"]"+",\"maxAgeSeconds\":1800}]}";
    
    SetBucketCorsRequest request = new SetBucketCorsRequest();
    request.setJsonBucketCors(jsonBucketCors);
    request.withBucketName("yourBucketName");
    client.setBucketBucketCors(request);
    // 2、用户只需指定指定参数即可
    SetBucketCorsRequest request = new SetBucketCorsRequest();
    request.setBucketName("yourBucketName");
    List<CorsConfiguration>  corsConfigurations = new ArrayList<CorsConfiguration>();
    List<String> allowedOrigins = new ArrayList<String>();
    List<AllowedMethods> allowedMethods = new ArrayList<AllowedMethods>();
    List<String> allowedHeaders = new ArrayList<String>();
    List<String> allowedExposeHeaders = new ArrayList<String>();
    
    CorsConfiguration corsConfiguration = new CorsConfiguration();
    CorsConfiguration corsConfiguration1 = new CorsConfiguration();
    // AllowedOrigins
    allowedOrigins.add("http://www.example.com");
    allowedOrigins.add("http://www.example1.com");
    
    allowedMethods.add(AllowedMethods.GET);
    allowedMethods.add(AllowedMethods.POST);
    allowedMethods.add(AllowedMethods.PUT);
    allowedMethods.add(AllowedMethods.DELETE);
    
    // allowedHeaders
    allowedHeaders.add("head1");
    allowedHeaders.add("head2");
    
    // allowedExposeHeaders
    allowedExposeHeaders.add("ETag");
    allowedExposeHeaders.add("Content-Length");
    allowedExposeHeaders.add("x-bce-next-append-offset");
    allowedExposeHeaders.add("x-bce-object-type");
    
    corsConfiguration.setAllowedOrigins(allowedOrigins);
    corsConfiguration.setAllowedMethods(allowedMethods);
    corsConfiguration.setAllowedHeaders(allowedHeaders);
    corsConfiguration.setAllowedExposeHeaders(allowedExposeHeaders);
    corsConfiguration.setMaxAgeSeconds(1800);
    
    List<String> allowedOrigins1 = new ArrayList<String>();
    List<AllowedMethods> allowedMethods1 = new ArrayList<AllowedMethods>();
    List<String> allowedHeaders1 = new ArrayList<String>();
    List<String> allowedExposeHeaders1 = new ArrayList<String>();
    
    corsConfigurations.add(corsConfiguration);
    
    // AllowedOrigins
    allowedOrigins1.add("allowedOrigin1");
    allowedOrigins1.add("allowedOrigin2");
    
    // allowedMethods
    allowedMethods1.add(AllowedMethods.GET);
    allowedMethods1.add(AllowedMethods.POST);
    allowedMethods1.add(AllowedMethods.PUT);
    allowedMethods1.add(AllowedMethods.DELETE);
    
    // allowedHeaders
    allowedHeaders1.add("head3");
    allowedHeaders1.add("head4");
    
    // allowedExposeHeaders
    allowedExposeHeaders1.add("ETag");
    allowedExposeHeaders1.add("Content-Length");
    allowedExposeHeaders1.add("x-bce-next-append-offset");
    allowedExposeHeaders1.add("x-bce-object-type");
    
    
    corsConfiguration1.setAllowedOrigins(allowedOrigins1);
    corsConfiguration1.setAllowedMethods(allowedMethods1);
    corsConfiguration1.setAllowedHeaders(allowedHeaders1);
    corsConfiguration1.setAllowedExposeHeaders(allowedExposeHeaders1);
    corsConfiguration1.setMaxAgeSeconds(3600);
    
    corsConfigurations.add(corsConfiguration1);
    
    request.setCorsConfigurationsList(corsConfigurations);
    client.setBucketBucketCors(request);

    注意:

    • 通过此接口设置CORS规则之前,Bucket的CORS权限设置为不允许跨域。
    • 每个Bucket最多只允许有一个规则文件,因此新上传的规则文件会覆盖原有的。
    • CORS规则文件大小限制为20KB,因此请求时大于20KB会返回超出大小错误(400 Bad Request: EntityTooLarge)。

    获取CORS规则

    可以通过如下方式获取跨域规则:

    GetBucketCorsRequest request = new GetBucketCorsRequest();
    request.setBucketName("yourBucketName");
    GetBucketCorsResponse response = client.getBucketCros(request);

    删除CORS规则

    可以通过如下方式删除跨域规则:

    DeleteBucketCorsRequest request = new DeleteBucketCorsRequest("yourBucketName");
    client.deleteBucketCors(request);

    设置访问日志

    BOS SDK支持将用户访问Bucket时的请求记录记录为日志,会包括请求者、Bucket名称、请求时间和请求操作等。关于Bucket日志的详细功能说明可参见设置访问日志

    开启Bucket日志

    • 请求参数
    名称 描述 类型 是否必须
    targetBucket 指定存放访问日志的Bucket 字符串
    targetPrefix 指定最终被保存的访问日志文件前缀 字符串 否(建议填写,用以区分访问日志)
    • 目前提供两种方式供用户使用 1、以Json格式的字符串 2、用户只需指定指定参数即可

    可以通过如下两种方式设置日志规则:

    // 1、以Json格式的字符串
    SetBucketLoggingRequest setBucketLoggingRequest = new SetBucketLoggingRequest();
    setBucketLoggingRequest.setBucketName("yourBucketName");
    String jsonPutBucketLogging = "{\"targetBucket\":\"yourTargetBucketName\""+",\"targetPrefix\":\"mylog1/\"}";
    setBucketLoggingRequest.setJsonPutBucketLogging(jsonPutBucketLogging);
    client.setBucketLogging(setBucketLoggingRequest);
    // 2、用户只需指定指定参数即可
    SetBucketLoggingRequest request = new SetBucketLoggingRequest();
    request.setBucketName("yourBucketName");
    request.setTargetBucket("yourTargetBucketName");
    request.setTargetPrefix("mylog/");
    client.setBucketLogging(request);

    查看Bucket日志设置

    可以通过如下方式获取日志规则:

    GetBucketLoggingRequest request = new GetBucketLoggingRequest();
    request.withBucketName("yourBucketName");
    GetBucketLoggingResponse response = client.getBucketLogging(request);

    关闭Bucket日志

    可以通过如下方式关闭日志规则:

    DeleteBucketLoggingRequest request = new DeleteBucketLoggingRequest("yourBucketName");
    client.deleteBucketLogging(request);
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