您的位置:

利用Minio工具类提升网页可访问性的方法

一、什么是Minio

Minio是一种对象存储服务,拥有极高的可用性和持久性。用户可以使用Minio来存储和访问大量的对象数据,包括图片、视频、文档等。Minio还支持通过AWS S3 API进行数据访问,也可以直接在网页中使用Minio API进行数据上传和下载。

二、Minio在提升网页可访问性中的应用

在网页中,我们常常需要使用图片和其他媒体资源,这些资源需要存储在服务器上。使用Minio可以方便地将这些资源存储在云端,降低服务器压力,同时提高网页的访问速度。另外,Minio还支持自定义存储桶的访问权限,可以根据具体需求对不同桶的访问进行限制。

三、使用Minio API上传文件

在网页中,我们常常需要上传文件,比如用户上传头像等。可以使用Minio API来实现文件上传。下面是一个简单的前端上传文件的示例代码:


<form method='post' action='http://localhost:9000/upload' enctype='multipart/form-data'>
    <input type='file' name='file'>
    <input type='submit' value='上传'>
</form>

在后端,我们可以使用Minio提供的Java API来实现文件上传。下面是一个简单的文件上传方法的示例代码:


public Boolean uploadFile(InputStream inputStream, String bucketName, String fileName) {
    try {
        // 初始化Minio客户端
        MinioClient minioClient = new MinioClient("http://localhost:9000", "ACCESSKEY", "SECRETKEY");
        // 判断桶是否存在,不存在则创建桶
        if (!minioClient.bucketExists(bucketName)) {
            minioClient.makeBucket(bucketName);
        }
        // 使用putObject方法上传文件
        minioClient.putObject(bucketName, fileName, inputStream, null);
        return true;
    } catch (Exception e) {
        return false;
    }
}

四、使用Minio API下载文件

在网页中,我们常常需要下载文件,比如用户下载某个文件。可以使用Minio API来实现文件下载。下面是一个简单的前端下载文件的示例代码:


<a href='http://localhost:9000/download/bucketName/fileName' download='fileName'>下载</a>

在后端,我们可以使用Minio提供的Java API来实现文件下载。下面是一个简单的文件下载方法的示例代码:


public InputStream downloadFile(String bucketName, String fileName) {
    try {
        // 初始化Minio客户端
        MinioClient minioClient = new MinioClient("http://localhost:9000", "ACCESSKEY", "SECRETKEY");
        // 使用getObject方法下载文件
        return minioClient.getObject(bucketName, fileName);
    } catch (Exception e) {
        return null;
    }
}

五、使用Minio控制桶的访问权限

在网页中,我们需要对不同桶的访问进行限制,比如一个桶只有管理员才能访问。可以使用Minio API来控制桶的访问权限。下面是一个简单的桶访问控制方法的示例代码:


public void setBucketPolicy(String bucketName, String policy) {
    try {
        // 初始化Minio客户端
        MinioClient minioClient = new MinioClient("http://localhost:9000", "ACCESSKEY", "SECRETKEY");
        // 使用setBucketPolicy方法设置桶的访问策略
        minioClient.setBucketPolicy(bucketName, policy);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

在进行桶访问控制时,需要注意使用合适的访问策略来控制桶的访问,比如只允许特定用户访问。

六、总结

利用Minio工具类可以提升网页可访问性,减轻服务器压力,提高访问速度。通过Minio API,可以方便地实现文件上传和下载,并对不同桶的访问进行控制。建议在开发网页时,考虑使用Minio来进行文件管理。

利用Minio工具类提升网页可访问性的方法

2023-05-17
when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${item.id} [in template "article/detail/index.ftl" at line 48, column 106] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:481) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:401) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:370) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:371) at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:321) at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271) at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:244) at freemarker.core.Environment.visitIteratorBlock(Environment.java:645) at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:108) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94) at freemarker.core.Environment.visit(Environment.java:335) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.process(Environment.java:314) at freemarker.template.Template.process(Template.java:383) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:332) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:266) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:220) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:181) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1431) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1167) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1106) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at com.software.filter.HttpSpiderIdentifyFilter.doFilter(HttpSpiderIdentifyFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at java.base/java.lang.VirtualThread.run(VirtualThread.java:309)