如何查找通过Dropwizard REST API上传的文件的大小

本文介绍了如何查找通过Dropwizard REST API上传的文件的大小的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在使用Dropwizard 0.7.0构建用于文件上传的API.遇到麻烦，无法验证上传的文件大小限制.我想在将文件写入磁盘之前检查大小

I am using Dropwizard 0.7.0 to build an API for file upload. Ran into trouble validating the uploaded file size limit. I want to check the size before writing the file to disk

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
public Response uploadFile(@Context final HttpServletRequest request, @FormDataParam("file") FormDataBodyPart fileBodyPart) {

    /*
     * Check the request size
     */
    request.getPart("file").getSize();
.........
}

它会引发错误:

java.lang.IllegalStateException: No multipart config for servlet
at org.eclipse.jetty.server.Request.getParts(Request.java:2075) ~[jetty-  server-9.0.7.v20131107.jar:9.0.7.v20131107]
at org.eclipse.jetty.server.Request.getPart(Request.java:2055) ~[jetty-server-9.0.7.v20131107.jar:9.0.7.v20131107]

编辑----------------------

EDIT ----------------------

@David

升级到dropwizard 0.8.0，但遇到另一个错误

Upgraded to dropwizard 0.8.0 however ran into another error

com.sun.jersey.spi.inject.Errors: The following errors and warnings have been detected with resource and/or provider classes:
org.glassfish.jersey.media.multipart.file.FormDataBodyPart
org.glassfish.jersey.media.multipart.file.FileDataBodyPart
org.glassfish.jersey.media.multipart.FormDataContentDisposition

使用这些依赖项

<dependency>
 <groupId>io.dropwizard</groupId>
 <artifactId>dropwizard-forms</artifactId>
 <version>${dropwizard.version}</version>
</dependency>

和

<dependency>
 <groupId>org.glassfish.jersey.media</groupId>
 <artifactId>jersey-media-multipart</artifactId>
 <version>2.23.2</version>
</dependency>

已添加

bootstrap.addBundle(new MultiPartBundle());

(也是第一次失败之后)

and this too (after first failure)

env.jersey().register(MultiPartFeature.class);

我在这里想念什么?

推荐答案

要提交多部分数据，还需要一个额外的dropwizard依赖项.对于0.8及更高版本，依赖性为dropwizard-forms.

Being able to submit multipart data requires an additional dropwizard dependency. For 0.8 and higher the dependency is dropwizard-forms.

<dependency>
    <groupId>io.dropwizard</groupId>
    <artifactId>dropwizard-forms</artifactId>
    <version>${dropwizard.version}</version>
</dependency>

http://www.dropwizard.io/0.8.0 /docs/manual/forms.html

示例用法:

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFile(
        @FormDataParam("myFileName") InputStream file,
        @FormDataParam("myFileName") FormDataContentDisposition fileMetaData
){

    long fileSize = fileMetaData.getSize();
    // etc
}

这就是我正在使用的.也许升级是您的解决方案.

This is what I'm using. Perhaps upgrading is a solution for you.

如果没有，则有可能使用dropwizard 0.7，但我不必这样做...从一个快速的google看来，您需要以下依赖项:

If not, it is possible for dropwizard 0.7 but I haven't had to do it... From a quick google, it looks like you need the following dependency:

<dependency>
    <groupId>com.sun.jersey.contribs</groupId>
    <artifactId>jersey-multipart</artifactId>
    <version>1.18.1</version>
</dependency>

...，然后将以下内容添加到您的应用程序run方法中:

... and add the following to your applications run method:

environment.jersey().register(MultiPartFeature.class);

鉴于错误没有针对servlet的多部分配置"，我假设您的上载在没有大小检查的情况下根本无法使用?

Given the error "No multipart config for servlet" I'm assuming your upload doesn't work at all, without your size check?

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