Spring HATEOAS用于void下载方法的模板链接

时间:2017-11-01 21:32:56

标签: java spring spring-hateoas

我的控制器中有一个方法如下:

\2

我想使用Spring提供的ControllerLinkBuilder类为此方法生成模板化的HATEOAS链接。我的链接应该如下:

    @RequestMapping(value = "/download/attachment/{attachmentId}", method = RequestMethod.GET)
public void download(@PathVariable("attachmentId") String attachmentId, HttpServletRequest request,
        HttpServletResponse response) throws IOException {
    InputStream file = myCustomObject.getAttachmentById(attachmentId);
    response.setContentType("application/octet-stream");
    response.flushBuffer();
}

我使用以下代码在我的ResourceAssembler类(扩展ResourceAssemblerSupport)中执行此操作:

"download" : {
          "href" : "https://localhost:8080/download/attachment/{attachmentId}"
}

我从中获得的链接不是模板化的。它是URL编码的。 “{”以%7B的形式发送。我不希望这种情况发生。任何人都可以提出任何建议吗?

1 个答案:

答案 0 :(得分:1)

好的,所以我使用以下方法解决了这个问题:

            Link downloadAttachmentByIdLink = new Link(
                new UriTemplate(
                        linkTo(MyRestController.class,
                                MyRestController.class.getMethod("download", String.class,
                                        HttpServletRequest.class, HttpServletResponse.class),
                                "").toUriComponentsBuilder().build().toUriString(),
                        new TemplateVariables(
                                new TemplateVariable("attachmentId", TemplateVariable.VariableType.SEGMENT))),
                "download");