Spring引导Angular2文件下载不起作用

Question

我遇到了一个问题，从带有angular2的Spring boot加载文件。

这是我在spring boot的代码，它来自:使用spring MVC返回生成的pdf。我可以用postman直接下载文件，但不能用angular2...

@RequestMapping(value="/file/{id}", method=RequestMethod.GET)
public ResponseEntity<?> getFile(@PathVariable("id") long id) {
    UploadFile uFile = uploadFileService.getUploadFileById(id);


    byte[] contents = uFile.getContent();

    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.parseMediaType("application/pdf"));
    headers.setContentDispositionFormData(uFile.getName(), uFile.getName());
    headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");

    return new ResponseEntity<byte[]>(contents, headers, HttpStatus.OK);
}

Angular2服务

downloadFile( id: number ){
    let headers = new Headers({'Content-Type': 'application/pdf', 'Accept': 'application/pdf'});
    headers.append('Authorization',this.auth.token);
    let options = new RequestOptions( { headers: headers, responseType: ResponseContentType.Blob});

    return this.http.get(this.editUrl + id, options)
    .map(res => {return new Blob([res.blob()],{ type: 'application/pdf' })});
}

和下载按钮

downloadFile(uFile: UploadFile){
    this.uploadFileService.downloadFile(uFile.id)
        .subscribe(
                data => window.open(URL.createObjectURL(data)),
            );
    return false;
}

当我点击下载按钮chrome打开新标签并立即关闭它不显示任何文件。以下是Postman的一些响应标题。

Access-Control-Allow-Headers →Content-Type, x-requested-with, Authorization, responseType
Access-Control-Allow-Methods →POST, PUT, GET, PATCH, OPTIONS, DELETE
Access-Control-Allow-Origin →http://localhost:4200
Access-Control-Max-Age →3600
Cache-Control →must-revalidate, post-check=0, pre-check=0
Content-Disposition →form-data; name="reference.pdf"; filename="reference.pdf"
Content-Length →31576
Content-Type →application/pdf
Date →Mon, 27 Mar 2017 08:39:24 GMT
X-Content-Type-Options →nosniff
X-Frame-Options →DENY
X-XSS-Protection →1; mode=block

Answer 1

Spring Boot解决方案基于使用Spring MVC返回生成的pdf，PDF Blob上的Angular2未显示内容，Angular 2。有问题的代码完全正常工作。使用pdf文件自动关闭选项卡的原因是chrome中的Adblock插件。