Spring REST返回PDF-响应状态406(不可接受) [英] Spring REST returning PDF - Response status 406 (not acceptable)
问题描述
关于此类问题,我在SO上阅读了许多问题,但所有这些问题都建议使用正确的Jackson版本.这是我目前的情况:
I read many questions on SO about this type of issue, but all of them recommend using the correct Jackson version. This is my current situation:
REST API:
@RequestMapping(value = "get/pdf/{id}", headers="Accept=*/*", method = RequestMethod.GET, produces = "application/pdf")
@Override
public ResponseEntity<InputStream> getPdfContractById(@PathVariable("id") Long id);
使用Accept:*/*
会在映射请求时发生错误(发生404)
Using Accept:*/*
produces an error in mapping the request (404 occurs)
从我的pom:
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.4.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.1.1</version>
</dependency>
我还尝试添加这两个依赖项,但没有任何变化:
I also tried to add these two dependencies, but nothing changes:
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
响应客户端:There was an unexpected error (type=Not Acceptable, status=406).
标头包括:
Response client-side: There was an unexpected error (type=Not Acceptable, status=406).
Headers incude:
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding:gzip, deflate, sdch
怎么了?
更多详细信息
我正在使用以下代码返回远程PDF文件:
I am using this code to return the remote PDF file:
URL url = null;
try {
url = new URL(urlStr);
} catch (MalformedURLException e) {
e.printStackTrace();
throw new MyException(e.getMessage());
}
InputStream pdfFile = null;
try {
pdfFile = url.openStream();
} catch (IOException e) {
e.printStackTrace();
throw new MyException(e.getMessage());
}
ResponseEntity<InputStream> re = ResponseEntity
.ok()
// .headers(headers)
// .contentLength(contentLength)
.contentType(
MediaType.parseMediaType("application/pdf"))
.body(pdfFile);
return re;
推荐答案
基本上不需要在RequestMapping中添加produces = "application/pdf"
,因为它似乎尝试在内部转换ResponeBody.您只需将MediaType
添加到所需的响应标题中即可.
Basically there is no need to add produces = "application/pdf"
in RequestMapping as it seems to try to convert the ResponeBody internally. You can just add MediaType
to response headers which is what you need.
@ResponseBody
@RequestMapping(value = "get/pdf/{id}", headers="Accept=*/*", method = RequestMethod.GET)
public ResponseEntity<InputStreamResource> getPdfContractById(@PathVariable("id") Long id){
// Get the remove file based on the fileaddress
RemoteFile remotefile = new RemoteFile(id);
// Set the input stream
InputStream inputstream = remotefile.getInputStream();
// asume that it was a PDF file
HttpHeaders responseHeaders = new HttpHeaders();
InputStreamResource inputStreamResource = new InputStreamResource(inputStream);
responseHeaders.setContentLength(contentLengthOfStream);
responseHeaders.setContentType(MediaType.valueOf("application/pdf"));
// just in case you need to support browsers
responseHeaders.put("Content-Disposition", Collections.singletonList("attachment; filename=somefile.pdf"))
return new ResponseEntity<InputStreamResource> (inputStreamResource,
responseHeaders,
HttpStatus.OK);
}
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