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[英]HTTPUrlConnection and application/octet-stream content-type response handling
[英]Download file of content-type octet-stream using restTemplate
在我的應用程序中,我收到來自 API 響應的文件,其Content-Type
為application/octet-stream
。
我正在嘗試將此文件作為ResponseEntity<Resource>
返回到前端。
但我收到錯誤:
RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.http.ResponseEntity] and content type [application/octet-stream]
通過瀏覽一些文檔,我想到了使用與RestTemplate.getForEntity相同的responseEntityExtractor
。
我的代碼:
RequestCallback requestCallback = request -> {
HttpHeaders headers1 = request
.getHeaders();
headers1.set("Authorization", "Bearer " + template.getAccessToken());
headers1
.setAccept(Arrays.asList(MediaType.APPLICATION_OCTET_STREAM, MediaType.ALL));
};
ResponseExtractor<ResponseEntity<Resource>> responseExtractor = template.responseEntityExtractor(ResponseEntity.class);
template.execute(url, HttpMethod.GET, requestCallback, responseExtractor, uriVariables);
可以理解的是,通過在請求回調中設置setAccept
,我們讓restTemplate
知道期望什么類型的內容,並且responseEntityExtractor()
將返回ResponseExtractor<ResponseEntity<T>>
。
我錯過了什么?
代替:
ResponseExtractor<ResponseEntity<Resource>> responseExtractor = template.responseEntityExtractor(ResponseEntity.class);
試試這個在 controller 方法中返回byte[]
:
ResponseExtractor<ResponseEntity<byte[]>> responseExtractor = template.responseEntityExtractor(byte[].class);
ResponseEntity<byte[]> results = template.responseEntityExtractor(byte[].class);
return results.getBody();
或返回ResponseEntity<Resource>
:
ResponseExtractor<ResponseEntity<byte[]>> responseExtractor = template.responseEntityExtractor(byte[].class);
ResponseEntity<byte[]> results = template.responseEntityExtractor(byte[].class);
ByteArrayResource byteArrayResource = new ByteArrayResource(results.getBody());
return new ResponseEntity<Resource>(byteArrayResource, null, HttpStatus.OK);
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