View pdf from spring get request via react/axios - reactjs

Question

I have a spring endpoint that serves a pdf as a byte[] and a React ui that is getting a 406 when I try to call the endpoint.
spring endpoint:
#GetMapping(value = "report/{report_id}", produces = MediaType.APPLICATION_PDF_VALUE)
public ResponseEntity<InputStreamResource> generateReviewTaskReport(
HttpServletResponse response,
#PathVariable("report_id") String reportId,
#RequestAttribute(USER_ID) String loginId) {
byte[] report = reportService.generateReport(reportId, loginId);
ByteArrayInputStream inputStream = new ByteArrayInputStream(report);
HttpHeaders headers = new HttpHeaders();
headers.setContentLength(report.length);
headers.add("Content-Disposition", "inline;filename=" + reportId + "_report.pdf");
return ResponseEntity
.ok()
.headers(headers)
.contentType(MediaType.APPLICATION_PDF)
.body(new InputStreamResource(inputStream));
}
I've tried:
headers.add("Content-Disposition", "attachment;filename=" + reportId + "_report.pdf");
same result.
react request:
export const getReport = (reportId = '') => (dispatch) => {
const report = `${apiConfig.reportUrl}${reportId}`
const promise = axios.get(report,
{
responseType: 'blob',
headers: {
'Accept': 'application/pdf'
}
})
return dispatch({
type: GET_REPORT,
payload: promise,
})
}
case GET_REPORT:
if (payload.data) {
const report = new Blob([payload.data])
reportUrl = URL.createObjectURL(report)
window.open(reportUrl, "_blank")
}
I've tried responseType: 'bufferArray', returning a plain byte[] from my spring endpoint, always get a 406. I'm guessing it's because I have the wrong mime type in my 'Accept' header. I've tried 'application/pdf' and '*/*', same result. What headers do I need to accept an InputStreamResource or byte[]?
With postman I can download the file just fine.
my config:
#Component
public class WebConfiguration extends WebMvcConfigurationSupport {
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(byteArrayHttpMessageConverter());
converters.add(new ResourceHttpMessageConverter());
}
#Bean
public HttpMessageConverter byteArrayHttpMessageConverter() {
ByteArrayHttpMessageConverter arrayHttpMessageConverter =
new ByteArrayHttpMessageConverter();
arrayHttpMessageConverter.setSupportedMediaTypes(getSupportedMediaTypes());
return arrayHttpMessageConverter;
}
private List<MediaType> getSupportedMediaTypes() {
List<MediaType> mediaTypes = new ArrayList<>();
mediaTypes.add(MediaType.APPLICATION_PDF);
mediaTypes.add(MediaType.APPLICATION_OCTET_STREAM);
return mediaTypes;
}
}

Answer 1

A general solution, but i think in you'r case it should works fine ;)
axios({
url: 'http://api.dev/file-download', //your url
method: 'GET',
responseType: 'blob', // important
}).then((response) => {
const url = window.URL.createObjectURL(new Blob([response.data]));
const link = document.createElement('a');
link.href = url;
link.setAttribute('download', 'file.pdf'); //or any other extension
document.body.appendChild(link);
link.click();
});
gist: https://gist.github.com/javilobo8/097c30a233786be52070986d8cdb1743
Full credits to: https://gist.github.com/javilobo8