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[英]Sending MultiPartFile as JSON request Property to Spring Boot REST COntroller
[英]Process compressed json request in Spring Boot Rest Controller
我一直在嘗試處理 RequestBody,它是作為 GZIP 發送的 JSON 數據。 在我的 RestController 中,我有以下方法:
@RequestMapping(value = "/api/data", method = RequestMethod.POST)
public ResponseEntity<String> updateData(@RequestBody String data) {
System.out.println(data);
return new ResponseEntity(HttpStatus.CREATED);
}
發送到控制器的“數據”是 GZIP 格式的 JSON,當我打印它時,它都是經過編碼的。 如何解碼/解壓縮此數據?
最后,我從不同的來源抓取了答案。 下面是一個例子:
@Component
public class GzipBodyDecompressFilter implements Filter {
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
request = new GzippedInputStreamWrapper((HttpServletRequest) servletRequest);
chain.doFilter(request, response);
}
final class GzippedInputStreamWrapper extends HttpServletRequestWrapper {
public static final String DEFAULT_ENCODING = "ISO-8859-1";
private byte[] bytes;
public GzippedInputStreamWrapper(final HttpServletRequest request) throws IOException {
super(request);
try {
final InputStream in = new GZIPInputStream(request.getInputStream());
bytes = IOUtils.toByteArray(in);
} catch (EOFException e) {
bytes = new byte[0];
}
}
@Override
public ServletInputStream getInputStream() throws IOException {
final ByteArrayInputStream sourceStream = new ByteArrayInputStream(bytes);
return new ServletInputStream() {
public int read() throws IOException {
return sourceStream.read();
}
@Override
public void setReadListener(ReadListener listener) {
// TODO Auto-generated method stub
}
@Override
public boolean isFinished() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean isReady() {
// TODO Auto-generated method stub
return false;
}
public void close() throws IOException {
super.close();
sourceStream.close();
}
};
}
@Override
public Map getParameterMap() {
return super.getParameterMap();
}
}
}
doFilter方法將在它到達控制器之前執行,在該方法中我可以對請求的主體執行任何操作(因為我可以訪問 ServletRequest),例如為HttpServletRequestWrapper創建一個實現,在其中解壓縮內容。
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