java – 从HttpServletRequest获取XML并使用到端点
作者：互联网
我想从请求和响应中获取XML数据并将其用于Rest控制器.我试过这个：
@RestController()
public class HomeController {
@PostMapping(value = "/v1")
public Response handleMessage(@RequestBody Transaction transaction, HttpServletRequest request, HttpServletResponse response) throws Exception {
HttpServletRequest request, HttpServletResponse response
System.out.println("!!!!!!! InputStream");
System.out.println(request.getInputStream());
System.out.println(response.getOutputStream());
InputStream in = request.getInputStream();
String readLine;
BufferedReader br = new BufferedReader(new InputStreamReader(in));
while (((readLine = br.readLine()) != null)) {
System.out.println(readLine);
}
}
}
但我得到java.io.IOException：UT010029：Stream已关闭
将内容转换为String变量的正确方法是什么？
编辑：我也试过过滤器的解决方案,但我不知道如何将请求有效负载用于休息控制器：
读请求负载：
@Component
public class HttpLoggingFilter implements Filter {
private static final Logger logger = LoggerFactory.getLogger(HttpLoggingFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
ResettableStreamHttpServletRequest wrappedRequest = new ResettableStreamHttpServletRequest((HttpServletRequest) request);
wrappedRequest.getInputStream().read();
String body = IOUtils.toString(wrappedRequest.getReader());
System.out.println("!!!!!!!!!!!!!!!!!! " + body);
wrappedRequest.resetInputStream();
chain.doFilter(request, response);
}
public class ResettableStreamHttpServletRequest extends HttpServletRequestWrapper {
private byte[] rawData;
private HttpServletRequest request;
private ResettableServletInputStream servletStream;
ResettableStreamHttpServletRequest(HttpServletRequest request) {
super(request);
this.request = request;
this.servletStream = new ResettableServletInputStream();
}
void resetInputStream() {
servletStream.stream = new ByteArrayInputStream(rawData);
}
@Override
public ServletInputStream getInputStream() throws IOException {
if (rawData == null) {
rawData = IOUtils.toByteArray(this.request.getInputStream());
servletStream.stream = new ByteArrayInputStream(rawData);
}
return servletStream;
}
@Override
public BufferedReader getReader() throws IOException {
if (rawData == null) {
rawData = IOUtils.toByteArray(this.request.getInputStream());
servletStream.stream = new ByteArrayInputStream(rawData);
}
String encoding = getCharacterEncoding();
if (encoding != null) {
return new BufferedReader(new InputStreamReader(servletStream, encoding));
} else {
return new BufferedReader(new InputStreamReader(servletStream));
}
}
private class ResettableServletInputStream extends ServletInputStream {
private InputStream stream;
@Override
public int read() throws IOException {
return stream.read();
}
@Override
public boolean isFinished() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean isReady() {
// TODO Auto-generated method stub
return false;
}
@Override
public void setReadListener(ReadListener readListener) {
// TODO Auto-generated method stub
}
}
}
}
休息终点：
@RestController()
public class HomeController {
@PostMapping(value = "/v1")
public Response handleMessage(@RequestBody Transaction transaction, HttpServletRequest request, org.zalando.logbook.HttpRequest requestv, HttpServletResponse response) throws Exception {
// Get here request and response and log it into DB
}
}
如何将HttpLoggingFilter调用到Java方法handleMessage中并将请求作为主体字符串获取？可能我可以让它服务并注入它？你能给我一些如何评估代码的建议吗？
解决方法:
这里有一堆类来做.这是一次OncePerRequestFilter实现,请在此处查看https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/filter/OncePerRequestFilter.html.基本上问题是在链式过滤器中,请求流和响应流只能读取一次.因此,需要将这两个流包装在可以多次读取的内容中.
在前两行中,我在requestToUse和responseToUse中包装了请求和响应. ResettableStreamHttpServletRequest和ResettableStreamHttpServletResponse是将原始字符串体保持在其中的包装类,每次需要流时它们都返回一个新流.然后,从那里,您忘记了请求和响应,并开始使用requestToUse和responseToUse.
我从一个古老的项目中拿走了这个.实际上有更多的clases,但我为你提取了主要部分.这可能不会马上编译.试一试让我知道,我会帮助你让它发挥作用.
public class RequestResponseLoggingFilter extends OncePerRequestFilter {
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
//here you wrap the request and response into some resetable istream class
HttpServletRequest requestToUse = new ResettableStreamHttpServletRequest(request);
HttpServletResponse responseToUse = new ResettableStreamHttpServletResponse(response);
//you read the request to log it
byte[] payload = IOUtils.toByteArray(requestToUse.getReader(), requestToUse.getCharacterEncoding());
String body = new String(payload, requestToUse.getCharacterEncoding());
//here you log the body request
log.(body);
//let the chain continue
filterChain.doFilter(requestToUse, responseToUse);
// Here we log the response
String response = new String(responseToUse.toString().getBytes(), responseToUse.getCharacterEncoding());
//since you can read the stream just once, you will need it again for chain to be able to continue, so you reset it
ResettableStreamHttpServletResponse responseWrapper = WebUtils.getNativeResponse(responseToUse, ResettableStreamHttpServletResponse.class);
if (responseWrapper != null) {
responseWrapper.copyBodyToResponse(true);
}
}
}
public class ResettableStreamHttpServletRequest extends HttpServletRequestWrapper {
private byte[] rawData;
private ResettableServletInputStream servletStream;
public ResettableStreamHttpServletRequest(HttpServletRequest request) throws IOException {
super(request);
rawData = IOUtils.toByteArray(request.getInputStream());
servletStream = new ResettableServletInputStream();
servletStream.setStream(new ByteArrayInputStream(rawData));
}
@Override
public ServletInputStream getInputStream() throws IOException {
servletStream.setStream(new ByteArrayInputStream(rawData));
return servletStream;
}
@Override
public BufferedReader getReader() throws IOException {
servletStream.setStream(new ByteArrayInputStream(rawData));
return new BufferedReader(new InputStreamReader(servletStream));
}
}
public class ResettableStreamHttpServletResponse extends HttpServletResponseWrapper {
private ByteArrayServletOutputStream byteArrayServletOutputStream = new ByteArrayServletOutputStream();
public ResettableStreamHttpServletResponse(HttpServletResponse response) throws IOException {
super(response);
}
/**
* Copy the cached body content to the response.
*
* @param complete whether to set a corresponding content length for the complete cached body content
* @since 4.2
*/
public void copyBodyToResponse(boolean complete) throws IOException {
byte[] array = byteArrayServletOutputStream.toByteArray();
if (array.length > 0) {
HttpServletResponse rawResponse = (HttpServletResponse) getResponse();
if (complete && !rawResponse.isCommitted()) {
rawResponse.setContentLength(array.length);
}
rawResponse.getOutputStream().write(byteArrayServletOutputStream.toByteArray());
if (complete) {
super.flushBuffer();
}
}
}
/**
* The default behavior of this method is to return getOutputStream() on the wrapped response object.
*/
@Override
public ServletOutputStream getOutputStream() throws IOException {
return byteArrayServletOutputStream;
}
/**
* The default behavior of this method is to return getOutputStream() on the wrapped response object.
*/
@Override
public String toString() {
String response = new String(byteArrayServletOutputStream.toByteArray());
return response;
}
}
标签：spring-rest,java,spring,spring-boot,rest 来源： https://codeday.me/bug/20190926/1819783.html