Dies ist also im Grunde Lathys Antwort, ABER aktualisiert für neuere Anforderungen für ServletInputStream.
Nämlich (für ServletInputStream) muss Folgendes implementiert werden:
public abstract boolean isFinished();
public abstract boolean isReady();
public abstract void setReadListener(ReadListener var1);
Dies ist das bearbeitete Objekt von Lathy
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public class RequestWrapper extends HttpServletRequestWrapper {
private String _body;
public RequestWrapper(HttpServletRequest request) throws IOException {
super(request);
_body = "";
BufferedReader bufferedReader = request.getReader();
String line;
while ((line = bufferedReader.readLine()) != null){
_body += line;
}
}
@Override
public ServletInputStream getInputStream() throws IOException {
CustomServletInputStream kid = new CustomServletInputStream(_body.getBytes());
return kid;
}
@Override
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(this.getInputStream()));
}
}
und irgendwo (??) habe ich das gefunden (das ist eine erstklassige Klasse, die sich mit den "zusätzlichen" Methoden befasst.
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
public class CustomServletInputStream extends ServletInputStream {
private byte[] myBytes;
private int lastIndexRetrieved = -1;
private ReadListener readListener = null;
public CustomServletInputStream(String s) {
try {
this.myBytes = s.getBytes("UTF-8");
} catch (UnsupportedEncodingException ex) {
throw new IllegalStateException("JVM did not support UTF-8", ex);
}
}
public CustomServletInputStream(byte[] inputBytes) {
this.myBytes = inputBytes;
}
@Override
public boolean isFinished() {
return (lastIndexRetrieved == myBytes.length - 1);
}
@Override
public boolean isReady() {
// This implementation will never block
// We also never need to call the readListener from this method, as this method will never return false
return isFinished();
}
@Override
public void setReadListener(ReadListener readListener) {
this.readListener = readListener;
if (!isFinished()) {
try {
readListener.onDataAvailable();
} catch (IOException e) {
readListener.onError(e);
}
} else {
try {
readListener.onAllDataRead();
} catch (IOException e) {
readListener.onError(e);
}
}
}
@Override
public int read() throws IOException {
int i;
if (!isFinished()) {
i = myBytes[lastIndexRetrieved + 1];
lastIndexRetrieved++;
if (isFinished() && (readListener != null)) {
try {
readListener.onAllDataRead();
} catch (IOException ex) {
readListener.onError(ex);
throw ex;
}
}
return i;
} else {
return -1;
}
}
};
Letztendlich habe ich nur versucht, die Anfragen zu protokollieren. Und die oben genannten frankensteined zusammen Stücke halfen mir, das unten zu schaffen.
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.Principal;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.IOUtils;
//one or the other based on spring version
//import org.springframework.boot.autoconfigure.web.ErrorAttributes;
import org.springframework.boot.web.servlet.error.ErrorAttributes;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.filter.OncePerRequestFilter;
/**
* A filter which logs web requests that lead to an error in the system.
*/
@Component
public class LogRequestFilter extends OncePerRequestFilter implements Ordered {
// I tried apache.commons and slf4g loggers. (one or the other in these next 2 lines of declaration */
//private final static org.apache.commons.logging.Log logger = org.apache.commons.logging.LogFactory.getLog(LogRequestFilter.class);
private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(LogRequestFilter.class);
// put filter at the end of all other filters to make sure we are processing after all others
private int order = Ordered.LOWEST_PRECEDENCE - 8;
private ErrorAttributes errorAttributes;
@Override
public int getOrder() {
return order;
}
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
String temp = ""; /* for a breakpoint, remove for production/real code */
/* change to true for easy way to comment out this code, remove this if-check for production/real code */
if (false) {
filterChain.doFilter(request, response);
return;
}
/* make a "copy" to avoid issues with body-can-only-read-once issues */
RequestWrapper reqWrapper = new RequestWrapper(request);
int status = HttpStatus.INTERNAL_SERVER_ERROR.value();
// pass through filter chain to do the actual request handling
filterChain.doFilter(reqWrapper, response);
status = response.getStatus();
try {
Map<String, Object> traceMap = getTrace(reqWrapper, status);
// body can only be read after the actual request handling was done!
this.getBodyFromTheRequestCopy(reqWrapper, traceMap);
/* now do something with all the pieces of information gatherered */
this.logTrace(reqWrapper, traceMap);
} catch (Exception ex) {
logger.error("LogRequestFilter FAILED: " + ex.getMessage(), ex);
}
}
private void getBodyFromTheRequestCopy(RequestWrapper rw, Map<String, Object> trace) {
try {
if (rw != null) {
byte[] buf = IOUtils.toByteArray(rw.getInputStream());
//byte[] buf = rw.getInputStream();
if (buf.length > 0) {
String payloadSlimmed;
try {
String payload = new String(buf, 0, buf.length, rw.getCharacterEncoding());
payloadSlimmed = payload.trim().replaceAll(" +", " ");
} catch (UnsupportedEncodingException ex) {
payloadSlimmed = "[unknown]";
}
trace.put("body", payloadSlimmed);
}
}
} catch (IOException ioex) {
trace.put("body", "EXCEPTION: " + ioex.getMessage());
}
}
private void logTrace(HttpServletRequest request, Map<String, Object> trace) {
Object method = trace.get("method");
Object path = trace.get("path");
Object statusCode = trace.get("statusCode");
logger.info(String.format("%s %s produced an status code '%s'. Trace: '%s'", method, path, statusCode,
trace));
}
protected Map<String, Object> getTrace(HttpServletRequest request, int status) {
Throwable exception = (Throwable) request.getAttribute("javax.servlet.error.exception");
Principal principal = request.getUserPrincipal();
Map<String, Object> trace = new LinkedHashMap<String, Object>();
trace.put("method", request.getMethod());
trace.put("path", request.getRequestURI());
if (null != principal) {
trace.put("principal", principal.getName());
}
trace.put("query", request.getQueryString());
trace.put("statusCode", status);
Enumeration headerNames = request.getHeaderNames();
while (headerNames.hasMoreElements()) {
String key = (String) headerNames.nextElement();
String value = request.getHeader(key);
trace.put("header:" + key, value);
}
if (exception != null && this.errorAttributes != null) {
trace.put("error", this.errorAttributes
.getErrorAttributes((WebRequest) new ServletRequestAttributes(request), true));
}
return trace;
}
}
Bitte nehmen Sie diesen Code mit einem Körnchen Salz.
Der wichtigste "Test" ist, ob ein POST mit einer Nutzlast arbeitet. Dies ist es, was "Double Read" -Probleme aufdeckt.
Pseudo-Beispielcode
import org.springframework.web.bind.annotation.*;
@RestController
@RequestMapping("myroute")
public class MyController {
@RequestMapping(method = RequestMethod.POST, produces = "application/json")
@ResponseBody
public String getSomethingExample(@RequestBody MyCustomObject input) {
String returnValue = "";
return returnValue;
}
}
Sie können "MyCustomObject" durch "Object" ersetzen, wenn Sie nur testen möchten.
Diese Antwort basiert auf verschiedenen SOF-Posts und Beispielen. Es hat jedoch eine Weile gedauert, bis alles zusammengekommen ist. Ich hoffe, es hilft einem zukünftigen Leser.
Bitte stimmen Sie Lathys Antwort vor meiner zu. Ohne sie hätte ich nicht so weit kommen können.
Unten ist eine / einige der Ausnahmen, die ich beim Ausarbeiten bekommen habe.
getReader () wurde bereits für diese Anfrage aufgerufen
Es sieht so aus, als wären einige der Orte, von denen ich "geliehen" habe, hier:
http://slackspace.de/articles/log-request-body-with-spring-boot/
https://github.com/c0nscience/spring-web-logging/blob/master/src/main/java/org/zalando/springframework/web/logging/LoggingFilter.java
https://howtodoinjava.com/servlets/httpservletrequestwrapper-example-read-request-body/
https://www.oodlestechnologies.com/blogs/How-to-create-duplicate-object-of-httpServletRequest-object
https://github.com/c0nscience/spring-web-logging/blob/master/src/main/java/org/zalando/springframework/web/logging/LoggingFilter.java