My program throws this exception online,I know the reason why it is wrong.My question is how do I find the wrong place,The Java cannot catch the location of this exception.How do I get additional information about this exception,For example, the API for this error requested address.
The error message is as follows:
2019-01-18 07:49:23.076 [http-nio-127.0.0.1-8081-exec-96] INFO org.apache.coyote.http11.Http11Processor - Error parsing HTTP request headerNote: further occurrences of HTTP header parsing errors will be logged at DEBUG level.java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:484)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:684)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Unknown Source)Best Answer
If you use an upper version of Tomcat 8.5 it throws this exception if the URL path contains '[' and ']'. For older versions, it works.
The workaround would be adding below attributes to http connector port in tomcat server.xml file
relaxedPathChars="[]|" relaxedQueryChars="[]|{}^\`"<>"The error message says "Invalid character found in the request target". This means the HTTP client sent a request for a resource that had an invalid characters in it. The server can not parse the request because the request did not adhere to the HTTP protocol specifications.
This is a client problem. Fix the client.
If it is a public server, maybe someone is trying to break in by sending malformed requests (it's common).
I encountered the same error when sending location of a file in a AJAX GET request.
Since the location had characters which are not recognized. I.e. "C:///" etc, the error was thrown.
The use of encodeURIComponent helped me fix the issue since it encodes the component.
When you pass the location make sure you add those inside "encodeURIComponent" method. In my case:
$.ajax({type: "GET",url: 'removeFile?removeFilePath=' + encodeURIComponent("C:///YO/Ed/PO/")data: {},dataType: 'json',Used Tomcat v8.5, below update in server.xml works for me since '<>' is not allowed
<Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443" relaxedPathChars="[]|" relaxedQueryChars="[]|{}^`'"/>