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Whenever I try to put special characters in the URL as follows in the Mozilla Firefox browser

https://URL/|

or

https://URL/]

Tomcat is returning HTTP Status 400 – Bad Requestand exception stack trace as follows.

Type Exception ReportMessage Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986Description The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).Exceptionjava.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986    org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:474)    org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:294)    org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)    org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:770)    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)    org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)    java.lang.Thread.run(Thread.java:748)Note The full stack trace of the root cause is available in the server logs.

Surprisingly same URL with special characters works properly in Google Chrome browser.

I have the following questions1) What changes should I do in the tomcat configuration file so that it shouldn't return 400 status code and exception stack trace?2) Why Mozilla Firefox is failing to encode the URL?

Note: I have already configured one common page for the status code of type 4XX in my application deployed at tomcat 9 but problem is tomcat is returning 400 bad request http status code in response at first place itself.

Is there any way to create the query parameters for doing a GET request in JavaScript?

Just like in Python you have urllib.urlencode(), which takes in a dictionary (or list of two tuples) and creates a string like 'var1=value1&var2=value2'.

I have got a String which is encoded in C type encoding(Let me know if there is a better name for that), ie the new lines has been converted into \n and tabs into \t. I want to URLEncode the String but the Encoder is encoding the \ into %5C and leaving n behind. For eg: abc\ndef\tghi\njkl is being encoded into abc%5Cndef%5Ctghi%5Cnjkl.Is there any way to change the String in such a way that encoder reads \n as the new line. There are a few hacky and some very hacky ways but I want to avoid them

okay, so according to http://docs.python.org/library/urllib.html

"The order of parameters in the encoded string will match the order of parameter tuples in the sequence."

except when I try to run this code:

import urllibvalues ={'one':'one',         'two':'two',         'three':'three',         'four':'four',         'five':'five',         'six':'six',         'seven':'seven'}data=urllib.urlencode(values)print data

outputs as ...

seven=seven&six=six&three=three&two=two&four=four&five=five&one=one

7,6,3,2,4,5,1?

That doesn't look like the order of my tuples.

When searchItem parameter has special characters like "+", the special character is omitted out upon hitting the endpoint.I tried URL encoding the parameter but that causes a 404 error too.Please help

    [HttpGet]    [Route("search/{searchItem}")]    public HttpResponseMessage Search(string searchItem)    {        return Request.CreateResponse(HttpStatusCode.OK);    }