Tomcat 8 is not able to handle get request with in query parameters

Question

I am using Tomcat 8  In one case I need to handle external request coming from external source where the request has a parameters where it is separated by     Request is looks like this   http   localhost 8080 app handleResponse msg name id   In this case I am getting following error   java lang IllegalArgumentException  Invalid character found in the request target  The valid characters are defined in RFC 7230 and RFC 3986     at org apache coyote http11 Http11InputBuffer parseRequestLine Http11InputBuffer java 467      at org apache coyote http11 Http11Processor service Http11Processor java 667      at org apache coyote AbstractProcessorLight process AbstractProcessorLight java 66      at org apache coyote AbstractProtocol ConnectionHandler process AbstractProtocol java 789      at org apache tomcat util net NioEndpoint SocketProcessor doRun NioEndpoint java 1455      at org apache tomcat util net SocketProcessorBase run SocketProcessorBase java 49      at java util concurrent ThreadPoolExecutor runWorker ThreadPoolExecutor java 1142      at java util concurrent ThreadPoolExecutor Worker run ThreadPoolExecutor java 617      at org apache tomcat util threads TaskThread WrappingRunnable run TaskThread java 61      at java lang Thread run Thread java 745    EDIT 1  It works with Apache Tomcat 8 0 30 but not with Tomcat 8 5

User · Answer

The URI is encoded as UTF-8  but Tomcat is decoding them as ISO-8859-1  You need to edit the connector settings in the server xml and add the URIEncoding  UTF-8  attribute   or edit this parameter on your application properties  server tomcat uri-encoding utf-8

User · Answer

Issue  Tomcat  7 0 88  is throwing below exception which leads to 400     Bad Request   java lang IllegalArgumentException  Invalid character found in the request target   The valid characters are defined in RFC 7230 and RFC 3986    This issue is occurring most of the tomcat versions from 7 0 88 onwards   Solution   Suggested by Apache team    Tomcat increased their security and no longer allows raw square brackets in the query string  In the request we have      Square brackets  so the request is not processed by the server   Add relaxedQueryChars attribute under  tag under server xml   TOMCAT HOME  conf     lt Connector port  80              protocol  HTTP 1 1             maxThreads  150             connectionTimeout  20000             redirectPort  443             compression  on             compressionMinSize  2048             noCompressionUserAgents  gozilla  traviata             compressableMimeType  text html text xml                                       relaxedQueryChars                      gt    If application needs more special characters that are not supported by tomcat by default  then add those special characters in relaxedQueryChars attribute  comma-separated as above

User · Answer

This behavior is introduced in all major Tomcat releases    Tomcat 7 0 73  8 0 39  8 5 7   To fix  do one of the following    set relaxedQueryChars to allow this character  recommended  see Lincoln s answer  set requestTargetAllow option  deprecated in Tomcat 8 5   see J  r  mie s answer   you can downgrade to one of older versions  not recommended - security      Based on changelog  those changes could affect this behavior   Tomcat 8 5 3      Ensure that requests with HTTP method names that are not tokens  as required by RFC 7231  are rejected with a 400 response   Tomcat 8 5 7      Add additional checks for valid characters to the HTTP request line parsing so invalid request lines are rejected sooner      The best option  following the standard  - you want to encode your URL on client   encodeURI  http   localhost 8080 app handleResponse msg name id     gt  http   localhost 8080 app handleResponse msg name 7Cid 7C   or just query string   encodeURIComponent  msg name id     gt  msg 3Dname 7Cid 7C   It will secure you from other problematic characters  list of invalid URI characters

User · Answer

Adding  quot relaxedQueryChars quot  attribute to the server xml worked for me    lt Connector connectionTimeout  quot 20000 quot  port  quot 8080 quot  protocol  quot HTTP 1 1 quot  redirectPort  quot 443 quot  URIEncoding  quot UTF-8 quot  relaxedQueryChars  quot        amp  x5c  amp  x60  amp quot  amp lt  amp gt  quot   gt

User · Answer

The parameter tomcat util http parser HttpParser requestTargetAllow is deprecated since Tomcat 8 5  tomcat official doc   You can use relaxedQueryChars   relaxedPathChars in the connectors definition to allow these chars  tomcat official doc

User · Answer

Since Tomcat 7 0 76  8 0 42  8 5 12 you can define property requestTargetAllow to allow forbiden characters   Add this line in your catalina properties   tomcat util http parser HttpParser requestTargetAllow

User · Answer

Escape it   The pipe symbol is one that has been handled differently over time and between browsers   For instance  Chrome and Firefox convert a URL with pipe differently when copy paste them   However  the most compatible  and necessary with Tomcat 8 5 it seems  is to escape it   http   localhost 8080 app handleResponse msg name 7Cid 7C

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