Get full URL and query string in Servlet for both HTTP and HTTPS requests

Question

I am writing a code which task is to retrieve a requested URL or full path  I ve written this code    HttpServletRequest request   obtained from other functions String uri   request getRequestURI    if  request getQueryString      null      uri          request getQueryString      So  when I browse http   google com q abc it is OK  correct   But there is problem when I browse https   google com  The value of uri is http   google com 443google com 443  So the program doesn t only when HTTPS is used   And the output is same for request getRequestURL   toString      What is the solution

User · Answer

I know this is a Java question  but if you re using Kotlin you can do this quite nicely   val uri   request run       if  queryString isNullOrBlank    requestURI else   requestURI  queryString

User · Answer

By design  getRequestURL   gives you the full URL  missing only the query string  In HttpServletRequest  you can get individual parts of the URI using the methods below     Example  http   myhost 8080 people lastname Fox amp age 30  String uri   request getScheme      quot     quot          quot http quot     quot                  request getServerName               quot myhost quot                quot   quot                                  quot   quot               request getServerPort               quot 8080 quot               request getRequestURI               quot  people quot                quot   quot                                  quot   quot               request getQueryString              quot lastname Fox amp age 30 quot     getScheme   will give you  quot https quot  if it was a https   domain request   getServerName   gives domain on http s    domain   getServerPort   will give you the port   Use the snippet below  String uri   request getScheme      quot     quot                 request getServerName                     quot http quot  equals request getScheme     amp  amp  request getServerPort      80     quot https quot  equals request getScheme     amp  amp  request getServerPort      443    quot  quot     quot   quot    request getServerPort                    request getRequestURI                  request getQueryString      null    quot   quot    request getQueryString      quot  quot     This snippet above will get the full URI  hiding the port if the default one was used  and not adding the  quot   quot  and the query string if the latter was not provided   Proxied requests Note  that if your request passes through a proxy  you need to look at the X-Forwarded-Proto header since the scheme might be altered  request getHeader  quot X-Forwarded-Proto quot    Also  a common header is X-Forwarded-For  which show the original request IP instead of the proxys IP  request getHeader  quot X-Forwarded-For quot    If you are responsible for the configuration of the proxy load balancer yourself  you need to ensure that these headers are set upon forwarding

User · Answer

The fact that a HTTPS request becomes HTTP when you tried to construct the URL on server side indicates that you might have a proxy load balancer  nginx  pound  etc   offloading SSL encryption in front and forward to your back end service in plain HTTP   If that s case  check    whether your proxy has been set up to forward headers correctly  Host  X-forwarded-proto  X-forwarded-for  etc     whether your service container  E g  Tomcat  is set up to recognize the proxy in front  For example  Tomcat requires adding secure  true  scheme  https  proxyPort  443  attributes to its Connector whether your code  or service container is processing the headers correctly  For example  Tomcat automatically replaces scheme  remoteAddr  etc  values when you add RemoteIpValve to its Engine   see Configuration guide  JavaDoc  so  you don t have to process these headers in your code manually    Incorrect proxy header values could result in incorrect output when request getRequestURI   or request getRequestURL   attempts to construct the originating URL

User · Answer

Simply Use  String Uri   request getRequestURL    quot   quot  request getQueryString

[java] Get full URL and query string in Servlet for both HTTP and HTTPS requests

Examples related to java

Examples related to servlets

Examples related to httprequest