Package net.sourceforge.plantuml.servlet

Class ProxyServlet

java.lang.Object

jakarta.servlet.GenericServlet

jakarta.servlet.http.HttpServlet

net.sourceforge.plantuml.servlet.ProxyServlet

All Implemented Interfaces:

jakarta.servlet.Servlet, jakarta.servlet.ServletConfig, Serializable

public class ProxyServlet
extends jakarta.servlet.http.HttpServlet

Proxy servlet of the webapp. This servlet retrieves the diagram source of a web resource (web html page) and renders it.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
ProxyServlet()

Method Summary

Modifier and Type	Method	Description
void	doGet(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response)
static boolean	forbiddenURL(String full)
static HttpURLConnection	getConnection(URL url)	Get open http connection from URL.
static URL	validateURL(String url, jakarta.servlet.http.HttpServletResponse response)	Validate external URL.

Methods inherited from class jakarta.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class jakarta.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProxyServlet

public ProxyServlet()

Method Detail

forbiddenURL

public static boolean forbiddenURL(String full)

validateURL

public static URL validateURL(String url,
                              jakarta.servlet.http.HttpServletResponse response)
                       throws IOException

Validate external URL.

Parameters:

url - URL to validate

response - response object to `sendError` including error message; if `null` no error will be send

Returns:

valid URL; otherwise `null`

Throws:

IOException - `response.sendError` can result in a `IOException`

doGet

public void doGet(jakarta.servlet.http.HttpServletRequest request,
                  jakarta.servlet.http.HttpServletResponse response)
           throws IOException,
                  jakarta.servlet.ServletException

Overrides:

doGet in class jakarta.servlet.http.HttpServlet

Throws:

IOException

jakarta.servlet.ServletException

getConnection

public static HttpURLConnection getConnection(URL url)
                                       throws IOException

Get open http connection from URL.

Parameters:

url - URL to open connection

Returns:

open http connection

Throws:

IOException - if an input or output exception occurred