I am trying to make a ajax call to other domain locally from my computer by writing some proxy code in jsp. And this is my jQuery AJAX code that is calling proxy.jsp page.
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var metadata = 'https://rest-search.host.com/machine/search/meta?id=';var on_show_info= function() { var AjaxCall = data + current_doc_info.id; alert(AjaxCall); request_meta_info = $.ajax({ url: "proxy.jsp?url=" + AjaxCall, type: 'GET', success: check, error: error }); };And my JSP file is:-
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<%@ page language="java" import="org.w3c.dom.*,javax.xml.parsers.DocumentBuilder,javax.xml.parsers.DocumentBuilderFactory,java.net.*,java.io.*" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%><%String urlToQuery = request.getParameter("url");System.out.println("rj " +urlToQuery);URL url = new URL(urlToQuery);final String login ="user";final String password ="pass";Authenticator.setDefault(new Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication (login, password.toCharArray()); }});URLConnection conn = url.openConnection();InputStream in = conn.getInputStream();DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();DocumentBuilder db =dbf.newDocumentBuilder();Document doc=db.parse(urlToQuery);NodeList nl= doc.getElementsByTagName("attr");%><%= nl.item(0).getFirstChild().getNodeValue() %> And When I check the response, I am getting this error for the XML file it is parsing:
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/><title>Error 500 White spaces are required between publicId and systemId.</title></head><body><h2>HTTP ERROR 500</h2><p>Problem accessing /proxy.jsp. Reason:<pre> White spaces are required between publicId and systemId.</pre></p><h3>Caused by:</h3><pre>org.xml.sax.SAXParseException: White spaces are required between publicId and systemId. at org.apache.xerces.parsers.DOMParser.parse(Unknown Source) at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source) at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:180) at org.apache.jsp.proxy_jsp._jspService(org.apache.jsp.proxy_jsp:70) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:389) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126) at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213) at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171) at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145) at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:67) at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:122) at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:110) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:536) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:915) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:405) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)</pre><hr /><i><small>Powered by Jetty://</small></i><br/> </body></html>And the XMl file is this:-
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<results><result><attr value="HW/SW" name="Line"/><attr value="ASIC" name="Description"/><attr value="CD" name="Number"/><attr value="AS" name="DocumentType"/><attr value="" name="Date"/><</result></results>What wrong I am doing here.. Any suggestions will be appreciated..
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Answer
The error message is actually correct if not obvious. It says that your DOCTYPE must have a SYSTEM identifier. I assume yours only has a public identifier.
You’ll get the error with (for instance):
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<!DOCTYPE persistence PUBLIC "http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">You won’t with:
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<!DOCTYPE persistence PUBLIC "http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" "">Notice "" at the end in the second one — that’s the system identifier. The error message is confusing: it should say that you need a system identifier, not that you need a space between the publicId and the (non-existent) systemId.
By the way, an empty system identifier might not be ideal, but it might be enough to get you moving.