private void getServices(HttpServletResponse res) { InputStream is = null; try { URL url = ctx.getResource(resourcesDir + XHP_CONFIG); // use classpath if not found locally. if (url == null) url = XmlHttpProxyServlet.class.getResource(classpathResourcesDir + XHP_CONFIG); is = url.openStream(); } catch (Exception ex) { try { getLogger().severe("XmlHttpProxyServlet error loading xhp.json : " + ex); PrintWriter writer = res.getWriter(); writer.write( "XmlHttpProxyServlet Error: Error loading xhp.json. Make sure it is available in the /resources directory of your applicaton."); writer.flush(); } catch (Exception iox) { } } services = xhp.loadServices(is); }
/** Check to see if the configuration file has been updated so that it may be reloaded. */ private boolean configUpdated() { try { URL url = ctx.getResource(resourcesDir + XHP_CONFIG); URLConnection con; if (url == null) return false; con = url.openConnection(); long lastModified = con.getLastModified(); long XHP_LAST_MODIFIEDModified = 0; if (ctx.getAttribute(XHP_LAST_MODIFIED) != null) { XHP_LAST_MODIFIEDModified = ((Long) ctx.getAttribute(XHP_LAST_MODIFIED)).longValue(); } else { ctx.setAttribute(XHP_LAST_MODIFIED, new Long(lastModified)); return false; } if (XHP_LAST_MODIFIEDModified < lastModified) { ctx.setAttribute(XHP_LAST_MODIFIED, new Long(lastModified)); return true; } } catch (Exception ex) { getLogger().severe("XmlHttpProxyServlet error checking configuration: " + ex); } return false; }
public void doProcess(HttpServletRequest req, HttpServletResponse res, boolean isPost) { StringBuffer bodyContent = null; OutputStream out = null; PrintWriter writer = null; String serviceKey = null; try { BufferedReader in = req.getReader(); String line = null; while ((line = in.readLine()) != null) { if (bodyContent == null) bodyContent = new StringBuffer(); bodyContent.append(line); } } catch (Exception e) { } try { if (requireSession) { // check to see if there was a session created for this request // if not assume it was from another domain and blow up // Wrap this to prevent Portlet exeptions HttpSession session = req.getSession(false); if (session == null) { res.setStatus(HttpServletResponse.SC_FORBIDDEN); return; } } serviceKey = req.getParameter("id"); // only to preven regressions - Remove before 1.0 if (serviceKey == null) serviceKey = req.getParameter("key"); // check if the services have been loaded or if they need to be reloaded if (services == null || configUpdated()) { getServices(res); } String urlString = null; String xslURLString = null; String userName = null; String password = null; String format = "json"; String callback = req.getParameter("callback"); String urlParams = req.getParameter("urlparams"); String countString = req.getParameter("count"); // encode the url to prevent spaces from being passed along if (urlParams != null) { urlParams = urlParams.replace(' ', '+'); } try { if (services.has(serviceKey)) { JSONObject service = services.getJSONObject(serviceKey); // default to the service default if no url parameters are specified if (urlParams == null && service.has("defaultURLParams")) { urlParams = service.getString("defaultURLParams"); } String serviceURL = service.getString("url"); // build the URL if (urlParams != null && serviceURL.indexOf("?") == -1) { serviceURL += "?"; } else if (urlParams != null) { serviceURL += "&"; } String apikey = ""; if (service.has("username")) userName = service.getString("username"); if (service.has("password")) password = service.getString("password"); if (service.has("apikey")) apikey = service.getString("apikey"); urlString = serviceURL + apikey; if (urlParams != null) urlString += "&" + urlParams; if (service.has("xslStyleSheet")) { xslURLString = service.getString("xslStyleSheet"); } } // code for passing the url directly through instead of using configuration file else if (req.getParameter("url") != null) { String serviceURL = req.getParameter("url"); // build the URL if (urlParams != null && serviceURL.indexOf("?") == -1) { serviceURL += "?"; } else if (urlParams != null) { serviceURL += "&"; } urlString = serviceURL; if (urlParams != null) urlString += urlParams; } else { writer = res.getWriter(); if (serviceKey == null) writer.write("XmlHttpProxyServlet Error: id parameter specifying serivce required."); else writer.write( "XmlHttpProxyServlet Error : service for id '" + serviceKey + "' not found."); writer.flush(); return; } } catch (Exception ex) { getLogger().severe("XmlHttpProxyServlet Error loading service: " + ex); } Map paramsMap = new HashMap(); paramsMap.put("format", format); // do not allow for xdomain unless the context level setting is enabled. if (callback != null && allowXDomain) { paramsMap.put("callback", callback); } if (countString != null) { paramsMap.put("count", countString); } InputStream xslInputStream = null; if (urlString == null) { writer = res.getWriter(); writer.write( "XmlHttpProxyServlet parameters: id[Required] urlparams[Optional] format[Optional] callback[Optional]"); writer.flush(); return; } // default to JSON res.setContentType(responseContentType); out = res.getOutputStream(); // get the stream for the xsl stylesheet if (xslURLString != null) { // check the web root for the resource URL xslURL = null; xslURL = ctx.getResource(resourcesDir + "xsl/" + xslURLString); // if not in the web root check the classpath if (xslURL == null) { xslURL = XmlHttpProxyServlet.class.getResource(classpathResourcesDir + "xsl/" + xslURLString); } if (xslURL != null) { xslInputStream = xslURL.openStream(); } else { String message = "Could not locate the XSL stylesheet provided for service id " + serviceKey + ". Please check the XMLHttpProxy configuration."; getLogger().severe(message); try { out.write(message.getBytes()); out.flush(); return; } catch (java.io.IOException iox) { } } } if (!isPost) { xhp.doGet(urlString, out, xslInputStream, paramsMap, userName, password); } else { if (bodyContent == null) getLogger() .info( "XmlHttpProxyServlet attempting to post to url " + urlString + " with no body content"); xhp.doPost( urlString, out, xslInputStream, paramsMap, bodyContent.toString(), req.getContentType(), userName, password); } } catch (Exception iox) { iox.printStackTrace(); getLogger().severe("XmlHttpProxyServlet: caught " + iox); try { writer = res.getWriter(); writer.write(iox.toString()); writer.flush(); } catch (java.io.IOException ix) { ix.printStackTrace(); } return; } finally { try { if (out != null) out.close(); if (writer != null) writer.close(); } catch (java.io.IOException iox) { } } }