Introducing Java Servlet Container beta.

2019-02-28 18:02:42 +03:00
parent ec7319d32c
commit 5bfdebb9e4
95 changed files with 13360 additions and 1 deletions
--- a/test/java/forward/app.java
+++ b/test/java/forward/app.java
@@ -0,0 +1,138 @@
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import java.util.Map;
+
+import javax.servlet.DispatcherType;
+import javax.servlet.RequestDispatcher;
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletRequestWrapper;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpServletResponseWrapper;
+
+public class app extends HttpServlet
+{
+    private String id;
+
+    private class RequestWrapper extends HttpServletRequestWrapper
+    {
+        public RequestWrapper(HttpServletRequest r)
+        {
+            super(r);
+        }
+    }
+
+    private class ResponseWrapper extends HttpServletResponseWrapper
+    {
+        public ResponseWrapper(HttpServletResponse r)
+        {
+            super(r);
+        }
+    }
+
+    @Override
+    public void init(ServletConfig sc)
+        throws ServletException
+    {
+        id = sc.getInitParameter("id");
+    }
+
+    private RequestDispatcher getRequestDispatcher(HttpServletRequest request, String str)
+    {
+        String disp = request.getParameter("disp");
+
+        if (disp != null && disp.equals("ctx")) {
+            return request.getServletContext().getRequestDispatcher(str);
+        }
+
+        if (disp != null && disp.equals("name")) {
+            return request.getServletContext().getNamedDispatcher(str);
+        }
+
+        if (disp == null || disp.equals("req")) {
+            return request.getRequestDispatcher(str);
+        }
+
+        return null;
+    }
+
+    @Override
+    public void doGet(HttpServletRequest request, HttpServletResponse response)
+        throws IOException, ServletException
+    {
+        String dtype = "" + request.getDispatcherType();
+
+        response.addHeader("X-" + dtype + "-Id", id);
+        response.addHeader("X-" + dtype + "-Request-URI", "" + request.getRequestURI());
+        response.addHeader("X-" + dtype + "-Servlet-Path", "" + request.getServletPath());
+        response.addHeader("X-" + dtype + "-Path-Info", "" + request.getPathInfo());
+        response.addHeader("X-" + dtype + "-Query-String", "" + request.getQueryString());
+        response.addHeader("X-" + dtype + "-Dispatcher-Type", "" + request.getDispatcherType());
+
+        response.setContentType("text/plain; charset=utf-8");
+
+        Map<String, String[]> pmap = request.getParameterMap();
+
+        for (Map.Entry<String,String[]> p : pmap.entrySet()) {
+            response.addHeader("X-" + dtype + "-Param-" + p.getKey(), "" + String.join(",", p.getValue()));
+        }
+
+        PrintWriter out = response.getWriter();
+
+        if (id.equals("fwd")) {
+            String uri = request.getParameter("uri");
+
+            if (uri != null && request.getDispatcherType() != DispatcherType.FORWARD) {
+                response.addHeader("X-Forward-To", "" + uri);
+
+                out.println("Before forwarding.");
+
+                RequestDispatcher d = getRequestDispatcher(request, uri);
+
+                if (d == null) {
+                    out.println("Dispatcher is null");
+                    return;
+                }
+
+                try {
+                    d.forward(new RequestWrapper(request), new ResponseWrapper(response));
+                } catch(Exception e) {
+                    response.addHeader("X-Exception", "" + e);
+                }
+
+                response.addHeader("X-After-Forwarding", "you-should-not-see-this");
+
+                out.println("After forwarding.");
+
+                return;
+            }
+        }
+
+        if (id.equals("data")) {
+            response.addHeader("X-" + RequestDispatcher.FORWARD_REQUEST_URI, "" + request.getAttribute(RequestDispatcher.FORWARD_REQUEST_URI));
+            response.addHeader("X-" + RequestDispatcher.FORWARD_CONTEXT_PATH, "" + request.getAttribute(RequestDispatcher.FORWARD_CONTEXT_PATH));
+            response.addHeader("X-" + RequestDispatcher.FORWARD_SERVLET_PATH, "" + request.getAttribute(RequestDispatcher.FORWARD_SERVLET_PATH));
+            response.addHeader("X-" + RequestDispatcher.FORWARD_PATH_INFO, "" + request.getAttribute(RequestDispatcher.FORWARD_PATH_INFO));
+            response.addHeader("X-" + RequestDispatcher.FORWARD_QUERY_STRING, "" + request.getAttribute(RequestDispatcher.FORWARD_QUERY_STRING));
+
+            out.println("app.doGet(): #" + this + ", " + id);
+            out.println("RequestURI:  " + request.getRequestURI());
+            out.println("ServletPath: " + request.getServletPath());
+            out.println("PathInfo:    " + request.getPathInfo());
+            out.println("DispType:    " + request.getDispatcherType());
+            out.println("QueryString: " + request.getQueryString());
+
+            for (Map.Entry<String,String[]> p : pmap.entrySet()) {
+                out.println("- " + p.getKey() + "=" + String.join(",", p.getValue()));
+            }
+
+            return;
+        }
+
+        response.sendError(404);
+    }
+}