X-Git-Url: https://code.wpia.club/?a=blobdiff_plain;f=src%2Forg%2Fcacert%2Fgigi%2Foutput%2Ftemplate%2FForm.java;fp=src%2Forg%2Fcacert%2Fgigi%2Foutput%2Ftemplate%2FForm.java;h=f469c21c68bf53080d4f40863cb1e67a85dedc36;hb=cd14b85c60f736a643842b421b11f41d8fca86c7;hp=0000000000000000000000000000000000000000;hpb=1db93167c35304e1d56e99dae6aa1cfa83842a2e;p=gigi.git

diff --git a/src/org/cacert/gigi/output/template/Form.java b/src/org/cacert/gigi/output/template/Form.java
new file mode 100644
index 00000000..f469c21c
--- /dev/null
+++ b/src/org/cacert/gigi/output/template/Form.java
@@ -0,0 +1,103 @@
+package org.cacert.gigi.output.template;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Map;
+
+import javax.servlet.ServletRequest;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpSession;
+
+import org.cacert.gigi.GigiApiException;
+import org.cacert.gigi.localisation.Language;
+import org.cacert.gigi.pages.Page;
+import org.cacert.gigi.util.RandomToken;
+
+public abstract class Form implements Outputable {
+
+    public static final String CSRF_FIELD = "csrf";
+
+    private String csrf;
+
+    public Form(HttpServletRequest hsr) {
+        csrf = RandomToken.generateToken(32);
+        HttpSession hs = hsr.getSession();
+        hs.setAttribute("form/" + getClass().getName() + "/" + csrf, this);
+
+    }
+
+    public abstract boolean submit(PrintWriter out, HttpServletRequest req) throws GigiApiException;
+
+    protected String getCsrfFieldName() {
+        return CSRF_FIELD;
+    }
+
+    @Override
+    public void output(PrintWriter out, Language l, Map<String, Object> vars) {
+        out.println("<form method='POST'>");
+        failed = false;
+        outputContent(out, l, vars);
+        out.print("<input type='hidden' name='" + CSRF_FIELD + "' value='");
+        out.print(getCSRFToken());
+        out.println("'></form>");
+    }
+
+    protected abstract void outputContent(PrintWriter out, Language l, Map<String, Object> vars);
+
+    boolean failed;
+
+    protected void outputError(PrintWriter out, ServletRequest req, String text, Object... contents) {
+        if ( !failed) {
+            failed = true;
+            out.println("<div class='formError'>");
+        }
+        out.print("<div>");
+        if (contents.length == 0) {
+            out.print(Page.translate(req, text));
+        } else {
+            out.print(String.format(Page.translate(req, text), contents));
+        }
+        out.println("</div>");
+    }
+
+    protected void outputErrorPlain(PrintWriter out, String text) {
+        if ( !failed) {
+            failed = true;
+            out.println("<div class='formError'>");
+        }
+        out.print("<div>");
+        out.print(text);
+        out.println("</div>");
+    }
+
+    public boolean isFailed(PrintWriter out) {
+        if (failed) {
+            out.println("</div>");
+        }
+        return failed;
+    }
+
+    protected String getCSRFToken() {
+        return csrf;
+    }
+
+    public static <T extends Form> T getForm(HttpServletRequest req, Class<T> target) throws CSRFException {
+        String csrf = req.getParameter(CSRF_FIELD);
+        if (csrf == null) {
+            throw new CSRFException();
+        }
+        HttpSession hs = req.getSession();
+        if (hs == null) {
+            throw new CSRFException();
+        }
+        Form f = (Form) hs.getAttribute("form/" + target.getName() + "/" + csrf);
+        if (f == null) {
+            throw new CSRFException();
+        }
+        return (T) f;
+    }
+
+    public static class CSRFException extends IOException {
+
+    }
+}