X-Git-Url: http://jaekl.net/gitweb/?p=frank.git;a=blobdiff_plain;f=prod%2Fnet%2Fjaekl%2Ffrank%2FErrorHandler.java;fp=prod%2Fnet%2Fjaekl%2Ffrank%2FErrorHandler.java;h=c1d72bd8d96bcaa8c3fc35434b66ae707275ee2f;hp=0000000000000000000000000000000000000000;hb=60dc53edca9ae2bcd6703e02b26acd47ef3d61a8;hpb=418e4d229a8b607b022cfb867bb702bec1765d13
diff --git a/prod/net/jaekl/frank/ErrorHandler.java b/prod/net/jaekl/frank/ErrorHandler.java
new file mode 100644
index 0000000..c1d72bd
--- /dev/null
+++ b/prod/net/jaekl/frank/ErrorHandler.java
@@ -0,0 +1,105 @@
+package net.jaekl.frank;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.io.PrintWriter;
+import java.util.Locale;
+
+import net.jaekl.qd.http.InvalidResponseException;
+
+public class ErrorHandler {
+ static final String JAVASCRIPT =
+ "";
+
+ void writeScript(PrintWriter pw) {
+ pw.println(JAVASCRIPT);
+ }
+
+ void explain(PrintWriter pw, Throwable t, FrankBundle bundle) {
+ Throwable cause = t;
+ if (t instanceof FrankException) {
+ if (null != t.getCause()) {
+ cause = t.getCause();
+ }
+ }
+
+ pw.println("");
+ if (cause instanceof InvalidResponseException) {
+ InvalidResponseException ire = (InvalidResponseException)cause;
+
+ pw.println(bundle.get(FrankBundle.INVALID_RESPONSE));
+ pw.println("
");
+ pw.println("
");
+ pw.println(" " + bundle.get(FrankBundle.URL_CONTACTED)
+ + " " + ire.getUrl() + " " + bundle.get(FrankBundle.REQUEST_MADE)
+ + " " + ire.getMethod() + " " + bundle.get(FrankBundle.ANSWER_RECEIVED)
+ + " " + ire.getResponse() + "
");
+ pw.println("");
+ pw.println("" + bundle.get(FrankBundle.MAYBE_SERVER_PROBLEM) + "
");
+ }
+ else {
+ pw.println(bundle.get(FrankBundle.UNEXPECTED_EXCEPTION));
+ }
+ pw.println("");
+ }
+
+ void writeErrorPage(PrintWriter pw, Throwable t, Locale locale) {
+ Style style = new Style();
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ PrintStream ps = new PrintStream(baos);
+ FrankBundle bundle = FrankBundle.getInst(locale);
+
+ pw.println("");
+ pw.println("" +
+ bundle.get(FrankBundle.FRANK) + ": " +
+ bundle.get(FrankBundle.ERROR_PAGE) +
+ " ");
+ style.writeStyle(pw);
+ writeScript(pw);
+ pw.println("");
+
+ pw.println("");
+ pw.println("" +
+ bundle.get(FrankBundle.FRANK) + ": " +
+ bundle.get(FrankBundle.UNEXPECTED_ERROR) +
+ "
");
+
+ explain(pw, t, bundle);
+
+ // Note that, if we cared about security, we would log this stack trace to a
+ // server log, and only report a cross-reference to the log file back to the
+ // end user's browser, to avoid potentially exposing internal info that we
+ // don't want to share.
+ // At least at this point, we don't care (that much), and trade off a
+ // potential information leak in favour of reducing our code complexity
+ // and the administrator's workload.
+
+ pw.println("
");
+ pw.println("");
+ pw.println("
");
+
+ t.printStackTrace(ps);
+ String stackTrace = baos.toString();
+ pw.println(stackTrace);
+
+ pw.println(" \n\n
Click here to return to the main page.
");
+ pw.println("");
+ }
+}