forked from I2P_Developers/i2p.i2p
62 lines
2.4 KiB
Plaintext
62 lines
2.4 KiB
Plaintext
<%
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/*
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* USE CAUTION WHEN EDITING
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* Trailing whitespace OR NEWLINE on the last line will cause
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* IllegalStateExceptions !!!
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*
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* Do not tag this file for translation.
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*/
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/**
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* flags.jsp?c=de => icons/flags/de.png
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* with headers set so the browser caches.
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*/
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String c = request.getParameter("c");
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if (c != null &&
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(c.length() == 2 || c.length() == 7) &&
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c.replaceAll("[a-z0-9_]", "").length() == 0) {
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java.io.OutputStream cout = response.getOutputStream();
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String base = net.i2p.I2PAppContext.getGlobalContext().getBaseDir().getAbsolutePath();
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String file = "docs" + java.io.File.separatorChar + "icons" + java.io.File.separatorChar +
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"flags" + java.io.File.separatorChar + c + ".png";
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java.io.File ffile = new java.io.File(base, file);
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long lastmod = ffile.lastModified();
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if (lastmod > 0) {
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long iflast = request.getDateHeader("If-Modified-Since");
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// iflast is -1 if not present; round down file time
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if (iflast >= ((lastmod / 1000) * 1000)) {
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response.sendError(304, "Not Modified");
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return;
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}
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response.setDateHeader("Last-Modified", lastmod);
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// cache for a day
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response.setDateHeader("Expires", net.i2p.I2PAppContext.getGlobalContext().clock().now() + 86400000l);
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response.setHeader("Cache-Control", "public, max-age=86400");
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}
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long length = ffile.length();
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if (length > 0)
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response.setHeader("Content-Length", Long.toString(length));
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response.setContentType("image/png");
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try {
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net.i2p.util.FileUtil.readFile(file, base, cout);
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} catch (java.io.IOException ioe) {
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// prevent 'Committed' IllegalStateException from Jetty
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if (!response.isCommitted()) {
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response.sendError(403, ioe.toString());
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} else {
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// not an error, happens when the browser closes the stream
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net.i2p.I2PAppContext.getGlobalContext().logManager().getLog(getClass()).warn("Error serving flags/" + c + ".png", ioe);
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// Jetty doesn't log this
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throw ioe;
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}
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}
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} else {
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/*
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* Send a 403 instead of a 404, because the server sends error.jsp
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* for 404 errors, complete with the summary bar, which would be
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* a huge load for a page full of flags if the user didn't have the
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* flags directory for some reason.
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*/
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response.sendError(403, "No flag specified");
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}
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%> |