package pnews.servlet;
import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
import java.io.UnsupportedEncodingException;
+import java.io.Writer;
import java.net.URLDecoder;
+import java.util.ArrayList;
+import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
+import com.rometools.rome.io.FeedException;
+
+import pnews.Article;
+import pnews.Category;
+import pnews.HTML;
+
public class Pnews extends HttpServlet {
private static final Logger LOG = Logger.getLogger(Pnews.class.getName());
private static final long serialVersionUID = 1L;
+ private static final ArticleProvider provider = ArticleProvider.singleton;
private static String getQueryParameter(HttpServletRequest rq, String key)
throws UnsupportedEncodingException {
String[] params;
int idx;
String q;
-
+
q = rq.getQueryString();
-
+
if (q == null)
return null;
-
+
params = URLDecoder.decode(q, "UTF-8").split("&");
-
- for (String p: params) {
+
+ for (String p: params) {
idx = p.indexOf('=');
-
+
if (idx > 1 && p.substring(0, idx).equals(key))
return p.substring(idx + 1);
}
-
+
return null;
}
-
+
private static void redirect(HttpServletRequest rq, HttpServletResponse rp) {
String redirectURL;
-
+ Article a;
+
+ LOG.entering(Pnews.class.getName(), "redirect");
+
try {
redirectURL = getQueryParameter(rq, "url");
-
+
LOG.info("Request redirection to " + redirectURL);
-
+
if (redirectURL != null) {
+ a = ArticleStore.singleton.get(redirectURL);
+ if (a != null)
+ a.readCount.incrementAndGet();
+ else
+ LOG.severe("Cannot find the article " + redirectURL);
+
rp.setHeader("Location", redirectURL);
rp.setStatus(HttpServletResponse.SC_TEMPORARY_REDIRECT);
} else {
+ LOG.severe("No redirection URL");
rp.setStatus(HttpServletResponse.SC_NOT_FOUND);
}
e.printStackTrace();
LOG.log(Level.SEVERE, "redirect failure", e);
rp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
- }
+ }
+
+ LOG.exiting(Pnews.class.getName(), "redirect");
}
+
+ private void writeStats(HttpServletResponse rp) throws IOException {
+ rp.setContentType("text/html;charset=utf-8");
+ rp.setCharacterEncoding("utf8-8");
+
+ rp.getWriter().write("" + ArticleStore.singleton);
+ }
+
+ private void writeArticles(Category cat, HttpServletResponse rp) {
+ String html;
+ List<Article> articles;
+
+ try {
+ articles = provider.getArticles(cat);
+ if (articles != null) {
+ html = HTML.toHTML(articles, cat);
+ rp.setContentType("text/html;charset=utf-8");
+ rp.getWriter().write(html);
+ rp.setCharacterEncoding("utf8-8");
+ } else {
+ LOG.severe("writeArticles cannot retrieve any articles");
+ html = HTML.toHTML(new ArrayList<Article>(), cat);
+ rp.setContentType("text/html");
+ rp.getWriter().write(html);
+ }
+ } catch (IOException | IllegalArgumentException | FeedException e) {
+ LOG.log(Level.SEVERE, "writeArticles failure", e);
+ rp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+ }
+ }
+
+ private void copy(InputStream in, Writer writer) throws IOException {
+ Reader r;
+ char[] buf;
+ int n;
+
+ buf = new char[1024];
+ r = new InputStreamReader(in);
+ while ( (n = r.read(buf, 0, buf.length)) != -1)
+ writer.write(buf, 0, n);
+ }
+
@Override
- protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
+ protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
String path;
-
- LOG.info("doGet " + req.getRequestURI());
+ InputStream in;
+ RequesterLog.singleton.writeRequest(req);
+
+ LOG.info("doGet " + req.getRemoteAddr().toString() + " " + req.getRequestURI() + " " + req.getQueryString());
+
path = req.getPathInfo();
-
+
if (path.equals("/redirect")) {
redirect(req, resp);
- } else {
+ return ;
+ }
+
+ if (path.equals("/style.css")) {
try {
- resp.getWriter().write("Not found " + req.getPathInfo());
- resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
+ in = HTML.class.getClassLoader().getResourceAsStream("style.css");
+ copy(in, resp.getWriter());
+ resp.setContentType("text/css");
+
+ return ;
} catch (IOException e) {
LOG.log(Level.SEVERE, "doGet failure", e);
+ resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+
+ return ;
}
}
+
+ if (path.equals("/")) {
+ writeArticles(Category.TOP, resp);
+ return ;
+ }
+
+ try {
+
+ if (path.equals("/stats")) {
+ writeStats(resp);
+ return ;
+ }
+
+ for (Category cat: Category.values()) {
+ if (path.equals('/' + cat.getId())) {
+ writeArticles(cat, resp);
+ return ;
+ }
+ }
+
+ resp.getWriter().write("Not found " + req.getPathInfo());
+ resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
+ } catch (IOException e) {
+ LOG.log(Level.SEVERE, "doGet failure", e);
+ resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+ }
}
-
+
@Override
public void init(ServletConfig config) throws ServletException {
LOG.info("Pnews servlet init " + config.getServletContext().getContextPath());
-
+
}
}
projects / pnews.git / blobdiff