Merge branch 'master' of ssh://wpitchoune.net/srv/git/pnews

[pnews.git] / war / src / main / java / pnews / servlet / Pnews.java

diff --git a/war/src/main/java/pnews/servlet/Pnews.java b/war/src/main/java/pnews/servlet/Pnews.java
index 85f726b..845abbb 100644 (file)
--- a/war/src/main/java/pnews/servlet/Pnews.java
+++ b/war/src/main/java/pnews/servlet/Pnews.java
@@ -1,7 +1,170 @@
 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.ServletConfig;
+import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
+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) {
+                        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;
+
+                LOG.entering(Pnews.class.getName(), "redirect");
+
+                try {
+                        redirectURL = getQueryParameter(rq, "url");
+
+                        LOG.info("Request redirection to " + redirectURL);
+
+                        if (redirectURL != null) {
+                                rp.setHeader("Location", redirectURL);
+                                rp.setStatus(HttpServletResponse.SC_TEMPORARY_REDIRECT);
+                        } else {
+                                LOG.severe("No redirection URL");
+                                rp.setStatus(HttpServletResponse.SC_NOT_FOUND);
+                        }
+
+                } catch (UnsupportedEncodingException e) {
+                        e.printStackTrace();
+                        LOG.log(Level.SEVERE, "redirect failure", e);
+                        rp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+                }
+
+                LOG.exiting(Pnews.class.getName(), "redirect");
+        }
+
+        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");
+                                rp.getWriter().write(html);
+                        } 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) {
+                String path;
+                InputStream in;
+
+                LOG.info("doGet " + req.getRequestURI());
+
+                path = req.getPathInfo();
+
+                if (path.equals("/redirect")) {
+                        redirect(req, resp);
+                        return ;
+                }
+
+                if (path.equals("/style.css")) {
+                        try {
+                                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 ;
+                }
+
+                for (Category cat: Category.values()) {
+                        if (path.equals('/' + cat.getId())) {
+                                writeArticles(cat, resp);
+                                return ;
+                        }
+                }
+
+                try {
+                        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());
 
+        }
 }