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;
-
+
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);
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 {
+
+ try {
articles = provider.getArticles(cat);
if (articles != null) {
html = HTML.toHTML(articles, cat);
rp.getWriter().write(html);
} else {
LOG.severe("writeArticles cannot retrieve any articles");
- html = HTML.toHTML(new ArrayList<>(), cat);
+ html = HTML.toHTML(new ArrayList<Article>(), cat);
rp.setContentType("text/html");
rp.getWriter().write(html);
}
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);
+ writer.write(buf, 0, n);
}
-
+
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
String path;
InputStream in;
-
- LOG.info("doGet " + req.getRequestURI());
+ LOG.info("doGet " + req.getRemoteAddr().toString() + " " + req.getRequestURI() + " " + req.getQueryString());
+
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);
resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
}
-
+
@Override
public void init(ServletConfig config) throws ServletException {
LOG.info("Pnews servlet init " + config.getServletContext().getContextPath());
-
+
}
}