Add a few tools function for http servers.

src/nodetk/server_tools.js

@@ -0,0 +1,59 @@
+var URL = require("url");
+
+
+exports.get_connector_from_str_routes = function(routes) {
+  /* Returns connect middleware from given routes.
+   *
+   * Arguments:
+   *  - routes: hash looking like:
+   *      {'GET': {"/toto": fct, "/titi": fct},
+   *       'POST': {"/toto": fct},
+   *       'DELETE': {"/tutu/tata/": fct}
+   *       }
+   *  
+   *  The routes arg is used to search where to route the current req.
+   *  If nothing found, next() is called.
+   *
+   *  NOTE: pathnames must be strings, no regexp.
+   *
+   */
+  return function(req, res, next) {
+    var url = URL.parse(req.url);
+    var method = routes[req.method] && routes[req.method][url.pathname];
+    if(method) method(req, res);
+    else next();
+  };
+};
+
+
+exports.redirect = function(res, url) {
+  /* Send redirection HTTP reply to result.
+   *
+   * Arguments:
+   *  - res: nodejs result object.
+   *  - url: where to redirect.
+   *
+   */
+  res.writeHead(303, {'Location': url});
+  res.end();
+};
+
+
+exports.server_error = function(res, err) {
+  /* Send HTTP 500 result with details about error in body.
+   * The content-type is set to text/plain.
+   *
+   * Arguments:
+   *  - res: nodejs result object.
+   *  - err: error object or string.
+   *
+   */
+  res.writeHead(500, {'Content-Type': 'text/plain'});
+  if(typeof err == "string") res.end(err);
+  else {
+    res.write('An error has occured: ' + err.message);
+    res.write('\n\n');
+    res.end(err.stack);
+  }
+};
+