Wilfred/metawiki

"use strict";

var restify = require("restify");
var path = require("path");
var fs = require("fs");

var models = require("./models");

function serve(request, response, next) {
  var urlPath = request.params[0];

  models.Resource.findOne(
    {
      path: urlPath
    },
    function(err, resource) {
      if (resource === null) {
        // TODO: should be JSON with an error reason.
        next(
          new restify.NotFoundError("No resource with path '" + urlPath + "'")
        );
      } else {
        response.writeHead(200, {
          "Content-Type": resource.mimeType + "; charset=UTF-8"
        });

        if (resource.content) {
          response.write(resource.content);
          response.end();
        } else if (resource.localPath) {
          // TODO: store both text and binary in mongo
          var appDir = path.dirname(require.main.filename);
          var absPath = path.join(
            appDir,
            "..",
            "..",
            "binary_files",
            resource.localPath
          );

          // TODO: unit test to verify we don't allow directory
          // travel if localPath contains '..'.
          fs.readFile(absPath, function(err, data) {
            if (err) throw err; // TODO: HTTP 500/404 as appropriate

            response.write(data);
            response.end();
          });
        }
        next();
      }
    }
  );
}

module.exports = {
  serve: serve
};