dox-foundation-demo node_modules/express/node_modules/connect/lib/middleware/json.js

utils

declaration
utils

    Description

    Module dependencies.

    Source

    var utils = require('../utils')
      , _limit = require('./limit');

    noop

    function
    noop()

      Description

      noop middleware.

      Source

      function noop(req, res, next) {
        next();
      }
      • @param: {Object}options
      • @return: {Function}

      Description

      JSON:

      Parse JSON request bodies, providing the
      parsed object as req.body.

      Options:

      • strict when false anything JSON.parse() accepts will be parsed
      • reviver used as the second "reviver" argument for JSON.parse
      • limit byte limit disabled by default

      Source

      exports = module.exports = function(options){
        var options = options || {}
          , strict = options.strict !== false;
      
        var limit = options.limit
          ? _limit(options.limit)
          : noop;
      
        return function json(req, res, next) {
          if (req._body) return next();
          req.body = req.body || {};
      
          if (!utils.hasBody(req)) return next();
      
          // check Content-Type
          if (!exports.regexp.test(utils.mime(req))) return next();
      
          // flag as parsed
          req._body = true;
      
          // parse
          limit(req, res, function(err){
            if (err) return next(err);
            var buf = '';
            req.setEncoding('utf8');
            req.on('data', function(chunk){ buf += chunk });
            req.on('end', function(){
              var first = buf.trim()[0];
      
              if (0 == buf.length) {
                return next(utils.error(400, 'invalid json, empty body'));
              }
              
              if (strict && '{' != first && '[' != first) return next(utils.error(400, 'invalid json'));
              try {
                req.body = JSON.parse(buf, options.reviver);
              } catch (err){
                err.body = buf;
                err.status = 400;
                return next(err);
              }
              next();
            });
          });
        };
      };
      
      exports.regexp = /^application\/([\w!#\$%&\*`\-\.\^~]*\+)?json$/i;