grunt-contrib-connect middleware redirect function

README.md

GOAL

grunt-contrib-connect middleware redirect function. easy to use make fake api for front-end. This sample used yeoman generator gruntfile.

how to use

• download redirect.js to project root.
• edit Gruntfile.js

var redirect = require('./redirect');

...
...


connect: {
    options: {
        port: 9000,
        // change this to '0.0.0.0' to access the server from outside
        hostname: '0.0.0.0'
    },
    livereload: {
        options: {
            middleware: function(connect) {
                return [
                    lrSnippet,
                    mountFolder(connect, '.tmp'),
                    mountFolder(connect, 'app'),
                    redirect('api')
                ];
            }
        }
    }
},

• the redirect with 3 arguments. rootDir is fake api root folder. indexFile is default file. headers is response header for example:

/app
    ...

/api
    /user
        index.json
        list.json
...

/Gruntfile.js
...

• run grunt server
  • access /user will response /api/user/index.json
  • access /user/list.json will response /api/user/list.json

redirect.js

var fs = require('fs'),
    url = require('url');

module.exports = function(rootDir, indexFile, headers) {
    'use strict';

    indexFile = indexFile || 'index.json';

    var defaults = {
        'Content-Type': 'text/plain'
    };

    console.log('--------------------------------------------------');
    console.log('redirect = ', rootDir, ' || indexFile = ', indexFile);
    if(headers){
        console.log('headers = ', headers);
    }else{
        headers = {};
    }
    console.log('--------------------------------------------------');

    // setup default values
    for(var i in defaults) {
        if(!headers[i]) {
            headers[i] = defaults[i];
        }
    }

    return function(req, res, next) {
        var path = url.parse(req.url).pathname,
            filePath = './' + rootDir + path + '/' + indexFile;

        if(path.match(/\..{3}/g)){
            filePath = './' + rootDir + path;
        }

        fs.readFile( filePath, function(error, buffer) {
            if (error){
                return next(error);
            }

            // set content length
            headers['Content-Length'] = buffer.length;

            var resp = {
                headers: headers,
                body: buffer
            };

            res.writeHead(200, resp.headers);
            res.end(resp.body);
        });
    };
};