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aaronksaunders/parse.js

Created March 24, 2012 05:07
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  1. aaronksaunders created this gist Mar 24, 2012.
    261 changes: 261 additions & 0 deletions parse.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,261 @@
    //Public client interface
    function Client(applicationId, masterKey) {
    this.applicationId = "applicationId";
    this.masterKey = "masterKey";
    }

    exports.Client = Client;

    //Parse API endpoint
    var ENDPOINT = 'https://api.parse.com/1/classes/';

    /*
    * Make an authenticated client request. Argument hash:
    *
    * url: url endpoint to hit
    * method: HTTP method to use
    * payload (optional): A JavaScript object to JSON-serialize
    * success (optional): a function to be called on a successful request
    * error (optional): a function to be called on a server error
    */
    Client.prototype.request = function(args) {
    var xhr = Ti.Network.createHTTPClient(), that = this;

    xhr.onload = function() {
    var response = JSON.parse(this.responseText);
    (args.success) ? args.success(response) : Ti.API.debug('Parse Client: Request Successful');
    };
    xhr.onerror = function() {
    var response = JSON.parse(this.responseText);
    (args.error) ? args.error(response, this) : Ti.API.error('Parse Client: Request Failed: ' + args.url);
    };

    if(args.method == 'PUT' || args.method == 'POST') {
    xhr.open(args.method, ENDPOINT + args.url);
    var authString = Base64.encode(that.applicationId + ':' + that.masterKey);
    xhr.setRequestHeader('Authorization', 'Basic ' + authString);
    xhr.setRequestHeader('Content-Type', 'application/json');
    xhr.send(JSON.stringify(args.payload));
    } else {
    var body = ENDPOINT + args.url + "?";
    var paramMap = args.payload || {};
    for(var a in paramMap) {
    body += Titanium.Network.encodeURIComponent(a) + '=' + Titanium.Network.encodeURIComponent(paramMap[a]) + '&';
    }

    Ti.API.debug(body);

    xhr.open(args.method, body);
    var authString = Base64.encode(that.applicationId + ':' + that.masterKey);
    xhr.setRequestHeader('Authorization', 'Basic ' + authString);
    xhr.setRequestHeader('Content-Type', 'application/json');
    xhr.send();
    }

    };

    /*
    * Create a Parse object. Argument hash:
    *
    * className: string name of the Parse class
    * object: The object to save
    * success: function to call on success
    * error: function to call on error
    *
    */
    Client.prototype.create = function(args) {
    this.request({
    url : args.className,
    method : 'POST',
    payload : args.object,
    success : args.success,
    error : args.error
    });
    };

    /*
    * Get a Parse object. Argument hash:
    *
    * className: string name of the Parse class
    * objectId: The object ID of the object you're getting
    * success: function to call on success
    * error: function to call on error
    *
    */
    Client.prototype.get = function(args) {
    this.request({
    url : args.className + (args.objectId ? '/' + args.objectId : ''),
    method : 'GET',
    payload : args.payload, //< --- NEW
    success : function(response) {
    args.success(response);
    },
    error : args.error
    });
    };

    /*
    * Update a Parse object. Argument hash:
    *
    * className: string name of the Parse class
    * objectId: The object ID of the object you're getting
    * object: the fields on the object you would like to update
    * success: function to call on success
    * error: function to call on error
    *
    */
    Client.prototype.update = function(args) {
    this.request({
    url : args.className + '/' + args.objectId,
    method : 'PUT',
    payload : args.object,
    success : args.success,
    error : args.error
    });
    };

    /*
    * Delete a Parse object. Argument hash:
    *
    * className: string name of the Parse class
    * objectId: The object ID of the object you're deleting
    * success: function to call on success
    * error: function to call on error
    *
    */
    Client.prototype.remove = function(args) {
    this.request({
    url : args.className + '/' + args.objectId,
    method : 'DELETE',
    success : args.success,
    error : args.error
    });
    };

    //a non-jacked base 64 encode implementation
    var Base64 = {
    // private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode : function(input) {
    var output = "";
    var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
    var i = 0;

    input = Base64._utf8_encode(input);

    while(i < input.length) {

    chr1 = input.charCodeAt(i++);
    chr2 = input.charCodeAt(i++);
    chr3 = input.charCodeAt(i++);

    enc1 = chr1 >> 2;
    enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
    enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
    enc4 = chr3 & 63;

    if(isNaN(chr2)) {
    enc3 = enc4 = 64;
    } else if(isNaN(chr3)) {
    enc4 = 64;
    }

    output = output + Base64._keyStr.charAt(enc1) + Base64._keyStr.charAt(enc2) + Base64._keyStr.charAt(enc3) + Base64._keyStr.charAt(enc4);

    }

    return output;
    },

    // public method for decoding
    decode : function(input) {
    var output = "";
    var chr1, chr2, chr3;
    var enc1, enc2, enc3, enc4;
    var i = 0;

    input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

    while(i < input.length) {

    enc1 = Base64._keyStr.indexOf(input.charAt(i++));
    enc2 = Base64._keyStr.indexOf(input.charAt(i++));
    enc3 = Base64._keyStr.indexOf(input.charAt(i++));
    enc4 = Base64._keyStr.indexOf(input.charAt(i++));

    chr1 = (enc1 << 2) | (enc2 >> 4);
    chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
    chr3 = ((enc3 & 3) << 6) | enc4;

    output = output + String.fromCharCode(chr1);

    if(enc3 != 64) {
    output = output + String.fromCharCode(chr2);
    }
    if(enc4 != 64) {
    output = output + String.fromCharCode(chr3);
    }

    }

    output = Base64._utf8_decode(output);

    return output;

    },

    // private method for UTF-8 encoding
    _utf8_encode : function(string) {
    string = string.replace(/\r\n/g, "\n");
    var utftext = "";

    for(var n = 0; n < string.length; n++) {

    var c = string.charCodeAt(n);

    if(c < 128) {
    utftext += String.fromCharCode(c);
    } else if((c > 127) && (c < 2048)) {
    utftext += String.fromCharCode((c >> 6) | 192);
    utftext += String.fromCharCode((c & 63) | 128);
    } else {
    utftext += String.fromCharCode((c >> 12) | 224);
    utftext += String.fromCharCode(((c >> 6) & 63) | 128);
    utftext += String.fromCharCode((c & 63) | 128);
    }

    }

    return utftext;
    },

    // private method for UTF-8 decoding
    _utf8_decode : function(utftext) {
    var string = "";
    var i = 0;
    var c = c1 = c2 = 0;

    while(i < utftext.length) {

    c = utftext.charCodeAt(i);

    if(c < 128) {
    string += String.fromCharCode(c);
    i++;
    } else if((c > 191) && (c < 224)) {
    c2 = utftext.charCodeAt(i + 1);
    string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
    i += 2;
    } else {
    c2 = utftext.charCodeAt(i + 1);
    c3 = utftext.charCodeAt(i + 2);
    string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
    i += 3;
    }

    }
    return string;
    }
    };