PC World Komputer 2010 April/PCWorld0410.iso/pluginy Firefox/8174/8174.xpi/chrome/antbar.jar/content/grabber/queryobserver.js

JavaScript | 2009-12-30 | 5.5 KB | 185 lines

//
//  queryobserver.js
//  firefox
//
//  Created by Zak on 2008-06-09.
//  Copyright 2008-2009 Ant.com. All rights reserved.
//

/**
 * Class: Observer called when firefox download something
 * @constructor     No parameters
 */
var AntQueryObserver = function ()
{
    this.unvalidContentTypes = {
        "application/x-shockwave-flash":1,
    };

    this.possibleContentTypes = {
        "flv-application/octet-stream":1,
        "application/octet-stream":1,
        "text/plain":1,
        "text/html":1
    };


    this.isValidContentLength = function (cl)
    {
        if (isNaN(cl) || cl < 500000)
            return false;
        return true;
    };


    this.regValidContentType = /video/,

    this.isValidContentType = function (ct)
    {
        if (ct.match(this.regValidContentType))
            return true;
        return false;
    };

    /**
     * Is this URL a junk URL ? From a ads for exemple
     * @param url           The URL to check
     * @return boolean
     */
    this.regForceNoJunk = /advert[0-9]*\.pornhub\.com/,
    this.regJunk = /ads|advert|banner|doubleclick|visiblemeasures\.com|video-stats\.video\.google\.com|noflv|(info|widget)\.break\.com|diggthis/,

    this.isJunkFlv = function (request)
    {
        if (this.unvalidContentTypes[request.contentType])
            return true;

        if (request.name.match(this.regForceNoJunk))
            return false;

        if (request.name.match(this.regJunk))
            return true;

        return false;
    };

    /**
     * Is this URL a valid URL ? Assuming the content type as been checked first
     * @param url           The URL to check
     * @return boolean
     */
    this.regValidFlv = /flv|video|movie|film|clip|f4v|vod|mp4/,

    this.isValidFlv = function (url)
    {
        return url.match(this.regValidFlv);
    };

    /**
     * Is this URL the result of a seek in a player ?
     * @param url           The URL to check
     * @return boolean
     */
    // &fs=XXX => seek dailymotion
    this.regSeekUrl = /[?&](st(art)?|begin|fs)=([1-9][0-9]*|0+[1-9]+)/i,

    this.isSeekUrl = function (url)
    {
        return url.match(this.regSeekUrl);
    };

    /**
     * Check if the given request is a valid flv file
     * @param request       The request object to authentify
     * @return boolean      True if the request is for a valid flv file, false instead
     */
    this.isFlv = function (request)
    {
        if (this.isSeekUrl(request.name))
        {
            AntLib.toLog(request.name + " Rejected => Seek URL");
            return false;
        }

        if (this.isJunkFlv(request))
    {
            AntLib.toLog(request.name + " Rejected => Junk");
        return false;
    }

        if (this.isValidContentType(request.contentType))
        {
            AntLib.toLog(request.name + " Accepted => True Content & noJunk");
            return true;
        }
        if (this.isValidContentLength(request.contentLength) &&
            this.possibleContentTypes[request.contentType])
        {
            AntLib.toLog(request.name + " Accepted =>  validContentLength & possibleContentType & noJunk");
            return true;
        }

        AntLib.toLog("Rejected => " + " url:" + request.name + " content-type:" + request.contentType);
        return false;
    };

    this.getDocumentByRequest = function (request)
    {
        if (request.notificationCallbacks)
        {
            if (!(request.notificationCallbacks instanceof Components.interfaces.nsIDocShell))
                return null;
            try {
                var interfaceRequestor = AntLib.QI(request.notificationCallbacks, AntLib.CI("nsIInterfaceRequestor"));
                var win = AntLib.GI(interfaceRequestor, AntLib.CI("nsIDOMWindow"));
                var currentDoc = win.document;
                var rootDoc = currentDoc;

                while (rootDoc.defaultView.frameElement)
                    rootDoc = rootDoc.defaultView.frameElement.ownerDocument;

                return rootDoc;
            }
            catch (err) {
                return null;
            }
        }
        return null;
    };

    /**
     * The function called by firefox, entry point of this class
     * @param request       The object containing the request params
     * @param topic         The specific event that trigger the function
     * @param data          the request data (seems to be empty)
     */
    this.observe = function (request, topic, data)
    {
        var request = request.QueryInterface(Components.interfaces["nsIHttpChannel"]);
        var doc = this.getDocumentByRequest(request);
//        AntLib.toLog("Request.name = " + request.name + " do isNULL = " + (doc == null));

        if (doc == null)
            return;

        if (this.isFlv(request))
        {
            var name = AntLib.safeGet(doc, "title");
            AntLib.toLog("FLV NAME: " + name);

            // FIXME: add score
            var flvLink = new AntFlvLink({origin: AntLib.getSiteName(doc.location),
                                          url: request.name,
                                          name: name,
                                          doc: doc,
                                          type: request.contentType,
                                          length: request.contentLength,
                                          charset: request.contentCharset,
                                          size: request.contentLength});

            AntGrabber.foundFlvLink(flvLink);
        }
    };
}