Problem with addPostData

[Anonymous]

Hi,
I have a problem with POST data to some urls that when run $crawler->go, the report object is like :
[links_followed] => 1
[files_received] => 0
[bytes_received] => 0
...
The site is asp and make some requests with ajax that in every request some form data such as __VIEWSTATE, __STATEVALIDATION ,etc must send to retrieve the next page.
The code is:

////////////////////////////////////////////////////////////////////

public function start($multiProcessMode =             PHPCrawlerMultiProcessModes::MPMODE_PARENT_EXECUTES_USERCODE){
    if(PHP_SAPI == 'cli'){
        $this-    >goMultiProcessed(getConfig('crawlerMultiProcessCount'), $multiProcessMode);
    }else{
        $this->go();
    }
}

////////////////////////////////////////////////////////////////////////////

    protected  function _init(){
        $this->crawler->setURL($this->url);
        $this->crawler->setStreamTimeout(15); // defaults to 2 seconds
        $this->crawler->setConnectionTimeout(20); // defaults to 5 seconds
        $this->crawler->enableCookieHandling(true);
        //This rules lets the crawler receive the content/source of pages with the Content-Type "text/html"
        //Other pages or files with different content-types (e.g. "image/gif") won't be received
        $this->crawler->addContentTypeReceiveRule("#text/html#");
        $this->crawler->addURLFilterRule("#\.(jpg|jpeg|gif|png)$# i");
        $this->crawler->addURLFilterRule("#\.(css|js)$# i");
        $this->__setProxyAndAgent();
}

////////////////////////////////////////////////////////////////////////////

    $this->url = 'http://fa.journals.sid.ir/AdvanceJournal.aspx';
    setConfig('useAgents', true);
    $crawlingTryAgainCount = getConfig('crawlingTryAgainCount'); // for example is 3
    do{
        $this->_init();
        $this->crawler->addURLFollowRule("#!NOTHING!#");
        $this->crawler->start();
        $report = $this->_logCrawlerSummaryReport();
    }while($report->links_followed != $report->files_received && $crawlingTryAgainCount-- != 0);
    $regex = [
        'hiddenInputs' => '<input.*?type="hidden".*?name="(.*?)".*?value="(.*?)".*?>',
    ];
    preg_match_all($regex['hiddenInputs'], $this->crawler->plainContent, $hiddenInputsMatch);
    $postData = array_combine($hiddenInputsMatch[1], $hiddenInputsMatch[2]);
    $postData = array_merge($postData, [
        'ctl00$ContentPlaceHolder1$ScriptManager1' => 'ctl00$ContentPlaceHolder1$UpdatePanel1|ctl00$ContentPlaceHolder1$Timer1',
        '__ASYNCPOST' => 'true',
    ]);
    $this->crawler->plainContent = '';
    $crawlingTryAgainCount = getConfig('crawlingTryAgainCount');
    do{
        $this->crawler->addPostData("#{$this->url}#", $postData);
        $this->crawler->setFollowMode(1);
        $this->crawler->setFollowRedirects(TRUE);
        $this->crawler->setTrafficLimit(1000 * 1024);
        $this->crawler->start();
        $report = $this->_logCrawlerSummaryReport();
        debug($report);
    }while($report->links_followed != $report->files_received && $crawlingTryAgainCount-- != 0);

    debug($this->crawler->plainContent, 1);

///////////////////////////////////////////////////////////////////////////////////

$this->crawler->plainContent is a variable that store $pageInfo->source.
In this code in every two steps i use one crawler object.

but in the last line of code (debug($this->crawler->plainContent, 1);) the plain content is empty.
Can anyone please help me ?
Thank you.

[Anonymous]

[Anonymous]

help