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