通过 CURL 发送 ajax 请求

Question

An API request needs to be sent. For some reason, the server is blocking CURL request, but it approves an XHR ajax request. I could send an ajax request, but another problem arises - Mixed content my website is served over HTTPS but the request that needs to be sent is over HTTP so I cannot use ajax.

I am looking for a way to simulate ajax request through CURL, in some way, trick the server to believe that the CURL request is indeed an ajax request.

Here's what I have tried.

This is my CURL request.

    $ch = curl_init();
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (X11; Linux x86_64)');
        curl_setopt($ch, CURLOPT_REFERER, 'server's url');
        curl_setopt($ch, CURLOPT_AUTOREFERER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Accept:application/json, text/javascript, */*; q=0.01',
        'Accept-Encoding:gzip, deflate',
        'Accept-Language:en-US,en;q=0.9',
        'Connection:keep-alive',
        'Content-Type: application/json; charset=utf-8',
        'X-Requested-With: XMLHttpRequest',
        '__RequestVerificationToken: $token'
        ));
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_COOKIEJAR, base_path().'/cookies.txt');
        curl_setopt($ch, CURLOPT_COOKIEFILE, base_path().'/cookies.txt');
        $buffer = curl_exec($ch);
        if(curl_error($ch))
        {
        $buffer =   curl_error($ch);
        }
        curl_close($ch);

return $buffer;

This curl request is blocked

But, this ajax request goes through my localhost, but since my live website uses HTTPS I cannot really use it.

     $.ajax({
          type: "get",
          xhrFields: { withCredentials:true },
          url: http://apiendpoint.com,
          success: function(data)
          {
           // console.log(data);
          }
    })

Answer 1

in chrome, you can copy a working curl expression from developer toolbar. Try with that one from cli. If that works, you can figure out which parts are required and which parts are not. Then you can transcript it to php.

If you have doubts if the same thing happens from php than from curl, just try it with requestbin .

Answer 2

I think it is possible the header for token may not be what you think it is, since given $a==1, '$a' converts to $a, but "$a" converts to "1" (notice single quotes vs double quotes).

in your example, try replacing:

'__RequestVerificationToken: $token'

with:

"__RequestVerificationToken: $token"

and let us know if that solves the problem.

Consider using passthru("curl command here..."); using the suggestion from lintabá

Answer 3

You can use 2-stage request

1 curl .... -c ${cookie_file}

2 curl .... -b ${cookie_file} -c ${cookie_file}

This should work. first is basicly gets the cookie with session id 2nd do the real request