CURL not working from PHP but it does from command line

Question

I'm calling a URL of this kind:

http://localhost:9910/app/check?name=alvaro&test=true

Accessing through the browser URL I get the correct result. And the same when using the command line with curl, it retrieves the correct information:

C:\>curl "http://localhost:9910/boxreload/check?name=alvaro&test=true" -i
HTTP/1.1 200 OK
Content-type: application/json; charset=UTF-8
Content-length: 203
Server: Restlet-Framework/2.3.3
Accept-ranges: bytes
Date: Fri, 22 Jan 2016 18:01:30 GMT

{"restul": "true"}

But when doing it with PHP it never comes back from the curl_exec and the server times out after 30 seconds.

$stringData =  http_build_query($data);
$url = sprintf("%s?%s", $url, $stringData);

curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST,  2);

curl_setopt($curl, CURLOPT_HTTPHEADER,    array(
    'Content-Type: application/json;',
    'Content-Length: ' . strlen($stringData))
);

// $url is "'http://localhost:9910/boxreload/check?name=alvaro&test=true'"
curl_setopt($curl, CURLOPT_URL, $url );
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);

//never comes back from this call (server times out)
$curl_response = curl_exec($curl);

if(curl_response === FALSE){
    echo "error en CURL";
    echo curl_error($curl);
}
curl_close($curl);

//never reaches this point
print_r($curl_response);

Why is it? Am I doing anything wrong?

@u_mulder my point is, the server times out on curl_exec... never coming back. I don't echo anything in this example because it is not necessary for my question. — Alvaro
– Alvaro, Commented Jan 22, 2016 at 18:14
change the print_r in the last line to echo and are you sure what you're connecting to requires the client to send the 'Content-Type: application/json' and 'Content-Length: nnn' headers? Because if they're supposed to be response headers, then don't send those headers as part of the request. — Mike -- No longer here
– Mike -- No longer here, Commented Jan 22, 2016 at 18:19

Mike -- No longer here · Accepted Answer · 2016-01-22 18:27:24Z

2

As suggested, I'm turning my comment into an answer.

change the print_r in the last line to echo so that you can see the raw string output.

This code fragment:

curl_setopt($curl, CURLOPT_HTTPHEADER,    array(
'Content-Type: application/json;',
'Content-Length: ' . strlen($stringData))
);

means you're sending these headers to the server when making the request:

Content-Type: application/json
Content-Length: nnn

where nnn is an integer representing the length of $stringData.

Just make sure the proper headers are sent when making the request or you will likely receive undesired results. It is unusual to specify the content-type and content-length as headers being passed from client to server. It should be the other way around (where server sends to the client the content-type and content-length header).

answered Jan 22, 2016 at 18:27

Mike -- No longer here

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Comments

Cosmin Ordean · Accepted Answer · 2016-01-22 18:46:25Z

You forgot to do curl_init

$curl = curl_init();

and your if statement has a missing $ in front of the variable. check this code:

$data = [];

$stringData =  http_build_query($data);
$url = sprintf("%s?%s", "http://google.ro/", $stringData);

$curl = curl_init();

curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST,  2);

curl_setopt($curl, CURLOPT_HTTPHEADER,    array(
    'Content-Type: application/json;',
    'Content-Length: ' . strlen($stringData))
);

// $url is "'http://localhost:9910/boxreload/check?name=alvaro&test=true'"
curl_setopt($curl, CURLOPT_URL, $url );
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);

//never comes back from this call (server times out)
$curl_response = curl_exec($curl);

if($curl_response === FALSE){
    echo "error en CURL";
    echo curl_error($curl);
}
curl_close($curl);

//never reaches this point
print_r($curl_response);

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