Sending raw binary and data with cURL

Question

I'm trying to send in POST a raw binary file together with some other data using cURL. Basically, I did that:

//Here i create the CURLFile
$cfile = new CURLFile($fullpath,'application/xml', $filename); 

//Data to upload (including the file)
$data_upload = array('username' => $username, 
                     'password' => $password, 
                     'owner' => $owner, 
                     'destination' => $pathpda, 
                     'filename' => $filename, 
                     'filedata' => $cfile);
//Upload
$ch_upload = curl_init($urlws.$e_upload);
curl_setopt($ch_upload, CURLOPT_POST,true);
curl_setopt($ch_upload, CURLOPT_POSTFIELDS, $data_upload);
curl_setopt($ch_upload, CURLOPT_RETURNTRANSFER, true);
$response_upload = curl_exec($ch_upload);
curl_close($ch_upload);

Everything worked fine. Except that now I want my file to be just binary data and not a real file on disk. Also, I need to send the other data in the request! Does anyone knows how to do that? I looked up in Google but I wasn't able to find a way to do both, sending the raw binary file and the other data. Thanks!

UPDATE To further clarify my question, I don't need to just send random binary data, rather a file whose content comes from ob_get_contents() (for example) so it's not a a physical file on disk. If i just replace the CURLfile to send the binary file data with the "filedata" variable, it simply doesn't work. The web service doesn't recognize the file. Maybe there's a way to create a CURLfile without pointing to a real file.

your question is how to send data that is not real file on disc? — fico7489
– fico7489, Commented Nov 2, 2015 at 17:45
My question is how to send a FILE that has not been saved on the server disk, (eg. a file retrieved from a database or the output of ob_get_contents()) together with other usual post data using cURL. — greg
– greg, Commented Nov 4, 2015 at 11:14
By definition of the word FILE it is stored on a disk in a folder, otherwise it is just content. File and filesystems are just paradigms on how data is stored, you just want to send the content which is nothing different than sending a username string. — Niki van Stein
– Niki van Stein, Commented Nov 4, 2015 at 11:56

Niki van Stein · Accepted Answer · 2015-11-03 12:36:30Z

0

Exactly the same way as you do with other variables. In the end everything is send as "binary", or actually in string representation.

So just do

$content = ob_get_contents();
//or file_get_contents() or whatever source
$data_upload = array('username' => $username, 
                 'password' => $password, 
                 'owner' => $owner, 
                 'destination' => $pathpda, 
                 'filename' => $filename, 
                 'filedata' => $cfile,
                 'allkindsofdata' => $content );

answered Nov 3, 2015 at 12:36

Niki van Stein

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3 Comments

greg Over a year ago

Thanks for the reply but it just doesn't work. What I'm trying to send is a file, not just binary content. The web service keeps answering "Required request part 'filedata' is not present". I also tried to manually add the header "Content-Type:multipart/form-data" and setting the options CURLOPT_HEADER, CURLOPT_HTTPHEADER, CURLOPT_INFILESIZE with no results. In my first implementation I created a CURLfile. It would be great if I could create the same CURLfile using the output of ob_get_contents() instead of referring to a real file on disk. But I don't think it can be done this way.

Niki van Stein Over a year ago

But what do you define as a file, you said the content might come from a file but you do not want to send it as a file right? So basically what you try to do is store a file in a variable and send it? (no?), I suggest you do not send filename and filedata but just the content as a normal POST variable.

greg Over a year ago

Ok lets make it simple. I need to send to a web service the data in the $data_upload variable. If I replace the CURLfile with the ob_get_contents() output, the webservice answers with an exception 400,"error":"Bad Request" "Required request part 'filedata' is not present.". Maybe I need to add an option to the curl_setopt which I don't know. I need help with that. The solution that you proposed unfortunately doesn't work.

Community · Accepted Answer · 2017-05-23 11:45:43Z

0

The trick is to make your binary string into a stream in memory and then tell curl to upload that stream, using: CURLOPT_INFILE, CURLOPT_INFILESIZE and CURLOPT_UPLOAD. This answer provides the code to do it.

edited May 23, 2017 at 11:45

CommunityBot

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answered Dec 11, 2015 at 13:15

gbe

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