PHP Curl File Upload sends Empty Upload

Question

I'm trying to convert the following CURL:

curl -X POST \
  -H "Content-Type: image/jpeg" \
  --data-binary '@myPicture.jpg' \
  https://api.parse.com/1/files/pic.jpg

To PHP:

$ch = curl_init();
$data = array('myPicture.jpg' => "@myPicture.jpg");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt ($ch, CURLOPT_POSTFIELDS, $data);

$headers = array();
$headers[] = "Content-Type: image/jpeg";
curl_setopt ($ch, CURLOPT_HTTPHEADER, $headers);

curl_setopt ($ch, CURLOPT_URL, 'https://api.parse.com/1/files/myPicture.jpg');

curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt ($ch, CURLOPT_VERBOSE, true);

$response = curl_exec($ch);
curl_close($ch);

But my response is false. Here is what I get from print_r(curl_getinfo($ch), true):

Array
(
    [url] => https://api.parse.com/1/files/myPicture.jpg
    [content_type] => 
    [http_code] => 0
    [header_size] => 0
    [request_size] => 0
    [filetime] => -1
    [ssl_verify_result] => 20
    [redirect_count] => 0
    [total_time] => 0.28
    [namelookup_time] => 0.187
    [connect_time] => 0.218
    [pretransfer_time] => 0.28
    [size_upload] => 0
    [size_download] => 0
    [speed_download] => 0
    [speed_upload] => 0
    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0
    [redirect_time] => 0
)

Any ideas as to why this isnt working? Thanks!

Do you have the image in the same folder as the php file ? because you specify @myPicture.jpg. Also try with absolute path of the file. — Subir Kumar Sao
– Subir Kumar Sao, Commented Jun 19, 2012 at 4:26
For a content-type of jpg, you should actually be having, IMO, $data=file_get_contents("myPicture.jpg"); — UltraInstinct
– UltraInstinct, Commented Jun 19, 2012 at 4:36
WOOHOO THAT WORKED!!! Want to add your answer so I can check it? — Garrett
– Garrett, Commented Jun 19, 2012 at 5:41

Ja͢ck · Accepted Answer · 2012-06-21 03:00:25Z

12

The ssl_verify_result has the value of 20, which means, according to the documentation:

unable to get local issuer certificate

the issuer certificate of a locally looked up certificate could not be found. This normally means the list of trusted certificates is not complete.

You can try without verifying the peer first:

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

If that works, you will have to specify the path of a recent CA bundle. See also: http://curl.haxx.se/docs/sslcerts.html

You should also check whether the file you're trying to upload is in the expected folder. If you specify CURLOPT_VERBOSE = 1 it should warn you about this as well.

Update

After checking the API documentation, the service doesn't expect a regular file upload (i.e. "multipart/form-data"); rather, a raw upload is required.

This can be accomplished by:

curl_setopt($ch, CURLOPT_POSTFIELDS, file_get_contents('myPicture.jpg'));
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: image/jpeg"));

Update 2 Passing anything using CURLOPT_POSTFIELDS will implicitly set the request method to POST and Content-Type to application/x-www-form-urlencoded. When you pass an array, the values may start with @ to indicate a file upload (doing so should also implicitly change the Content-Type to multipart/form-data).

The command line curl allows the @ in a few places:

using --data-binary to specify a file containing raw binary data
using --data or --data-ascii to specify a file containing url-encoded data
using --F or --form

The latter behaves the same as passing an array to CURLOPT_POSTFIELDS and using the @ prefix. The other two behave the same as passing a string.

edited Jun 21, 2012 at 3:00

answered Jun 19, 2012 at 4:31

Ja͢ck

174k39 gold badges269 silver badges316 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Garrett Over a year ago

Updated with those options and still didn't work. @Thrustmaster's answer worked =S

Ja͢ck Over a year ago

@Garrett I see, the response seemed to suggest an SSL issue; in any case, I've updated my answer after checking the API documentation

dispake Over a year ago

Is that what the @ in the cURL means? Raw data? I guess I'm trying to understand how the cmd line cURL is Interpreted. Based on the solution, I'm assuming that means the receiving URL some how expects only a single parameter .. with no key name either? Seems odd. I ran into the same issue as Garrett and thought the params needed to be k/v paired in the same @ fashion as the cmd line cURL.

Naderio Over a year ago

Had a similar problem (ssl_verify_result = 20) and it could be solved by the CURLOPT_SSL_VERIFYPEER option. Thank you!!

Collectives™ on Stack Overflow

PHP Curl File Upload sends Empty Upload

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related