I have a third-party API that returns a JSON response when fetching an image file. The response has a key named content. This key contains the binary data of the image asked for.
I get this response using cURL in PHP, then json_decode the response.
I get the content key, get the contents out of that and save it in a variable.
Then, I pass this string to imagecreatefromstring but it always returns false.
What's wrong here? How can I convert that binary data into an image resource?
If anyone has a shortcut, ultimately, I need to store that image at a specific location on the File System.
The response that I get is here: https://gist.github.com/abhisheksoni27/2949f42eab5851ad75e77026fe53be87
<?php
$file_name = 'FILE_NAME_HERE';
$url = API_URL_HERE . $file_name;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
$response = curl_exec($ch);
$resJson = json_decode($response, true);
$image_content = $resJson["content"];
$image = imagecreatefromstring($image_content);
var_dump($image); // this is always false
I am transfering data from one linux-box to another. In generel this works fine, BUT I am having trouble when it comes to transferring images. I have tested all kinds of stuff. I hope some one may be able to help me out.
$filename = "/home/user/image.jpg";
$handle = fopen($filename, "r");
$data = fread($handle, filesize($filename));
$data = base64_encode($data);
# Transfer reading
#$arrIn['changeCharset'] = "true";
$arrIn['postFields'] = "action=test&data=$base64";
$test = curlServerPost($arrIn);
Here is my CURL-function:
function curlServerPost($arrIn)
{
$postFields = $arrIn['postFields'];
$url = "$GLOBALS[remoteSite]"; // Where you want to post data
$ch = curl_init(); // Initiate cURL
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true); // Tell cURL you want to post something
curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields); // Define what you want to post
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // Return the output in string format
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // Accepter alle certifikater, se: http://unitstep.net/blog/2009/05/05/using-curl-in-php-to-access-https-ssltls-protected-sites/
$res = curl_exec($ch); // Execute
curl_close($ch); // Close cURL handle
return($res);
}
Finally, here is the receiver (server) part
$data = $_POST[data];
$data = base64_decode($data);
$stmt = $GLOBALS[pdo]->prepare("INSERT INTO cameraImages (cameraImagesId) VALUES ('')");
$stmt->execute();
$cameraImagesId = $GLOBALS[pdo]->lastInsertId();
$stmt = $GLOBALS[pdo]->prepare("UPDATE cameraImages SET cameraImagesFile='$data' WHERE cameraImagesId='$cameraImagesId'");
$stmt->execute();
Some last remarks:
- If I don't base_decode on server-side I receive (but completely wrong format. Errors in image)
If I base_decode om server-side. Nothing is received.
I would like to don't encode/decode at all. If I do that. Only a small part of the image is stored (corrupted image)
My datafield is LONGBLOB (mysql)
PHP on server side is: PHP 5.3.3
PHP on client side is: PHP 7.0.27-0+deb9u1
I have tried all kinds of stuff. Followed all kinds of tutorials. It just won't work for me :-/
So if anyone can come up with ideas I am more than willing to test and try :)
Loooking forward to hear from you.
Succes. I just needed
urlencode($data);
And removed base64_encode($data); / base64_decode($data);
I have dropped putting images in database since many ppl don't recommend it.
I'm not allowed to use file_get_contents. Originally I got the file contents by simply doing this:
$filepath = $_FILES['resume-attachment']['tmp_name'];
$filecontent = file_get_contents($filepath);
$encodedFile = base64_encode($filecontent);
Unfortunately, it's not allowed.
$filepath = $_FILES['resume-attachment']['tmp_name'];
$filename = $_FILES['resume-attachment']['name'];
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $filepath);
$filecontent = curl_exec($ch);
curl_close($ch);
$encodedFile = base64_encode($filecontent);
The code above is my attempt at using cURL. I get the filename uploaded, so I get some reaction, but the uploaded file is 0.0 bytes of size... which is not correct. I would think that perhaps the issue could be that I shouldn't treat $filepath as a URL, but what would the alternative be? I should also mention that I'm not trying to post it from this code. I simply want to get the file contents, and then encode it. It's part of an XML string later on.
The problem is when i use file_get_contents to get source (HTML) from this site, the result that i receive is NOT a plain html code.
The code i used:
$source = file_get_contents("http://mp3.zing.vn/bai-hat/Dance-With-My-Father-Luther-Vandross/ZWZ9D6FD.html");
echo $source;
// OR print_r($source);
The source i received:
��}{�#Ǒ��-��!E��=��Mv�5�B���R�����h��E�HV7YE�������a�X��p{��[�:�!{��;,v��u��Or��̬��Y��M��ʌ̌�����������F��ޖ����ػ��S� #�~��H�7k�����ʎȦ2���M?�ު&D�����t���$u�O��N���>%(Y����I��Vb�[���VN�=�[�![*�dE*�]3:�ޑ�xiA���Z��g ��祇VejI �R�y�֨�ea��o��s�M/�... *MORE
I tried with cURL, but i also received the same result:
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://mp3.zing.vn/bai-hat/Dance-With-My-Father-Luther-Vandross/ZWZ9D6FD.html");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$source = curl_exec($ch);
curl_close($ch);
I think the source i received must have been encrypted, but if i use browser to view source, the source will NOT be encrypted.
Eventually, i dont really know what happened, and how to get the plain source (plain HTML) ?
It's gzip compressed, just set the correct encoding and you're good to go
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://mp3.zing.vn/bai-hat/Dance-With-My-Father-Luther-Vandross/ZWZ9D6FD.html");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch,CURLOPT_ENCODING , "gzip");
$source = curl_exec($ch);
curl_close($ch);
Take a look at gzdecode (requires the ZLIB PHP module, though - if you don't have it, I'd strongly consider to use JimL's method using cURL).
string gzdecode ( string $data [, int $length ] )
$source = file_get_contents("http://mp3.zing.vn/bai-hat/Dance-With-My-Father-Luther-andross/ZWZ9D6FD.html");
echo gzdecode($source);
// OR print_r($source);
I am getting a byte array from a WCF service that generated the PDF and converted it to a byte array. I need to able to get the byte array and using either PHP or Javascript (or jQuery) take that byte array and convert it back to a downloadable PDF. I would prefer a solution in Javascript, but PHP would work fine too.
The code I'm using to get the PDF is:
<?php
$userPDF = $_POST['username'];
$passPDF = $_POST['password'];
$idPDF = 'MO-N007175A';
//PDF Function
$data = array("id" => $idPDF, "username" => $userPDF, "password" => $passPDF);
$data_string = json_encode($data);
$ch = curl_init('http://********.com/******/v1/DealPdf');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_VERBOSE, 1 );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
$result = curl_exec($ch);
var_dump($result);
?>
The var_dump($result); is
string(1053285) "[37,80,68,70,45,49,46,54,10,37,211,244,204,225, ...
The array goes on for a while... so I only provided a small portion for example purposes.
Where do I start on getting a PDF out of this array?
EDIT
To clarify - The WCF Service IS returning an actual PDF, just in a byte array. I need to save this byte array as a PDF on the clients machine. I have used fwrite and so forth, but I must be missing something because I dont see it working.
Also - If I do use fwrite, where does it output the file?
EDIT
I had to do the same thing. For me, I was generating the PDF server-side, but wanted to send it down with a bunch of other data to the client in an AJAX response. Here's the JavaScript that I ended up with. The Blob and saveAs methods are rather new technologies, so you might want to (as I did) get the polyfills for each of them, linked to above.
// Convert the Base64 string back to text.
var byteString = atob(data.reportBase64Bytes);
// Convert that text into a byte array.
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
// Blob for saving.
var blob = new Blob([ia], { type: "application/pdf" });
// Tell the browser to save as report.pdf.
saveAs(blob, "report.pdf");
// Alternatively, you could redirect to the blob to open it in the browser.
//document.location.href = window.URL.createObjectURL(blob);
At first, I thought this would be a great use of the JavaScript library PDF.js, but then I realized that you wanted to download the file. The best place to do this would be in PHP setting all of the appropriate headers along the way.
However, there may be something that will work for you, but I have never tried it with PDFs. I have seen image saves done well with data url's in some browsers. A great example of this is Canvas2Image. The code would look something liket he following:
document.location.href = "data:application/pdf;base64," + base64PDFdata;
Where base64PDFdata would be your byte array converted to base 64 string representation. No guarantees on this working, but it may be worth a shot.
As mention in my comment to your question, it looks like you're getting a string representation of an array of decimal representations of bytes. e.g. "[37,80,68,70]"
You likely need to transform that.
Can be done like this:
// with:
$data = "[50,20,36,34,65]";
// remove brackets
$data = trim($data,'[]');
// split into array on ',' character
$data = explode(',',$data);
// transform each decimal value to a byte representation. chr does just that
$data = array_map('chr',$data);
// turn the resulting array back into a string
$data = implode('',$data);
The comments about setting the headers to force download are also relevant so you should use that too.
Here's the final code:
<?php
// This is good to keep
header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename="output.pdf"');
$userPDF = $_POST['username'];
$passPDF = $_POST['password'];
$idPDF = 'MO-N007175A';
//PDF Function
$result = array("id" => $idPDF, "username" => $userPDF, "password" => $passPDF);
$result_string = json_encode($result);
$ch = curl_init('http://********.com/******/v1/DealPdf');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $result_string);
curl_setopt($ch, CURLOPT_VERBOSE, 1 );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
$result = curl_exec($ch);
// remove brackets
$result = trim($result,'[]');
// split into array on ',' character
$result = explode(',',$result);
// transform each decimal value to a byte representation. chr does just that
$result = array_map('chr',$result);
// turn the resulting array back into a string
$result = implode('',$result);
echo $result;
?>
Note that echo is used here, var_dump is not good as it adds extra formatting to the output.
Also, note, you're not doing any testing on the result of the curl, if it fails you should probably handle the output differently.
Set MIME header with header() to match a PDF and then print out byte array.
Something like this:
In PHP, output as byte array and stream. Which one is better?
Ahh now I see what you want to do!
Try this:
<?php
header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename="downloaded.pdf"');
$userPDF = $_POST['username'];
$passPDF = $_POST['password'];
$idPDF = 'MO-N007175A';
//PDF Function
$data = array("id" => $idPDF, "username" => $userPDF, "password" => $passPDF);
$data_string = json_encode($data);
$ch = curl_init('http://localhost/test/file.pdf');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_VERBOSE, 1 );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
$result = curl_exec($ch);
var_dump($result);
?>