MapMatching, Unable to process JSON

Developers
1

For the first time I try to feed the MapMatching API with a GPX-file, but the only message I get in return is: Unable to process JSON. Can anyone tell me what I do wrong.

php-code:

<?php $file = "test.gpx"; $fp = fopen($file, "r"); $data = file_get_contents($file); $query = array( "gps_accuracy" => "0", "profile" => "car", "locale" => "nl", "elevation" => "false", "details" => "string", "instructions" => "true", "calc_points" => "true", "points_encoded" => "true", "key" => "[my_key]", "data" => $data, ); $curl = curl_init(); curl_setopt_array($curl, array ( CURLOPT_HTTPHEADER => array('Content-Type: application/application/gpx+xml'), CURLOPT_URL => "https://graphhopper.com/api/1/match?" . http_build_query($query), CURLOPT_RETURNTRANSFER => true, CURLOPT_CUSTOMREQUEST => "POST", CURLOPT_POSTFIELDS => $query, CURLOPT_INFILE => $fp, )); $response = curl_exec($curl); $error = curl_error($curl); curl_close($curl); if ($error) { echo "cURL Error #:" . $error; } else { echo json_encode($response); } ?>

test.gpx:


Test

<gpxx:TrackExtension xmlns:gpxx=“http://www.garmin.com/xmlschemas/GpxExtensions/v3”>
gpxx:DisplayColorRed</gpxx:DisplayColor>
</gpxx:TrackExtension>












2

The php-code and GPX-file again, but now preformatted

<?php
$file = "test.gpx";
$fp   = fopen($file, "r");
$data = file_get_contents($file);

$query = array(
  "gps_accuracy" => "0",
  "profile" => "car",
  "locale" => "nl",
  "elevation" => "false",
  "details" => "string",
  "instructions" => "true",
  "calc_points" => "true",
  "points_encoded" => "true",
  "key" => "[my_key]",
  "data" => $data,
);

$curl = curl_init();


curl_setopt_array($curl, array (
	CURLOPT_HTTPHEADER => array('Content-Type: application/application/gpx+xml'),
	CURLOPT_URL => "https://graphhopper.com/api/1/match?" . http_build_query($query),
	CURLOPT_RETURNTRANSFER => true,
	CURLOPT_CUSTOMREQUEST => "POST",
	CURLOPT_POSTFIELDS => $query,
	CURLOPT_INFILE => $fp,
));

$response = curl_exec($curl);
$error = curl_error($curl);

curl_close($curl);

if ($error) {
  echo "cURL Error #:" . $error;
} else {
	echo json_encode($response);
}
?>
Test Red ``` type or paste code here ```
3

The Content-Type header looks odd. Shouldn’t it be application/gpx+xml instead of application/applicaition/gpx+xml?

4

Easbar, thanks for youtr reaction. But changing application/applicaition/gpx+xml in application/gpx+xml didn’t make a difference. Any other suggestion?

5

Were you able to run one of the examples from the docs? It’s hard to tell what the problem is from the information you provided, but I also don’t know much about PHP.

6

I ran an example from the docs. It worked well. Do you know more about Javascript? I also tried it with Javascript/Ajax, but then I get the error: Sequence is broken for submitted track at initial time step.

<script src="jquery-3.3.1.min.js"></script>
<script>

function sendGpx(gpx)
{
	$.ajax(
	{
		url: 'https://graphhopper.com/api/1/match?gps_accuracy=0&profile=car&locale=nl&elevation=false&details=string&instructions=true&calc_points=true&points_encoded=true&key=[my_key]&data=' + gpx,
		type: 'POST',
		data: gpx,
		contentType: 'application/gpx+xml',
		headers: { 'Content-Type': 'application/gpx+xml' }
	});	
}
</script>

<?php
$file = "test.gpx";
$fp   = fopen($file, "r");
$data = file_get_contents($file);
?>
<script>
var gpx = '<?php echo $data;?>';
sendGpx(gpx);
</script>