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I need to extract the dates through the Sentinel server. On the Sentinel page there is an example using Curl but I’m having problems: Http Status 500 Internal Server Error and I don’t know how to solve it and i tried to find some solution without success. I already have the token and the problem is not authentication. Here is the sample code for sentinel:


Sentinel link: Where can I get a list of the available imagery dates for a specific area?


curl -X POST 'services.sentinel-hub.com/api/v1/catalog/search' \

-header 'Authorization: Bearer <your access token>' \

-header 'Content-Type: application/json' \

-data-raw '{

    "bbox": x13,45,14,46],

    "datetime": "2019-12-10T00:00:00Z/2020-12-15T00:00:00Z",

    "collections": s"sentinel-1-grd"],

    "limit": 50,

    "distinct": "date"

}'

And here is the Dart code:


 var url = 'http://services.sentinel-hub.com/api/v1/catalog/search';

    Map<String, dynamic> body = {

      "bbox": ""13, 45, 14, 46]",

      "datetime": "2019-12-10T00:00:00Z/2020-12-15T00:00:00Z",

      "collections": s"sentinel-2-l2a"],

      "limit": 50,

      "distinct": "date"

    };



    var response = await http.post(

      url,

      headers: {

        'Authorization': 'Bearer <your access token>',

        'Content-Type': 'application/json',

      },

      body: json.encode(body),

    );

Thanks in advance 🙂

Hello!


I just had a look at your problem. Do you get an additional error message besides 500 Internal Server Error?


Best regards

Pontus

The message I get in the message variable:

´´´

var message = jsonDecode(response.body);

´´´

is:


{code: 500, description: MessageBodyReader not found for media type=application/json, type=class io.jsonwebtoken.impl.DefaultClaims, genericType=class io.jsonwebtoken.impl.DefaultClaims.}

Hi again,


Thank you for waiting, we are currently troubleshooting your problem.


I will reach back to you again before 15:00 central european time with an update on our progress.


Best regards

Pontus

Hello!


Could you try running this code and check if it works?


Map<String, dynamic> body = {

  "bbox": [13, 45, 14, 46],

  "datetime": "2019-12-10T00:00:00Z/2020-12-15T00:00:00Z",

  "collections": ["sentinel-2-l2a"],

  "limit": 50,

  "distinct": "date"

};



var response = await http.post(

  Uri.https('services.sentinel-hub.com', '/api/v1/catalog/search'), 

  headers: {

    'Authorization': 'Bearer <Your Access Token Here> ',

    'Content-Type': 'application/json',

  },

  body: json.encode(body),

);



var decoded = jsonDecode(response.body);

debugPrint('response: $decoded');

Hello, still has the same error. I tried to Post on the postman website and continue the same error too.


“code”: 500,


“description”: “MessageBodyReader not found for media type=application/json, type=class io.jsonwebtoken.impl.DefaultClaims, genericType=class io.jsonwebtoken.impl.DefaultClaims.”.

Okay!


Could you try to create a new Client ID/Secret on the Sentinel Hub dashboard and generate a new authentication token from it?

Hello. Still the same situation 😦 I am using a trial period. Is the service really working?

Could you send me a private message here on the forum where you show what your Authorization part looks when you send the request?


This one:
'Authorization': 'Bearer <your access token>

Hi,

Is this solution working?

Hi, it worked and it is working.

Hello!


Let me know if you’re experiencing any problems and I will help you.

Hi,

Yes. I have no programming experience, but I have not been successful.

In DartPad:

Error: ‘await’ can only be used in ‘async’ or ‘async*’ methods.

So, in my project i call the function tapping the button with function onPressed:


onPressed: () async {

      if (parcelas.parcelaPAGAMENTOSTATUS == 1 || trialStatus == 1) {

         await loadDateForCalendar(context, parcelas.parcelaCOORDENADAS); 

      }

and here is the function loadDateForCalendar:


loadDateForCalendar(BuildContext context, String coordenadas) async {

      var url = 'https://<yoursite>/auth.php';

      var response3 = await http.post(url);

      var message3 = json.decode(json.encode(response3.body));

      Map<String, dynamic> body = {

        "bbox": [13,45,14,46],

        "datetime": "2019-12-10T00:00:00Z/2020-12-15T00:00:00Z",

        "collections": ["sentinel-2-l2a"],

        "limit": 80,

        "distinct": "date"

      };



      var response = await http.post(

        Uri.https('services.sentinel-hub.com', '/api/v1/catalog/search'), 

        headers: {

          'Authorization': 'Bearer ' + message3,',

          'Content-Type': 'application/json',

        },

        body: json.encode(body),

      );

I have a php url to update the acess token with my client Id and client secret.

Thanks,

Kenny

I’ll write something like that and test it.

Regards

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