tencent cloud

import 'dart:convert';
import 'dart:io';

import 'package:tencentcloud_cos_sdk_plugin/fetch_credentials.dart';
import 'package:tencentcloud_cos_sdk_plugin/pigeon.dart';

class FetchCredentials implements IFetchCredentials{
  @override
  Future<SessionQCloudCredentials> fetchSessionCredentials() async {
    // First, obtain the response containing the key from your temporary key server, for example:
    var httpClient = HttpClient();
    try{
      // URL of the temporary key server
      var stsUrl = "http://stsservice.com/sts";
      var request = await httpClient.getUrl(Uri.parse(stsUrl));
      var response = await request.close();
      if (response.statusCode == HttpStatus.OK) {
        var json = await response.transform(utf8.decoder).join();
        print(json);

        // Then, parse the response to obtain the temporary key
        var data = jsonDecode(json);
        // Finally, return the temporary key object
        return SessionQCloudCredentials(
            secretId: data['credentials']['tmpSecretId'],// `SecretId` of the temporary key
            secretKey: data['credentials']['tmpSecretKey'],// `SecretKey` of the temporary key
            token: data['credentials']['sessionToken'],// `Token` of the temporary key
            startTime: data['startTime'],// Start timestamp (in seconds) of the effective period of the temporary key
            expiredTime: data['expiredTime']// End timestamp (in seconds) of the effective period of the temporary key
        );
      } else {
        throw ArgumentError();
      }
    } catch (exception) {
      throw ArgumentError();
    }
  }
}

Cos().initWithSessionCredential(FetchCredentials());