import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.Proxy;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ForkJoinPool;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.Supplier;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.wizard;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.List;

import javax.annotation.Resource;

import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

	redirectPage.append("/error/badrequest/");
	response.sendRedirect(redirectPage.toString());
} else if(!"badAuth".equals(type)) {
	redirectPage.append("/error/notfound/?url=");
	redirectPage.append(java.net.URLEncoder.encode(requestUri , "UTF-8"));
	response.sendRedirect(redirectPage.toString());
}

```
curl -u <CLIENT_ID>:<CLIENT_SECRET> -k -d "grant_type=client_credentials" -H "Content-Type:application/x-www-form-urlencoded" https://<IS_HOST>:<IS_HTTPS_PORT>/oauth2/token
```

Example:

```
curl -u PoEgXP6uVO45IsENRngDXj5Au5Ya:eKsw6z8CtOJVBtrOWvhRWL4TUCga -k -d "grant_type=client_credentials" -H "Content-Type:application/x-www-form-urlencoded" https://localhost:9443/oauth2/token
```

        if ("Content-Type".equals(parts[0], ignoreCase = true)) {
          return@let parts[1].trim()
        }
      }
      return@let null
    } ?: "application/x-www-form-urlencoded"

  return mimeType.toMediaTypeOrNull()
}

private fun isSpecialHeader(s: String): Boolean {
  return s.equals("Content-Type", ignoreCase = true)
}

fun Main.commonRun() {
  client = createClient()

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.codelibs.fess.Constants;
import org.codelibs.fess.exception.FessSystemException;
import org.codelibs.fess.unit.UnitFessTestCase;

public class FessFileTransformerTest extends UnitFessTestCase {

    private String encodeUrl(final String url) {
        try {
            return URLEncoder.encode(url, Constants.UTF_8);

	req, err := http.NewRequest(http.MethodPost, idpEndpoint, strings.NewReader(data.Encode()))
	if err != nil {
		return nil, err
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.SetBasicAuth(clientID, clientSecret)
	t := &http.Transport{
		TLSClientConfig: &tls.Config{
			InsecureSkipVerify: true,
		},
	}
	hclient := http.Client{
		Transport: t,
	}

            charset = charset,
          )
      }

      fun build(): FormBody = FormBody(names, values)
    }

  companion object {
    private val CONTENT_TYPE: MediaType = "application/x-www-form-urlencoded".toMediaType()
  }

        def fetch_credentials():
            # HTTP headers are case insensitive filter out
            # all duplicate headers and pick one.
            headers = {}
            headers['content-type'] = 'application/x-www-form-urlencoded'
            headers['authorization'] = urllib3.make_headers(
                basic_auth='%s:%s' % (self.cid, self.csec))['authorization']

            response = self._http.urlopen('POST', self.idp_ep,

                    "summary": "Login",
                    "operationId": "login_token_post",
                    "requestBody": {
                        "content": {
                            "application/x-www-form-urlencoded": {
                                "schema": {
                                    "$ref": "#/components/schemas/Body_login_token_post"
                                }
                            }