lh.api.showcase.client.HttpErrorUtils.java Source code

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Here is the source code for lh.api.showcase.client.HttpErrorUtils.java

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/*
 * Copyright 2015 Loic Merckel
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package lh.api.showcase.client;

import com.google.gwt.json.client.JSONBoolean;
import com.google.gwt.json.client.JSONNumber;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;

import lh.api.showcase.client.UiUtils.MessageType;
import lh.api.showcase.shared.api.lh.HttpErrorResponseException;

public class HttpErrorUtils {

    private HttpErrorUtils() {
        super();
        throw new IllegalStateException();
    }

    public static void handleHttpErrorException(Throwable err, BasicFormResultDisplay display) {
        if (err == null) {
            return;
        }
        if (err instanceof HttpErrorResponseException) {
            HttpErrorResponseException httpError = (HttpErrorResponseException) err;
            StringBuilder sb = new StringBuilder();
            if (httpError.getStatusCode() <= 299) {
                return;
            } else if (httpError.getStatusCode() == 400 || httpError.getStatusCode() == 404
                    || httpError.getStatusCode() == 405) {
                sb.append(Messages.Util.INSTANCE.get().badRequest());
            } else if (httpError.getStatusCode() == 403) {
                sb.append(Messages.Util.INSTANCE.get().serverProblem());
            } else {
                String body = httpError.getResponseBody();
                if (body == null || body.isEmpty()) {
                    sb.append(err.getMessage());
                } else {
                    try {
                        JSONValue jsv = JSONParser.parseStrict(body);
                        JSONObject jobj = jsv.isObject();

                        JSONObject jsProcessingErrorsObj = jobj.get("ProcessingErrors").isObject();
                        JSONObject jsProcessingErrorObj = jsProcessingErrorsObj.get("ProcessingError").isObject();

                        @SuppressWarnings("unused")
                        JSONBoolean jsIsRetryable = jsProcessingErrorObj.get("@RetryIndicator").isBoolean();
                        @SuppressWarnings("unused")
                        JSONString jsType = jsProcessingErrorObj.get("Type").isString();
                        @SuppressWarnings("unused")
                        JSONString jsDescription = jsProcessingErrorObj.get("Description").isString();
                        @SuppressWarnings("unused")
                        JSONString jsInfoUrl = jsProcessingErrorObj.get("InfoURL").isString();
                        JSONNumber jsCode = jsProcessingErrorObj.get("Code").isNumber();

                        int code = (int) jsCode.doubleValue();
                        if (code >= 2000 && code < 3000) {
                            sb.append(Messages.Util.INSTANCE.get().badRequest());
                        }
                        if (code >= 3000 && code < 4000) {
                            sb.append(Messages.Util.INSTANCE.get().resourceNotFound());
                        } else {
                            sb.append(err.getMessage());
                        }
                    } catch (IllegalArgumentException | NullPointerException e) {
                        sb.append(err.getMessage());
                    }
                }
            }

            if (display != null) {
                display.setJson((httpError.getResponseBody() != null) ? (httpError.getResponseBody()) : (""), null);
                display.setMessage(sb.toString(), MessageType.ERROR);
            }
        }
    }
}