com.wisedu.scc.love.widget.http.SyncRequestHandler.java Source code

Introduction

Here is the source code for com.wisedu.scc.love.widget.http.SyncRequestHandler.java

Source

/**
 * Copyright (c) 2012-2013.
 *
 * 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 com.wisedu.scc.love.widget.http;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.AbstractHttpClient;
import org.apache.http.protocol.HttpContext;

import java.io.IOException;
import java.net.UnknownHostException;

public class SyncRequestHandler {

    public static final String TAG = "SyncRequestHandler";

    private final AbstractHttpClient client;
    private final HttpContext context;
    private final StringEntityHandler entityHandler = new StringEntityHandler();

    private int executionCount = 0;
    private String charset;

    public SyncRequestHandler(AbstractHttpClient client, HttpContext context, String charset) {
        this.client = client;
        this.context = context;
        this.charset = charset;
    }

    private String makeRequestWithRetries(HttpUriRequest request) throws IOException {

        boolean retry = true;
        IOException cause = null;
        HttpRequestRetryHandler retryHandler = client.getHttpRequestRetryHandler();

        while (retry) {
            try {
                HttpResponse response = client.execute(request, context);
                return entityHandler.handleEntity(response.getEntity(), null, charset);
            } catch (UnknownHostException e) {
                cause = e;
                retry = retryHandler.retryRequest(cause, ++executionCount, context);
            } catch (IOException e) {
                cause = e;
                retry = retryHandler.retryRequest(cause, ++executionCount, context);
            } catch (NullPointerException e) {
                e.printStackTrace();
                // HttpClient 4.0.x ?bug
                // http://code.google.com/p/android/issues/detail?id=5255
                cause = new IOException("NPE in HttpClient" + e.getMessage());
                retry = retryHandler.retryRequest(cause, ++executionCount, context);
            } catch (Exception e) {
                cause = new IOException("Exception" + e.getMessage());
                retry = retryHandler.retryRequest(cause, ++executionCount, context);
            }
        }

        if (cause != null)
            throw cause;
        else
            throw new IOException("");

    }

    public String sendRequest(HttpUriRequest... params) {
        try {
            return makeRequestWithRetries(params[0]);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

}