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182 lines
5.8 KiB
Java
182 lines
5.8 KiB
Java
package com.todoroo.astrid.producteev.api;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import org.apache.http.HttpEntity;
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import org.apache.http.HttpResponse;
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import org.apache.http.client.HttpClient;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.client.methods.HttpPost;
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import org.apache.http.impl.client.DefaultHttpClient;
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import org.apache.http.params.BasicHttpParams;
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import org.apache.http.params.HttpConnectionParams;
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import org.apache.http.params.HttpParams;
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import org.json.JSONObject;
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import com.todoroo.andlib.service.RestClient;
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import com.todoroo.astrid.utility.Constants;
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/**
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* RestClient allows Android to consume web requests.
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* <p>
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* Portions by Praeda:
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* http://senior.ceng.metu.edu.tr/2009/praeda/2009/01/11/a-simple
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* -restful-client-at-android/
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*
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* @author Tim Su <tim@todoroo.com>
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*
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*/
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public class ProducteevRestClient implements RestClient {
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private static final int HTTP_OK = 200;
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private static final int TIMEOUT_MILLIS = 30000;
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private static HttpClient httpClient = null;
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private static String convertStreamToString(InputStream is) {
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/*
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* To convert the InputStream to String we use the
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* BufferedReader.readLine() method. We iterate until the BufferedReader
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* return null which means there's no more data to read. Each line will
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* appended to a StringBuilder and returned as String.
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*/
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BufferedReader reader = new BufferedReader(new InputStreamReader(is), 16384);
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StringBuilder sb = new StringBuilder();
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String line = null;
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try {
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while ((line = reader.readLine()) != null) {
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sb.append(line + "\n"); //$NON-NLS-1$
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}
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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try {
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is.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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return sb.toString();
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}
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private synchronized static void initializeHttpClient() {
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if (httpClient == null) {
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HttpParams params = new BasicHttpParams();
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HttpConnectionParams.setConnectionTimeout(params, TIMEOUT_MILLIS);
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HttpConnectionParams.setSoTimeout(params, TIMEOUT_MILLIS);
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httpClient = new DefaultHttpClient(params);
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}
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}
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private String processHttpResponse(HttpResponse response) throws IOException, ApiServiceException {
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HttpEntity entity = response.getEntity();
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String body = null;
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if (entity != null) {
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InputStream contentStream = entity.getContent();
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try {
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body = convertStreamToString(contentStream);
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} finally {
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contentStream.close();
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}
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}
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if(Constants.DEBUG)
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System.err.println(body);
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int statusCode = response.getStatusLine().getStatusCode();
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if(statusCode != HTTP_OK || (body != null && body.startsWith("{\"error\":"))) { //$NON-NLS-1$
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ApiServiceException error;
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try {
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JSONObject errorObject = new JSONObject(body).getJSONObject("error"); //$NON-NLS-1$
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String errorMessage = errorObject.getString("message"); //$NON-NLS-1$
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if(statusCode == 403)
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error = new ApiSignatureException(errorMessage);
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else if(statusCode == 401)
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error = new ApiAuthenticationException(errorMessage);
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else
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error = new ApiServiceException(errorMessage);
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} catch (Exception e) {
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if(statusCode == 401)
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error = new ApiAuthenticationException(response.getStatusLine().getReasonPhrase());
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else
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error = new ApiServiceException(response.getStatusLine() +
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"\n" + body); //$NON-NLS-1$
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}
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throw error;
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}
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return body;
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}
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/**
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* Issue an HTTP GET for the given URL, return the response
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*
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* @param url url with url-encoded params
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* @return response, or null if there was no response
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* @throws IOException
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*/
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public synchronized String get(String url) throws IOException {
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initializeHttpClient();
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if(Constants.DEBUG)
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System.err.println("GET: " + url); //$NON-NLS-1$ // (debug)
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try {
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HttpGet httpGet = new HttpGet(url);
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HttpResponse response = httpClient.execute(httpGet);
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return processHttpResponse(response);
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} catch (IOException e) {
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throw e;
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} catch (Exception e) {
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IOException ioException = new IOException(e.getMessage());
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ioException.initCause(e);
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throw ioException;
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}
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}
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/**
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* Issue an HTTP POST for the given URL, return the response
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*
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* @param url
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* @param data
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* url-encoded data
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* @throws IOException
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*/
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public synchronized String post(String url, HttpEntity data) throws IOException {
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initializeHttpClient();
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if(Constants.DEBUG)
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System.err.println("POST: " + url); //$NON-NLS-1$ // (debug)
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try {
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HttpPost httpPost = new HttpPost(url);
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httpPost.setEntity(data);
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HttpResponse response = httpClient.execute(httpPost);
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return processHttpResponse(response);
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} catch (IOException e) {
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throw e;
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} catch (Exception e) {
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IOException ioException = new IOException(e.getMessage());
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ioException.initCause(e);
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throw ioException;
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}
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}
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/**
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* Destroy and re-create http client
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*/
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public void reset() {
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httpClient = null;
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}
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}
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