我正在尝试制作一个从在线服务器获取信息的 android 应用程序，并且我正在使用 httpurlconnection 但我不断收到 SSL 异常
我已经在线检查了解决方案，但我无法让它工作
这是完整的堆栈跟踪：
javax.net.ssl.SSLException: Connection closed by peer
at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:405)
at com.android.okhttp.Connection.upgradeToTls(Connection.java:146)
at com.android.okhttp.Connection.connect(Connection.java:107)
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:294)
at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:89)
at com.android.okhttp.internal.http.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:161)
at com.tritech.agric.tritechagric.ProjectUtils.makeHttpRequest(ProjectUtils.java:91)
at com.tritech.agric.tritechagric.ProjectUtils.fetchProjectData(ProjectUtils.java:35)
at com.tritech.agric.tritechagric.ProjectLoader.loadInBackground(ProjectLoader.java:31)
at com.tritech.agric.tritechagric.ProjectLoader.loadInBackground(ProjectLoader.java:10)
at android.support.v4.content.AsyncTaskLoader.onLoadInBackground(AsyncTaskLoader.java:307)
at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:60)
at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:48)
at android.support.v4.content.ModernAsyncTask$2.call(ModernAsyncTask.java:141)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
这是我的代码：
package com.tritech.agric.tritechagric;
import android.text.TextUtils;
import android.util.Log;
import org.json.JSqONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReeader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
public class ProjectUtils {
/** Tag for the log messages */
private static final String LOG_TAG = ProjectUtils.class.getSimpleName();
/**
* Query the Tritech Agric dataset and return a {@link Project} object to represent a single project.
*/
public static List<Project> fetchProjectData(String requestUrl) {
URL url = createUrl(requestUrl);
List<Project> projects = null;
try {
String jsonResponse = makeHttpRequest(url);
projects = extractFeatureFromJson(jsonResponse);
} catch (IOException e) {
e.printStackTrace();
}
return projects;
}
/**
* Returns new URL object from the given string URL.
*/
private static URL createUrl(String stringUrl) {
URL url = null;
if(stringUrl == null) {
return url;
}
try {
url = new URL(stringUrl);
} catch (MalformedURLException e) {
Log.e(LOG_TAG, "Error with creating URL ", e);
}
return url;
}
/**
* Make an HTTP request to the given URL and return a String as the response.
*/
private static String makeHttpRequest(URL url) throws IOException {
String jsonResponse = "";
// If the URL is null, then return early.
if (url == null) {
return jsonResponse;
}
HttpURLConnection urlConnection = null;
InputStream inputStream = null;
String consumerKey = "ck_f66d9606a38af1579931d1fb66eb453451aa4ea6";
String consumerSecret = "cs_37d789450fb2d4f09eaeb08ddb951c281478e43f";
String consumerKeyAndSecret = consumerKey + ":" + consumerSecret;
byte[] encodeValue = android.util.Base64.encode(consumerKeyAndSecret.getBytes(), android.util.Base64.DEFAULT);
String value = new String(encodeValue);
String basicAuthPayload = ("Basic " + value);
try {
urlConnection = (HttpURLConnection) url.openConnection();
// urlConnection.setReadTimeout(10000 /* milliseconds */);
// urlConnection.setConnectTimeout(15000 /* milliseconds */);
urlConnection.setRequestMethod("GET");
// Include the HTTP Basic Authentication payload
urlConnection.addRequestProperty("Authorization", basicAuthPayload);
urlConnection.connect();
// If the request was successful (response code 200),
// then read the input stream and parse the response.
if (urlConnection.getResponseCode() == 200) {
inputStream = urlConnection.getInputStream();
jsonResponse = readFromStream(inputStream);
} else {
Log.e(LOG_TAG, "Error response code: " + urlConnection.getResponseCode());
}
} catch (IOException e) {
Log.e(LOG_TAG, "Problem retrieving the project JSON results.", e);
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (inputStream != null) {
inputStream.close();
}
}
return jsonResponse;
}
/**
* Convert the {@link InputStream} into a String which contains the
* whole JSON response from the server.
*/
private static String readFromStream(InputStream inputStream) throws IOException {
StringBuilder output = new StringBuilder();
if (inputStream != null) {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, Charset.forName("UTF-8"));
BufferedReader reader = new BufferedReader(inputStreamReader);
String line = reader.readLine();
while (line != null) {
output.append(line);
line = reader.readLine();
}
}
return output.toString();
}
/**
* Return a {@link Project} object by parsing out information
* about the first project from the input projectJSON string.
*/
private static ArrayList<Project> extractFeatureFromJson(String projectJSON) {
// If the JSON string is empty or null, then return early.
if (TextUtils.isEmpty(projectJSON)) {
return null;
}
ArrayList<Project> projects = new ArrayList<>();
try {
JSONArray baseJsonResponse = new JSONArray(projectJSON);
if (baseJsonResponse.length() > 0) {
for (int i = 0; i < baseJsonResponse.length(); i++) {
JSONObject projectObject = baseJsonResponse.getJSONObject(i);
JSONObject title = projectObject.getJSONObject("title");
// Extract out the title, number of people, and perceived strength values
String projectName = title.getString("rendered");
String projectPrice = "NGN " + projectObject.getString("price");
String projectLocation = projectObject.getString("project_location");
String roi = projectObject.getString("project_roi");
// Create a new {@link Project} object
Project project = new Project(projectName, projectPrice, projectLocation, roi);
projects.add(project);
}
return projects;
}
} catch (JSONException e) {
Log.e(LOG_TAG, "Problem parsing the earthquake JSON results", e);
}
return projects;
}
}
如果我能得到一些帮助，我将不胜感激