支持重定向 (#7)

app-updater/src/main/java/com/king/app/updater/http/HttpManager.java

@@ -24,6 +24,9 @@ import javax.net.ssl.HttpsURLConnection;
  */
 public class HttpManager implements IHttpManager {
 
+    private static final int HTTP_TEMP_REDIRECT = 307;
+    private static final int HTTP_PERM_REDIRECT = 308;
+
     private static final int DEFAULT_TIME_OUT = 20000;
 
     private int mTimeout;
@@ -91,12 +94,7 @@ public class HttpManager implements IHttpManager {
 
         }
 
-        @Override
-        protected File doInBackground(Void... voids) {
-
-            try {
-                HttpsURLConnection.setDefaultSSLSocketFactory(SSLSocketFactoryUtils.createSSLSocketFactory());
-                HttpsURLConnection.setDefaultHostnameVerifier(SSLSocketFactoryUtils.createTrustAllHostnameVerifier());
+        private File download(String url) throws Exception{
                 HttpURLConnection connect = (HttpURLConnection)new URL(url).openConnection();
                 connect.setRequestMethod("GET");
                 connect.setRequestProperty("Accept-Encoding", "identity");
@@ -111,51 +109,73 @@ public class HttpManager implements IHttpManager {
                 }
 
                 connect.connect();
-                int responseCode = connect.getResponseCode();
-                Log.d(Constants.TAG,"Content-Type:" + connect.getContentType());
-                if(responseCode == HttpURLConnection.HTTP_OK){
 
-                    InputStream is = connect.getInputStream();
+                Log.d(Constants.TAG,"Content-Type:" + connect.getContentType());
+                int responseCode = connect.getResponseCode();
+                switch (responseCode){
+                    case HttpURLConnection.HTTP_OK: {
+                        InputStream is = connect.getInputStream();
 
-                    long length = connect.getContentLength();
+                        long length = connect.getContentLength();
 
-                    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-                        length = connect.getContentLengthLong();
-                    }
+                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                            length = connect.getContentLengthLong();
+                        }
 
-                    Log.d(Constants.TAG,"contentLength:" + length);
+                        Log.d(Constants.TAG, "contentLength:" + length);
+
+                        long progress = 0;
+
+                        byte[] buffer = new byte[8192];
+
+                        int len;
+                        File file = new File(path, filename);
+                        FileOutputStream fos = new FileOutputStream(file);
+                        while ((len = is.read(buffer)) != -1) {
+                            if (isCancel) {
+                                cancel(true);
+                                break;
+                            }
+                            fos.write(buffer, 0, len);
+                            progress += len;
+                            //更新进度
+                            if (length > 0) {
+                                publishProgress(progress, length);
+                            }
+                        }
 
-                    long progress = 0;
+                        fos.flush();
+                        fos.close();
+                        is.close();
 
-                    byte[] buffer = new byte[8192];
+                        connect.disconnect();
 
-                    int len;
-                    File file = new File(path,filename);
-                    FileOutputStream fos = new FileOutputStream(file);
-                    while ((len = is.read(buffer)) != -1){
-                        if(isCancel){
-                            cancel(true);
-                            break;
-                        }
-                        fos.write(buffer,0,len);
-                        progress += len;
-                        //更新进度
-                        if(length>0){
-                            publishProgress(progress,length);
-                        }
+                        return file;
                     }
+                    case HttpURLConnection.HTTP_MULT_CHOICE:
+                    case HttpURLConnection.HTTP_MOVED_PERM:
+                    case HttpURLConnection.HTTP_MOVED_TEMP:
+                    case HttpURLConnection.HTTP_SEE_OTHER:
+                    case HTTP_TEMP_REDIRECT:
+                    case HTTP_PERM_REDIRECT: {//重定向
+                        String redirectUrl = connect.getHeaderField("Location");
+                        Log.d(Constants.TAG,"redirectUrl = " + redirectUrl);
+                        connect.disconnect();
+                        return download(redirectUrl);
+                    }
+                        default://连接失败
+                            throw new ConnectException(String.format("responseCode = %d",responseCode));
 
-                    fos.flush();
-                    fos.close();
-                    is.close();
-
-                    connect.disconnect();
-
-                    return file;
-                }else {//连接失败
-                    throw new ConnectException(String.format("responseCode = %d",responseCode));
                 }
+        }
 
+        @Override
+        protected File doInBackground(Void... voids) {
+
+            try{
+                HttpsURLConnection.setDefaultSSLSocketFactory(SSLSocketFactoryUtils.createSSLSocketFactory());
+                HttpsURLConnection.setDefaultHostnameVerifier(SSLSocketFactoryUtils.createTrustAllHostnameVerifier());
+                return download(url);
             } catch (Exception e) {
                 this.exception = e;
                 e.printStackTrace();
@@ -196,7 +216,6 @@ public class HttpManager implements IHttpManager {
             }
         }
 
-
         @Override
         protected void onCancelled() {
             super.onCancelled();