Enhance connection error messages

Handle each exception in OCHttpClient::execute separately to help diagnose

src/main/java/fr/unix_experience/owncloud_sms/engine/OCHttpClient.java

@@ -32,6 +32,7 @@ import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
+import java.net.ProtocolException;
 import java.net.URL;
 import java.nio.charset.Charset;
 
@@ -152,7 +153,26 @@ public class OCHttpClient {
 		HttpURLConnection urlConnection = null;
 		try {
 			urlConnection = (HttpURLConnection) url.openConnection();
+		} catch (IOException e) {
+			Log.e(OCHttpClient.TAG, "Failed to open connection to server: " + e);
+			throw new OCSyncException(R.string.err_sync_http_request_ioexception, OCSyncErrorType.IO);
+		} finally {
+			if (urlConnection != null) {
+				urlConnection.disconnect();
+			}
+		}
+
+		if (urlConnection == null) {
+			Log.e(OCHttpClient.TAG, "Failed to open connection to server: null urlConnection");
+			throw new OCSyncException(R.string.err_sync_http_request_ioexception, OCSyncErrorType.IO);
+		}
+
+		try {
 			urlConnection.setRequestMethod(method);
+		} catch (ProtocolException e) {
+			Log.e(OCHttpClient.TAG, "Fatal error when setting request method: " + e);
+			throw new OCSyncException(R.string.err_sync_http_request_ioexception, OCSyncErrorType.IO);
+		}
 		urlConnection.setRequestProperty("User-Agent", _userAgent);
 		urlConnection.setInstanceFollowRedirects(true);
 		if (!"GET".equals(method)) {
@@ -168,20 +188,17 @@ public class OCHttpClient {
 		urlConnection.setChunkedStreamingMode(0);
 
 		if (!"GET".equals(method)) {
+			try {
 				OutputStream out = new BufferedOutputStream(urlConnection.getOutputStream());
 				out.write(requestBody.getBytes(Charset.forName("UTF-8")));
 				out.close();
+			} catch (IOException e) {
+				Log.e(OCHttpClient.TAG, "Failed to open connection to server: " + e);
+				throw new OCSyncException(R.string.err_sync_http_write_failed, OCSyncErrorType.IO);
+			}
 		}
 
 		response = handleHTTPResponse(urlConnection, skipError);
-		} catch (IOException e) {
-			throw new OCSyncException(R.string.err_sync_http_request_ioexception, OCSyncErrorType.IO);
-		} finally {
-			if (urlConnection != null) {
-				urlConnection.disconnect();
-			}
-		}
-
 		return response;
 	}
 

src/main/res/values-en-rGB/strings.xml

@@ -183,4 +183,5 @@
     <string name="no_confirm">No</string>
     <string name="pref_show_sync_notifications">Show sync notifications</string>
     <string name="sync_complete">Synchronisation complete</string>
+    <string name="err_sync_http_write_failed">Error #19: Failed to write HTTP stream when pushing data to server.</string>
 </resources>

src/main/res/values-en/strings.xml

@@ -159,5 +159,6 @@
     <string name="no_confirm">No</string>
     <string name="pref_show_sync_notifications">Show sync notifications</string>
     <string name="sync_complete">Synchronization complete</string>
+    <string name="err_sync_http_write_failed">Error #19: Failed to write HTTP stream when pushing data to server.</string>
 
 </resources>

src/main/res/values-fr/strings.xml

@@ -183,4 +183,5 @@
     <string name="no_confirm">Non</string>
     <string name="pref_show_sync_notifications">Afficher les notifications de synchronisation</string>
     <string name="sync_complete">Synchronisation terminée</string>
+    <string name="err_sync_http_write_failed">Erreur #19: échec d\'écriture du flux HTTP lors de la poussée d\'informations vers le serveur.</string>
 </resources>

src/main/res/values/strings.xml

@@ -272,4 +272,5 @@
     <string name="no_confirm">No</string>
     <string name="pref_show_sync_notifications">Show sync notifications</string>
     <string name="sync_complete">Synchronization complete</string>
+    <string name="err_sync_http_write_failed">Error #19: Failed to write HTTP stream when pushing data to server.</string>
 </resources>