Fix crash with invalid TCP port

src/com/owncloud/android/lib/common/OwnCloudClient.java

@@ -39,6 +39,7 @@ import org.apache.commons.httpclient.HttpMethodBase;
 import org.apache.commons.httpclient.HttpStatus;
 import org.apache.commons.httpclient.HttpVersion;
 import org.apache.commons.httpclient.URI;
+import org.apache.commons.httpclient.URIException;
 import org.apache.commons.httpclient.cookie.CookiePolicy;
 import org.apache.commons.httpclient.methods.HeadMethod;
 import org.apache.commons.httpclient.params.HttpMethodParams;
@@ -90,13 +91,14 @@ public class OwnCloudClient extends HttpClient {
         getParams().setParameter(HttpMethodParams.USER_AGENT, userAgent);
         getParams().setParameter(
             PARAM_PROTOCOL_VERSION,
-        		HttpVersion.HTTP_1_1);
+            HttpVersion.HTTP_1_1
+        );
 
-        getParams().setCookiePolicy(
-        		CookiePolicy.IGNORE_COOKIES);
+        getParams().setCookiePolicy(CookiePolicy.IGNORE_COOKIES);
         getParams().setParameter(
             PARAM_SINGLE_COOKIE_HEADER,             // to avoid problems with some web servers
-        		PARAM_SINGLE_COOKIE_HEADER_VALUE);
+            PARAM_SINGLE_COOKIE_HEADER_VALUE
+        );
 
         applyProxySettings();
 
@@ -143,10 +145,9 @@ public class OwnCloudClient extends HttpClient {
     /**
      * Check if a file exists in the OC server
      *
-     * @deprecated	Use ExistenceCheckOperation instead
-     * 
      * @return 'true' if the file exists; 'false' it doesn't exist
      * @throws Exception When the existence could not be determined
+     * @deprecated Use ExistenceCheckOperation instead
      */
     @Deprecated
     public boolean existsFile(String path) throws IOException, HttpException {
@@ -165,11 +166,11 @@ public class OwnCloudClient extends HttpClient {
 
     /**
      * Requests the received method with the received timeout (milliseconds).
-     * 
+     * <p>
      * Executes the method through the inherited HttpClient.executedMethod(method).
-     * 
+     * <p>
      * Sets the socket and connection timeouts only for the method received.
-     * 
+     * <p>
      * The timeouts are both in milliseconds; 0 means 'infinite';
      * < 0 means 'do not change the default'
      *
@@ -199,19 +200,20 @@ public class OwnCloudClient extends HttpClient {
 
     /**
      * Requests the received method.
-     *
+     * <p>
      * Executes the method through the inherited HttpClient.executedMethod(method).
      *
      * @param method HTTP method request.
      */
     @Override
     public int executeMethod(HttpMethod method) throws IOException {
-        try {
         // Update User Agent
         HttpParams params = method.getParams();
         String userAgent = OwnCloudClientManagerFactory.getUserAgent();
         params.setParameter(HttpMethodParams.USER_AGENT, userAgent);
 
+        preventCrashDueToInvalidPort(method);
+
         Log_OC.d(TAG + " #" + mInstanceNumber, "REQUEST " +
             method.getName() + " " + method.getPath());
 
@@ -230,10 +232,32 @@ public class OwnCloudClient extends HttpClient {
         //logSetCookiesAtResponse(method.getResponseHeaders());
 
         return status;
+    }
 
-        } catch (IOException e) {
-            //Log_OC.d(TAG + " #" + mInstanceNumber, "Exception occurred", e);
-            throw e;
+
+    /**
+     * Fix for https://github.com/owncloud/android/issues/1847#issuecomment-267558274
+     *
+     * The problem: default SocketFactory in HTTPClient 3.x for HTTP connections creates a separate thread
+     * to create the socket. When a port out of TCP bounds is passed, an exception is thrown in that
+     * separate thread, and our original thread is not able to catch it. This is not happenning with HTTPS
+     * connections because we had to define our own socket factory,
+     * {@link com.owncloud.android.lib.common.network.AdvancedSslSocketFactory}, and it does not mess with
+     * threads.
+     *
+     * The solution: validate the input (the port number) ourselves before let the work to HTTPClient 3.x.
+     *
+     * @param method HTTP method to run.
+     * @throws IllegalArgumentException If 'method' targets an invalid port in an HTTP URI.
+     * @throws URIException             If the URI to the target server cannot be built.
+     */
+    private void preventCrashDueToInvalidPort(HttpMethod method) throws URIException {
+        int port = method.getURI().getPort();
+        String scheme = method.getURI().getScheme().toLowerCase();
+        if ("http".equals(scheme) && port > 0xFFFF) {
+            // < 0 is not tested because -1 is used when no port number is specified in the URL;
+            // no problem, the network library will convert that in the default HTTP port
+            throw new IllegalArgumentException("Invalid port number " + port);
         }
     }
 
@@ -337,7 +361,7 @@ public class OwnCloudClient extends HttpClient {
 
     /**
      * Sets the root URI to the ownCloud server.
-     *
+     * <p>
      * Use with care.
      *
      * @param uri
@@ -407,7 +431,6 @@ public class OwnCloudClient extends HttpClient {
         if (counter == 0) {
             Log_OC.d(TAG + " #" + mInstanceNumber, "No set-cookie");
         }
-        
     }
 
     public String getCookiesString() {