1 files changed, 145 insertions, 0 deletions
diff --git a/jtosca/src/main/java/org/onap/sdc/toscaparser/api/utils/UrlUtils.java b/jtosca/src/main/java/org/onap/sdc/toscaparser/api/utils/UrlUtils.java
new file mode 100644
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--- /dev/null
+++ b/jtosca/src/main/java/org/onap/sdc/toscaparser/api/utils/UrlUtils.java
@@ -0,0 +1,145 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.sdc.toscaparser.api.utils;
+
+import org.onap.sdc.toscaparser.api.common.JToscaValidationIssue;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+public class UrlUtils {
+
+    private static final int HTTP_STATUS_OK = 200;
+
+    private UrlUtils() {
+    }
+
+    public static boolean validateUrl(String sUrl) {
+        // Validates whether the given path is a URL or not
+
+        // If the given path includes a scheme (http, https, ftp, ...) and a net
+        // location (a domain name such as www.github.com) it is validated as a URL
+        try {
+            URL url = new URL(sUrl);
+            if (url.getProtocol().equals("file")) {
+                return true;
+            }
+            return url.getAuthority() != null;
+        } catch (MalformedURLException e) {
+            return false;
+        }
+    }
+
+    public static String joinUrl(String sUrl, String relativePath) {
+        // Builds a new URL from the given URL and the relative path
+
+        // Example:
+        //   url: http://www.githib.com/openstack/heat
+        //   relative_path: heat-translator
+        //   - joined: http://www.githib.com/openstack/heat-translator
+        if (!validateUrl(sUrl)) {
+            ThreadLocalsHolder.getCollector().appendValidationIssue(new JToscaValidationIssue("JE255", String.format(
+                    "ValueError: The URL \"%s\" is malformed", sUrl)));
+        }
+        try {
+            URL base = new URL(sUrl);
+            return (new URL(base, relativePath)).toString();
+        } catch (MalformedURLException e) {
+            ThreadLocalsHolder.getCollector().appendValidationIssue(new JToscaValidationIssue("JE256", String.format(
+                    "ValueError: Joining URL \"%s\" and relative path \"%s\" caused an exception", sUrl, relativePath)));
+            return sUrl;
+        }
+    }
+
+    public static boolean isUrlAccessible(String sUrl) {
+        // Validates whether the given URL is accessible
+
+        // Returns true if the get call returns a 200 response code.
+        // Otherwise, returns false.
+        try {
+            HttpURLConnection connection = (HttpURLConnection) new URL(sUrl).openConnection();
+            connection.setRequestMethod("HEAD");
+            int responseCode = connection.getResponseCode();
+            return responseCode == HTTP_STATUS_OK;
+        } catch (IOException e) {
+            return false;
+        }
+    }
+
+}
+
+/*python
+
+from six.moves.urllib.parse import urljoin
+from six.moves.urllib.parse import urlparse
+from toscaparser.common.exception import ValidationIssueCollector
+from toscaparser.utils.gettextutils import _
+
+try:
+    # Python 3.x
+    import urllib.request as urllib2
+except ImportError:
+    # Python 2.x
+    import urllib2
+
+
+class UrlUtils(object):
+
+    @staticmethod
+    def validate_url(path):
+        """Validates whether the given path is a URL or not.
+
+        If the given path includes a scheme (http, https, ftp, ...) and a net
+        location (a domain name such as www.github.com) it is validated as a
+        URL.
+        """
+        parsed = urlparse(path)
+        if parsed.scheme == 'file':
+            # If the url uses the file scheme netloc will be ""
+            return True
+        else:
+            return bool(parsed.scheme) and bool(parsed.netloc)
+
+    @staticmethod
+    def join_url(url, relative_path):
+        """Builds a new URL from the given URL and the relative path.
+
+        Example:
+          url: http://www.githib.com/openstack/heat
+          relative_path: heat-translator
+          - joined: http://www.githib.com/openstack/heat-translator
+        """
+        if not UrlUtils.validate_url(url):
+            ValidationIssueCollector.appendException(
+                ValueError(_('"%s" is not a valid URL.') % url))
+        return urljoin(url, relative_path)
+
+    @staticmethod
+    def url_accessible(url):
+        """Validates whether the given URL is accessible.
+
+        Returns true if the get call returns a 200 response code.
+        Otherwise, returns false.
+        """
+        return urllib2.urlopen(url).getcode() == 200
+*/