Fix URL building logic

Signed-off-by: Artur Ciocanu <ciocanu@adobe.com>

sdk-tests/src/test/java/io/dapr/it/methodinvoke/http/GH_1314_IT.java

@@ -0,0 +1,87 @@
+package io.dapr.it.methodinvoke.http;
+
+import com.github.tomakehurst.wiremock.WireMockServer;
+import com.github.tomakehurst.wiremock.client.WireMock;
+import io.dapr.client.DaprClient;
+import io.dapr.client.DaprClientBuilder;
+import io.dapr.client.domain.HttpExtension;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.util.Map;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.post;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+public class GH_1314_IT {
+
+  private static WireMockServer wireMockServer;
+
+  @BeforeAll
+  static void setup() {
+    wireMockServer = new WireMockServer(3500);
+
+    wireMockServer.start();
+
+    WireMock.configureFor("localhost", 3500);
+
+    stubFor(post(
+        urlEqualTo("/v1.0/invoke/say-hello/method/say-hello/hello")
+    )
+        .willReturn(aResponse()
+            .withStatus(200)
+            .withHeader("Content-Type", "application/json")
+            .withBody("\"Hello from say-hello app!\"")));
+  }
+
+  @AfterAll
+  static void teardown() {
+    wireMockServer.stop();
+  }
+
+  @Test
+  void testInvokeSayHelloWithoutLeadingSlash() {
+    String urlWithoutLeadingSlash = "say-hello/hello";
+
+    sayHelloUsingURL(urlWithoutLeadingSlash);
+  }
+
+  @Test
+  void testInvokeSayHelloWithLeadingSlash() {
+    String urlWithLeadingSlash = "/say-hello/hello";
+
+    sayHelloUsingURL(urlWithLeadingSlash);
+  }
+
+  private static void sayHelloUsingURL(String url) {
+    DaprClient client = new DaprClientBuilder().build();
+
+    try {
+      Map<String, String> requestData = Map.of("message", "Hello");
+
+      String response = client.invokeMethod(
+          "say-hello",
+          url,
+          requestData,
+          HttpExtension.POST,
+          String.class
+      ).block();
+
+      assertEquals("Hello from say-hello app!", response);
+    } catch (Exception e) {
+      fail("Exception occurred: " + e.getMessage());
+    } finally {
+      try {
+        client.close();
+      } catch (Exception e) {
+        fail(e);
+      }
+    }
+  }
+
+}

sdk/src/main/java/io/dapr/client/DaprHttp.java

@@ -24,7 +24,6 @@ import reactor.util.context.ContextView;
 
 import java.io.IOException;
 import java.net.URI;
-import java.net.URISyntaxException;
 import java.net.URLEncoder;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
@@ -324,10 +323,17 @@ public class DaprHttp implements AutoCloseable {
   private static URI createUri(URI uri, String[] pathSegments, Map<String, List<String>> urlParameters) {
     String path = createPath(uri, pathSegments);
     String query = createQuery(urlParameters);
+    StringBuilder result = new StringBuilder();
+
+    result.append(uri.getScheme()).append("://").append(uri.getAuthority()).append(path);
+
+    if (query != null) {
+      result.append("?").append(query);
+    }
 
     try {
-      return new URI(uri.getScheme(), uri.getAuthority(), path, query, null);
-    } catch (URISyntaxException exception) {
+      return URI.create(result.toString());
+    } catch (IllegalArgumentException exception) {
       throw new DaprException(exception);
     }
   }
@@ -346,6 +352,10 @@ public class DaprHttp implements AutoCloseable {
     }
 
     for (String segment : pathSegments) {
+      if (segment == null || segment.isEmpty()) {
+        continue; // Skip empty segments
+      }
+
       pathBuilder.append(encodePathSegment(segment)).append("/"); // Encode each segment
     }
 
@@ -363,6 +373,11 @@ public class DaprHttp implements AutoCloseable {
 
     for (Map.Entry<String, List<String>> entry : urlParameters.entrySet()) {
       String key = entry.getKey();
+
+      if (key == null || key.isEmpty()) {
+        continue; // Skip empty keys
+      }
+
       List<String> values = entry.getValue();
 
       for (String value : values) {