Adjusting request schema value according to connection tls state.

This closes #223 issue on GitHub.

src/java/nginx/unit/Request.java

@@ -980,11 +980,13 @@ public class Request implements HttpServletRequest, DynamicPathRequest
     @Override
     public boolean isSecure()
     {
-        log("isSecure");
+        trace("isSecure");
 
-        return false;
+        return isSecure(req_ptr);
     }
 
+    private static native boolean isSecure(long req_ptr);
+
     @Override
     public void removeAttribute(String name)
     {

src/java/nxt_jni_Request.c

@@ -56,6 +56,8 @@ static jstring JNICALL nxt_java_Request_getServerName(JNIEnv *env, jclass cls,
     jlong req_ptr);
 static jint JNICALL nxt_java_Request_getServerPort(JNIEnv *env, jclass cls,
     jlong req_ptr);
+static jboolean JNICALL nxt_java_Request_isSecure(JNIEnv *env, jclass cls,
+    jlong req_ptr);
 static void JNICALL nxt_java_Request_log(JNIEnv *env, jclass cls,
     jlong req_info_ptr, jstring msg, jint msg_len);
 static void JNICALL nxt_java_Request_trace(JNIEnv *env, jclass cls,
@@ -166,6 +168,10 @@ nxt_java_initRequest(JNIEnv *env, jobject cl)
           (char *) "(J)I",
           nxt_java_Request_getServerPort },
 
+        { (char *) "isSecure",
+          (char *) "(J)Z",
+          nxt_java_Request_isSecure },
+
         { (char *) "log",
           (char *) "(JLjava/lang/String;I)V",
           nxt_java_Request_log },
@@ -603,6 +609,17 @@ nxt_java_Request_getServerPort(JNIEnv *env, jclass cls, jlong req_ptr)
 }
 
 
+static jboolean JNICALL
+nxt_java_Request_isSecure(JNIEnv *env, jclass cls, jlong req_ptr)
+{
+    nxt_unit_request_t  *r;
+
+    r = nxt_jlong2ptr(req_ptr);
+
+    return r->tls != 0;
+}
+
+
 static void JNICALL
 nxt_java_Request_log(JNIEnv *env, jclass cls, jlong req_info_ptr, jstring msg,
     jint msg_len)