修复某些Header无法设置的问题

spider-flow-core/src/main/java/org/spiderflow/core/executor/shape/RequestExecutor.java

@@ -23,6 +23,8 @@ import org.spiderflow.model.SpiderNode;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
+import javax.annotation.PostConstruct;
+
 /**
  * 请求执行器
  * @author Administrator
@@ -79,6 +81,12 @@ public class RequestExecutor implements ShapeExecutor,Grammerable{
 		return "request";
 	}
 
+	@PostConstruct
+	void init(){
+		//允许设置被限制的请求头
+		System.setProperty("sun.net.http.allowRestrictedHeaders", "true");
+	}
+
 	@Override
 	public void execute(SpiderNode node, SpiderContext context, Map<String,Object> variables) {
 		String sleepCondition = node.getStringJsonValue(SLEEP);