jodd-http/src/main/java/jodd/http/HttpRequest.java
public HttpRequest open(final HttpConnection httpConnection) {
		if (this.httpConnection != null) {
			throw new HttpException("Connection already opened");
		}
		this.httpConnection = httpConnection;
		this.httpConnectionProvider = null;
		return this;
	}
public HttpRequest open(final HttpConnection httpConnection) {
		if (this.httpConnection != null) {
			throw new HttpException("Connection already opened");
		}
		this.httpConnection = httpConnection;
		this.httpConnectionProvider = null;
		return this;
	}
Assignees provided {@link jodd.http.HttpConnection} for communication.
It does not actually opens it until the {@link #send() sending}.