public static void main(final String... args)throws Exception {
        // Execute a GET with timeout settings and return response content as String.
        Request.get("http://somehost/")
                .connectTimeout(Timeout.ofSeconds(1))
                .responseTimeout(Timeout.ofSeconds(5))
                .execute().returnContent().asString();

        // Execute a POST with the 'expect-continue' handshake, using HTTP/1.1,
        // containing a request body as String and return response content as byte array.
        Request.post("http://somehost/do-stuff")
                .useExpectContinue()
                .version(HttpVersion.HTTP_1_1)
                .bodyString("Important stuff", ContentType.DEFAULT_TEXT)
                .execute().returnContent().asBytes();

        // Execute a POST with a custom header through the proxy containing a request body
        // as an HTML form and save the result to the file
        Request.post("http://somehost/some-form")
                .addHeader("X-Custom-header", "stuff")
                .viaProxy(new HttpHost("myproxy", 8080))
                .bodyForm(Form.form().add("username", "vip").add("password", "secret").build())
                .execute().saveContent(new File("result.dump"));
    }
This example demonstrates basics of request execution with the HttpClient fluent API.
httpclient5-fluent/src/test/java/org/apache/hc/client5/http/examples/fluent/FluentRequests.java