How to get HTML generated by a controller method as a HTML String

Question

I have a method in a @Controller which generates a ModelAndView and rendered a JSP page. The resulting HTML is a report which is refreshed on-screen every few minutes.

I've now been asked to provide a snapshot of the report on the last day of each month. I feel the best way to do this without too much refactoring of the application is on the last day of each month, simulate a call to the method that generates the report, and capture the generated HTML so it can be rendered at any point in future.

I know how to setup a scheduled task within Spring Boot, but I'm struggling to figure out how to simulate a call to a controller and grab the response as a String that contains the HTML response from the report.

Wouldn't it be better if you save the data for that specific time (last day of each month) and render HTML for it when the user requests it? — Leone
– Leone, Commented Feb 7, 2018 at 13:32
Ideally that's what I would prefer to do, but it's much more time consuming as the visual report contains 4 different tables each with different types of data, so storing all of this data takes longer and currently not necessary for its use case. — SheppardDigital
– SheppardDigital, Commented Feb 7, 2018 at 13:44

Leone · Accepted Answer · 2018-02-07 14:10:03Z

2

If you insist on the method you described, you can use the RestTemplate class

RestTemplate restTemplate = new RestTemplate();
String url = "http://<path-to-your-report-view>";

ResponseEntity<String> response = restTemplate.getForEntity(url, String.class);
if (response.getStatusCode() == HttpStatus.OK) {
    String result = response.getBody();
    // ... Save the result
}

answered Feb 7, 2018 at 14:10

Leone

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