小编典典

如何使用Spring Boot WebClient收集分页的API响应?

spring-boot

我有一个来自URL的分页响应,我想继续点击从上一个响应中获得的下一个页面URL,并继续收集项目,直到我的响应中没有“ nextPage”
URL。如何使用WebFlux的Spring Boot WebClient以无阻碍的方式以反应方式实现此目标?

Request1:

    GET /items
    response: 
    {
        items: [...]
        nextPage: "/items?page=2"
    }


    Request2:

    GET /items?page=2
    response: 
    {
        items: [...]
        nextPage: "/items?page=3"
    }


    Request3:

    GET /items?page=3
    response: 
    {
        items: [...]
        nextPage: null
    }

在这里我创建了模拟网址
https://karthikdivi.com/apps/paginatedReviews/withNextPageTokens/items

https://karthikdivi.com/apps/paginatedReviews/withNextPageTokens/items?page=2

https://karthikdivi.com/apps/ paginatedReviews / withNextPageTokens /
items?page =
3

如何以无障碍方式从上述响应中提取所有项目?


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2020-05-30

共1个答案

小编典典

使用扩展,可以实现这一点。根据您提供的模拟网址。

public Mono<List<Item>> getItems() {
    String url = "https://karthikdivi.com/apps/paginatedReviews/withNextPageTokens/items";

    return fetchItems(url).expand(response -> {
        if (response.getNextPage() == null) {
            return Mono.empty();
        }
        return fetchItems(response.getNextPage());
    }).flatMap(response -> Flux.fromIterable(response.getItems())).collectList();
}

private Mono<Response> fetchItems(String url) {

         return client.get().uri(url).retrieve()
                    .bodyToMono(Response.class);
    }
2020-05-30