Jsoup 라이브러리로 og 태그 크롤링, Cascade 전략 적용

@Component public class JsoupCrawlingHelper { public UrlCrawlingDto getUrlCrawlingInfo(String address) { try { Document document = Jsoup.connect(address).get(); Element imageMeta = document.select("meta[property=og:image]").first(); Element titleMeta = document.select("meta[property=og:title]").first(); Element urlMeta = document.select("meta[property=og:url]").first(); String image = extractMetaContent(imageMeta); String title = extractMetaContent(titleMeta); String url = extractMetaContent(urlMeta); return UrlCrawlingDto.from(url, title, image); } catch (Exception e) { e.printStackTrace(); throw new CustomException(ErrorCode.INTERNAL_SERVER_ERROR); } } private String extractMetaContent(Element metaElement) { return Optional.ofNullable(metaElement) .map(meta -> meta.attr("content")) .orElse(null); } }

@Entity @Getter @NoArgsConstructor(access = AccessLevel.PROTECTED) public class Tag { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "tag_id") private Long id; private String name; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "url_id") @OnDelete(action = OnDeleteAction.NO_ACTION) private Url url;