Canonical URL and hreflang tag automation

Question

What's the most efficient way, if it exists, to dynamically add (or automate) the canonical and HREFlang tags to pages, without manually adding  <link rel=”canonical” /> onto head section of each page component? I've seen a possible solution (no JDK 11) in this library: https://github.com/otarsko/aem-seo-canonical-url
And third party tools for XML sitemaps like: https://www.stateofdigital.com/hreflang-sitemap-tool/ 
 
Any other options available? Thanks for any feedback!

arunpatidar · Accepted Answer

you can use sling rewriter pipeline to parse page html and inject canonical and hreflang

https://sling.apache.org/documentation/bundles/output-rewriting-pipelines-org-apache-sling-rewriter.html

https://wttech.blog/blog/2019/how-to-use-sling-transformers-in-aem/

https://github.com/adobe/aem-core-wcm-components/blob/24ae796efb810b420124084923bf66584be4fd96/bundles/core/src/main/java/com/adobe/cq/wcm/core/components/internal/models/v2/PageImpl.java#L340

Ravi_Pampana · Answer

Hi,Checkout https://developer.adobe.com/experience-manager/reference-materials/6-5/javadoc/com/day/cq/wcm/api/variants/PageVariantsProvider.html for adding hreflang tags Ex: List<PageVariant> pageVariants = pageVariantProvider.getVariants(currentPage, slingRequest);

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