CORS Error with Omeka S IIIF Server Module

Overview When distributing IIIF manifests using the Omeka S IIIF Server module, the following CORS error occurred in external viewers. A c c e s s t o f e t c h a t ' h t t p s : / / x x x / i i i f / 2 / 0 9 f d 2 9 d 5 - 8 4 9 7 - 4 d e f - a 6 4 d - c a 1 0 4 2 8 4 f 9 0 d / m a n i f e s t ' f r o m o r i g i n ' h t t p s : / / u n i v e r s a l v i e w e r . i o ' h a s b e e n b l o c k e d b y C O R S p o l i c y : N o ' A c c e s s - C o n t r o l - A l l o w - O r i g i n ' h e a d e r i s p r e s e n t o n t h e r e q u e s t e d r e s o u r c e . I f a n o p a q u e r e s p o n s e s e r v e s y o u r n e e d s , s e t t h e r e q u e s t ' s m o d e t o ' n o - c o r s ' t o f e t c h t h e r e s o u r c e w i t h C O R S d i s a b l e d . This article introduces measures to address CORS errors in Omeka S. Solution https://github.com/Daniel-KM/Omeka-S-module-IiifServer?tab=readme-ov-file#cors-cross-origin-resource-sharing The following was added. S H H H e e e e t F a a a E i d d d n l e e e v e r r r s A M s s s P a e e e P t t t t L c I I I I h f f f C > E E E A m m m T p p p I t t t O y y y N _ A A A E c c c N c c c V e e e s s s " s s s p - - - r C C C o o o o d n n n u t t t c r r r t o o o i l l l o - - - n A A A " l l l l l l o o o w w w - - - O H M r e e i a t g d h i e o n r d s s " * " " " o G r E i T g , i n P , O S x T - " r e q u e s t e d - w i t h , c o n t e n t - t y p e " This resolved the CORS issue. Summary I hope this is helpful when using the Omeka S IIIF Server module and similar tools.

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