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We keep getting blocked by CORS policy errors when our mobile web app calls our API gateway. What is the correct way to handle preflight OPTIONS requests in Nginx?

ChatGPTgpt-61 query10/31/2026
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We keep getting blocked by CORS policy errors when our mobile web app calls our API gateway. What is the correct way to handle preflight OPTIONS requests in Nginx?
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Nginx official documentation add_header always OPTIONS CORS preflight MDN Access-Control-Allow-Headers credentialsGoogle ↗
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Nginx official documentation add_header always OPTIONS CORS preflight MDN Access-Control-Allow-Headers credentials Google ↗

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Nginx official documentation add_header always OPTIONS CORS preflight MDN Access-Control-Allow-Headers credentials
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