Handling Special Cases

User-generated content requires special strategies to prevent mixed content while maintaining functionality. Input sanitization should validate and correct URLs during submission. Existing content needs batch processing to identify and fix HTTP resources. Oembeds and rich media embeds require provider support for HTTPS. Clear user guidelines help prevent future mixed content introduction.

Legacy systems and archived content present unique challenges. Historical content may reference resources no longer available via HTTPS. Archived external resources might require local hosting to ensure HTTPS availability. Balance between historical accuracy and security requires case-by-case decisions. Progressive enhancement strategies can provide degraded but secure experiences.

Development and staging environments need mixed content prevention to establish good practices. Self-signed certificates cause developers to ignore warnings, potentially missing mixed content issues. Proper development certificates through tools like mkcert enable realistic testing. Environment parity between development and production prevents surprise mixed content in deployment.

API responses containing HTTP URLs require systematic handling. Backend services should return HTTPS URLs or protocol-relative URLs. API documentation should specify URL format requirements. Client applications need robust handling of various URL formats. Versioning strategies allow gradual migration while maintaining compatibility.