Add get/set-IfUnmodifiedSince, get/set-IfMatch methods on HttpHeaders [SPR-14228]

[spring-projects-issues]

Sebastiaan van Erk opened SPR-14228 and commented

For a conditional PUT request I would like to use the If-Match header, however there is no corresponding get method on HttpHeaders. Similarly, there is no method for If-Unmodified-Since. The methods do exist for the If-None-Match and If-Modified since headers.

The methods are easy to add and quite useful for optimistic concurrency control on REST services.

For now there is a simple workaround for the missing If-Unmodified-Since method since the getFirstDate(String header) method is public, but it's a bit uglier for the If-Match header since the corresponding getFirstHeaderAsList(String header) method is protected.

Best regards,
Sebastiaan

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Affects: 4.2.5

Issue Links:

• INT-4017 Address the latest changes in the Spring Framework
• Consistent handling of multi-valued headers in HttpHeaders [SPR-14223] #18797 Consistent handling of multi-valued headers in HttpHeaders
• Add common non standard headers to HttpHeaders [SPR-14232] #18806 Add common non standard headers to HttpHeaders

Referenced from: commits 55dae61