[CAMEL-13598] camel-olingo4 - Support ETag / If-Match Headers when using CUD operations

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.21.5, 2.22.4
• Fix Version/s: 3.0.0.RC1
• Component/s: camel-olingo4
• Estimated Complexity: Unknown
• Assignee: Andrea Cosentino
• Reporter: Paul Richardson
• Created: 29/May/19 17:03
• Updated: 23/Aug/19 08:52
• Resolved: 23/Aug/19 08:51

Description

The Tripin Reference server supports ETags on its Airlines resource. Consequently, if an update or delete operation is performed then the following must occur:

1. Client calls a GET request & fetches the content of the ETag header;
2. Client calls a PATCH/DELETE request complete with an If-None-Match header that has a value of the previously queried ETag.

At the moment, attempts to use the camel-olingo4 implementation fail with an http 428 code.

Please see following for more information:

• https://www.odata.org/getting-started/basic-tutorial/#etag
• https://www.odata.org/documentation/odata-version-2-0/operations/
• https://olingo.apache.org/doc/odata4/overview.html#definition-of-the-web-infrastructure
• https://www.logicbig.com/quick-info/web/etag-header.html

Issue Links

• links to: GitHub Pull Request #3118