copy-request-header
Puts the same value under two names. This is the migration filter: one service already reads the new header name, another still needs the old one, and the route feeds both.
Parameters
| Name | Type | Required | What it does |
|---|---|---|---|
from |
string | yes | The header read. |
to |
string | yes | The header written. |
Example
filters:
- type: copy-request-header
args:
from: X-Request-Id
to: X-Correlation-IdNotes
Copies every value to the second name and keeps the first. Nothing happens when from is absent.
The target is replaced, not appended to: copying twice would otherwise pile the same value up. Use rename-request-header when the old name has to disappear.