Eslam3bdel3al commented on issue #127:
URL:
https://github.com/apache/apisix-go-plugin-runner/issues/127#issuecomment-2223332773
the `setBody([]byte)` sets the body correctly.
the issue I faced related to the **content-length** header, as after setting
the new body **APISIX** seems to send the original **content-length** to the
upstream services when using both "ext-plugin-pre-req" and
"ext-plugin-post-resp", and that leads to issues related to body parsing in
some of these services (express app in my case).
The issue get fixed by deleting the **'content-length'** header after
setting the new body so it get calculated again to the new length.
`r.SetBody(newbody)`
`r.Header().Del("content-length")`
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