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requestbody: Add set option to replace request body (#5795)

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Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
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Adrien Pensart 2025-03-12 15:38:51 -04:00 committed by GitHub
parent af2d33afbb
commit dccf3d8982
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2 changed files with 23 additions and 0 deletions
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6
modules/caddyhttp/requestbody/caddyfile.go
View file

@ -68,6 +68,12 @@ func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error)
}
rb.WriteTimeout = timeout
case "set":
var setStr string
if !h.AllArgs(&setStr) {
return nil, h.ArgErr()
}
rb.Set = setStr
default:
return nil, h.Errf("unrecognized request_body subdirective '%s'", h.Val())
}

17
modules/caddyhttp/requestbody/requestbody.go
View file

@ -18,6 +18,7 @@ import (
"errors"
"io"
"net/http"
"strings"
"time"
"go.uber.org/zap"
@ -43,6 +44,10 @@ type RequestBody struct {
// EXPERIMENTAL. Subject to change/removal.
WriteTimeout time.Duration `json:"write_timeout,omitempty"`
// This field permit to replace body on the fly
// EXPERIMENTAL. Subject to change/removal.
Set string `json:"set,omitempty"`
logger *zap.Logger
}
@ -60,6 +65,18 @@ func (rb *RequestBody) Provision(ctx caddy.Context) error {
}
func (rb RequestBody) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
if rb.Set != "" {
if r.Body != nil {
err := r.Body.Close()
if err != nil {
return err
}
}
repl := r.Context().Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
replacedBody := repl.ReplaceAll(rb.Set, "")
r.Body = io.NopCloser(strings.NewReader(replacedBody))
r.ContentLength = int64(len(rb.Set))
}
if r.Body == nil {
return next.ServeHTTP(w, r)
}