/
http_rewrite.go
51 lines (42 loc) · 1.32 KB
/
http_rewrite.go
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package handlers
import (
"net/http"
"github.com/urfave/negroni/v3"
"code.cloudfoundry.org/gorouter/config"
"code.cloudfoundry.org/gorouter/proxy/utils"
)
type httpRewriteHandler struct {
responseHeaderRewriters []utils.HeaderRewriter
}
func headerNameValuesToHTTPHeader(headerNameValues []config.HeaderNameValue) http.Header {
h := http.Header{}
for _, hv := range headerNameValues {
h.Add(hv.Name, hv.Value)
}
return h
}
func NewHTTPRewriteHandler(cfg config.HTTPRewrite, headersToAlwaysRemove []string) negroni.Handler {
addHeadersIfNotPresent := headerNameValuesToHTTPHeader(
cfg.Responses.AddHeadersIfNotPresent,
)
headers := cfg.Responses.RemoveHeaders
for _, header := range headersToAlwaysRemove {
headers = append(headers, config.HeaderNameValue{Name: header})
}
removeHeaders := headerNameValuesToHTTPHeader(
headers,
)
return &httpRewriteHandler{
responseHeaderRewriters: []utils.HeaderRewriter{
&utils.RemoveHeaderRewriter{Header: removeHeaders},
&utils.AddHeaderIfNotPresentRewriter{Header: addHeadersIfNotPresent},
},
}
}
func (p *httpRewriteHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
proxyWriter := rw.(utils.ProxyResponseWriter)
for _, rewriter := range p.responseHeaderRewriters {
proxyWriter.AddHeaderRewriter(rewriter)
}
next(rw, r)
}