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query_param.go
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/
query_param.go
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package handlers
import (
"net/http"
"strings"
router_http "code.cloudfoundry.org/gorouter/common/http"
"code.cloudfoundry.org/gorouter/logger"
"github.com/uber-go/zap"
"github.com/urfave/negroni/v3"
)
type queryParam struct {
logger logger.Logger
}
// NewQueryParam creates a new handler that emits warnings if requests came in with semicolons un-escaped
func NewQueryParam(logger logger.Logger) negroni.Handler {
return &queryParam{logger: logger}
}
func (q *queryParam) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
logger := LoggerWithTraceInfo(q.logger, r)
semicolonInParams := strings.Contains(r.RequestURI, ";")
if semicolonInParams {
logger.Warn("deprecated-semicolon-params", zap.String("vcap_request_id", r.Header.Get(VcapRequestIdHeader)))
}
next(rw, r)
if semicolonInParams {
rw.Header().Add(router_http.CfRouterError, "deprecated-semicolon-params")
}
}