forked from kyma-project/kyma
/
proxyfactory.go
63 lines (53 loc) · 1.6 KB
/
proxyfactory.go
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package proxy
import (
"crypto/tls"
"net/http"
"net/http/httputil"
"net/url"
"strings"
"github.com/kyma-project/kyma/components/gateway/internal/apperrors"
log "github.com/sirupsen/logrus"
)
func makeProxy(targetUrl string, id string, skipVerify bool) (*httputil.ReverseProxy, apperrors.AppError) {
target, err := url.Parse(targetUrl)
if err != nil {
return nil, apperrors.Internal("failed to parse target url '%s'", target)
}
targetQuery := target.RawQuery
director := func(req *http.Request) {
log.Infof("Proxy call for service '%s' to '%s'", id, targetUrl)
req.URL.Scheme = target.Scheme
req.URL.Host = target.Host
req.Host = target.Host
req.URL.Path = joinPaths(target.Path, req.URL.Path)
if targetQuery == "" || req.URL.RawQuery == "" {
req.URL.RawQuery = targetQuery + req.URL.RawQuery
} else {
req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery
}
if _, ok := req.Header["User-Agent"]; !ok {
// explicitly disable User-Agent so it's not set to default value
req.Header.Set("User-Agent", "")
}
log.Infof("Modified request url : '%s', schema : '%s', path : '%s'", req.URL.String(), req.URL.Scheme, req.URL.Path)
}
newProxy := &httputil.ReverseProxy{Director: director}
if skipVerify {
newProxy.Transport = &http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: true}}
}
return newProxy, nil
}
func joinPaths(a, b string) string {
if b == "" {
return a
}
aslash := strings.HasSuffix(a, "/")
bslash := strings.HasPrefix(b, "/")
switch {
case aslash && bslash:
return a + b[1:]
case !aslash && !bslash:
return a + "/" + b
}
return a + b
}