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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package http
import (
"mime/multipart"
"net/textproto"
"net/url"
)
func cloneURLValues(v url.Values) url.Values {
if v == nil {
return nil
}
// http.Header and url.Values have the same representation, so temporarily
// treat it like http.Header, which does have a clone:
return url.Values(Header(v).Clone())
}
func cloneURL(u *url.URL) *url.URL {
if u == nil {
return nil
}
u2 := new(url.URL)
*u2 = *u
if u.User != nil {
u2.User = new(url.Userinfo)
*u2.User = *u.User
}
return u2
}
func cloneMultipartForm(f *multipart.Form) *multipart.Form {
if f == nil {
return nil
}
f2 := &multipart.Form{
Value: (map[string][]string)(Header(f.Value).Clone()),
}
if f.File != nil {
m := make(map[string][]*multipart.FileHeader)
for k, vv := range f.File {
vv2 := make([]*multipart.FileHeader, len(vv))
for i, v := range vv {
vv2[i] = cloneMultipartFileHeader(v)
}
m[k] = vv2
}
f2.File = m
}
return f2
}
func cloneMultipartFileHeader(fh *multipart.FileHeader) *multipart.FileHeader {
if fh == nil {
return nil
}
fh2 := new(multipart.FileHeader)
*fh2 = *fh
fh2.Header = textproto.MIMEHeader(Header(fh.Header).Clone())
return fh2
}
// cloneOrMakeHeader invokes Header.Clone but if the
// result is nil, it'll instead make and return a non-nil Header.
func cloneOrMakeHeader(hdr Header) Header {
clone := hdr.Clone()
if clone == nil {
clone = make(Header)
}
return clone
}
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