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render/reader.go
48 строк
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refactor(render): remove headers parameter from writeHeader (#4353)
19 сен 2025, 03:39
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19 сен 2025, 03:39
e198f6e
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// Copyright 2018 Gin Core Team. All rights reserved. // Use of this source code is governed by a MIT style // license that can be found in the LICENSE file. package render import ( "io" "net/http" "strconv" ) // Reader contains the IO reader and its length, and custom ContentType and other headers. type Reader struct { ContentType string ContentLength int64 Reader io.Reader Headers map[string]string } // Render (Reader) writes data with custom ContentType and headers. func (r Reader) Render(w http.ResponseWriter) (err error) { r.WriteContentType(w) if r.ContentLength >= 0 { if r.Headers == nil { r.Headers = map[string]string{} } r.Headers["Content-Length"] = strconv.FormatInt(r.ContentLength, 10) } r.writeHeaders(w) _, err = io.Copy(w, r.Reader) return } // WriteContentType (Reader) writes custom ContentType. func (r Reader) WriteContentType(w http.ResponseWriter) { writeContentType(w, []string{r.ContentType}) } // writeHeaders writes headers from r.Headers into response. func (r Reader) writeHeaders(w http.ResponseWriter) { header := w.Header() for k, v := range r.Headers { if header.Get(k) == "" { header.Set(k, v) } } }