50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package handlers
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import (
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"encoding/json"
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"io"
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"net/http"
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"github.com/docker/distribution/registry/api/errcode"
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)
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// serveJSON marshals v and sets the content-type header to
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// 'application/json'. If a different status code is required, call
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// ResponseWriter.WriteHeader before this function.
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func serveJSON(w http.ResponseWriter, v interface{}) error {
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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sc := http.StatusInternalServerError
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if errs, ok := v.(errcode.Errors); ok && len(errs) > 0 {
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if err, ok := errs[0].(errcode.ErrorCoder); ok {
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if sc2 := err.ErrorCode().Descriptor().HTTPStatusCode; sc2 != 0 {
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sc = sc2
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}
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}
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} else if err, ok := v.(errcode.ErrorCoder); ok {
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if sc2 := err.ErrorCode().Descriptor().HTTPStatusCode; sc2 != 0 {
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sc = sc2
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}
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}
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w.WriteHeader(sc)
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enc := json.NewEncoder(w)
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if err := enc.Encode(v); err != nil {
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return err
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}
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return nil
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}
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// closeResources closes all the provided resources after running the target
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// handler.
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func closeResources(handler http.Handler, closers ...io.Closer) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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for _, closer := range closers {
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defer closer.Close()
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}
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handler.ServeHTTP(w, r)
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})
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}
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