forked from TrueCloudLab/certificates
74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
package api
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import (
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"encoding/json"
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"io"
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"log"
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"net/http"
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"github.com/smallstep/certificates/errs"
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"github.com/smallstep/certificates/logging"
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)
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// EnableLogger is an interface that enables response logging for an object.
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type EnableLogger interface {
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ToLog() (interface{}, error)
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}
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// LogError adds to the response writer the given error if it implements
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// logging.ResponseLogger. If it does not implement it, then writes the error
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// using the log package.
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func LogError(rw http.ResponseWriter, err error) {
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if rl, ok := rw.(logging.ResponseLogger); ok {
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rl.WithFields(map[string]interface{}{
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"error": err,
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})
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} else {
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log.Println(err)
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}
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}
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// LogEnabledResponse log the response object if it implements the EnableLogger
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// interface.
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func LogEnabledResponse(rw http.ResponseWriter, v interface{}) {
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if el, ok := v.(EnableLogger); ok {
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out, err := el.ToLog()
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if err != nil {
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LogError(rw, err)
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return
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}
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if rl, ok := rw.(logging.ResponseLogger); ok {
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rl.WithFields(map[string]interface{}{
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"response": out,
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})
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} else {
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log.Println(out)
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}
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}
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}
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// JSON writes the passed value into the http.ResponseWriter.
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func JSON(w http.ResponseWriter, v interface{}) {
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JSONStatus(w, v, http.StatusOK)
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}
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// JSONStatus writes the given value into the http.ResponseWriter and the
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// given status is written as the status code of the response.
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func JSONStatus(w http.ResponseWriter, v interface{}, status int) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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if err := json.NewEncoder(w).Encode(v); err != nil {
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LogError(w, err)
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return
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}
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LogEnabledResponse(w, v)
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}
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// ReadJSON reads JSON from the request body and stores it in the value
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// pointed by v.
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func ReadJSON(r io.Reader, v interface{}) error {
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if err := json.NewDecoder(r).Decode(v); err != nil {
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return errs.Wrap(http.StatusBadRequest, err, "error decoding json")
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}
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return nil
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}
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