forked from Cliffbreak/tsviewer
87 lines
1.5 KiB
Go
87 lines
1.5 KiB
Go
package response
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import (
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"encoding/json"
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"log"
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"net/http"
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"git.cliffbreak.de/Cliffbreak/tsviewer/request/meta"
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)
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type HandlerFunc func() (int, error)
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// Responder is a service for responses
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type Responder interface {
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Send(http.ResponseWriter, int)
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}
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// Response data type
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type Response struct {
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Content interface{}
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Pretty bool
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}
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type Envelope struct {
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Data interface{} `json:"data,omitempty"`
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}
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// New creates a new Response
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func New(content interface{}, r *http.Request) *Response {
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var resp Response
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meta := meta.NewFromRequest(r)
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if meta.Envelope {
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resp = Response{
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Content: Envelope{
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Data: content,
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},
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}
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} else {
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resp = Response{
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Content: content,
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}
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}
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resp.Pretty = meta.Pretty
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return &resp
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}
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// Send sends the response
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func (resp Response) Send(w http.ResponseWriter, status int) (int, error) {
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var (
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rawJSON []byte
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err error
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)
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if resp.Pretty {
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rawJSON, err = json.MarshalIndent(resp.Content, "", " ")
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} else {
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rawJSON, err = json.Marshal(resp.Content)
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}
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if err != nil {
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return http.StatusInternalServerError, err
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} else if string(rawJSON) == "null" {
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rawJSON = make([]byte, 0)
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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w.Write(rawJSON)
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return status, nil
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}
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func Handler(w http.ResponseWriter, r *http.Request, hf HandlerFunc) {
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status, err := hf()
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if err == nil {
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return
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}
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log.Printf("HTTP %d: %q", status, err)
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if status, err = New(NewError(status, err), r).Send(w, status); err != nil {
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http.Error(w, http.StatusText(status), status)
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}
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}
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