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42 lines
980 B
42 lines
980 B
package httputil
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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/seaweedfs/seaweedfs/weed/glog"
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)
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const MaxJSONBodyBytes = 1 << 20
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func NewJSONMaxReader(w http.ResponseWriter, r *http.Request) io.Reader {
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return http.MaxBytesReader(w, r.Body, MaxJSONBodyBytes)
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}
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func DecodeJSONBody(r io.Reader, v interface{}) error {
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decoder := json.NewDecoder(r)
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return decoder.Decode(v)
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}
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func WriteJSON(w http.ResponseWriter, status int, payload interface{}) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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if payload == nil {
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return
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}
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if err := json.NewEncoder(w).Encode(payload); err != nil {
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glog.Errorf("failed to encode JSON response (status=%d, payload=%T): %v", status, payload, err)
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}
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}
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func WriteJSONError(w http.ResponseWriter, status int, message string) {
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WriteJSON(w, status, map[string]string{"error": message})
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}
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func DefaultQuery(value, fallback string) string {
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if value == "" {
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return fallback
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}
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return value
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}
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