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helpers.go
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/
helpers.go
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// Package api provides the web interface
package api
import (
"encoding/json"
"errors"
"io"
"net/http"
"github.com/foroozf001/logger-service/internal/data"
)
type jsonResponse struct {
Error bool `json:"error"`
Message string `json:"message"`
Data any `json:"data,omitempty"`
}
func (app *Config) readJSON(w http.ResponseWriter, r *http.Request, data any) error {
maxBytes := 1048576
r.Body = http.MaxBytesReader(w, r.Body, int64(maxBytes))
dec := json.NewDecoder(r.Body)
err := dec.Decode(data)
if err != nil {
return err
}
err = dec.Decode(&struct{}{})
if err != io.EOF {
return errors.New("body must have only a single JSON value")
}
return nil
}
func (app *Config) writeJSON(w http.ResponseWriter, r *http.Request, status int, data any, headers ...http.Header) error {
out, err := json.Marshal(data)
if err != nil {
return err
}
if len(headers) > 0 {
for key, value := range headers[0] {
w.Header()[key] = value
}
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(status)
_, err = w.Write(out)
if err != nil {
return err
}
return nil
}
func (app *Config) errorJSON(w http.ResponseWriter, r *http.Request, err error, status ...int) error {
statusCode := http.StatusBadRequest
if len(status) > 0 {
statusCode = status[0]
}
var payload jsonResponse
payload.Error = true
payload.Message = err.Error()
return app.writeJSON(w, r, statusCode, payload)
}
// logEvent inserts a log item into the database
func (app *Config) logEvent(name, content string) error {
event := data.LogItem{
Name: name,
Data: content,
}
return app.Models.LogItem.Insert(event)
}