105 lines
4.4 KiB
Go
105 lines
4.4 KiB
Go
package main
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import (
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"fmt"
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"net/http"
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)
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// The logError() method is a generic helper for logging an error message. Later in the
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// book we'll upgrade this to use structured logging, and record additional information
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// about the request including the HTTP method and URL.
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func (app *application) logError(r *http.Request, err error) {
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app.logger.PrintError(err, map[string]string{
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"request_method": r.Method,
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"request_url": r.URL.String(),
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})
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}
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// The errorResponse() method is a generic helper for sending JSON-formatted error
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// messages to the client with a given status code. Note that we're using an interface{}
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// type for the message parameter, rather than just a string type, as this gives us
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// more flexibility over the values that we can include in the response.
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func (app *application) errorResponse(w http.ResponseWriter, r *http.Request, status int, message interface{}) {
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env := envelope{"error": message}
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// Write the response using the writeJSON() helper. If this happens to return an
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// error then log it, and fall back to sending the client an empty response with a
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// 500 Internal Server Error status code.
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err := app.writeJSON(w, status, env, nil)
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if err != nil {
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app.logError(r, err)
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w.WriteHeader(500)
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}
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}
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// The serverErrorResponse() method will be used when our application encounters an
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// unexpected problem at runtime. It logs the detailed error message, then uses the
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// errorResponse() helper to send a 500 Internal Server Error status code and JSON
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// response (containing a generic error message) to the client.
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func (app *application) serverErrorResponse(w http.ResponseWriter, r *http.Request, err error) {
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app.logError(r, err)
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message :=
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"the server encountered a problem and could not process your request"
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app.errorResponse(w, r, http.StatusInternalServerError, message)
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}
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// The notFoundResponse() method will be used to send a 404 Not Found status code and
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// JSON response to the client.
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func (app *application) notFoundResponse(w http.ResponseWriter, r *http.Request) {
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message := "the requested resource could not be found"
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app.errorResponse(w, r, http.StatusNotFound, message)
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}
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// The methodNotAllowedResponse() method will be used to send a 405 Method Not Allowed
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// status code and JSON response to the client.
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func (app *application) methodNotAllowedResponse(w http.ResponseWriter, r *http.Request) {
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message := fmt.Sprintf("the %s method is not supported for this resource", r.Method)
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app.errorResponse(w, r, http.StatusMethodNotAllowed, message)
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}
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func (app *application) badRequestResponse(w http.ResponseWriter, r *http.Request, err error) {
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app.errorResponse(w, r, http.StatusBadRequest, err.Error())
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}
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func (app *application) failedValidationResponse(w http.ResponseWriter, r *http.Request, errors map[string]string) {
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app.errorResponse(w, r, http.StatusUnprocessableEntity, errors)
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}
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func (app *application) editConflictResponse(w http.ResponseWriter, r *http.Request) {
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message := "unable to update the record due to an edit conflict, please try again"
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app.errorResponse(w, r, http.StatusConflict, message)
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}
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func (app *application) rateLimitExceededResponse(w http.ResponseWriter, r *http.Request) {
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message := "rate limit exceeded"
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app.errorResponse(w, r, http.StatusTooManyRequests, message)
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}
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func (app *application) invalidCredentialsResponse(w http.ResponseWriter, r *http.Request) {
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message := "invalid authentication credentials"
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app.errorResponse(w, r, http.StatusUnauthorized, message)
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}
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func (app *application) invalidAuthenticationTokenResponse(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("WWW-Authenticate", "Bearer")
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message := "invalid or missing authentication token"
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app.errorResponse(w, r, http.StatusUnauthorized, message)
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}
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func (app *application) authenticationRequiredResponse(w http.ResponseWriter, r *http.Request) {
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message :="you must be authenticated to access this resource"
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app.errorResponse(w, r, http.StatusUnauthorized, message)
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}
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func (app *application) inactiveAccountResponse(w http.ResponseWriter, r *http.Request) {
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message := "your user account must be activated to access this resource"
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app.errorResponse(w, r, http.StatusForbidden, message)
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}
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func (app *application) notPermittedResponse(w http.ResponseWriter, r *http.Request) {
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message := "your user account doesn't have the necessary permissions to access this resource"
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app.errorResponse(w, r, http.StatusForbidden, message)
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}
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