64 lines
3.1 KiB
Go
64 lines
3.1 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 along with the current request method and URL as attributes in the log entry.
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func (app *application) logError(r *http.Request, err error) {
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var (
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method = r.Method
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uri = r.URL.RequestURI()
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)
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app.logger.Error(err.Error(), "method", method, "url", uri)
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}
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// The errorResponse() method is a generic helper for sending JSON-formatted error messages to the client with a given status code. Note that we're using the "any" type for the message parameter, rather than just a string type, as this gives us 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 any) {
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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 error then og it, and fall back to sending the client an empty response with a 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 unexpected problem at runtime. It logs the detailed error message, then uses the errorResponse() helper to send a 500 Internal Server Error status code and JSON 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 := "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 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 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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// The errors parameter here has the type map[string]string, which is exactly the same as the errors map contained in our Validator type.
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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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