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datetime.link/apperror.go

61 lines
1.4 KiB
Go

package main
import (
"net/http"
"go.uber.org/zap"
)
// HTTPError is an error that can be rendered into a HTML page to follow HTTP
// status semantics
type HTTPError struct {
Status int
Error error
}
func (app Datetime) error(httpErr HTTPError, w http.ResponseWriter, req *http.Request) {
tmpl := app.loadTemplate("error", w, req)
if tmpl == nil {
return
}
w.WriteHeader(httpErr.Status)
if req.Method == http.MethodHead {
return
}
err := tmpl.Execute(w, httpErr)
if err != nil {
l.Error("template failed", zap.Error(err))
app.templateError(HTTPError{http.StatusInternalServerError, err}, w, req)
return
}
}
func (app Datetime) simpleError(httpErr HTTPError, w http.ResponseWriter, req *http.Request) {
w.Header().Set("Content-Type", "text/plain")
w.WriteHeader(httpErr.Status)
if req.Method == http.MethodHead {
return
}
if httpErr.Error != nil {
w.Write([]byte(http.StatusText(httpErr.Status) + ": " + httpErr.Error.Error()))
} else {
w.Write([]byte(http.StatusText(httpErr.Status)))
}
}
func (app Datetime) templateError(httpErr HTTPError, w http.ResponseWriter, req *http.Request) {
// Sadly, we probably already sent out the header
//w.Header().Set("Content-Type", "text/plain")
//w.WriteHeader(httpErr.Status)
if httpErr.Error != nil {
w.Write([]byte("\n" + http.StatusText(httpErr.Status) + ": " + httpErr.Error.Error()))
} else {
w.Write([]byte("\n" + http.StatusText(httpErr.Status)))
}
}