| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package util |
| |
| import ( |
| "bytes" |
| "html/template" |
| "net/http" |
| |
| "v.io/x/ref/internal/logger" |
| ) |
| |
| // HTTPBadRequest sends an HTTP 400 error on 'w' and renders a pretty page. |
| // If err is not nil, it also renders the string representation of err in the response page. |
| func HTTPBadRequest(w http.ResponseWriter, req *http.Request, err error) { |
| w.WriteHeader(http.StatusBadRequest) |
| if e := tmplBadRequest.Execute(w, badRequestData{Request: requestString(req), Error: err}); e != nil { |
| logger.Global().Errorf("Failed to execute Bad Request Template: %v", e) |
| } |
| } |
| |
| // ServerError sends an HTTP 500 error on 'w' and renders a pretty page that |
| // also has the string representation of err. |
| func HTTPServerError(w http.ResponseWriter, err error) { |
| w.WriteHeader(http.StatusInternalServerError) |
| if e := tmplServerError.Execute(w, err); e != nil { |
| logger.Global().Errorf("Failed to execute Server Error template: %v", e) |
| } |
| } |
| |
| var ( |
| tmplBadRequest = template.Must(template.New("Bad Request").Parse(`<!doctype html> |
| <html> |
| <head> |
| <meta charset="UTF8"> |
| <title>Bad Request</title> |
| </head> |
| <body> |
| <h1>Bad Request</h1> |
| {{with $data := .}} |
| {{if $data.Error}}Error: {{$data.Error}}{{end}} |
| <pre> |
| {{$data.Request}} |
| </pre> |
| {{end}} |
| </body> |
| </html>`)) |
| |
| tmplServerError = template.Must(template.New("Server Error").Parse(`<!doctype html> |
| <html> |
| <head> |
| <meta charset="UTF8"> |
| <title>Server Error</title> |
| </head> |
| <body> |
| <h1>Oops! Error at the server</h1> |
| Error: {{.}} |
| <br/> |
| Ask the server administrator to check the server logs |
| </body> |
| </html>`)) |
| ) |
| |
| func requestString(r *http.Request) string { |
| var buf bytes.Buffer |
| r.Write(&buf) |
| return buf.String() |
| } |
| |
| type badRequestData struct { |
| Request string |
| Error error |
| } |
