654e958d3f
Resources that can be grouped into the http:server resource must have that prefix. Grouping is basically hierarchical, and without that common prefix, it means we'd have to special-case our grouping algorithm.
92 lines
3.4 KiB
Go
92 lines
3.4 KiB
Go
// Mgmt
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// Copyright (C) James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// Additional permission under GNU GPL version 3 section 7
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//
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// If you modify this program, or any covered work, by linking or combining it
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// with embedded mcl code and modules (and that the embedded mcl code and
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// modules which link with this program, contain a copy of their source code in
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// the authoritative form) containing parts covered by the terms of any other
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// license, the licensors of this program grant you additional permission to
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// convey the resulting work. Furthermore, the licensors of this program grant
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// the original author, James Shubin, additional permission to update this
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// additional permission if he deems it necessary to achieve the goals of this
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// additional permission.
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package resources
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import (
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"net/http"
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"os"
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"strconv"
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)
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const (
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httpKind = "http"
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)
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// httpError represents a specific HTTP error to send, but can be stored as an
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// internal golang `error` type.
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type httpError struct {
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msg string
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code int
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}
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// Error is required to implement the `error` type interface.
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func (obj *httpError) Error() string {
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return strconv.Itoa(obj.code) + " " + obj.msg
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}
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// newHTTPError generates a new httpError based on a single status code. It gets
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// the msg text from the http.StatusText method.
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func newHTTPError(code int) error {
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return &httpError{
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msg: http.StatusText(code),
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code: code,
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}
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}
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// toHTTPError returns a non-specific HTTP error message and status code for a
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// given non-nil error value. It's important that toHTTPError does not actually
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// return err.Error(), since msg and httpStatus are returned to users, and
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// historically Go's ServeContent always returned just "404 Not Found" for all
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// errors. We don't want to start leaking information in error messages.
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// NOTE: This was copied and modified slightly from the golang net/http package.
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// See: https://github.com/golang/go/issues/38375
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func toHTTPError(err error) (msg string, httpStatus int) {
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if e, ok := err.(*httpError); ok {
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return e.msg, e.code
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}
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if os.IsNotExist(err) {
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//return "404 page not found", http.StatusNotFound
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return http.StatusText(http.StatusNotFound), http.StatusNotFound
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}
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if os.IsPermission(err) {
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//return "403 Forbidden", http.StatusForbidden
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return http.StatusText(http.StatusForbidden), http.StatusForbidden
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}
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// Default:
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//return "500 Internal Server Error", http.StatusInternalServerError
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return http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError
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}
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// sendHTTPError is a helper function for sending an http error response.
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func sendHTTPError(w http.ResponseWriter, err error) {
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msg, httpStatus := toHTTPError(err)
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http.Error(w, msg, httpStatus)
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}
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