| // Copyright 2018 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package ui |
| |
| import ( |
| "net/http" |
| |
| "go.chromium.org/luci/server/router" |
| "go.chromium.org/luci/server/templates" |
| ) |
| |
| // List of all possible error messages presented to the user. |
| var ( |
| uiErrNoJobOrNoPerm = presentableError{ |
| Status: http.StatusNotFound, |
| Message: "No such job or no permission to view it.", |
| ReloginMayHelp: true, |
| } |
| |
| uiErrBadInvocationID = presentableError{ |
| Status: http.StatusBadRequest, |
| Message: "Malformed invocation ID.", |
| ReloginMayHelp: false, |
| } |
| |
| uiErrNoInvocation = presentableError{ |
| Status: http.StatusNotFound, |
| Message: "The requested invocation is not found.", |
| ReloginMayHelp: false, |
| } |
| |
| uiErrActionForbidden = presentableError{ |
| Status: http.StatusForbidden, |
| Message: "No permission to execute the attempted action.", |
| ReloginMayHelp: true, |
| } |
| |
| uiErrCannotTriggerPausedJob = presentableError{ |
| Status: http.StatusConflict, |
| Message: "Cannot trigger a paused job. Resume it first.", |
| ReloginMayHelp: false, |
| } |
| ) |
| |
| // presentableError defines an error message we render as a pretty HTML page. |
| // |
| // All possible kinds of errors are instantiated above. |
| type presentableError struct { |
| Status int // HTTP status code |
| Message string // the main message on the page |
| ReloginMayHelp bool // if true, display a suggestion to login/relogin |
| } |
| |
| // render renders the HTML into the writer and sets the response code. |
| func (e *presentableError) render(c *router.Context) { |
| breadcrumps := []string{} |
| for _, k := range []string{"ProjectID", "JobName", "InvID"} { |
| p := c.Params.ByName(k) |
| if p == "" { |
| break |
| } |
| breadcrumps = append(breadcrumps, p) |
| } |
| c.Writer.Header().Set("Content-Type", "text/html; charset=utf-8") |
| c.Writer.WriteHeader(e.Status) |
| templates.MustRender(c.Request.Context(), c.Writer, "pages/error.html", map[string]any{ |
| "Breadcrumps": breadcrumps, |
| "LastCrumbIdx": len(breadcrumps) - 1, |
| "Message": e.Message, |
| "ReloginMayHelp": e.ReloginMayHelp, |
| }) |
| } |