Allow users to send access request messages via Discord #11
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package discord | ||
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| // ----------- // | ||
| // Channel API // | ||
| // ----------- // | ||
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| // https://discord.com/developers/docs/resources/channel#embed-object-embed-author-structure | ||
| type EmbedAuthor struct { | ||
| Name string `json:"name"` | ||
| IconURL string `json:"icon_url"` | ||
| } | ||
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| // https://discord.com/developers/docs/resources/channel#embed-object-embed-field-structure | ||
| type EmbedField struct { | ||
| Name string `json:"name"` | ||
| Value string `json:"value"` | ||
| Inline bool `json:"inline"` | ||
| } | ||
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| // https://discord.com/developers/docs/resources/channel#embed-object | ||
| type Embed struct { | ||
| Title string `json:"title"` | ||
| Color int `json:"color"` | ||
| Author EmbedAuthor `json:"author"` | ||
| Fields []EmbedField `json:"fields"` | ||
| } | ||
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| // ----------- // | ||
| // Webhook API // | ||
| // ----------- // | ||
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| // https://discord.com/developers/docs/resources/webhook#execute-webhook | ||
| type WebhookMessage struct { | ||
| Username string `json:"username"` | ||
| AvatarURL string `json:"avatar_url"` | ||
| Embeds []Embed `json:"embeds"` | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| package web | ||
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| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "net/http" | ||
| "strconv" | ||
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| "go.mkw.re/ghidra-panel/common" | ||
| "go.mkw.re/ghidra-panel/discord" | ||
| ) | ||
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| func (s *Server) handleRequestAccess(wr http.ResponseWriter, req *http.Request) { | ||
| if req.Method != http.MethodPost { | ||
| http.Error(wr, "Method not allowed", http.StatusMethodNotAllowed) | ||
| return | ||
| } | ||
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| ident, ok := s.checkAuth(req) | ||
| if !ok { | ||
| http.Error(wr, "Not authorized", http.StatusUnauthorized) | ||
| return | ||
| } | ||
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| if err := req.ParseForm(); err != nil { | ||
| http.Error(wr, "Bad request", http.StatusBadRequest) | ||
| return | ||
| } | ||
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| // TODO query ACL to ensure user account exists | ||
|
There was a problem hiding this comment. I don't understand this TODO comment ... If the username doesn't exist in the UserManager, we can just add them before authorizing. |
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| message := s.writeMessage(ident) | ||
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| // Send access request message | ||
| ctx := context.TODO() | ||
| payloadBuf, _ := json.Marshal(&message) | ||
| req, err := http.NewRequestWithContext(ctx, http.MethodPost, s.Config.DiscordWebhookURL, bytes.NewReader(payloadBuf)) | ||
| if err != nil { | ||
| http.Error(wr, "Internal server error", http.StatusInternalServerError) | ||
| return | ||
| } | ||
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| req.Header.Set("content-type", "application/json") | ||
| res, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| // TODO properly handle | ||
| http.Redirect(wr, req, "/?access_request=failure", http.StatusTemporaryRedirect) | ||
| return | ||
| } | ||
| defer res.Body.Close() | ||
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| http.Redirect(wr, req, "/?access_request=success", http.StatusTemporaryRedirect) | ||
| } | ||
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| func (s *Server) writeMessage(ident *common.Identity) discord.WebhookMessage { | ||
| embedAuthor := discord.EmbedAuthor{ | ||
| Name: ident.Username, | ||
| IconURL: fmt.Sprintf("https://cdn.discordapp.com/avatars/%d/%s.png", ident.ID, ident.AvatarHash), | ||
| } | ||
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| hostnameField := discord.EmbedField{ | ||
| Name: "Hostname", | ||
| Value: s.Config.GhidraEndpoint.Hostname, | ||
| Inline: true, | ||
| } | ||
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| portField := discord.EmbedField{ | ||
| Name: "Port", | ||
| Value: strconv.FormatUint(uint64(s.Config.GhidraEndpoint.Port), 10), | ||
| Inline: true, | ||
| } | ||
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| ghidraEmbed := discord.Embed{ | ||
| Title: fmt.Sprintf("%s has requested access to the following Ghidra server:", ident.Username), | ||
| Color: 0x77DD77, | ||
| Author: embedAuthor, | ||
| Fields: []discord.EmbedField{hostnameField, portField}, | ||
| } | ||
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| return discord.WebhookMessage{ | ||
| Username: "Panel", | ||
| AvatarURL: "", | ||
| Embeds: []discord.Embed{ghidraEmbed}, | ||
| } | ||
| } | ||
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Looks fine for now. I suggest putting user information in the SQLite database long term, so the JWT doesn't grow without bounds.