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Ability to change log verbosity while the node is running (vechain#799)
* Replace slog.Level with slog.LevelVar * Add admin server to handle verbosity changes * Update Json logger with LevelVar * Add a GET and POST route * Fix Metrics and Admin docs * Fix grammar * Always use JSON responses * Revert Metrics docs changes * Update docs/hosting-a-node.md Co-authored-by: Darren Kelly <[email protected]> * Fix linter errors --------- Co-authored-by: Pedro Gomes <[email protected]> Co-authored-by: Darren Kelly <[email protected]>
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Aug 19, 2024
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| // Copyright (c) 2024 The VeChainThor developers | ||
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| // Distributed under the GNU Lesser General Public License v3.0 software license, see the accompanying | ||
| // file LICENSE or <https://www.gnu.org/licenses/lgpl-3.0.html> | ||
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| package admin | ||
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| import ( | ||
| "encoding/json" | ||
| "log/slog" | ||
| "net/http" | ||
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| "github.com/gorilla/handlers" | ||
| "github.com/gorilla/mux" | ||
| "github.com/vechain/thor/v2/log" | ||
| ) | ||
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| type logLevelRequest struct { | ||
| Level string `json:"level"` | ||
| } | ||
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| type logLevelResponse struct { | ||
| CurrentLevel string `json:"currentLevel"` | ||
| } | ||
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| type errorResponse struct { | ||
| ErrorCode int `json:"errorCode"` | ||
| ErrorMessage string `json:"errorMessage"` | ||
| } | ||
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| func writeError(w http.ResponseWriter, errCode int, errMsg string) { | ||
| w.Header().Set("Content-Type", "application/json") | ||
| w.WriteHeader(errCode) | ||
| json.NewEncoder(w).Encode(errorResponse{ | ||
| ErrorCode: errCode, | ||
| ErrorMessage: errMsg, | ||
| }) | ||
| } | ||
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| func getLogLevelHandler(logLevel *slog.LevelVar) http.HandlerFunc { | ||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| response := logLevelResponse{ | ||
| CurrentLevel: logLevel.Level().String(), | ||
| } | ||
| if err := json.NewEncoder(w).Encode(response); err != nil { | ||
| writeError(w, http.StatusInternalServerError, "Failed to encode response") | ||
| } | ||
| } | ||
| } | ||
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| func postLogLevelHandler(logLevel *slog.LevelVar) http.HandlerFunc { | ||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| var req logLevelRequest | ||
| if err := json.NewDecoder(r.Body).Decode(&req); err != nil { | ||
| writeError(w, http.StatusBadRequest, "Invalid request body") | ||
| return | ||
| } | ||
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| switch req.Level { | ||
| case "debug": | ||
| logLevel.Set(log.LevelDebug) | ||
| case "info": | ||
| logLevel.Set(log.LevelInfo) | ||
| case "warn": | ||
| logLevel.Set(log.LevelWarn) | ||
| case "error": | ||
| logLevel.Set(log.LevelError) | ||
| case "trace": | ||
| logLevel.Set(log.LevelTrace) | ||
| case "crit": | ||
| logLevel.Set(log.LevelCrit) | ||
| default: | ||
| writeError(w, http.StatusBadRequest, "Invalid verbosity level") | ||
| return | ||
| } | ||
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| w.Header().Set("Content-Type", "application/json") | ||
| response := logLevelResponse{ | ||
| CurrentLevel: logLevel.Level().String(), | ||
| } | ||
| w.WriteHeader(http.StatusOK) | ||
| json.NewEncoder(w).Encode(response) | ||
| } | ||
| } | ||
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| func logLevelHandler(logLevel *slog.LevelVar) http.HandlerFunc { | ||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| switch r.Method { | ||
| case http.MethodGet: | ||
| getLogLevelHandler(logLevel).ServeHTTP(w, r) | ||
| case http.MethodPost: | ||
| postLogLevelHandler(logLevel).ServeHTTP(w, r) | ||
| default: | ||
| writeError(w, http.StatusMethodNotAllowed, "method not allowed") | ||
| } | ||
| } | ||
| } | ||
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| func HTTPHandler(logLevel *slog.LevelVar) http.Handler { | ||
| router := mux.NewRouter() | ||
| router.HandleFunc("/admin/loglevel", logLevelHandler(logLevel)) | ||
| return handlers.CompressHandler(router) | ||
| } |
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