CrossRelay stage 0+1: Go gateway with Anthropic<->Chat Completions relay, Tauri shell, bilingual management UI
- Go gateway (stdlib only): /v1/messages non-stream + SSE, /v1/messages/count_tokens, management API /api/* (providers CRUD, apply/restore, settings, backups, logs) - Protocol conversion: Anthropic Messages <-> Chat Completions with a streaming state machine keyed by content block index (text, tool_use, parallel calls) - ~/.claude/settings.json guarded read/write: timestamped backups, managed env keys only, one-click restore - Tauri 2 shell: spawns the gateway sidecar, parses the random port from stdout, stdin pipe watchdog prevents orphans, kills the child on exit - React frontend: Dashboard/Providers/Settings, zh-CN + en-US, TanStack Query - Tests: Go table-driven + httptest integration (all green), vitest + RTL
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package gateway
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import (
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"fmt"
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"net/http"
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"time"
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"gitea.rutua.cn/kate522/CrossRelay/internal/claudecfg"
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"gitea.rutua.cn/kate522/CrossRelay/internal/config"
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)
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// providerInput is the provider payload accepted by the management API.
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type providerInput struct {
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Name string `json:"name"`
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Preset string `json:"preset"`
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BaseURL string `json:"base_url"`
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APIKey string `json:"api_key"`
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Models config.Models `json:"models"`
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}
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func (s *Server) handleStatus(w http.ResponseWriter, r *http.Request) {
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cfg := s.store.Config()
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var active any
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if p := s.store.ActiveClaude(); p != nil {
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active = map[string]any{
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"id": p.ID,
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"name": p.Name,
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"base_url": p.BaseURL,
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"models": p.Models,
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}
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}
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writeJSON(w, http.StatusOK, map[string]any{
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"running": true,
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"version": Version,
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"port": s.port,
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"uptime_sec": int(time.Since(s.started).Seconds()),
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"active_claude_provider": active,
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"stats": s.snapshotStats(),
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"language": cfg.Language,
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"port_mode": cfg.Gateway.PortMode,
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"fixed_port": cfg.Gateway.FixedPort,
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})
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}
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func (s *Server) handleListProviders(w http.ResponseWriter, r *http.Request) {
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writeJSON(w, http.StatusOK, map[string]any{"items": s.store.Config().Providers})
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}
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func (s *Server) handleCreateProvider(w http.ResponseWriter, r *http.Request) {
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var in providerInput
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if err := decodeJSON(r, &in, 1<<20); err != nil {
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writeAPIError(w, http.StatusBadRequest, "invalid request body: "+err.Error())
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return
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}
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p, err := s.store.AddProvider(in.Name, in.Preset, in.BaseURL, in.APIKey, in.Models)
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if err != nil {
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writeAPIError(w, http.StatusBadRequest, err.Error())
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return
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}
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writeJSON(w, http.StatusCreated, p)
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}
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func (s *Server) handleUpdateProvider(w http.ResponseWriter, r *http.Request) {
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id := r.PathValue("id")
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var in providerInput
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if err := decodeJSON(r, &in, 1<<20); err != nil {
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writeAPIError(w, http.StatusBadRequest, "invalid request body: "+err.Error())
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return
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}
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p, err := s.store.UpdateProvider(id, in.Name, in.Preset, in.BaseURL, in.APIKey, in.Models)
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if err != nil {
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writeAPIError(w, http.StatusBadRequest, err.Error())
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return
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}
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writeJSON(w, http.StatusOK, p)
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}
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func (s *Server) handleDeleteProvider(w http.ResponseWriter, r *http.Request) {
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id := r.PathValue("id")
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if err := s.store.DeleteProvider(id); err != nil {
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writeAPIError(w, http.StatusNotFound, err.Error())
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return
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}
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writeJSON(w, http.StatusOK, map[string]any{"deleted": id})
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}
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// handleApply activates a provider and writes it into Claude Code's
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// settings.json.
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func (s *Server) handleApply(w http.ResponseWriter, r *http.Request) {
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id := r.PathValue("id")
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p, err := s.store.ActivateClaude(id)
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if err != nil {
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writeAPIError(w, http.StatusNotFound, err.Error())
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return
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}
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mgr, err := s.claudeManager()
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if err != nil {
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writeAPIError(w, http.StatusInternalServerError, err.Error())
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return
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}
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settings, err := mgr.Apply(claudecfg.ApplyOptions{
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BaseURL: fmt.Sprintf("http://127.0.0.1:%d", s.port),
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Token: s.store.Config().RelayToken,
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Models: p.Models,
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})
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if err != nil {
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writeAPIError(w, http.StatusInternalServerError, err.Error())
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return
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}
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writeJSON(w, http.StatusOK, map[string]any{
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"provider": p,
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"env": settings.Env,
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})
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}
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// handleRestore puts back the most recent backup of settings.json.
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func (s *Server) handleRestore(w http.ResponseWriter, r *http.Request) {
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mgr, err := s.claudeManager()
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if err != nil {
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writeAPIError(w, http.StatusInternalServerError, err.Error())
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return
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}
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name, err := mgr.Restore()
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if err != nil {
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writeAPIError(w, http.StatusNotFound, err.Error())
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return
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}
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_ = s.store.ClearActiveClaude()
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writeJSON(w, http.StatusOK, map[string]any{"restored_from": name})
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}
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func (s *Server) handleBackups(w http.ResponseWriter, r *http.Request) {
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mgr, err := s.claudeManager()
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if err != nil {
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writeAPIError(w, http.StatusInternalServerError, err.Error())
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return
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}
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items, err := mgr.Backups()
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if err != nil {
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writeAPIError(w, http.StatusInternalServerError, err.Error())
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return
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}
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if items == nil {
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items = []claudecfg.BackupInfo{}
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}
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writeJSON(w, http.StatusOK, map[string]any{"items": items})
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}
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func (s *Server) handleGetSettings(w http.ResponseWriter, r *http.Request) {
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cfg := s.store.Config()
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writeJSON(w, http.StatusOK, map[string]any{
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"language": cfg.Language,
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"port_mode": cfg.Gateway.PortMode,
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"fixed_port": cfg.Gateway.FixedPort,
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})
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}
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type settingsInput struct {
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Language string `json:"language"`
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PortMode string `json:"port_mode"`
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FixedPort int `json:"fixed_port"`
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}
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func (s *Server) handleUpdateSettings(w http.ResponseWriter, r *http.Request) {
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var in settingsInput
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if err := decodeJSON(r, &in, 1<<20); err != nil {
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writeAPIError(w, http.StatusBadRequest, "invalid request body: "+err.Error())
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return
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}
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if in.Language != "" {
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if err := s.store.SetLanguage(in.Language); err != nil {
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writeAPIError(w, http.StatusBadRequest, err.Error())
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return
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}
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}
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if in.PortMode != "" {
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if err := s.store.SetGateway(config.Gateway{
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PortMode: in.PortMode,
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FixedPort: in.FixedPort,
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}); err != nil {
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writeAPIError(w, http.StatusBadRequest, err.Error())
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return
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}
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}
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cfg := s.store.Config()
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writeJSON(w, http.StatusOK, map[string]any{
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"language": cfg.Language,
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"port_mode": cfg.Gateway.PortMode,
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"fixed_port": cfg.Gateway.FixedPort,
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})
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}
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func (s *Server) handleLogs(w http.ResponseWriter, r *http.Request) {
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writeJSON(w, http.StatusOK, map[string]any{"items": s.logs.list()})
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}
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