feat: config, OpenAI-compatible streaming provider and safe tools

internal/config/config.go

@@ -0,0 +1,143 @@
+// Package config loads OpenClaw configuration from YAML/JSON files and env vars.
+package config
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+type LLM struct {
+	BaseURL     string  `yaml:"base_url" json:"base_url"`
+	APIKey      string  `yaml:"api_key" json:"api_key"`
+	Model       string  `yaml:"model" json:"model"`
+	TimeoutSec  int     `yaml:"timeout_sec" json:"timeout_sec"`
+	Temperature float64 `yaml:"temperature" json:"temperature"`
+}
+
+type Agent struct {
+	SystemPrompt  string `yaml:"system_prompt" json:"system_prompt"`
+	MaxIterations int    `yaml:"max_iterations" json:"max_iterations"`
+	HistoryLimit  int    `yaml:"history_limit" json:"history_limit"`
+}
+
+type WebFetch struct {
+	Enabled bool `yaml:"enabled" json:"enabled"`
+	// MaxBytes caps the response body read from remote servers.
+	MaxBytes   int64 `yaml:"max_bytes" json:"max_bytes"`
+	TimeoutSec int   `yaml:"timeout_sec" json:"timeout_sec"`
+	// AllowPrivate permits fetching loopback/private/link-local addresses (SSRF risk). Default false.
+	AllowPrivate bool `yaml:"allow_private" json:"allow_private"`
+}
+
+type Tools struct {
+	WebFetch WebFetch `yaml:"web_fetch" json:"web_fetch"`
+	// FilesEnabled enables read/write/list tools confined to the workspace directory.
+	FilesEnabled bool `yaml:"files_enabled" json:"files_enabled"`
+	// FileMaxBytes caps file reads/writes.
+	FileMaxBytes int64 `yaml:"file_max_bytes" json:"file_max_bytes"`
+}
+
+type Config struct {
+	Listen    string `yaml:"listen" json:"listen"`
+	AuthToken string `yaml:"auth_token" json:"auth_token"`
+	// AllowedOrigins for browser WebSocket/CORS. Empty = same host only. "*" must be set explicitly.
+	AllowedOrigins []string `yaml:"allowed_origins" json:"allowed_origins"`
+	DataDir        string   `yaml:"data_dir" json:"data_dir"`
+	Workspace      string   `yaml:"workspace" json:"workspace"`
+	LLM            LLM      `yaml:"llm" json:"llm"`
+	Agent          Agent    `yaml:"agent" json:"agent"`
+	Tools          Tools    `yaml:"tools" json:"tools"`
+}
+
+// Default returns a config with secure defaults.
+func Default() Config {
+	return Config{
+		Listen:  "127.0.0.1:8787",
+		DataDir: "./data",
+		LLM: LLM{
+			BaseURL:     "https://api.openai.com/v1",
+			Model:       "gpt-4o-mini",
+			TimeoutSec:  120,
+			Temperature: 0.7,
+		},
+		Agent: Agent{
+			SystemPrompt:  "You are OpenClaw, a concise and helpful self-hosted assistant. Use tools when they help.",
+			MaxIterations: 8,
+			HistoryLimit:  50,
+		},
+		Tools: Tools{
+			WebFetch:     WebFetch{Enabled: true, MaxBytes: 512 * 1024, TimeoutSec: 15},
+			FilesEnabled: true,
+			FileMaxBytes: 1 << 20,
+		},
+	}
+}
+
+// Load reads path (optional; .json or .yaml/.yml) on top of defaults, then applies env overrides.
+func Load(path string) (Config, error) {
+	cfg := Default()
+	if path != "" {
+		b, err := os.ReadFile(path)
+		if err != nil {
+			return cfg, fmt.Errorf("read config: %w", err)
+		}
+		switch strings.ToLower(filepath.Ext(path)) {
+		case ".json":
+			err = json.Unmarshal(b, &cfg)
+		default:
+			err = yaml.Unmarshal(b, &cfg)
+		}
+		if err != nil {
+			return cfg, fmt.Errorf("parse config: %w", err)
+		}
+	}
+	applyEnv(&cfg, os.Getenv)
+	if cfg.Workspace == "" {
+		cfg.Workspace = filepath.Join(cfg.DataDir, "workspace")
+	}
+	return cfg, cfg.Validate()
+}
+
+func applyEnv(c *Config, get func(string) string) {
+	set := func(key string, dst *string) {
+		if v := get(key); v != "" {
+			*dst = v
+		}
+	}
+	set("OPENCLAW_LISTEN", &c.Listen)
+	set("OPENCLAW_AUTH_TOKEN", &c.AuthToken)
+	set("OPENCLAW_DATA_DIR", &c.DataDir)
+	set("OPENCLAW_WORKSPACE", &c.Workspace)
+	set("OPENCLAW_LLM_BASE_URL", &c.LLM.BaseURL)
+	set("OPENCLAW_LLM_API_KEY", &c.LLM.APIKey)
+	set("OPENCLAW_LLM_MODEL", &c.LLM.Model)
+	if v := get("OPENCLAW_ALLOWED_ORIGINS"); v != "" {
+		c.AllowedOrigins = nil
+		for _, o := range strings.Split(v, ",") {
+			if o = strings.TrimSpace(o); o != "" {
+				c.AllowedOrigins = append(c.AllowedOrigins, o)
+			}
+		}
+	}
+}
+
+// Validate enforces required fields and secure settings.
+func (c Config) Validate() error {
+	var errs []error
+	if len(c.AuthToken) < 16 {
+		errs = append(errs, errors.New("auth_token must be set and at least 16 characters (OPENCLAW_AUTH_TOKEN)"))
+	}
+	if c.LLM.BaseURL == "" || c.LLM.Model == "" {
+		errs = append(errs, errors.New("llm.base_url and llm.model are required"))
+	}
+	if c.Agent.MaxIterations <= 0 {
+		errs = append(errs, errors.New("agent.max_iterations must be > 0"))
+	}
+	return errors.Join(errs...)
+}