355 lines
13 KiB
Go
355 lines
13 KiB
Go
package frp
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import (
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"bytes"
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"context"
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"crypto/sha256"
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"crypto/subtle"
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"crypto/tls"
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"crypto/x509"
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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"time"
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)
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// AgentClient 调用公网 VPS 上的 fonu-agent。凭据由调用方解密后只在内存中使用。
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type AgentClient struct {
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baseURL string
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token string
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pin string
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http *http.Client
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}
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func NewAgentClient(baseURL, token string) *AgentClient {
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return newAgentClient(baseURL, token, "")
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}
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func NewAgentClientWithPin(baseURL, token, pin string) *AgentClient {
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return newAgentClient(baseURL, token, pin)
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}
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func newAgentClient(baseURL, token, pin string) *AgentClient {
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client := &AgentClient{
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baseURL: strings.TrimRight(strings.TrimSpace(baseURL), "/"),
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token: token,
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pin: strings.ToLower(strings.TrimSpace(pin)),
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// 路由写入链路含 nginx -T 自省 + -t 校验 + reload（宝塔带 lua/waf 模块时各步可达数秒），15s 会超时
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http: &http.Client{Timeout: 60 * time.Second},
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}
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if client.pin != "" {
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client.http.Transport = &http.Transport{TLSClientConfig: pinTLSConfig(client.pin)}
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}
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return client
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}
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func pinTLSConfig(pin string) *tls.Config {
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return &tls.Config{
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MinVersion: tls.VersionTLS12,
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InsecureSkipVerify: true,
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VerifyPeerCertificate: func(rawCerts [][]byte, _ [][]*x509.Certificate) error {
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if len(rawCerts) == 0 {
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return fmt.Errorf("服务器未返回证书")
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}
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cert, err := x509.ParseCertificate(rawCerts[0])
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if err != nil {
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return err
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}
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now := time.Now()
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if now.Before(cert.NotBefore) || now.After(cert.NotAfter) {
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return fmt.Errorf("Agent HTTPS 证书不在有效期内")
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}
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sum := sha256.Sum256(rawCerts[0])
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got := hex.EncodeToString(sum[:])
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if subtle.ConstantTimeCompare([]byte(got), []byte(pin)) != 1 {
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return fmt.Errorf("Agent HTTPS 证书指纹不匹配")
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}
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return nil
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},
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}
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}
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func (c *AgentClient) request(ctx context.Context, method, path string, payload any, result any) error {
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if c.baseURL == "" || c.token == "" {
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return fmt.Errorf("公网 agent 未配置")
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}
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var body io.Reader
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if payload != nil {
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data, err := json.Marshal(payload)
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if err != nil {
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return err
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}
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body = bytes.NewReader(data)
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}
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req, err := http.NewRequestWithContext(ctx, method, c.baseURL+path, body)
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if err != nil {
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return err
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}
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req.Header.Set("Authorization", "Bearer "+c.token)
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if payload != nil {
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req.Header.Set("Content-Type", "application/json")
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}
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resp, err := c.http.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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data, err := io.ReadAll(io.LimitReader(resp.Body, 2<<20))
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if err != nil {
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return err
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}
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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return &statusError{code: resp.StatusCode, body: strings.TrimSpace(string(data))}
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}
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if result != nil && len(data) > 0 {
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if err := json.Unmarshal(data, result); err != nil {
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return fmt.Errorf("agent 响应格式无效: %w", err)
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}
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}
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return nil
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}
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func (c *AgentClient) Ping(ctx context.Context) error {
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return c.request(ctx, http.MethodGet, "/api/v1/ping", nil, nil)
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}
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func (c *AgentClient) ConfigureHTTPS(ctx context.Context, certPEM, keyPEM string, port int) error {
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var result map[string]any
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return c.request(ctx, http.MethodPut, "/api/v1/transport/https", map[string]any{
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"cert_pem": certPEM,
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"key_pem": keyPEM,
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"port": port,
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}, &result)
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}
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func (c *AgentClient) DisableHTTPS(ctx context.Context) error {
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var result map[string]any
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return c.request(ctx, http.MethodDelete, "/api/v1/transport/https", nil, &result)
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}
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func (c *AgentClient) Status(ctx context.Context) (map[string]any, error) {
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var result map[string]any
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err := c.request(ctx, http.MethodGet, "/api/v1/status", nil, &result)
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return result, err
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}
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// agentMinVersionInsights 是 P1 三个只读端点（metrics / logs / frps-config）要求的最低 agent 版本
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const agentMinVersionInsights = "0.11.0"
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// agentMinVersionRouteVersions 是域名 vhost 版本列表 / 对比 / 回滚端点要求的最低 agent 版本
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const agentMinVersionRouteVersions = "0.12.2"
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// ErrAgentEndpointMissing 表示 VPS 上的 agent 版本过旧、没有该端点（HTTP 404/405）
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var ErrAgentEndpointMissing = errors.New("VPS 上的 agent 版本过低，不支持该接口")
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// statusError 保留 HTTP 状态码，便于上层区分「端点不存在」与真实错误
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type statusError struct {
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code int
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body string
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}
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func (e *statusError) Error() string {
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return fmt.Sprintf("agent 返回 HTTP %d: %s", e.code, e.body)
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}
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// wrapEndpointMissing 把「端点不存在」统一成带升级提示的错误（按端点给出最低版本），其它错误原样返回
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func wrapEndpointMissing(err error, minVersion string) error {
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var statusErr *statusError
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if errors.As(err, &statusErr) && (statusErr.code == http.StatusNotFound || statusErr.code == http.StatusMethodNotAllowed) {
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return fmt.Errorf("%w（需 ≥ %s），请在服务端详情里升级 Agent", ErrAgentEndpointMissing, minVersion)
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}
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return err
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}
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// Metrics 采集 VPS 主机资源（CPU / 内存 / 磁盘 / 负载 / 运行时长）
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func (c *AgentClient) Metrics(ctx context.Context) (map[string]any, error) {
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var result map[string]any
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if err := c.request(ctx, http.MethodGet, "/api/v1/metrics", nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionInsights)
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}
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return result, nil
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}
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// NginxLogs 读取 VPS 上 Nginx 的 access / error 日志尾部
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func (c *AgentClient) NginxLogs(ctx context.Context, kind string, lines int) (map[string]any, error) {
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query := url.Values{}
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query.Set("type", kind)
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query.Set("lines", strconv.Itoa(lines))
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var result map[string]any
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if err := c.request(ctx, http.MethodGet, "/api/v1/logs/nginx?"+query.Encode(), nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionInsights)
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}
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return result, nil
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}
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// Certs 列出 VPS 证书目录下的域名与到期时间
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func (c *AgentClient) Certs(ctx context.Context) (map[string]any, error) {
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var result map[string]any
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if err := c.request(ctx, http.MethodGet, "/api/v1/certs", nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionInsights)
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}
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return result, nil
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}
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// NginxReload 显式校验并重载 Nginx，返回校验 / 重载结果与失败原因
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func (c *AgentClient) NginxReload(ctx context.Context) (map[string]any, error) {
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var result map[string]any
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if err := c.request(ctx, http.MethodPost, "/api/v1/nginx/reload", nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionInsights)
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}
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return result, nil
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}
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// FRPSConfig 回读 VPS 上的 frps.toml（用于与下发内容比对）
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func (c *AgentClient) FRPSConfig(ctx context.Context) (map[string]any, error) {
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var result map[string]any
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if err := c.request(ctx, http.MethodGet, "/api/v1/frps/config", nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionInsights)
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}
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return result, nil
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}
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func (c *AgentClient) SyncRoute(ctx context.Context, domain, upstream string, tls bool, certDir string) error {
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_, err := c.SyncRouteEx(ctx, domain, upstream, tls, certDir, false, 0, false, nil, "")
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return err
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}
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// RouteSpec 公网反代单域名部署参数（字段名与 agent routeRequest 的 JSON key 严格一致）。
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type RouteSpec struct {
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Domain, Upstream, CertDir string
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TLS, WebSocket, RedirectHTTPS bool
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HTTPSDisabled, SecurityHeaders bool
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TLS13Only bool
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VhostPort int
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AllowIPs, DenyIPs []string
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BasicAuthUser, BasicAuthPassword string
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ClientMaxBodySize, ProxyReadTimeout string
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RateLimitRate, RateLimitBurst, ConnLimitMax int
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ChinaOnly bool
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}
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// SyncRouteSpec 部署路由并要求回源自检；位置参数已到上限，新增选项一律走本方法。
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func (c *AgentClient) SyncRouteSpec(ctx context.Context, spec RouteSpec) (map[string]any, error) {
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var result map[string]any
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err := c.request(ctx, http.MethodPut, "/api/v1/routes", map[string]any{
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"domain": spec.Domain, "upstream": spec.Upstream, "tls": spec.TLS, "cert_dir": spec.CertDir,
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"websocket": spec.WebSocket, "vhost_port": spec.VhostPort,
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"redirect_https": spec.RedirectHTTPS, "allow_ips": spec.AllowIPs, "basic_auth_user": spec.BasicAuthUser,
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"deny_ips": spec.DenyIPs, "basic_auth_password": spec.BasicAuthPassword,
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"https_disabled": spec.HTTPSDisabled, "client_max_body_size": spec.ClientMaxBodySize,
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"proxy_read_timeout": spec.ProxyReadTimeout, "security_headers": spec.SecurityHeaders,
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"tls13_only": spec.TLS13Only,
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"rate_limit_rate": spec.RateLimitRate, "rate_limit_burst": spec.RateLimitBurst,
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"conn_limit_max": spec.ConnLimitMax, "china_only": spec.ChinaOnly,
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}, &result)
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return result, err
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}
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// InstallNginx 触发 VPS 上一键安装 Nginx（需 agent 以 root 运行）。
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func (c *AgentClient) InstallNginx(ctx context.Context) (map[string]any, error) {
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var result map[string]any
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err := c.request(ctx, http.MethodPost, "/api/v1/nginx/install", nil, &result)
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return result, err
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}
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// SyncChinaCIDR 把中国 IP 段（geo include 格式）下发到公网 agent。
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func (c *AgentClient) SyncChinaCIDR(ctx context.Context, content string) error {
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var result map[string]any
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return c.request(ctx, http.MethodPut, "/api/v1/china-cidr", map[string]any{"content": content}, &result)
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}
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// SyncRouteEx 保留的位置参数兼容包装（新代码请用 SyncRouteSpec）。
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func (c *AgentClient) SyncRouteEx(ctx context.Context, domain, upstream string, tls bool, certDir string, websocket bool, vhostPort int, redirectHTTPS bool, allowIPs []string, basicAuthUser string) (map[string]any, error) {
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return c.SyncRouteSpec(ctx, RouteSpec{
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Domain: domain, Upstream: upstream, TLS: tls, CertDir: certDir,
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WebSocket: websocket, VhostPort: vhostPort, RedirectHTTPS: redirectHTTPS,
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AllowIPs: allowIPs, BasicAuthUser: basicAuthUser,
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})
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}
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// RouteConf 返回指定域名当前反代配置内容。
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func (c *AgentClient) RouteConf(ctx context.Context, domain string) (string, error) {
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var result struct {
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Domain string `json:"domain"`
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Content string `json:"content"`
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}
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if err := c.request(ctx, http.MethodGet, "/api/v1/routes/"+domain+"/conf", nil, &result); err != nil {
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return "", err
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}
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return result.Content, nil
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}
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// RouteDetail 单条公网反代路由的真实状态。
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type RouteDetail struct {
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Domain string `json:"domain"`
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FileExists bool `json:"file_exists"`
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SyntaxOK bool `json:"syntax_ok"`
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Loaded bool `json:"loaded"`
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}
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// RoutesDetail 返回全部公网反代路由的状态明细（文件/语法/被 Nginx 加载）。
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func (c *AgentClient) RoutesDetail(ctx context.Context) ([]RouteDetail, error) {
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var result []RouteDetail
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err := c.request(ctx, http.MethodGet, "/api/v1/routes", nil, &result)
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return result, err
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}
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func (c *AgentClient) DeleteRoute(ctx context.Context, domain string) error {
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return c.request(ctx, http.MethodDelete, "/api/v1/routes/"+domain, nil, nil)
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}
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func (c *AgentClient) FRPSAction(ctx context.Context, action string) error {
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return c.request(ctx, http.MethodPost, "/api/v1/frps/action", map[string]string{"action": action}, nil)
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}
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func (c *AgentClient) InstallFRPS(ctx context.Context, version, proxy string) (map[string]any, error) {
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var result map[string]any
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err := c.request(ctx, http.MethodPost, "/api/v1/frps/install", map[string]string{"version": version, "proxy": proxy}, &result)
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return result, err
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}
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func (c *AgentClient) PushFRPSConfig(ctx context.Context, content string) error {
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return c.request(ctx, http.MethodPut, "/api/v1/frps/config", map[string]string{"content": content}, nil)
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}
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func (c *AgentClient) PushCertificate(ctx context.Context, domain, fullchain, privateKey string) error {
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return c.request(ctx, http.MethodPost, "/api/v1/certs", map[string]string{
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"domain": domain, "fullchain_pem": fullchain, "key_pem": privateKey,
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}, nil)
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}
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// RouteVersions 返回域名当前 vhost 内容与历史版本列表（需 agent ≥ 0.12.2）。
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func (c *AgentClient) RouteVersions(ctx context.Context, domain string) (map[string]any, error) {
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var result map[string]any
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if err := c.request(ctx, http.MethodGet, "/api/v1/routes/"+domain+"/versions", nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionRouteVersions)
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}
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return result, nil
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}
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// RouteVersion 读取某个历史版本的内容，供与当前 vhost 做差异对比。
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func (c *AgentClient) RouteVersion(ctx context.Context, domain, name string) (map[string]any, error) {
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var result map[string]any
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path := "/api/v1/routes/" + domain + "/versions/" + url.PathEscape(name)
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if err := c.request(ctx, http.MethodGet, path, nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionRouteVersions)
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}
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return result, nil
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}
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// RollbackRouteVersion 让 VPS 上的 vhost 回退到指定版本。
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func (c *AgentClient) RollbackRouteVersion(ctx context.Context, domain, name string) (map[string]any, error) {
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var result map[string]any
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path := "/api/v1/routes/" + domain + "/versions/" + url.PathEscape(name) + "/rollback"
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if err := c.request(ctx, http.MethodPost, path, nil, &result); err != nil {
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return nil, wrapEndpointMissing(err, agentMinVersionRouteVersions)
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}
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return result, nil
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}
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