mirror of
https://github.com/Rain-kl/OpenFlare.git
synced 2026-09-30 06:16:37 +08:00
ryan
403 lines
12 KiB
Go
403 lines
12 KiB
Go
package service
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import (
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"encoding/json"
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"errors"
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"net/url"
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"openflare/model"
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"regexp"
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"strings"
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)
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var proxyHeaderKeyPattern = regexp.MustCompile(`^[A-Za-z0-9_-]+$`)
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const (
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proxyRouteCachePolicyURL = "url"
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proxyRouteCachePolicySuffix = "suffix"
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proxyRouteCachePolicyPathPrefix = "path_prefix"
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proxyRouteCachePolicyPathExact = "path_exact"
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)
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type ProxyRouteCustomHeaderInput struct {
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Key string `json:"key"`
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Value string `json:"value"`
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}
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type ProxyRouteInput struct {
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Domain string `json:"domain"`
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OriginURL string `json:"origin_url"`
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OriginHost string `json:"origin_host"`
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Upstreams []string `json:"upstreams"`
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Enabled bool `json:"enabled"`
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EnableHTTPS bool `json:"enable_https"`
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CertID *uint `json:"cert_id"`
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RedirectHTTP bool `json:"redirect_http"`
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CacheEnabled bool `json:"cache_enabled"`
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CachePolicy string `json:"cache_policy"`
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CacheRules []string `json:"cache_rules"`
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CustomHeaders []ProxyRouteCustomHeaderInput `json:"custom_headers"`
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Remark string `json:"remark"`
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}
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func ListProxyRoutes() ([]*model.ProxyRoute, error) {
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return model.ListProxyRoutes()
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}
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func CreateProxyRoute(input ProxyRouteInput) (*model.ProxyRoute, error) {
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route, err := buildProxyRoute(nil, input)
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if err != nil {
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return nil, err
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}
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if err = route.Insert(); err != nil {
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if isUniqueConstraintError(err) {
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return nil, errors.New("域名已存在")
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}
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return nil, err
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}
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return route, nil
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}
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func UpdateProxyRoute(id uint, input ProxyRouteInput) (*model.ProxyRoute, error) {
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route, err := model.GetProxyRouteByID(id)
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if err != nil {
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return nil, err
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}
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route, err = buildProxyRoute(route, input)
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if err != nil {
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return nil, err
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}
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if err = route.Update(); err != nil {
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if isUniqueConstraintError(err) {
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return nil, errors.New("域名已存在")
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}
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return nil, err
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}
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return route, nil
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}
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func DeleteProxyRoute(id uint) error {
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route, err := model.GetProxyRouteByID(id)
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if err != nil {
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return err
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}
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return route.Delete()
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}
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func buildProxyRoute(route *model.ProxyRoute, input ProxyRouteInput) (*model.ProxyRoute, error) {
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domain := strings.ToLower(strings.TrimSpace(input.Domain))
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originURL := strings.TrimSpace(input.OriginURL)
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originHost := strings.TrimSpace(input.OriginHost)
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remark := strings.TrimSpace(input.Remark)
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upstreams, err := normalizeUpstreams(originURL, input.Upstreams)
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if err != nil {
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return nil, err
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}
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cachePolicy := strings.TrimSpace(input.CachePolicy)
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cacheRules, err := normalizeCacheRules(input.CacheEnabled, cachePolicy, input.CacheRules)
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if err != nil {
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return nil, err
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}
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customHeaders, err := normalizeCustomHeaders(input.CustomHeaders)
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if err != nil {
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return nil, err
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}
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cacheRulesJSON, err := json.Marshal(cacheRules)
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if err != nil {
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return nil, err
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}
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upstreamsJSON, err := json.Marshal(upstreams)
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if err != nil {
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return nil, err
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}
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customHeadersJSON, err := json.Marshal(customHeaders)
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if err != nil {
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return nil, err
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}
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if domain == "" {
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return nil, errors.New("域名不能为空")
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}
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if strings.Contains(domain, "://") || strings.Contains(domain, "/") {
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return nil, errors.New("域名格式不合法")
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}
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if err := validateOriginHost(originHost); err != nil {
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return nil, err
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}
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if !input.EnableHTTPS {
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input.RedirectHTTP = false
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input.CertID = nil
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}
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if input.EnableHTTPS {
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if input.CertID == nil || *input.CertID == 0 {
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return nil, errors.New("启用 HTTPS 时必须选择证书")
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}
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if _, err := model.GetTLSCertificateByID(*input.CertID); err != nil {
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return nil, errors.New("所选证书不存在")
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}
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}
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if input.RedirectHTTP && !input.EnableHTTPS {
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return nil, errors.New("仅启用 HTTPS 后才能开启 HTTP 重定向")
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}
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if route == nil {
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route = &model.ProxyRoute{}
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}
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route.Domain = domain
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route.OriginURL = upstreams[0]
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route.OriginHost = originHost
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route.Upstreams = string(upstreamsJSON)
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route.Enabled = input.Enabled
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route.EnableHTTPS = input.EnableHTTPS
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route.CertID = input.CertID
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route.RedirectHTTP = input.RedirectHTTP
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route.CacheEnabled = input.CacheEnabled
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route.CachePolicy = normalizeCachePolicy(input.CacheEnabled, cachePolicy)
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route.CacheRules = string(cacheRulesJSON)
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route.CustomHeaders = string(customHeadersJSON)
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route.Remark = remark
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return route, nil
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}
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func normalizeCustomHeaders(headers []ProxyRouteCustomHeaderInput) ([]ProxyRouteCustomHeaderInput, error) {
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if len(headers) == 0 {
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return []ProxyRouteCustomHeaderInput{}, nil
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}
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normalized := make([]ProxyRouteCustomHeaderInput, 0, len(headers))
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for _, header := range headers {
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key := strings.TrimSpace(header.Key)
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value := strings.TrimSpace(header.Value)
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if key == "" && value == "" {
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continue
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}
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if key == "" {
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return nil, errors.New("自定义请求头名称不能为空")
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}
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if !proxyHeaderKeyPattern.MatchString(key) {
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return nil, errors.New("自定义请求头名称格式不合法")
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}
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if strings.ContainsAny(key, "\r\n") || strings.ContainsAny(value, "\r\n") {
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return nil, errors.New("自定义请求头不能包含换行")
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}
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normalized = append(normalized, ProxyRouteCustomHeaderInput{
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Key: key,
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Value: value,
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})
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}
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return normalized, nil
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}
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func normalizeUpstreams(originURL string, upstreams []string) ([]string, error) {
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candidates := make([]string, 0, len(upstreams)+1)
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if strings.TrimSpace(originURL) != "" {
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candidates = append(candidates, originURL)
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}
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candidates = append(candidates, upstreams...)
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trimmed := make([]string, 0, len(candidates))
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for _, candidate := range candidates {
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item := strings.TrimSpace(candidate)
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if item == "" {
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continue
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}
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trimmed = append(trimmed, item)
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}
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unique := make([]string, 0, len(trimmed))
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seen := make(map[string]struct{}, len(trimmed))
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for _, item := range trimmed {
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if _, ok := seen[item]; ok {
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continue
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}
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seen[item] = struct{}{}
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unique = append(unique, item)
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}
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normalized := make([]string, 0, len(unique))
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var scheme string
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multiUpstream := len(unique) > 1
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for _, item := range unique {
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if err := validateOriginURL(item); err != nil {
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return nil, err
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}
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parsed, err := url.ParseRequestURI(item)
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if err != nil {
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return nil, errors.New("源站地址格式不合法")
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}
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if multiUpstream && parsed.Path != "" && parsed.Path != "/" {
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return nil, errors.New("多上游模式暂不支持带路径的源站地址")
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}
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if multiUpstream && parsed.RawQuery != "" {
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return nil, errors.New("多上游模式暂不支持带查询参数的源站地址")
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}
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if scheme == "" {
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scheme = parsed.Scheme
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} else if scheme != parsed.Scheme {
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return nil, errors.New("同一规则的多个上游必须使用相同协议")
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}
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normalized = append(normalized, item)
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}
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if len(normalized) == 0 {
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return nil, errors.New("至少填写一个上游地址")
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}
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return normalized, nil
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}
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func decodeStoredCustomHeaders(raw string) ([]ProxyRouteCustomHeaderInput, error) {
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text := strings.TrimSpace(raw)
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if text == "" {
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return []ProxyRouteCustomHeaderInput{}, nil
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}
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var headers []ProxyRouteCustomHeaderInput
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if err := json.Unmarshal([]byte(text), &headers); err != nil {
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return nil, errors.New("自定义请求头配置格式不合法")
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}
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return normalizeCustomHeaders(headers)
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}
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func normalizeCachePolicy(enabled bool, raw string) string {
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if !enabled {
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return ""
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}
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policy := strings.TrimSpace(raw)
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if policy == "" {
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return proxyRouteCachePolicyURL
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}
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return policy
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}
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func normalizeCacheRules(enabled bool, rawPolicy string, rules []string) ([]string, error) {
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if !enabled {
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return []string{}, nil
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}
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policy := normalizeCachePolicy(enabled, rawPolicy)
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switch policy {
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case proxyRouteCachePolicyURL:
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return []string{}, nil
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case proxyRouteCachePolicySuffix:
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return normalizeCacheSuffixRules(rules)
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case proxyRouteCachePolicyPathPrefix:
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return normalizeCachePathRules(rules, true)
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case proxyRouteCachePolicyPathExact:
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return normalizeCachePathRules(rules, false)
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default:
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return nil, errors.New("缓存策略不支持")
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}
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}
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func normalizeCacheSuffixRules(rules []string) ([]string, error) {
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normalized := make([]string, 0, len(rules))
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seen := make(map[string]struct{}, len(rules))
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for _, rule := range rules {
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item := strings.TrimSpace(strings.TrimPrefix(rule, "."))
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if item == "" {
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continue
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}
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if strings.ContainsAny(item, "/\\ \t\r\n") {
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return nil, errors.New("缓存后缀格式不合法")
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}
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if _, ok := seen[item]; ok {
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continue
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}
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seen[item] = struct{}{}
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normalized = append(normalized, item)
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}
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if len(normalized) == 0 {
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return nil, errors.New("按后缀缓存时至少填写一个后缀")
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}
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return normalized, nil
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}
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func normalizeCachePathRules(rules []string, allowPrefix bool) ([]string, error) {
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normalized := make([]string, 0, len(rules))
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seen := make(map[string]struct{}, len(rules))
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for _, rule := range rules {
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item := strings.TrimSpace(rule)
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if item == "" {
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continue
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}
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if !strings.HasPrefix(item, "/") || strings.Contains(item, "://") || strings.ContainsAny(item, " \t\r\n") {
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return nil, errors.New("缓存路径规则格式不合法")
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}
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if !allowPrefix && strings.HasSuffix(item, "/") && len(item) > 1 {
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item = strings.TrimRight(item, "/")
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}
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if _, ok := seen[item]; ok {
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continue
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}
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seen[item] = struct{}{}
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normalized = append(normalized, item)
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}
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if len(normalized) == 0 {
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if allowPrefix {
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return nil, errors.New("按路径前缀缓存时至少填写一个路径")
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}
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return nil, errors.New("按精确路径缓存时至少填写一个路径")
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}
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return normalized, nil
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}
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func decodeStoredCacheRules(raw string) ([]string, error) {
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text := strings.TrimSpace(raw)
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if text == "" {
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return []string{}, nil
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}
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var rules []string
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if err := json.Unmarshal([]byte(text), &rules); err != nil {
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return nil, errors.New("缓存规则格式不合法")
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}
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normalized := make([]string, 0, len(rules))
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for _, rule := range rules {
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item := strings.TrimSpace(rule)
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if item == "" {
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continue
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}
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normalized = append(normalized, item)
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}
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return normalized, nil
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}
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func decodeStoredUpstreams(raw string, fallbackOriginURL string) ([]string, error) {
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text := strings.TrimSpace(raw)
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if text == "" {
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return normalizeUpstreams(fallbackOriginURL, nil)
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}
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var upstreams []string
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if err := json.Unmarshal([]byte(text), &upstreams); err != nil {
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return nil, errors.New("上游配置格式不合法")
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}
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return normalizeUpstreams(fallbackOriginURL, upstreams)
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}
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func validateOriginURL(raw string) error {
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if raw == "" {
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return errors.New("源站地址不能为空")
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}
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parsed, err := url.ParseRequestURI(raw)
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if err != nil {
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return errors.New("源站地址格式不合法")
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}
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if parsed.Scheme != "http" && parsed.Scheme != "https" {
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return errors.New("源站地址必须以 http:// 或 https:// 开头")
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}
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if parsed.Host == "" {
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return errors.New("源站地址格式不合法")
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}
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return nil
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}
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func validateOriginHost(raw string) error {
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if raw == "" {
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return nil
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}
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if strings.ContainsAny(raw, "/\\ \t\r\n") || strings.Contains(raw, "://") {
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return errors.New("回源主机名格式不合法")
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}
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parsed, err := url.Parse("//" + raw)
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if err != nil || parsed.Host == "" || parsed.Host != raw {
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return errors.New("回源主机名格式不合法")
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}
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if parsed.Hostname() == "" {
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return errors.New("回源主机名格式不合法")
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}
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return nil
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}
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func isUniqueConstraintError(err error) bool {
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return err != nil && strings.Contains(strings.ToLower(err.Error()), "unique")
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}
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