mirror of
https://github.com/Rain-kl/OpenFlare.git
synced 2026-09-29 14:06:36 +08:00
ryan
753 lines
31 KiB
Go
753 lines
31 KiB
Go
package openresty
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import (
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"crypto/sha256"
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"crypto/x509"
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"encoding/base64"
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"encoding/hex"
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"encoding/json"
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"encoding/pem"
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"errors"
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"fmt"
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"net/url"
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"regexp"
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"sort"
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"strings"
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)
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func RenderJSON(sourceJSON string, certificateFiles []SupportFile) (*Result, error) {
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var doc Document
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if err := json.Unmarshal([]byte(strings.TrimSpace(sourceJSON)), &doc); err != nil {
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return nil, fmt.Errorf("openresty source config json is invalid: %w", err)
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}
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return Render(doc, certificateFiles)
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}
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func Render(doc Document, certificateFiles []SupportFile) (*Result, error) {
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mainConfig := RenderMainConfig(doc.OpenRestyConfig)
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routeConfig, err := RenderRouteConfig(doc, certificateFiles)
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if err != nil {
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return nil, err
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}
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wafConfig, err := RenderWAFConfig(doc.WAF)
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if err != nil {
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return nil, err
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}
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powConfig, err := RenderPoWConfig(doc)
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if err != nil {
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return nil, err
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}
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files := append([]SupportFile(nil), certificateFiles...)
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files = append(files, SupportFile{Path: "pow_config.json", Content: powConfig})
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files = append(files, SupportFile{Path: "waf_config.json", Content: wafConfig})
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files = DedupeSupportFiles(files)
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return &Result{
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MainConfig: mainConfig,
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RouteConfig: routeConfig,
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SupportFiles: files,
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Checksum: ChecksumBundle(mainConfig, routeConfig, files),
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}, nil
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}
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func RenderMainConfig(cfg ConfigSnapshot) string {
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templateText := cfg.MainConfigTemplate
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if strings.TrimSpace(templateText) == "" {
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templateText = defaultMainConfigTemplate
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}
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return renderMainConfigTemplate(templateText, cfg)
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}
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func ValidateMainConfigTemplate(templateText string) error {
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trimmed := strings.TrimSpace(templateText)
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if trimmed == "" {
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return errors.New("OpenRestyMainConfigTemplate 不能为空")
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}
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for _, placeholder := range requiredMainConfigTemplatePlaceholders {
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if !strings.Contains(trimmed, placeholder) {
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return fmt.Errorf("OpenRestyMainConfigTemplate 必须保留占位符 %s", placeholder)
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}
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}
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return nil
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}
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func RenderRouteConfig(doc Document, certificateFiles []SupportFile) (string, error) {
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var builder strings.Builder
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builder.WriteString("# This file is generated by OpenFlare. Do not edit manually.\n")
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certificates := certificatesByID(certificateFiles)
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for _, route := range doc.Routes {
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domains := normalizedRouteDomains(route)
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if len(domains) == 0 {
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return "", fmt.Errorf("route %s domains are invalid", route.Domain)
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}
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serverNames := renderServerNames(domains)
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displayName := strings.TrimSpace(route.SiteName)
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if displayName == "" {
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displayName = domains[0]
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}
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upstreams := route.Upstreams
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if len(upstreams) == 0 && strings.TrimSpace(route.OriginURL) != "" {
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upstreams = []string{route.OriginURL}
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}
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upstreamConfig := buildRouteUpstreamConfig(route, upstreams)
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if upstreamConfig.UsesNamedUpstream {
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builder.WriteString(renderNamedUpstreamBlock(upstreamConfig))
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}
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cacheConfig := routeCacheConfig{Enabled: route.CacheEnabled, Policy: route.CachePolicy, Rules: route.CacheRules}
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limitConfig := routeLimitConfig{LimitConnPerServer: route.LimitConnPerServer, LimitConnPerIP: route.LimitConnPerIP, LimitRate: route.LimitRate}
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powEnabled, _ := getPoWConfigForRoute(route.ID, doc.WAF)
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if route.PoWEnabled {
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powEnabled = true
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}
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if !route.EnableHTTPS {
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builder.WriteString(renderHTTPProxyServer(serverNames, displayName, route.OriginURL, route.OriginHost, route.CustomHeaders, cacheConfig, limitConfig, upstreamConfig, powEnabled, route.BasicAuthEnabled, route.BasicAuthUsername, route.BasicAuthPassword, doc.OpenRestyConfig))
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continue
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}
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certIDs := normalizeCertIDs(route.CertID, route.CertIDs)
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domainCertIDs := normalizeDomainCertIDs(domains, certIDs, route.DomainCertIDs)
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if len(certIDs) == 0 {
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return "", fmt.Errorf("路由 %s 未配置证书", route.Domain)
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}
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httpOnlyDomains := make([]string, 0, len(domains))
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domainsByCertID := make(map[uint][]string, len(certIDs))
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for index, domain := range domains {
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if index >= len(domainCertIDs) || domainCertIDs[index] == 0 {
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httpOnlyDomains = append(httpOnlyDomains, domain)
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continue
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}
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domainsByCertID[domainCertIDs[index]] = append(domainsByCertID[domainCertIDs[index]], domain)
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}
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for _, certID := range certIDs {
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assignedDomains := domainsByCertID[certID]
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if len(assignedDomains) == 0 {
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continue
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}
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certPEM, ok := certificates[certID]
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if !ok {
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return "", fmt.Errorf("route %s certificate %d does not exist", route.Domain, certID)
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}
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if err := validateCertificateCoverage(certPEM, assignedDomains); err != nil {
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return "", fmt.Errorf("site %s certificate validation failed: %w", displayName, err)
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}
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}
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if route.RedirectHTTP {
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if len(httpOnlyDomains) > 0 {
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builder.WriteString(renderHTTPProxyServer(renderServerNames(httpOnlyDomains), displayName, route.OriginURL, route.OriginHost, route.CustomHeaders, cacheConfig, limitConfig, upstreamConfig, powEnabled, route.BasicAuthEnabled, route.BasicAuthUsername, route.BasicAuthPassword, doc.OpenRestyConfig))
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}
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for _, certID := range certIDs {
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if assignedDomains := domainsByCertID[certID]; len(assignedDomains) > 0 {
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builder.WriteString(renderHTTPRedirectServer(renderServerNames(assignedDomains)))
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}
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}
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} else {
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builder.WriteString(renderHTTPProxyServer(serverNames, displayName, route.OriginURL, route.OriginHost, route.CustomHeaders, cacheConfig, limitConfig, upstreamConfig, powEnabled, route.BasicAuthEnabled, route.BasicAuthUsername, route.BasicAuthPassword, doc.OpenRestyConfig))
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}
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for _, certID := range certIDs {
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if assignedDomains := domainsByCertID[certID]; len(assignedDomains) > 0 {
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builder.WriteString(renderHTTPSServer(renderServerNames(assignedDomains), displayName, route.OriginURL, route.OriginHost, certID, route.CustomHeaders, cacheConfig, limitConfig, upstreamConfig, powEnabled, route.BasicAuthEnabled, route.BasicAuthUsername, route.BasicAuthPassword, doc.OpenRestyConfig))
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}
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}
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}
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return builder.String(), nil
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}
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func RenderPoWConfig(doc Document) (string, error) {
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type domainEntry struct {
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Domains []string `json:"domains"`
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Enabled bool `json:"enabled"`
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Config *PoWConfig `json:"config"`
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}
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entries := make([]domainEntry, 0)
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for _, route := range doc.Routes {
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powEnabled, powConfig := getPoWConfigForRoute(route.ID, doc.WAF)
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if route.PoWEnabled {
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powEnabled = true
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if route.PoWConfig != nil {
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powConfig = route.PoWConfig
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}
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}
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if !powEnabled {
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continue
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}
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entries = append(entries, domainEntry{Domains: normalizedRouteDomains(route), Enabled: true, Config: powConfig})
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}
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if len(entries) == 0 {
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return "{}", nil
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}
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data, err := json.Marshal(entries)
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return string(data), err
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}
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func RenderWAFConfig(snapshot WAFDocument) (string, error) {
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type wafRuntimeRuleGroup struct {
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ID uint `json:"id"`
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Name string `json:"name"`
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IsGlobal bool `json:"is_global"`
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BlockStatusCode int `json:"block_status_code"`
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BlockResponseBody string `json:"block_response_body"`
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IPWhitelist []string `json:"ip_whitelist"`
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IPBlacklist []string `json:"ip_blacklist"`
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CountryWhitelist []string `json:"country_whitelist"`
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CountryBlacklist []string `json:"country_blacklist"`
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RegionWhitelist []string `json:"region_whitelist"`
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RegionBlacklist []string `json:"region_blacklist"`
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}
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type wafRuntimeConfig struct {
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DefaultBlockStatusCode int `json:"default_block_status_code"`
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RuleGroups []wafRuntimeRuleGroup `json:"rule_groups"`
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SiteRuleGroups map[string][]uint `json:"site_rule_groups"`
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}
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groups := make([]wafRuntimeRuleGroup, 0, len(snapshot.RuleGroups))
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globalGroupIDs := make([]uint, 0)
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enabledGroupIDs := make(map[uint]struct{}, len(snapshot.RuleGroups))
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for _, group := range snapshot.RuleGroups {
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if !group.Enabled {
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continue
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}
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statusCode := group.BlockStatusCode
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if statusCode == 0 {
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statusCode = defaultWAFBlockStatus
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}
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if group.IsGlobal {
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globalGroupIDs = append(globalGroupIDs, group.ID)
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}
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enabledGroupIDs[group.ID] = struct{}{}
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groups = append(groups, wafRuntimeRuleGroup{ID: group.ID, Name: group.Name, IsGlobal: group.IsGlobal, BlockStatusCode: statusCode, BlockResponseBody: group.BlockResponseBody, IPWhitelist: group.IPWhitelist, IPBlacklist: group.IPBlacklist, CountryWhitelist: group.CountryWhitelist, CountryBlacklist: group.CountryBlacklist, RegionWhitelist: group.RegionWhitelist, RegionBlacklist: group.RegionBlacklist})
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}
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sort.Slice(groups, func(i, j int) bool {
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if groups[i].IsGlobal != groups[j].IsGlobal {
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return groups[i].IsGlobal
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}
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return groups[i].ID < groups[j].ID
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})
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sort.Slice(globalGroupIDs, func(i, j int) bool { return globalGroupIDs[i] < globalGroupIDs[j] })
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siteRuleGroups := make(map[string][]uint, len(snapshot.Bindings))
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for _, binding := range snapshot.Bindings {
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ids := append([]uint{}, globalGroupIDs...)
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for _, id := range binding.RuleGroupIDs {
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if _, ok := enabledGroupIDs[id]; ok {
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ids = append(ids, id)
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}
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}
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siteRuleGroups[binding.SiteName] = uniqueUintIDs(ids)
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}
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data, err := json.Marshal(wafRuntimeConfig{DefaultBlockStatusCode: defaultWAFBlockStatus, RuleGroups: groups, SiteRuleGroups: siteRuleGroups})
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return string(data), err
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}
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func ChecksumBundle(mainConfig string, routeConfig string, supportFiles []SupportFile) string {
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var builder strings.Builder
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builder.WriteString(mainConfig)
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builder.WriteString("\n--route-config--\n")
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builder.WriteString(routeConfig)
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builder.WriteString("\n--support-files--\n")
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files := DedupeSupportFiles(supportFiles)
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sort.Slice(files, func(i int, j int) bool { return files[i].Path < files[j].Path })
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for _, file := range files {
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if file.Path == SourceConfigFileName {
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continue
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}
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builder.WriteString(file.Path)
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builder.WriteString("\n")
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builder.WriteString(file.Content)
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builder.WriteString("\n")
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}
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sum := sha256.Sum256([]byte(builder.String()))
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return hex.EncodeToString(sum[:])
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}
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func DedupeSupportFiles(files []SupportFile) []SupportFile {
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if len(files) == 0 {
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return nil
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}
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unique := make(map[string]SupportFile, len(files))
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for _, file := range files {
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unique[file.Path] = file
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}
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result := make([]SupportFile, 0, len(unique))
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for _, file := range unique {
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result = append(result, file)
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}
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return result
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}
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func renderMainConfigTemplate(templateText string, cfg ConfigSnapshot) string {
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replacer := strings.NewReplacer(
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"{{OpenRestyWorkerProcesses}}", cfg.WorkerProcesses,
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"{{OpenRestyWorkerConnections}}", fmt.Sprintf("%d", cfg.WorkerConnections),
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"{{OpenRestyWorkerRlimitNofile}}", fmt.Sprintf("%d", cfg.WorkerRlimitNofile),
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"{{OpenRestyConnectionUpgradeMap}}", renderConnectionUpgradeMap(),
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"{{OpenRestyDefaultServerBlock}}", renderDefaultServerBlock(),
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"{{OpenRestyAccessLogPath}}", AccessLogPlaceholder,
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"{{OpenRestyErrorLogPath}}", ErrorLogPlaceholder,
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"{{OpenRestyEventsUseDirective}}", renderTemplateDirective(cfg.EventsUse != "", fmt.Sprintf("use %s;", cfg.EventsUse)),
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"{{OpenRestyEventsMultiAcceptDirective}}", renderTemplateDirective(cfg.EventsMultiAcceptEnabled, "multi_accept on;"),
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"{{OpenRestyKeepaliveTimeout}}", fmt.Sprintf("%d", cfg.KeepaliveTimeout),
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"{{OpenRestyKeepaliveRequests}}", fmt.Sprintf("%d", cfg.KeepaliveRequests),
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"{{OpenRestyClientHeaderTimeout}}", fmt.Sprintf("%d", cfg.ClientHeaderTimeout),
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"{{OpenRestyClientBodyTimeout}}", fmt.Sprintf("%d", cfg.ClientBodyTimeout),
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"{{OpenRestyClientMaxBodySize}}", cfg.ClientMaxBodySize,
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"{{OpenRestyLargeClientHeaderBuffers}}", cfg.LargeClientHeaderBuffers,
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"{{OpenRestySendTimeout}}", fmt.Sprintf("%d", cfg.SendTimeout),
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"{{OpenRestyProxyConnectTimeout}}", fmt.Sprintf("%d", cfg.ProxyConnectTimeout),
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"{{OpenRestyProxySendTimeout}}", fmt.Sprintf("%d", cfg.ProxySendTimeout),
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"{{OpenRestyProxyReadTimeout}}", fmt.Sprintf("%d", cfg.ProxyReadTimeout),
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"{{OpenRestyProxyRequestBuffering}}", onOff(cfg.ProxyRequestBuffering),
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"{{OpenRestyProxyBuffering}}", onOff(cfg.ProxyBufferingEnabled),
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"{{OpenRestyProxyBuffers}}", cfg.ProxyBuffers,
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"{{OpenRestyProxyBufferSize}}", cfg.ProxyBufferSize,
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"{{OpenRestyProxyBusyBuffersSize}}", cfg.ProxyBusyBuffersSize,
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"{{OpenRestyGzip}}", onOff(cfg.GzipEnabled),
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"{{OpenRestyGzipMinLength}}", fmt.Sprintf("%d", cfg.GzipMinLength),
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"{{OpenRestyGzipCompLevel}}", fmt.Sprintf("%d", cfg.GzipCompLevel),
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"{{OpenRestyResolverDirective}}", renderTemplateDirective(cfg.Resolvers != "", fmt.Sprintf("resolver %s;", cfg.Resolvers)),
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"{{OpenRestyCacheBlock}}", renderOpenRestyCacheTemplateBlock(cfg),
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"{{OpenRestyRouteConfigInclude}}", RouteConfigPlaceholder,
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)
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return replacer.Replace(templateText)
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}
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func renderTemplateDirective(enabled bool, statement string) string {
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if !enabled {
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return ""
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}
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return fmt.Sprintf(" %s\n", statement)
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}
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func renderOpenRestyCacheTemplateBlock(cfg ConfigSnapshot) string {
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lines := []string{renderOpenRestyLimitZoneBlock()}
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if !cfg.CacheEnabled {
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lines = append(lines, renderOpenRestyObservabilityTemplateBlock())
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return strings.Join(lines, "")
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}
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lines = append(lines, strings.Join([]string{
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fmt.Sprintf(" proxy_cache_path %s levels=%s keys_zone=openflare_cache:10m inactive=%s max_size=%s;", cfg.CachePath, cfg.CacheLevels, cfg.CacheInactive, cfg.CacheMaxSize),
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fmt.Sprintf(" proxy_cache_key \"%s\";", cfg.CacheKeyTemplate),
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fmt.Sprintf(" proxy_cache_lock %s;", onOff(cfg.CacheLockEnabled)),
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fmt.Sprintf(" proxy_cache_lock_timeout %s;", cfg.CacheLockTimeout),
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fmt.Sprintf(" proxy_cache_use_stale %s;", cfg.CacheUseStale),
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"",
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}, "\n"))
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lines = append(lines, renderOpenRestyObservabilityTemplateBlock())
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return strings.Join(lines, "")
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}
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func renderOpenRestyLimitZoneBlock() string {
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return " limit_conn_zone $server_name zone=openflare_conn_per_server:10m;\n limit_conn_zone $binary_remote_addr zone=openflare_conn_per_ip:10m;\n"
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}
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func renderOpenRestyObservabilityTemplateBlock() string {
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return fmt.Sprintf(" lua_shared_dict openflare_observability 10m;\n lua_shared_dict openflare_pow_challenges 10m;\n lua_shared_dict openflare_pow_sessions 10m;\n lua_shared_dict openflare_pow_config 1m;\n lua_shared_dict openflare_waf_config 1m;\n init_worker_by_lua_file %s/observability/init.lua;\n log_by_lua_file %s/observability/log.lua;\n\n server {\n listen %s;\n server_name openflare-observability;\n access_log off;\n\n location = /openflare/stub_status {\n stub_status;\n }\n\n location = /openflare/observability {\n default_type application/json;\n content_by_lua_file %s/observability/read.lua;\n }\n }\n\n", LuaDirPlaceholder, LuaDirPlaceholder, ObservabilityListenPlaceholder, LuaDirPlaceholder)
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}
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func renderHTTPProxyServer(serverNames string, siteName string, originURL string, originHost string, customHeaders []CustomHeader, cacheConfig routeCacheConfig, limitConfig routeLimitConfig, upstreamConfig routeUpstreamConfig, powEnabled bool, basicAuthEnabled bool, basicAuthUsername string, basicAuthPassword string, cfg ConfigSnapshot) string {
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return fmt.Sprintf("server {\n listen 80;\n server_name %s;\n%s%s location / {\n%s%s%s%s%s }\n%s}\n\n", serverNames, renderAccessBlock(siteName, powEnabled), renderPowLocationBlocks(powEnabled), renderBasicAuthBlock(basicAuthEnabled, basicAuthUsername, basicAuthPassword), renderProxyHeaderBlock(originURL, originHost, customHeaders, upstreamConfig, cfg), renderRouteLimitBlock(limitConfig), renderRouteCacheBlock(cacheConfig, cfg), renderProxyPassBlock(originURL, upstreamConfig), renderPowStaticLocationBlock(powEnabled))
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}
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func renderHTTPRedirectServer(serverNames string) string {
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return fmt.Sprintf("server {\n listen 80;\n server_name %s;\n\n return 301 https://$host$request_uri;\n}\n\n", serverNames)
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}
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func renderHTTPSServer(serverNames string, siteName string, originURL string, originHost string, certificateID uint, customHeaders []CustomHeader, cacheConfig routeCacheConfig, limitConfig routeLimitConfig, upstreamConfig routeUpstreamConfig, powEnabled bool, basicAuthEnabled bool, basicAuthUsername string, basicAuthPassword string, cfg ConfigSnapshot) string {
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certPath := fmt.Sprintf("%s/%d.crt", CertDirPlaceholder, certificateID)
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keyPath := fmt.Sprintf("%s/%d.key", CertDirPlaceholder, certificateID)
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return fmt.Sprintf("server {\n listen 443 ssl;\n http2 on;\n server_name %s;\n ssl_certificate %s;\n ssl_certificate_key %s;\n%s%s location / {\n%s%s%s%s%s }\n%s}\n\n", serverNames, certPath, keyPath, renderAccessBlock(siteName, powEnabled), renderPowLocationBlocks(powEnabled), renderBasicAuthBlock(basicAuthEnabled, basicAuthUsername, basicAuthPassword), renderProxyHeaderBlock(originURL, originHost, customHeaders, upstreamConfig, cfg), renderRouteLimitBlock(limitConfig), renderRouteCacheBlock(cacheConfig, cfg), renderProxyPassBlock(originURL, upstreamConfig), renderPowStaticLocationBlock(powEnabled))
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}
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func renderProxyHeaderBlock(originURL string, originHost string, customHeaders []CustomHeader, upstreamConfig routeUpstreamConfig, cfg ConfigSnapshot) string {
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var builder strings.Builder
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if strings.TrimSpace(originHost) != "" {
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builder.WriteString(fmt.Sprintf(" proxy_set_header Host %s;\n", quoteNginxStringLiteral(originHost)))
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} else {
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builder.WriteString(" proxy_set_header Host $host;\n")
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}
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if upstreamServerName := resolveUpstreamServerName(originURL, originHost); upstreamServerName != "" {
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builder.WriteString(" proxy_ssl_server_name on;\n")
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builder.WriteString(fmt.Sprintf(" proxy_ssl_name %s;\n", quoteNginxStringLiteral(upstreamServerName)))
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}
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builder.WriteString(" proxy_set_header X-Real-IP $remote_addr;\n")
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builder.WriteString(" proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;\n")
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builder.WriteString(" proxy_set_header X-Forwarded-Proto $scheme;\n")
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if cfg.WebsocketEnabled {
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builder.WriteString(" proxy_http_version 1.1;\n")
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builder.WriteString(" proxy_set_header Connection $connection_upgrade;\n")
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builder.WriteString(" proxy_set_header Upgrade $http_upgrade;\n")
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} else if upstreamConfig.UsesNamedUpstream {
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builder.WriteString(" proxy_http_version 1.1;\n")
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builder.WriteString(" proxy_set_header Connection \"\";\n")
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}
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for _, header := range customHeaders {
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builder.WriteString(fmt.Sprintf(" proxy_set_header %s %s;\n", header.Key, quoteNginxStringLiteral(header.Value)))
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}
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return builder.String()
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}
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func renderAccessBlock(siteName string, powEnabled bool) string {
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escapedSiteName := escapeNginxString(siteName)
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if !powEnabled {
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return fmt.Sprintf(" set $openflare_waf_site \"%s\";\n access_by_lua_file %s/waf/check.lua;\n", escapedSiteName, LuaDirPlaceholder)
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}
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return fmt.Sprintf(` set $openflare_waf_site "%s";
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access_by_lua_block {
|
|
if not string.find(package.path, "%s/?.lua", 1, true) then
|
|
package.path = "%s/?.lua;%s/?/init.lua;" .. package.path
|
|
end
|
|
require("waf.runtime").check()
|
|
if ngx.ctx.openflare_waf_blocked then
|
|
return
|
|
end
|
|
require("pow.runtime").check()
|
|
}
|
|
`, escapedSiteName, LuaDirPlaceholder, LuaDirPlaceholder, LuaDirPlaceholder)
|
|
}
|
|
|
|
func renderBasicAuthBlock(enabled bool, username, password string) string {
|
|
if !enabled || username == "" || password == "" {
|
|
return ""
|
|
}
|
|
encoded := base64.StdEncoding.EncodeToString([]byte(username + ":" + password))
|
|
return fmt.Sprintf(" rewrite_by_lua_block {\n local auth = ngx.var.http_authorization\n if auth ~= \"Basic %s\" then\n ngx.header[\"WWW-Authenticate\"] = 'Basic realm=\"Restricted\"'\n return ngx.exit(401)\n end\n }\n", encoded)
|
|
}
|
|
|
|
func renderPowLocationBlocks(powEnabled bool) string {
|
|
if !powEnabled {
|
|
return ""
|
|
}
|
|
return fmt.Sprintf("\n location = %spass-challenge {\n content_by_lua_file %s/pow/verify.lua;\n }\n\n location = %smake-challenge {\n content_by_lua_file %s/pow/challenge.lua;\n }\n\n", anubisAPIPrefix, LuaDirPlaceholder, anubisAPIPrefix, LuaDirPlaceholder)
|
|
}
|
|
|
|
func renderPowStaticLocationBlock(powEnabled bool) string {
|
|
if !powEnabled {
|
|
return ""
|
|
}
|
|
return fmt.Sprintf(" location %s {\n alias %s/;\n types {\n text/css css;\n application/javascript js mjs;\n application/json json;\n image/webp webp;\n font/woff2 woff2;\n }\n }\n\n", anubisStaticPrefix, PowStaticDirPlaceholder)
|
|
}
|
|
|
|
func renderRouteCacheBlock(cacheConfig routeCacheConfig, cfg ConfigSnapshot) string {
|
|
if !cfg.CacheEnabled || !cacheConfig.Enabled {
|
|
return ""
|
|
}
|
|
var builder strings.Builder
|
|
builder.WriteString(" set $openflare_skip_cache 0;\n")
|
|
builder.WriteString(" if ($request_method != GET) {\n set $openflare_skip_cache 1;\n }\n")
|
|
builder.WriteString(" if ($http_authorization != \"\") {\n set $openflare_skip_cache 1;\n }\n")
|
|
builder.WriteString(" if ($http_cookie ~* \"(session|sess|token|auth|jwt|logged_in|remember|laravel_session|connect\\\\.sid|_session)\") {\n set $openflare_skip_cache 1;\n }\n")
|
|
builder.WriteString(" if ($http_cache_control ~* \"(no-cache|no-store|private)\") {\n set $openflare_skip_cache 1;\n }\n")
|
|
if condition := renderRouteCachePolicyCondition(cacheConfig); condition != "" {
|
|
builder.WriteString(condition)
|
|
}
|
|
builder.WriteString(" proxy_cache openflare_cache;\n")
|
|
builder.WriteString(" proxy_cache_methods GET;\n")
|
|
builder.WriteString(" proxy_cache_bypass $openflare_skip_cache;\n")
|
|
builder.WriteString(" proxy_no_cache $openflare_skip_cache;\n")
|
|
return builder.String()
|
|
}
|
|
|
|
func renderRouteLimitBlock(limitConfig routeLimitConfig) string {
|
|
var builder strings.Builder
|
|
if limitConfig.LimitConnPerServer > 0 {
|
|
builder.WriteString(fmt.Sprintf(" limit_conn openflare_conn_per_server %d;\n", limitConfig.LimitConnPerServer))
|
|
}
|
|
if limitConfig.LimitConnPerIP > 0 {
|
|
builder.WriteString(fmt.Sprintf(" limit_conn openflare_conn_per_ip %d;\n", limitConfig.LimitConnPerIP))
|
|
}
|
|
if strings.TrimSpace(limitConfig.LimitRate) != "" {
|
|
builder.WriteString(fmt.Sprintf(" limit_rate %s;\n", limitConfig.LimitRate))
|
|
}
|
|
return builder.String()
|
|
}
|
|
|
|
func renderRouteCachePolicyCondition(cacheConfig routeCacheConfig) string {
|
|
switch cacheConfig.Policy {
|
|
case cachePolicySuffix:
|
|
return fmt.Sprintf(" if ($uri !~* %s) {\n set $openflare_skip_cache 1;\n }\n", quoteNginxStringLiteral(buildSuffixMatchPattern(cacheConfig.Rules)))
|
|
case cachePolicyPathPrefix:
|
|
return fmt.Sprintf(" if ($uri !~ %s) {\n set $openflare_skip_cache 1;\n }\n", quoteNginxStringLiteral(buildPathPrefixMatchPattern(cacheConfig.Rules)))
|
|
case cachePolicyPathExact:
|
|
return fmt.Sprintf(" if ($uri !~ %s) {\n set $openflare_skip_cache 1;\n }\n", quoteNginxStringLiteral(buildPathExactMatchPattern(cacheConfig.Rules)))
|
|
default:
|
|
return ""
|
|
}
|
|
}
|
|
|
|
func renderProxyPassBlock(originURL string, upstreamConfig routeUpstreamConfig) string {
|
|
parsed, err := url.Parse(originURL)
|
|
if err != nil || parsed.Host == "" || parsed.Scheme == "" {
|
|
return fmt.Sprintf(" proxy_pass %s;\n", originURL)
|
|
}
|
|
if upstreamConfig.UsesNamedUpstream {
|
|
return fmt.Sprintf(" proxy_pass %s://%s%s;\n", upstreamConfig.Scheme, upstreamConfig.Name, upstreamConfig.ProxyPassURI)
|
|
}
|
|
return fmt.Sprintf(" proxy_pass %s;\n", originURL)
|
|
}
|
|
|
|
func buildRouteUpstreamConfig(route Route, upstreams []string) routeUpstreamConfig {
|
|
if len(upstreams) == 0 {
|
|
return routeUpstreamConfig{}
|
|
}
|
|
if len(upstreams) == 1 {
|
|
parsed, err := url.Parse(strings.TrimSpace(upstreams[0]))
|
|
if err != nil || parsed.Host == "" || parsed.Scheme == "" {
|
|
return routeUpstreamConfig{}
|
|
}
|
|
return routeUpstreamConfig{Name: buildRouteUpstreamName(route), Scheme: parsed.Scheme, ProxyPassURI: buildUpstreamProxyPassURI(parsed), Servers: []string{parsed.Host}, UsesNamedUpstream: true}
|
|
}
|
|
servers := make([]string, 0, len(upstreams))
|
|
var scheme string
|
|
for _, upstream := range upstreams {
|
|
parsed, err := url.Parse(strings.TrimSpace(upstream))
|
|
if err != nil || parsed.Host == "" || parsed.Scheme == "" || (strings.TrimSpace(parsed.EscapedPath()) != "" && strings.TrimSpace(parsed.EscapedPath()) != "/") || parsed.RawQuery != "" {
|
|
return routeUpstreamConfig{}
|
|
}
|
|
if scheme == "" {
|
|
scheme = parsed.Scheme
|
|
} else if scheme != parsed.Scheme {
|
|
return routeUpstreamConfig{}
|
|
}
|
|
servers = append(servers, parsed.Host)
|
|
}
|
|
return routeUpstreamConfig{Name: buildRouteUpstreamName(route), Scheme: scheme, Servers: servers, UsesNamedUpstream: true}
|
|
}
|
|
|
|
func renderNamedUpstreamBlock(upstreamConfig routeUpstreamConfig) string {
|
|
var builder strings.Builder
|
|
builder.WriteString(fmt.Sprintf("upstream %s {\n", upstreamConfig.Name))
|
|
for _, server := range upstreamConfig.Servers {
|
|
builder.WriteString(fmt.Sprintf(" server %s max_fails=3 fail_timeout=10s;\n", server))
|
|
}
|
|
builder.WriteString(" keepalive 128;\n}\n\n")
|
|
return builder.String()
|
|
}
|
|
|
|
func buildRouteUpstreamName(route Route) string {
|
|
identity := strings.TrimSpace(route.SiteName)
|
|
if identity == "" {
|
|
identity = route.Domain
|
|
}
|
|
sanitized := strings.Map(func(r rune) rune {
|
|
switch {
|
|
case r >= 'a' && r <= 'z':
|
|
return r
|
|
case r >= 'A' && r <= 'Z':
|
|
return r + ('a' - 'A')
|
|
case r >= '0' && r <= '9':
|
|
return r
|
|
default:
|
|
return '_'
|
|
}
|
|
}, identity)
|
|
sanitized = strings.Trim(sanitized, "_")
|
|
if sanitized == "" {
|
|
sanitized = "backend"
|
|
}
|
|
return fmt.Sprintf("backend_%s_%d", sanitized, route.ID)
|
|
}
|
|
|
|
func buildUpstreamProxyPassURI(parsed *url.URL) string {
|
|
path := parsed.EscapedPath()
|
|
if path == "/" {
|
|
path = ""
|
|
}
|
|
if parsed.RawQuery == "" {
|
|
return path
|
|
}
|
|
return fmt.Sprintf("%s?%s", path, parsed.RawQuery)
|
|
}
|
|
|
|
func renderConnectionUpgradeMap() string {
|
|
return " map $http_upgrade $connection_upgrade {\n default upgrade;\n '' \"\";\n }\n\n"
|
|
}
|
|
|
|
func renderDefaultServerBlock() string {
|
|
return strings.Join([]string{" server {", " listen 80 default_server;", " server_name _;", "", " return 404;", " }", "", " server {", " listen 443 ssl default_server;", " server_name _;", "", " ssl_reject_handshake on;", " }", ""}, "\n")
|
|
}
|
|
|
|
func normalizedRouteDomains(route Route) []string {
|
|
if len(route.Domains) > 0 {
|
|
return route.Domains
|
|
}
|
|
if strings.TrimSpace(route.Domain) == "" {
|
|
return nil
|
|
}
|
|
return []string{strings.TrimSpace(route.Domain)}
|
|
}
|
|
|
|
func normalizeCertIDs(primaryCertID *uint, certIDs []uint) []uint {
|
|
candidates := make([]uint, 0, len(certIDs)+1)
|
|
if primaryCertID != nil && *primaryCertID != 0 {
|
|
candidates = append(candidates, *primaryCertID)
|
|
}
|
|
candidates = append(candidates, certIDs...)
|
|
seen := make(map[uint]struct{}, len(candidates))
|
|
normalized := make([]uint, 0, len(candidates))
|
|
for _, id := range candidates {
|
|
if id == 0 {
|
|
continue
|
|
}
|
|
if _, ok := seen[id]; ok {
|
|
continue
|
|
}
|
|
seen[id] = struct{}{}
|
|
normalized = append(normalized, id)
|
|
}
|
|
return normalized
|
|
}
|
|
|
|
func normalizeDomainCertIDs(domains []string, certIDs []uint, domainCertIDs []uint) []uint {
|
|
if len(domainCertIDs) > 0 {
|
|
normalized := make([]uint, len(domainCertIDs))
|
|
copy(normalized, domainCertIDs)
|
|
return normalized
|
|
}
|
|
if len(certIDs) == 1 {
|
|
normalized := make([]uint, len(domains))
|
|
for index := range normalized {
|
|
normalized[index] = certIDs[0]
|
|
}
|
|
return normalized
|
|
}
|
|
if len(certIDs) == len(domains) {
|
|
normalized := make([]uint, len(certIDs))
|
|
copy(normalized, certIDs)
|
|
return normalized
|
|
}
|
|
return []uint{}
|
|
}
|
|
|
|
func certificatesByID(files []SupportFile) map[uint]string {
|
|
result := make(map[uint]string)
|
|
for _, file := range files {
|
|
if !strings.HasSuffix(file.Path, ".crt") {
|
|
continue
|
|
}
|
|
idText := strings.TrimSuffix(file.Path, ".crt")
|
|
var id uint
|
|
if _, err := fmt.Sscanf(idText, "%d", &id); err == nil && id != 0 {
|
|
result[id] = file.Content
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
func validateCertificateCoverage(certPEM string, domains []string) error {
|
|
block, _ := pem.Decode([]byte(certPEM))
|
|
if block == nil {
|
|
return errors.New("certificate PEM is invalid")
|
|
}
|
|
leaf, err := x509.ParseCertificate(block.Bytes)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, domain := range domains {
|
|
if err := leaf.VerifyHostname(domain); err != nil {
|
|
return fmt.Errorf("certificate does not cover domain %s", domain)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func getPoWConfigForRoute(routeID uint, snapshot WAFDocument) (bool, *PoWConfig) {
|
|
for _, binding := range snapshot.Bindings {
|
|
if binding.RouteID != routeID {
|
|
continue
|
|
}
|
|
for _, groupID := range binding.RuleGroupIDs {
|
|
for _, group := range snapshot.RuleGroups {
|
|
if group.ID == groupID && group.PoWEnabled {
|
|
return true, group.PoWConfig
|
|
}
|
|
}
|
|
}
|
|
break
|
|
}
|
|
for _, group := range snapshot.RuleGroups {
|
|
if group.IsGlobal && group.PoWEnabled {
|
|
return true, group.PoWConfig
|
|
}
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
func uniqueUintIDs(values []uint) []uint {
|
|
seen := make(map[uint]struct{}, len(values))
|
|
result := make([]uint, 0, len(values))
|
|
for _, value := range values {
|
|
if value == 0 {
|
|
continue
|
|
}
|
|
if _, ok := seen[value]; ok {
|
|
continue
|
|
}
|
|
seen[value] = struct{}{}
|
|
result = append(result, value)
|
|
}
|
|
return result
|
|
}
|
|
|
|
func resolveUpstreamServerName(originURL string, originHost string) string {
|
|
parsed, err := url.Parse(originURL)
|
|
if err != nil || !strings.EqualFold(parsed.Scheme, "https") {
|
|
return ""
|
|
}
|
|
if strings.TrimSpace(originHost) != "" {
|
|
parsedHost, err := url.Parse("//" + originHost)
|
|
if err == nil && parsedHost.Hostname() != "" {
|
|
return parsedHost.Hostname()
|
|
}
|
|
return originHost
|
|
}
|
|
return parsed.Hostname()
|
|
}
|
|
|
|
func renderServerNames(domains []string) string { return strings.Join(domains, " ") }
|
|
|
|
func onOff(value bool) string {
|
|
if value {
|
|
return "on"
|
|
}
|
|
return "off"
|
|
}
|
|
|
|
func quoteNginxStringLiteral(value string) string {
|
|
escaped := strings.ReplaceAll(value, `\`, `\\`)
|
|
escaped = strings.ReplaceAll(escaped, `"`, `\"`)
|
|
return fmt.Sprintf(`"%s"`, escaped)
|
|
}
|
|
|
|
func escapeNginxString(value string) string {
|
|
escaped := strings.ReplaceAll(value, `\`, `\\`)
|
|
escaped = strings.ReplaceAll(escaped, `"`, `\"`)
|
|
return escaped
|
|
}
|
|
|
|
func buildSuffixMatchPattern(rules []string) string {
|
|
parts := make([]string, 0, len(rules))
|
|
for _, rule := range rules {
|
|
parts = append(parts, regexp.QuoteMeta(rule))
|
|
}
|
|
return fmt.Sprintf("\\.(?:%s)$", strings.Join(parts, "|"))
|
|
}
|
|
|
|
func buildPathPrefixMatchPattern(rules []string) string {
|
|
parts := make([]string, 0, len(rules))
|
|
for _, rule := range rules {
|
|
trimmed := strings.TrimRight(rule, "/")
|
|
if trimmed == "" {
|
|
trimmed = "/"
|
|
}
|
|
if trimmed == "/" {
|
|
parts = append(parts, "/")
|
|
continue
|
|
}
|
|
parts = append(parts, fmt.Sprintf("%s(?:/|$)", regexp.QuoteMeta(trimmed)))
|
|
}
|
|
return fmt.Sprintf("^(?:%s)", strings.Join(parts, "|"))
|
|
}
|
|
|
|
func buildPathExactMatchPattern(rules []string) string {
|
|
parts := make([]string, 0, len(rules))
|
|
for _, rule := range rules {
|
|
parts = append(parts, regexp.QuoteMeta(rule))
|
|
}
|
|
return fmt.Sprintf("^(?:%s)$", strings.Join(parts, "|"))
|
|
}
|