| 1 | package daemon |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "fmt" |
| 7 | "net" |
| 8 | "net/http" |
| 9 | "net/url" |
| 10 | "strings" |
| 11 | |
| 12 | "github.com/FelineStateMachine/tinyrelay/internal/catalog" |
| 13 | "github.com/FelineStateMachine/tinyrelay/internal/sites" |
| 14 | ) |
| 15 | |
| 16 | // siteBase returns the tenant-scoped site hostname. A tenant named alice on |
| 17 | // relay.example has sites at <site>.alice.relay.example, keeping identical |
| 18 | // site labels on different tenants isolated. |
| 19 | func (a *App) siteBase(meta catalog.Tenant) string { |
| 20 | base := "localhost" |
| 21 | if a.cfg.PublicURL != "" { |
| 22 | if u, err := url.Parse(a.cfg.PublicURL); err == nil && u.Hostname() != "" { |
| 23 | base = u.Hostname() |
| 24 | } |
| 25 | } |
| 26 | if ip := net.ParseIP(base); ip != nil { |
| 27 | return meta.Name + "." + base |
| 28 | } |
| 29 | return meta.Name + "." + strings.TrimSuffix(strings.ToLower(base), "." ) |
| 30 | } |
| 31 | |
| 32 | // resolveHostedSite resolves a site host without opening a tenant. The bool |
| 33 | // distinguishes a relay host from a site host, while errors preserve catalog |
| 34 | // failures for callers that should not fall back to the default tenant. |
| 35 | func (a *App) resolveHostedSite(r *http.Request) (catalog.Tenant, string, bool, error) { |
| 36 | host := strings.ToLower(r.Host) |
| 37 | if h, _, err := net.SplitHostPort(host); err == nil { |
| 38 | host = h |
| 39 | } |
| 40 | if strings.HasPrefix(r.URL.Path, "/r/" ) { |
| 41 | parts := strings.Split(strings.TrimPrefix(r.URL.Path, "/r/" ), "/" ) |
| 42 | if len(parts) > 0 && parts[0] != "" { |
| 43 | meta, err := a.catalog.GetByName(r.Context(), parts[0]) |
| 44 | return meta, "" , false, err |
| 45 | } |
| 46 | } |
| 47 | if mapping, err := a.catalog.ResolveHostMapping(r.Context(), host); err == nil { |
| 48 | meta, getErr := a.catalog.GetByID(r.Context(), mapping.TenantID) |
| 49 | if getErr != nil { |
| 50 | return catalog.Tenant{}, "" , false, getErr |
| 51 | } |
| 52 | if mapping.Site == "" { |
| 53 | return meta, "" , false, nil |
| 54 | } |
| 55 | if _, ok := sites.ParseSite(mapping.Site); !ok { |
| 56 | return catalog.Tenant{}, mapping.Site, true, errors.New("invalid mapped site label" ) |
| 57 | } |
| 58 | return meta, mapping.Site, true, nil |
| 59 | } else if !errors.Is(err, catalog.ErrHostMappingNotFound) { |
| 60 | return catalog.Tenant{}, "" , false, err |
| 61 | } |
| 62 | base := strings.TrimSuffix(strings.ToLower(a.siteBaseHost()), "." ) |
| 63 | suffix := "." + base |
| 64 | if !strings.HasSuffix(host, suffix) { |
| 65 | return catalog.Tenant{}, "" , false, catalog.ErrNotFound |
| 66 | } |
| 67 | relative := strings.TrimSuffix(strings.TrimSuffix(host, suffix), "." ) |
| 68 | parts := strings.Split(relative, "." ) |
| 69 | if len(parts) == 1 { |
| 70 | if _, ok := sites.ParseSite(relative); !ok { |
| 71 | return catalog.Tenant{}, "" , false, catalog.ErrNotFound |
| 72 | } |
| 73 | meta, err := a.catalog.GetByName(r.Context(), a.cfg.DefaultTenant) |
| 74 | return meta, relative, true, err |
| 75 | } |
| 76 | if len(parts) < 2 { |
| 77 | return catalog.Tenant{}, "" , false, catalog.ErrNotFound |
| 78 | } |
| 79 | label := strings.Join(parts[:len(parts)-1], "." ) |
| 80 | if _, ok := sites.ParseSite(label); !ok { |
| 81 | return catalog.Tenant{}, label, true, catalog.ErrNotFound |
| 82 | } |
| 83 | tenantName := parts[len(parts)-1] |
| 84 | meta, err := a.catalog.GetByName(r.Context(), tenantName) |
| 85 | if err != nil { |
| 86 | return catalog.Tenant{}, label, true, err |
| 87 | } |
| 88 | return meta, label, true, nil |
| 89 | } |
| 90 | |
| 91 | func (a *App) siteBaseHost() string { |
| 92 | if a.cfg.PublicURL == "" { |
| 93 | return "localhost" |
| 94 | } |
| 95 | u, err := url.Parse(a.cfg.PublicURL) |
| 96 | if err != nil || u.Hostname() == "" { |
| 97 | return "localhost" |
| 98 | } |
| 99 | return u.Hostname() |
| 100 | } |
| 101 | |
| 102 | // siteHostResolver is injected into a tenant's sites service. It only returns |
| 103 | // labels assigned to that tenant, preventing a custom host or namespace host |
| 104 | // from crossing tenant boundaries. |
| 105 | func (t *Tenant) siteHostResolver(ctx context.Context, host string) (string, error) { |
| 106 | host = strings.ToLower(host) |
| 107 | if h, _, err := net.SplitHostPort(host); err == nil { |
| 108 | host = h |
| 109 | } |
| 110 | if mapping, err := t.app.catalog.ResolveHostMapping(ctx, host); err == nil { |
| 111 | if mapping.TenantID != t.meta.ID || mapping.Site == "" { |
| 112 | return "" , catalog.ErrHostMappingNotFound |
| 113 | } |
| 114 | return mapping.Site, nil |
| 115 | } else if !errors.Is(err, catalog.ErrHostMappingNotFound) { |
| 116 | return "" , err |
| 117 | } |
| 118 | base := "." + strings.ToLower(t.app.siteBase(t.meta)) |
| 119 | if !strings.HasSuffix(host, base) { |
| 120 | return "" , catalog.ErrNotFound |
| 121 | } |
| 122 | label := strings.TrimSuffix(strings.TrimSuffix(host, base), "." ) |
| 123 | if _, ok := sites.ParseSite(label); !ok { |
| 124 | return "" , catalog.ErrNotFound |
| 125 | } |
| 126 | return label, nil |
| 127 | } |
| 128 | |
| 129 | func (a *App) hostedSiteURL(meta catalog.Tenant, label string) string { |
| 130 | if label == "" { |
| 131 | return "" |
| 132 | } |
| 133 | return fmt.Sprintf("https://%s/%s" , a.siteBase(meta), label) |
| 134 | } |