| 1 | package console |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "net" |
| 7 | "net/http" |
| 8 | "strings" |
| 9 | |
| 10 | "github.com/carlosframework/platform/internal/provision" |
| 11 | ) |
| 12 | |
| 13 | // appDefaultView is §9.3's app_default. region is the STORED region (what |
| 14 | // deploy --region compares against); effective is where a no-region create |
| 15 | // lands: the fleet itself for a placed app, never the platform home |
| 16 | // (codex R2-4). RegionKnown and PlacementKnown say which facts were READ: |
| 17 | // an unread fact is left empty, never filled with the home (codex |
| 18 | // plan-R2 3; spec R9a). InstanceDomain is the domain instance hosts take, |
| 19 | // so canary --region can name its host before any write (codex plan-R3 1). |
| 20 | type appDefaultView struct { |
| 21 | Region string `json:"region"` |
| 22 | Name string `json:"name"` |
| 23 | Source string `json:"source"` |
| 24 | Effective string `json:"effective"` |
| 25 | Available *bool `json:"available,omitempty"` |
| 26 | Reason string `json:"reason,omitempty"` |
| 27 | RegionKnown bool `json:"region_known"` |
| 28 | PlacementKnown bool `json:"placement_known"` |
| 29 | InstanceDomain string `json:"instance_domain,omitempty"` |
| 30 | } |
| 31 | |
| 32 | func boolp(b bool) *bool { return &b } |
| 33 | |
| 34 | func (s *Server) appDefault(ctx context.Context, acct *Account, app string) appDefaultView { |
| 35 | stored, source, rerr := s.appRegion(acct.ID, app) |
| 36 | snap, ferr := s.liveEdges(ctx) |
| 37 | cands := homeOnlyCandidates() |
| 38 | if ferr == nil { |
| 39 | cands = s.regionCands(snap) |
| 40 | } |
| 41 | pol := s.appPolicy(ctx, acct, app) |
| 42 | v := appDefaultView{RegionKnown: rerr == nil, PlacementKnown: pol.State != policyUnreadable} |
| 43 | switch pol.State { |
| 44 | case policyKnown: |
| 45 | v.InstanceDomain = pol.M.Domain |
| 46 | case policyAbsent: |
| 47 | v.InstanceDomain = s.platformInstanceDomain(acct) |
| 48 | } |
| 49 | if rerr == nil { |
| 50 | v.Region, v.Name, v.Source, v.Effective = s.homeRegionOut(stored), s.placeOf(stored, cands), source, s.homeRegionOut(stored) |
| 51 | } |
| 52 | switch { |
| 53 | case pol.State == policyUnreadable: |
| 54 | // policy-unreadable is reserved for placement_known being false |
| 55 | // (spec §9.3). |
| 56 | v.Reason = "policy-unreadable" |
| 57 | return v |
| 58 | case pol.Placed != "": |
| 59 | // R9a: with the stored region unread, effective stays empty even |
| 60 | // though the fleet is known; reason still says fleet (codex |
| 61 | // plan-R4 1). |
| 62 | v.Reason = "fleet" |
| 63 | if rerr == nil { |
| 64 | v.Effective = pol.Placed |
| 65 | } |
| 66 | return v |
| 67 | case pol.pooled(): |
| 68 | // A no-region pooled create lands on the home, so it is available |
| 69 | // only when the home passes the allow-list (codex plan-R3 2). R9a |
| 70 | // again: nothing about effective is stated when the region is unread. |
| 71 | v.Reason = "pooled" |
| 72 | if rerr == nil { |
| 73 | v.Effective, v.Available = s.homeRegionOut(""), boolp(pol.allows("")) |
| 74 | } |
| 75 | return v |
| 76 | case rerr != nil: |
| 77 | // The stored region is unread, so where a create lands is unknown. |
| 78 | // Nothing is stated about it, and no reason either: the placement |
| 79 | // WAS read (controller ruling PF7). |
| 80 | return v |
| 81 | case ferr != nil, stored != "" && !snap.EvidenceComplete(): |
| 82 | // A failed listing, or (for a non-home region) a listing with an |
| 83 | // edges file or a box snapshot unread: the evidence is not there |
| 84 | // to say the region can take an instance, and the create door |
| 85 | // would answer C28 for the same reason (re-review r1). |
| 86 | v.Reason = "edges-unreadable" |
| 87 | return v |
| 88 | } |
| 89 | reason := "absent" |
| 90 | if c, ok := findCandidate(cands, stored); ok { |
| 91 | reason = c.unavailableReason() |
| 92 | } |
| 93 | if reason == "" && !pol.allows(stored) { |
| 94 | reason = "not-allowed" |
| 95 | } |
| 96 | v.Reason, v.Available = reason, boolp(reason == "") |
| 97 | return v |
| 98 | } |
| 99 | |
| 100 | // platformInstanceDomain is the domain the instances-manifest PUT stamps on |
| 101 | // a NEW manifest (handleAPIInstancesEnable): "" when this console has no |
| 102 | // valid platform apps domain, which that PUT refuses. With a manifest, its |
| 103 | // own domain governs instead. |
| 104 | func (s *Server) platformInstanceDomain(acct *Account) string { |
| 105 | if s.cfg.AppsDomain == "" { |
| 106 | return "" |
| 107 | } |
| 108 | d := acct.Sqid + "." + s.cfg.AppsDomain |
| 109 | if !provision.ValidHostShape(d) { |
| 110 | return "" |
| 111 | } |
| 112 | return d |
| 113 | } |
| 114 | |
| 115 | // handleAPIRegionGuess is POST …/regions/guess (spec §9.4). Hints come only |
| 116 | // in the body, so no redirect can echo them. A malformed body is read as |
| 117 | // no hints; a person's request with no ip uses its own address, a service |
| 118 | // principal's never does. |
| 119 | // |
| 120 | // A fleet-placed app gets no guess (codex R4-1), and a failed placement |
| 121 | // lookup is an explicit 502, never a guess from a policy that was not read. |
| 122 | func (s *Server) handleAPIRegionGuess(w http.ResponseWriter, r *http.Request) { |
| 123 | _, acct, app, ok := s.instanceGate(w, r) |
| 124 | if !ok { |
| 125 | return |
| 126 | } |
| 127 | var body struct { |
| 128 | TZ string `json:"tz"` |
| 129 | IP string `json:"ip"` |
| 130 | } |
| 131 | _ = json.NewDecoder(http.MaxBytesReader(w, r.Body, 64<<10)).Decode(&body) |
| 132 | pol := s.appPolicy(r.Context(), acct, app) |
| 133 | if pol.State == policyUnreadable { |
| 134 | jsonError(w, http.StatusBadGateway, msgPolicyUnreadable) |
| 135 | return |
| 136 | } |
| 137 | if pol.Placed != "" || pol.pooled() { |
| 138 | writeJSON(w, http.StatusOK, map[string]any{"guess": nil}) |
| 139 | return |
| 140 | } |
| 141 | ip := net.ParseIP(strings.TrimSpace(body.IP)) |
| 142 | if ip == nil { |
| 143 | ip = s.personIP(r) |
| 144 | } |
| 145 | files, err := s.liveEdges(r.Context()) |
| 146 | cands := homeOnlyCandidates() |
| 147 | if err == nil { |
| 148 | cands = s.regionCands(files) |
| 149 | } |
| 150 | g, ok := guessRegion(cands, pol.allows, guessInput{TZ: body.TZ, IP: ip}, s.cfg.GeoIP) |
| 151 | if !ok { |
| 152 | writeJSON(w, http.StatusOK, map[string]any{"guess": nil}) |
| 153 | return |
| 154 | } |
| 155 | writeJSON(w, http.StatusOK, map[string]any{"guess": map[string]string{ |
| 156 | "code": s.homeRegionOut(g.Code), "name": s.placeOf(g.Code, cands), "source": g.Source, |
| 157 | }}) |
| 158 | } |
| 159 | |
amadan