julien.rbrt.fr
forked from
tangled.org/core
Monorepo for Tangled — https://tangled.org
1package idresolver
2
3import (
4 "context"
5 "net"
6 "net/http"
7 "sync"
8 "time"
9
10 "github.com/bluesky-social/indigo/atproto/identity"
11 "github.com/bluesky-social/indigo/atproto/identity/redisdir"
12 "github.com/bluesky-social/indigo/atproto/syntax"
13 "github.com/carlmjohnson/versioninfo"
14)
15
16type Resolver struct {
17 directory identity.Directory
18}
19
20func BaseDirectory(plcUrl string) identity.Directory {
21 base := identity.BaseDirectory{
22 PLCURL: plcUrl,
23 HTTPClient: http.Client{
24 Timeout: time.Second * 10,
25 Transport: &http.Transport{
26 // would want this around 100ms for services doing lots of handle resolution. Impacts PLC connections as well, but not too bad.
27 IdleConnTimeout: time.Millisecond * 1000,
28 MaxIdleConns: 100,
29 },
30 },
31 Resolver: net.Resolver{
32 Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
33 d := net.Dialer{Timeout: time.Second * 3}
34 return d.DialContext(ctx, network, address)
35 },
36 },
37 TryAuthoritativeDNS: true,
38 // primary Bluesky PDS instance only supports HTTP resolution method
39 SkipDNSDomainSuffixes: []string{".bsky.social"},
40 UserAgent: "indigo-identity/" + versioninfo.Short(),
41 }
42 return &base
43}
44
45func RedisDirectory(url, plcUrl string) (identity.Directory, error) {
46 hitTTL := time.Hour * 24
47 errTTL := time.Second * 30
48 invalidHandleTTL := time.Minute * 5
49 return redisdir.NewRedisDirectory(
50 BaseDirectory(plcUrl),
51 url,
52 hitTTL,
53 errTTL,
54 invalidHandleTTL,
55 10000,
56 )
57}
58
59func DefaultResolver(plcUrl string) *Resolver {
60 base := BaseDirectory(plcUrl)
61 cached := identity.NewCacheDirectory(base, 250_000, time.Hour*24, time.Minute*2, time.Minute*5)
62 return &Resolver{
63 directory: &cached,
64 }
65}
66
67func RedisResolver(redisUrl, plcUrl string) (*Resolver, error) {
68 directory, err := RedisDirectory(redisUrl, plcUrl)
69 if err != nil {
70 return nil, err
71 }
72 return &Resolver{
73 directory: directory,
74 }, nil
75}
76
77func (r *Resolver) ResolveIdent(ctx context.Context, arg string) (*identity.Identity, error) {
78 id, err := syntax.ParseAtIdentifier(arg)
79 if err != nil {
80 return nil, err
81 }
82
83 return r.directory.Lookup(ctx, *id)
84}
85
86func (r *Resolver) ResolveIdents(ctx context.Context, idents []string) []*identity.Identity {
87 results := make([]*identity.Identity, len(idents))
88 var wg sync.WaitGroup
89
90 done := make(chan struct{})
91 defer close(done)
92
93 for idx, ident := range idents {
94 wg.Add(1)
95 go func(index int, id string) {
96 defer wg.Done()
97
98 select {
99 case <-ctx.Done():
100 results[index] = nil
101 case <-done:
102 results[index] = nil
103 default:
104 identity, _ := r.ResolveIdent(ctx, id)
105 results[index] = identity
106 }
107 }(idx, ident)
108 }
109
110 wg.Wait()
111 return results
112}
113
114func (r *Resolver) InvalidateIdent(ctx context.Context, arg string) error {
115 id, err := syntax.ParseAtIdentifier(arg)
116 if err != nil {
117 return err
118 }
119
120 return r.directory.Purge(ctx, *id)
121}
122
123func (r *Resolver) Directory() identity.Directory {
124 return r.directory
125}