| 1 | package rpc |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "encoding/base64" |
| 7 | "encoding/json" |
| 8 | |
| 9 | "github.com/ipfs/boxo/path" |
| 10 | "github.com/ipfs/kubo/core/coreiface/options" |
| 11 | "github.com/libp2p/go-libp2p/core/peer" |
| 12 | "github.com/libp2p/go-libp2p/core/routing" |
| 13 | ) |
| 14 | |
| 15 | type RoutingAPI HttpApi |
| 16 | |
| 17 | func (api *RoutingAPI) Get(ctx context.Context, key string) ([]byte, error) { |
| 18 | resp, err := api.core().Request("routing/get", key).Send(ctx) |
| 19 | if err != nil { |
| 20 | return nil, err |
| 21 | } |
| 22 | if resp.Error != nil { |
| 23 | return nil, resp.Error |
| 24 | } |
| 25 | defer resp.Close() |
| 26 | |
| 27 | var out routing.QueryEvent |
| 28 | |
| 29 | dec := json.NewDecoder(resp.Output) |
| 30 | if err := dec.Decode(&out); err != nil { |
| 31 | return nil, err |
| 32 | } |
| 33 | |
| 34 | res, err := base64.StdEncoding.DecodeString(out.Extra) |
| 35 | if err != nil { |
| 36 | return nil, err |
| 37 | } |
| 38 | |
| 39 | return res, nil |
| 40 | } |
| 41 | |
| 42 | func (api *RoutingAPI) Put(ctx context.Context, key string, value []byte, opts ...options.RoutingPutOption) error { |
| 43 | var cfg options.RoutingPutSettings |
| 44 | for _, o := range opts { |
| 45 | if err := o(&cfg); err != nil { |
| 46 | return err |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | resp, err := api.core().Request("routing/put", key). |
| 51 | Option("allow-offline", cfg.AllowOffline). |
| 52 | FileBody(bytes.NewReader(value)). |
| 53 | Send(ctx) |
| 54 | if err != nil { |
| 55 | return err |
| 56 | } |
| 57 | if resp.Error != nil { |
| 58 | return resp.Error |
| 59 | } |
| 60 | return nil |
| 61 | } |
| 62 | |
| 63 | func (api *RoutingAPI) FindPeer(ctx context.Context, p peer.ID) (peer.AddrInfo, error) { |
| 64 | var out struct { |
| 65 | Type routing.QueryEventType |
| 66 | Responses []peer.AddrInfo |
| 67 | } |
| 68 | resp, err := api.core().Request("routing/findpeer", p.String()).Send(ctx) |
| 69 | if err != nil { |
| 70 | return peer.AddrInfo{}, err |
| 71 | } |
| 72 | if resp.Error != nil { |
| 73 | return peer.AddrInfo{}, resp.Error |
| 74 | } |
| 75 | defer resp.Close() |
| 76 | dec := json.NewDecoder(resp.Output) |
| 77 | for { |
| 78 | if err := dec.Decode(&out); err != nil { |
| 79 | return peer.AddrInfo{}, err |
| 80 | } |
| 81 | if out.Type == routing.FinalPeer { |
| 82 | return out.Responses[0], nil |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | func (api *RoutingAPI) FindProviders(ctx context.Context, p path.Path, opts ...options.RoutingFindProvidersOption) (<-chan peer.AddrInfo, error) { |
| 88 | options, err := options.RoutingFindProvidersOptions(opts...) |
| 89 | if err != nil { |
| 90 | return nil, err |
| 91 | } |
| 92 | |
| 93 | rp, _, err := api.core().ResolvePath(ctx, p) |
| 94 | if err != nil { |
| 95 | return nil, err |
| 96 | } |
| 97 | |
| 98 | resp, err := api.core().Request("routing/findprovs", rp.RootCid().String()). |
| 99 | Option("num-providers", options.NumProviders). |
| 100 | Send(ctx) |
| 101 | if err != nil { |
| 102 | return nil, err |
| 103 | } |
| 104 | if resp.Error != nil { |
| 105 | return nil, resp.Error |
| 106 | } |
| 107 | res := make(chan peer.AddrInfo) |
| 108 | |
| 109 | go func() { |
| 110 | defer resp.Close() |
| 111 | defer close(res) |
| 112 | dec := json.NewDecoder(resp.Output) |
| 113 | |
| 114 | for { |
| 115 | var out struct { |
| 116 | Extra string |
| 117 | Type routing.QueryEventType |
| 118 | Responses []peer.AddrInfo |
| 119 | } |
| 120 | |
| 121 | if err := dec.Decode(&out); err != nil { |
| 122 | return // todo: handle this somehow |
| 123 | } |
| 124 | if out.Type == routing.QueryError { |
| 125 | return // usually a 'not found' error |
| 126 | // todo: handle other errors |
| 127 | } |
| 128 | if out.Type == routing.Provider { |
| 129 | for _, pi := range out.Responses { |
| 130 | select { |
| 131 | case res <- pi: |
| 132 | case <-ctx.Done(): |
| 133 | return |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | }() |
| 139 | |
| 140 | return res, nil |
| 141 | } |
| 142 | |
| 143 | func (api *RoutingAPI) Provide(ctx context.Context, p path.Path, opts ...options.RoutingProvideOption) error { |
| 144 | options, err := options.RoutingProvideOptions(opts...) |
| 145 | if err != nil { |
| 146 | return err |
| 147 | } |
| 148 | |
| 149 | rp, _, err := api.core().ResolvePath(ctx, p) |
| 150 | if err != nil { |
| 151 | return err |
| 152 | } |
| 153 | |
| 154 | return api.core().Request("routing/provide", rp.RootCid().String()). |
| 155 | Option("recursive", options.Recursive). |
| 156 | Exec(ctx, nil) |
| 157 | } |
| 158 | |
| 159 | func (api *RoutingAPI) core() *HttpApi { |
| 160 | return (*HttpApi)(api) |
| 161 | } |