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plugin: Add support for content blocking in Kubo
Fixes #8492. This introduces "nopfs" as a preloaded plugin into Kubo. It automatically make Kubo watch *.deny files found in: - /etc/ipfs/denylists - $XDG_CONFIG_HOME/ipfs/denylists - $IPFS_PATH/denylists (files need to be present before boot in order to be watched). Debug logging can be enabled with `GOLOG_LOG_LEVEL="nopfs=debug"`. All blocks are logged to "nopfs-blocks", so logging requests for blocked content can be achieved with `GOLOG_LOG_LEVEL="nopfs-blocks=info"`. Interactive users will receive the error as response to their commands too. One particularity to keep in mind is that GetMany() will silently drop blocked blocks from the response (an error and a warning are logged). AddMany() will act similarly and avoid adding blocked blocks.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package nopfs | ||
|
|
||
| import ( | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/ipfs-shipyard/nopfs" | ||
| "github.com/ipfs-shipyard/nopfs/ipfs" | ||
| "github.com/ipfs/kubo/config" | ||
| "github.com/ipfs/kubo/core" | ||
| "github.com/ipfs/kubo/core/node" | ||
| "github.com/ipfs/kubo/plugin" | ||
| "go.uber.org/fx" | ||
| ) | ||
|
|
||
| // Plugins sets the list of plugins to be loaded. | ||
| var Plugins = []plugin.Plugin{ | ||
| &nopfsPlugin{}, | ||
| } | ||
|
|
||
| // fxtestPlugin is used for testing the fx plugin. | ||
| // It merely adds an fx option that logs a debug statement, so we can verify that it works in tests. | ||
| type nopfsPlugin struct{} | ||
|
|
||
| var _ plugin.PluginFx = (*nopfsPlugin)(nil) | ||
|
|
||
| func (p *nopfsPlugin) Name() string { | ||
| return "nopfs" | ||
| } | ||
|
|
||
| func (p *nopfsPlugin) Version() string { | ||
| return "0.0.10" | ||
| } | ||
|
|
||
| func (p *nopfsPlugin) Init(env *plugin.Environment) error { | ||
| return nil | ||
| } | ||
|
|
||
| // MakeBlocker is a factory for the blocker so that it can be provided with Fx. | ||
| func MakeBlocker() (*nopfs.Blocker, error) { | ||
| ipfsPath, err := config.PathRoot() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| defaultFiles, err := nopfs.GetDenylistFiles() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| kuboFiles, err := nopfs.GetDenylistFilesInDir(filepath.Join(ipfsPath, "denylists")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| files := append(defaultFiles, kuboFiles...) | ||
|
|
||
| return nopfs.NewBlocker(files) | ||
| } | ||
|
|
||
| // PathResolvers returns wrapped PathResolvers for Kubo. | ||
| func PathResolvers(fetchers node.FetchersIn, blocker *nopfs.Blocker) node.PathResolversOut { | ||
| res := node.PathResolverConfig(fetchers) | ||
| return node.PathResolversOut{ | ||
| IPLDPathResolver: ipfs.WrapResolver(res.IPLDPathResolver, blocker), | ||
| UnixFSPathResolver: ipfs.WrapResolver(res.UnixFSPathResolver, blocker), | ||
| } | ||
| } | ||
|
|
||
| func (p *nopfsPlugin) Options(info core.FXNodeInfo) ([]fx.Option, error) { | ||
| if os.Getenv("IPFS_CONTENT_BLOCKING_DISABLE") != "" { | ||
| return info.FXOptions, nil | ||
| } | ||
|
|
||
| opts := append( | ||
| info.FXOptions, | ||
| fx.Provide(MakeBlocker), | ||
| fx.Decorate(ipfs.WrapBlockService), | ||
| fx.Decorate(ipfs.WrapNameSystem), | ||
| fx.Decorate(PathResolvers), | ||
| ) | ||
| return opts, nil | ||
| } |