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116 lines
3.7 KiB
Go
116 lines
3.7 KiB
Go
// Package iface defines IPFS Core API which is a set of interfaces used to
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// interact with IPFS nodes.
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package iface
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import (
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"context"
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"errors"
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"io"
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options "github.com/ipfs/go-ipfs/core/coreapi/interface/options"
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ipld "gx/ipfs/QmNwUEK7QbwSqyKBu3mMtToo8SUc6wQJ7gdZq4gGGJqfnf/go-ipld-format"
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cid "gx/ipfs/QmeSrf6pzut73u6zLQkRFQ3ygt3k6XFT2kjdYP8Tnkwwyg/go-cid"
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)
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// Path is a generic wrapper for paths used in the API. A path can be resolved
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// to a CID using one of Resolve functions in the API.
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type Path interface {
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String() string
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Cid() *cid.Cid
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Root() *cid.Cid
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Resolved() bool
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}
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// TODO: should we really copy these?
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// if we didn't, godoc would generate nice links straight to go-ipld-format
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type Node ipld.Node
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type Link ipld.Link
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type Reader interface {
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io.ReadSeeker
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io.Closer
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}
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// CoreAPI defines an unified interface to IPFS for Go programs.
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type CoreAPI interface {
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// Unixfs returns an implementation of Unixfs API
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Unixfs() UnixfsAPI
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Dag() DagAPI
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// ResolvePath resolves the path using Unixfs resolver
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ResolvePath(context.Context, Path) (Path, error)
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// ResolveNode resolves the path (if not resolved already) using Unixfs
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// resolver, gets and returns the resolved Node
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ResolveNode(context.Context, Path) (Node, error)
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}
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// UnixfsAPI is the basic interface to immutable files in IPFS
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type UnixfsAPI interface {
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// Add imports the data from the reader into merkledag file
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Add(context.Context, io.Reader) (Path, error)
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// Cat returns a reader for the file
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Cat(context.Context, Path) (Reader, error)
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// Ls returns the list of links in a directory
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Ls(context.Context, Path) ([]*Link, error)
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}
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// DagAPI specifies the interface to IPLD
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type DagAPI interface {
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// Put inserts data using specified format and input encoding.
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// If format is not specified (nil), default dag-cbor/sha256 is used
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Put(ctx context.Context, src io.Reader, opts ...options.DagPutOption) ([]Node, error)
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// WithInputEnc is an option for Put which specifies the input encoding of the
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// data. Default is "json", most formats/codecs support "raw"
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WithInputEnc(enc string) options.DagPutOption
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// WithCodec is an option for Put which specifies the multicodec to use to
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// serialize the object. Default is cid.DagCBOR (0x71)
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WithCodec(codec uint64) options.DagPutOption
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// WithHash is an option for Put which specifies the multihash settings to use
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// when hashing the object. Default is based on the codec used
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// (mh.SHA2_256 (0x12) for DagCBOR). If mhLen is set to -1, default length for
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// the hash will be used
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WithHash(mhType uint64, mhLen int) options.DagPutOption
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// Get attempts to resolve and get the node specified by the path
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Get(ctx context.Context, path Path) (Node, error)
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// Tree returns list of paths within a node specified by the path.
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Tree(ctx context.Context, path Path, opts ...options.DagTreeOption) ([]Path, error)
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// WithDepth is an option for Tree which specifies maximum depth of the
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// returned tree. Default is -1 (no depth limit)
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WithDepth(depth int) options.DagTreeOption
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}
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// type ObjectAPI interface {
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// New() (cid.Cid, Object)
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// Get(string) (Object, error)
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// Links(string) ([]*Link, error)
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// Data(string) (Reader, error)
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// Stat(string) (ObjectStat, error)
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// Put(Object) (cid.Cid, error)
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// SetData(string, Reader) (cid.Cid, error)
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// AppendData(string, Data) (cid.Cid, error)
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// AddLink(string, string, string) (cid.Cid, error)
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// RmLink(string, string) (cid.Cid, error)
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// }
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// type ObjectStat struct {
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// Cid cid.Cid
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// NumLinks int
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// BlockSize int
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// LinksSize int
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// DataSize int
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// CumulativeSize int
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// }
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var ErrIsDir = errors.New("object is a directory")
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var ErrOffline = errors.New("can't resolve, ipfs node is offline")
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