e8752f4e9f
Co-authored-by: Janos Guljas <janos@resenje.org> Co-authored-by: Anton Evangelatov <anton.evangelatov@gmail.com> Co-authored-by: Balint Gabor <balint.g@gmail.com>
145 lines
3.7 KiB
Go
145 lines
3.7 KiB
Go
// Copyright 2017 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package api
|
|
|
|
import (
|
|
"fmt"
|
|
"net/url"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/swarm/storage"
|
|
)
|
|
|
|
//matches hex swarm hashes
|
|
// TODO: this is bad, it should not be hardcoded how long is a hash
|
|
var hashMatcher = regexp.MustCompile("^([0-9A-Fa-f]{64})([0-9A-Fa-f]{64})?$")
|
|
|
|
// URI is a reference to content stored in swarm.
|
|
type URI struct {
|
|
// Scheme has one of the following values:
|
|
//
|
|
// * bzz - an entry in a swarm manifest
|
|
// * bzz-raw - raw swarm content
|
|
// * bzz-immutable - immutable URI of an entry in a swarm manifest
|
|
// (address is not resolved)
|
|
// * bzz-list - list of all files contained in a swarm manifest
|
|
//
|
|
Scheme string
|
|
|
|
// Addr is either a hexadecimal storage address or it an address which
|
|
// resolves to a storage address
|
|
Addr string
|
|
|
|
// addr stores the parsed storage address
|
|
addr storage.Address
|
|
|
|
// Path is the path to the content within a swarm manifest
|
|
Path string
|
|
}
|
|
|
|
func (u *URI) MarshalJSON() (out []byte, err error) {
|
|
return []byte(`"` + u.String() + `"`), nil
|
|
}
|
|
|
|
func (u *URI) UnmarshalJSON(value []byte) error {
|
|
uri, err := Parse(string(value))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
*u = *uri
|
|
return nil
|
|
}
|
|
|
|
// Parse parses rawuri into a URI struct, where rawuri is expected to have one
|
|
// of the following formats:
|
|
//
|
|
// * <scheme>:/
|
|
// * <scheme>:/<addr>
|
|
// * <scheme>:/<addr>/<path>
|
|
// * <scheme>://
|
|
// * <scheme>://<addr>
|
|
// * <scheme>://<addr>/<path>
|
|
//
|
|
// with scheme one of bzz, bzz-raw, bzz-immutable, bzz-list or bzz-hash
|
|
func Parse(rawuri string) (*URI, error) {
|
|
u, err := url.Parse(rawuri)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
uri := &URI{Scheme: u.Scheme}
|
|
|
|
// check the scheme is valid
|
|
switch uri.Scheme {
|
|
case "bzz", "bzz-raw", "bzz-immutable", "bzz-list", "bzz-hash", "bzz-resource":
|
|
default:
|
|
return nil, fmt.Errorf("unknown scheme %q", u.Scheme)
|
|
}
|
|
|
|
// handle URIs like bzz://<addr>/<path> where the addr and path
|
|
// have already been split by url.Parse
|
|
if u.Host != "" {
|
|
uri.Addr = u.Host
|
|
uri.Path = strings.TrimLeft(u.Path, "/")
|
|
return uri, nil
|
|
}
|
|
|
|
// URI is like bzz:/<addr>/<path> so split the addr and path from
|
|
// the raw path (which will be /<addr>/<path>)
|
|
parts := strings.SplitN(strings.TrimLeft(u.Path, "/"), "/", 2)
|
|
uri.Addr = parts[0]
|
|
if len(parts) == 2 {
|
|
uri.Path = parts[1]
|
|
}
|
|
return uri, nil
|
|
}
|
|
func (u *URI) Resource() bool {
|
|
return u.Scheme == "bzz-resource"
|
|
}
|
|
|
|
func (u *URI) Raw() bool {
|
|
return u.Scheme == "bzz-raw"
|
|
}
|
|
|
|
func (u *URI) Immutable() bool {
|
|
return u.Scheme == "bzz-immutable"
|
|
}
|
|
|
|
func (u *URI) List() bool {
|
|
return u.Scheme == "bzz-list"
|
|
}
|
|
|
|
func (u *URI) Hash() bool {
|
|
return u.Scheme == "bzz-hash"
|
|
}
|
|
|
|
func (u *URI) String() string {
|
|
return u.Scheme + ":/" + u.Addr + "/" + u.Path
|
|
}
|
|
|
|
func (u *URI) Address() storage.Address {
|
|
if u.addr != nil {
|
|
return u.addr
|
|
}
|
|
if hashMatcher.MatchString(u.Addr) {
|
|
u.addr = common.Hex2Bytes(u.Addr)
|
|
return u.addr
|
|
}
|
|
return nil
|
|
}
|