mirror of
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145 lines
3.7 KiB
Go
145 lines
3.7 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package api
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import (
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/rpc/codec"
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"github.com/ethereum/go-ethereum/rpc/shared"
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"github.com/ethereum/go-ethereum/xeth"
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)
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const (
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DbApiversion = "1.0"
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)
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var (
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// mapping between methods and handlers
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DbMapping = map[string]dbhandler{
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"db_getString": (*dbApi).GetString,
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"db_putString": (*dbApi).PutString,
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"db_getHex": (*dbApi).GetHex,
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"db_putHex": (*dbApi).PutHex,
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}
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)
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// db callback handler
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type dbhandler func(*dbApi, *shared.Request) (interface{}, error)
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// db api provider
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type dbApi struct {
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xeth *xeth.XEth
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ethereum *eth.Ethereum
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methods map[string]dbhandler
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codec codec.ApiCoder
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}
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// create a new db api instance
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func NewDbApi(xeth *xeth.XEth, ethereum *eth.Ethereum, coder codec.Codec) *dbApi {
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return &dbApi{
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xeth: xeth,
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ethereum: ethereum,
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methods: DbMapping,
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codec: coder.New(nil),
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}
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}
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// collection with supported methods
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func (self *dbApi) Methods() []string {
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methods := make([]string, len(self.methods))
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i := 0
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for k := range self.methods {
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methods[i] = k
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i++
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}
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return methods
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}
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// Execute given request
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func (self *dbApi) Execute(req *shared.Request) (interface{}, error) {
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if callback, ok := self.methods[req.Method]; ok {
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return callback(self, req)
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}
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return nil, &shared.NotImplementedError{req.Method}
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}
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func (self *dbApi) Name() string {
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return shared.DbApiName
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}
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func (self *dbApi) ApiVersion() string {
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return DbApiversion
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}
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func (self *dbApi) GetString(req *shared.Request) (interface{}, error) {
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args := new(DbArgs)
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if err := self.codec.Decode(req.Params, &args); err != nil {
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return nil, shared.NewDecodeParamError(err.Error())
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}
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if err := args.requirements(); err != nil {
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return nil, err
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}
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ret, err := self.xeth.DbGet([]byte(args.Database + args.Key))
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return string(ret), err
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}
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func (self *dbApi) PutString(req *shared.Request) (interface{}, error) {
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args := new(DbArgs)
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if err := self.codec.Decode(req.Params, &args); err != nil {
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return nil, shared.NewDecodeParamError(err.Error())
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}
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if err := args.requirements(); err != nil {
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return nil, err
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}
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return self.xeth.DbPut([]byte(args.Database+args.Key), args.Value), nil
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}
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func (self *dbApi) GetHex(req *shared.Request) (interface{}, error) {
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args := new(DbHexArgs)
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if err := self.codec.Decode(req.Params, &args); err != nil {
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return nil, shared.NewDecodeParamError(err.Error())
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}
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if err := args.requirements(); err != nil {
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return nil, err
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}
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if res, err := self.xeth.DbGet([]byte(args.Database + args.Key)); err == nil {
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return newHexData(res), nil
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} else {
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return nil, err
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}
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}
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func (self *dbApi) PutHex(req *shared.Request) (interface{}, error) {
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args := new(DbHexArgs)
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if err := self.codec.Decode(req.Params, &args); err != nil {
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return nil, shared.NewDecodeParamError(err.Error())
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}
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if err := args.requirements(); err != nil {
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return nil, err
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}
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return self.xeth.DbPut([]byte(args.Database+args.Key), args.Value), nil
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}
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