forked from dfuse-io/dfuse-eosio
/
get_table_row.go
135 lines (113 loc) · 4.13 KB
/
get_table_row.go
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// Copyright 2020 dfuse Platform Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"fmt"
"net/http"
"net/url"
"strconv"
"github.com/streamingfast/derr"
"github.com/streamingfast/logging"
"github.com/streamingfast/validator"
"github.com/zhongshuwen/dfuse-eosio/statedb"
zsw "github.com/zhongshuwen/zswchain-go"
"go.uber.org/zap"
)
func (srv *EOSServer) getTableRowHandler(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
zlogger := logging.Logger(ctx, zlog)
errors := validateGetTableRowRequest(r)
if len(errors) > 0 {
writeError(ctx, w, derr.RequestValidationError(ctx, errors))
return
}
request := extractGetTableRowRequest(r)
zlogger.Debug("extracted request", zap.Reflect("request", request))
actualBlockNum, lastWrittenBlock, upToBlock, speculativeWrites, err := srv.prepareRead(ctx, request.BlockNum, request.IrreversibleOnly)
if err != nil {
writeError(ctx, w, fmt.Errorf("prepare read failed: %w", err))
return
}
keyConverter := getKeyConverterForType(request.KeyType)
tablet := statedb.NewContractStateTablet(request.Account, request.Table, request.Scope)
tabletRow, serializationInfo, err := srv.readContractStateTableRow(
ctx,
tablet,
request.PrimaryKey,
actualBlockNum,
keyConverter,
request.ToJSON,
speculativeWrites,
)
if err != nil {
writeError(ctx, w, fmt.Errorf("read table row failed: %w", err))
return
}
row, err := toTableRow(tabletRow.(*statedb.ContractStateRow), keyConverter, serializationInfo, request.WithBlockNum)
if err != nil {
writeError(ctx, w, fmt.Errorf("creating table row failed: %w", err))
return
}
var abi *zsw.ABI
if serializationInfo != nil {
abi = serializationInfo.abi
}
response := &getTableRowResponse{
commonStateResponse: newCommonGetResponse(upToBlock, lastWrittenBlock),
ABI: abi,
Row: row,
}
zlogger.Debug("streaming response", zap.Reflect("common_response", response.commonStateResponse))
streamResponse(ctx, w, response)
}
type getTableRowRequest struct {
*readRequestCommon
IrreversibleOnly bool `json:"irreversible_only"`
Account string `json:"account"`
Table string `json:"table"`
Scope string `json:"scope"`
PrimaryKey string `json:"primary_key"`
}
type getTableRowResponse struct {
*commonStateResponse
ABI *zsw.ABI `json:"abi,omitempty"`
Row *tableRow `json:"row,omitempty"`
}
func validateGetTableRowRequest(r *http.Request) url.Values {
errors := validator.ValidateQueryParams(r, withCommonValidationRules(validator.Rules{
"account": []string{"required", "fluxdb.eos.name"},
"table": []string{"required", "fluxdb.eos.name"},
"scope": []string{"fluxdb.eos.extendedName"},
"primary_key": []string{"required"},
"irreversible_only": []string{"bool"},
}))
// Let's ensure the scope param is at least present (but can be the empty string)
if _, ok := r.Form["scope"]; !ok {
errors["scope"] = []string{"The scope field is required"}
}
// FIXME (MATT): Deal with KeyType here and conversion from key to uint64 to check if conversion if correct
return errors
}
func extractGetTableRowRequest(r *http.Request) *getTableRowRequest {
irreversibleOnly, _ := strconv.ParseBool(r.FormValue("irreversible_only"))
// FIXME (MATT): Convert from string key to actual uint64 then format the uint64 as %016x
return &getTableRowRequest{
readRequestCommon: extractReadRequestCommon(r),
Table: r.FormValue("table"),
Account: r.FormValue("account"),
Scope: r.FormValue("scope"),
PrimaryKey: r.FormValue("primary_key"),
IrreversibleOnly: irreversibleOnly,
}
}