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filter_http_transaction.go
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/
filter_http_transaction.go
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/*
* Copyright 2022 CECTC, 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 dt
import (
"context"
"fmt"
"net/http"
"github.com/pkg/errors"
"github.com/valyala/fasthttp"
"go.opentelemetry.io/otel/attribute"
"github.com/cectc/dbpack/pkg/dt"
"github.com/cectc/dbpack/pkg/dt/api"
"github.com/cectc/dbpack/pkg/log"
"github.com/cectc/dbpack/pkg/tracing"
)
// handleHttp1GlobalBegin return bool, represent whether continue
func (f *_httpFilter) handleHttp1GlobalBegin(ctx context.Context, fastHttpCtx *fasthttp.RequestCtx, transactionInfo *TransactionInfo) (bool, error) {
// todo support transaction isolation level
globalTransactionName := string(fastHttpCtx.Request.RequestURI())
spanCtx, span := tracing.GetTraceSpan(ctx, tracing.GlobalTransactionBegin)
span.SetAttributes(attribute.KeyValue{Key: "global-transaction-name", Value: attribute.StringValue(globalTransactionName)})
defer span.End()
transactionManager := dt.GetTransactionManager(f.conf.ApplicationID)
xid, err := transactionManager.Begin(spanCtx, globalTransactionName, transactionInfo.Timeout)
if err != nil {
tracing.RecordErrorSpan(span, err)
fastHttpCtx.Response.Reset()
fastHttpCtx.SetStatusCode(http.StatusInternalServerError)
fastHttpCtx.SetBodyString(fmt.Sprintf(`{"success":false,"error":"failed to begin global transaction, %v"}`, err))
return false, errors.Errorf("failed to begin global transaction, transaction info: %v, err: %v",
transactionInfo, err)
}
fastHttpCtx.SetUserValue(XID, xid)
fastHttpCtx.Request.Header.Add(XID, xid)
return true, nil
}
func (f *_httpFilter) handleHttp1GlobalEnd(ctx context.Context, fastHttpCtx *fasthttp.RequestCtx) error {
spanCtx, span := tracing.GetTraceSpan(ctx, tracing.GlobalTransactionEnd)
defer span.End()
xidParam := fastHttpCtx.UserValue(XID)
xid := xidParam.(string)
if fastHttpCtx.Response.StatusCode() == http.StatusOK {
err := f.globalCommit(spanCtx, xid)
if err != nil {
tracing.RecordErrorSpan(span, err)
return errors.WithStack(err)
}
} else {
err := f.globalRollback(spanCtx, xid)
if err != nil {
tracing.RecordErrorSpan(span, err)
return errors.WithStack(err)
}
}
return nil
}
// handleHttp1BranchRegister return bool, represent whether continue
func (f *_httpFilter) handleHttp1BranchRegister(ctx context.Context, fastHttpCtx *fasthttp.RequestCtx, tccResource *TccResourceInfo) (bool, error) {
spanCtx, span := tracing.GetTraceSpan(ctx, tracing.BranchTransactionRegister)
defer span.End()
xid := fastHttpCtx.Request.Header.Peek(XID)
if string(xid) == "" {
fastHttpCtx.Response.Reset()
fastHttpCtx.SetStatusCode(http.StatusInternalServerError)
fastHttpCtx.SetBodyString(`{"success":false,"error":"failed to get XID from request header"}`)
return false, errors.New("failed to get XID from request header")
}
bodyBytes := fastHttpCtx.PostBody()
requestContext := &dt.RequestContext{
ActionContext: make(map[string]string),
Headers: make(map[string]string),
Body: bodyBytes,
}
fastHttpCtx.Request.Header.VisitAll(func(key, value []byte) {
requestContext.Headers[string(key)] = string(value)
})
requestContext.ActionContext[dt.VarHost] = fastHttpCtx.UserValue(dt.VarHost).(string)
requestContext.ActionContext[dt.CommitRequestPath] = tccResource.CommitRequestPath
requestContext.ActionContext[dt.RollbackRequestPath] = tccResource.RollbackRequestPath
queryString := fastHttpCtx.QueryArgs().QueryString()
if string(queryString) != "" {
requestContext.ActionContext[dt.VarQueryString] = string(queryString)
}
data, err := requestContext.Encode()
if err != nil {
fastHttpCtx.Response.Reset()
fastHttpCtx.SetStatusCode(http.StatusInternalServerError)
fastHttpCtx.SetBodyString(fmt.Sprintf(`{"success":false,"error":"encode request context failed, %v"}`, err))
tracing.RecordErrorSpan(span, err)
return false, errors.Errorf("encode request context failed, request context: %v, err: %v", requestContext, err)
}
transactionManager := dt.GetTransactionManager(f.conf.ApplicationID)
branchID, _, err := transactionManager.BranchRegister(spanCtx, &api.BranchRegisterRequest{
XID: string(xid),
ResourceID: string(fastHttpCtx.Request.RequestURI()),
LockKey: "",
BranchType: api.TCC,
ApplicationData: data,
})
if err != nil {
fastHttpCtx.Response.Reset()
fastHttpCtx.SetStatusCode(http.StatusInternalServerError)
fastHttpCtx.SetBodyString(fmt.Sprintf(`{"success":false,"error":"branch transaction register failed, %v"}`, err))
tracing.RecordErrorSpan(span, err)
return false, errors.Errorf("branch transaction register failed, XID: %s, err: %v", xid, err)
}
fastHttpCtx.SetUserValue(XID, string(xid))
fastHttpCtx.SetUserValue(BranchID, branchID)
return true, nil
}
func (f *_httpFilter) handleHttp1BranchEnd(ctx context.Context, fastHttpCtx *fasthttp.RequestCtx) error {
spanCtx, span := tracing.GetTraceSpan(ctx, tracing.BranchTransactionEnd)
defer span.End()
branchIDParam := fastHttpCtx.UserValue(BranchID)
branchID := branchIDParam.(string)
if fastHttpCtx.Response.StatusCode() != http.StatusOK {
transactionManager := dt.GetTransactionManager(f.conf.ApplicationID)
err := transactionManager.BranchReport(spanCtx, branchID, api.PhaseOneFailed)
if err != nil {
tracing.RecordErrorSpan(span, err)
return errors.WithStack(err)
}
}
return nil
}
func (f *_httpFilter) globalCommit(ctx context.Context, xid string) error {
var (
err error
status api.GlobalSession_GlobalStatus
)
spanCtx, span := tracing.GetTraceSpan(ctx, tracing.GlobalTransactionCommit)
defer span.End()
transactionManager := dt.GetTransactionManager(f.conf.ApplicationID)
status, err = transactionManager.Commit(spanCtx, xid)
if err != nil {
tracing.RecordErrorSpan(span, err)
}
log.Infof("[%s] commit status: %s", xid, status.String())
return err
}
func (f *_httpFilter) globalRollback(ctx context.Context, xid string) error {
var (
err error
status api.GlobalSession_GlobalStatus
)
spanCtx, span := tracing.GetTraceSpan(ctx, tracing.GlobalTransactionRollback)
defer span.End()
transactionManager := dt.GetTransactionManager(f.conf.ApplicationID)
status, err = transactionManager.Rollback(spanCtx, xid)
if err != nil {
tracing.RecordErrorSpan(span, err)
}
log.Infof("[%s] rollback status: %s", xid, status.String())
return err
}