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/
exec_parser.go
163 lines (136 loc) · 3.2 KB
/
exec_parser.go
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package workers
import (
"encoding/json"
"errors"
"io/ioutil"
"os"
"path"
"strconv"
"strings"
"github.com/ProgrammingLab/koneko-online-judge/server/logger"
)
type ExecResultParser struct {
index int
outputs map[int]os.FileInfo
outputDir string
results map[int]os.FileInfo
resDir string
length int
}
var ErrExecResultParse = errors.New("exec result parse error")
func NewExecResultParser(w *Worker) (ExecResultParser, error) {
runErr, err := getRunnerError(w)
if err != nil {
return ExecResultParser{}, err
}
if len(strings.TrimSpace(runErr)) != 0 {
logger.AppLog.Error(runErr)
return ExecResultParser{}, errors.New(runErr)
}
outputDir := w.HostJudgeDataDir + "/output"
outputs, err := ioutil.ReadDir(outputDir)
if err != nil {
logger.AppLog.Error(err)
return ExecResultParser{}, err
}
outputMap, err := toFileInfoMap(outputs)
if err != nil {
logger.AppLog.Error(err)
return ExecResultParser{}, err
}
resDir := w.HostJudgeDataDir + "/status"
results, err := ioutil.ReadDir(resDir)
if err != nil {
logger.AppLog.Error(err)
return ExecResultParser{}, err
}
resultMap, err := toFileInfoMap(results)
if err != nil {
logger.AppLog.Error(err)
return ExecResultParser{}, err
}
if len(outputMap) != len(resultMap) {
logger.AppLog.Error(ErrExecResultParse)
return ExecResultParser{}, ErrExecResultParse
}
return ExecResultParser{
outputs: outputMap,
outputDir: outputDir,
results: resultMap,
resDir: resDir,
length: len(outputMap),
}, nil
}
func toFileInfoMap(files []os.FileInfo) (map[int]os.FileInfo, error) {
res := make(map[int]os.FileInfo, len(files))
for _, f := range files {
base := path.Base(f.Name())
index, err := strconv.Atoi(base)
if err != nil {
return nil, err
}
res[index] = f
}
return res, nil
}
func getRunnerError(worker *Worker) (string, error) {
errFile := worker.HostJudgeDataDir + "/err"
res, err := ioutil.ReadFile(errFile)
if err != nil {
logger.AppLog.Error(err)
return "", err
}
return string(res), nil
}
func (p *ExecResultParser) Next() (bool, *ExecResult, error) {
if p.length <= p.index {
return false, nil, nil
}
execRes, err := p.parseCurrentExecResult()
if err != nil {
p.index = p.length
return false, nil, nil
}
fi, ok := p.outputs[p.index]
if !ok {
p.index = p.length
return false, nil, ErrExecResultParse
}
f, err := os.Open(p.outputDir + "/" + fi.Name())
if err != nil {
logger.AppLog.Error(err)
p.index = p.length
return false, nil, err
}
defer f.Close()
buf, err := ioutil.ReadAll(f)
if err != nil {
logger.AppLog.Error(err)
p.index = p.length
return false, nil, err
}
execRes.Stdout = string(buf)
p.index++
return p.index <= p.length, &execRes, nil
}
func (p *ExecResultParser) parseCurrentExecResult() (ExecResult, error) {
fi, ok := p.results[p.index]
if !ok {
logger.AppLog.Error(ErrExecResultParse)
return ExecResult{}, ErrExecResultParse
}
f, err := os.Open(p.resDir + "/" + fi.Name())
if err != nil {
logger.AppLog.Error(err)
return ExecResult{}, err
}
defer f.Close()
e := json.NewDecoder(f)
res := ExecResult{}
err = e.Decode(&res)
if err != nil {
logger.AppLog.Error(err)
return ExecResult{}, err
}
return res, nil
}