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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| // Copyright 2021 FerretDB 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 wire | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "errors" | ||
| "io/fs" | ||
| "math/rand" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/FerretDB/FerretDB/internal/util/lazyerrors" | ||
| ) | ||
|
|
||
| // Record represents a single recorded wire protocol message, loaded from a .bin file. | ||
| type Record struct { | ||
| Header *MsgHeader | ||
| Body MsgBody | ||
| HeaderB []byte | ||
| BodyB []byte | ||
| } | ||
|
|
||
| // LoadRecords finds all .bin files recursively, selects up to the limit at random (or all if limit <= 0), and parses them. | ||
| func LoadRecords(dir string, limit int) ([]Record, error) { | ||
| var files []string | ||
| err := filepath.WalkDir(dir, func(path string, entry fs.DirEntry, err error) error { | ||
| if err != nil { | ||
| return lazyerrors.Error(err) | ||
| } | ||
|
|
||
| if filepath.Ext(entry.Name()) == ".bin" { | ||
| files = append(files, path) | ||
| } | ||
|
|
||
| return nil | ||
| }) | ||
|
|
||
| switch { | ||
| case errors.Is(err, fs.ErrNotExist): | ||
| return nil, nil | ||
| case err != nil: | ||
| return nil, lazyerrors.Error(err) | ||
| } | ||
|
|
||
| if limit > 0 && len(files) > limit { | ||
| f := make([]string, limit) | ||
| for fI, filesI := range rand.Perm(len(files))[:limit] { | ||
| f[fI] = files[filesI] | ||
| } | ||
| files = f | ||
| } | ||
|
|
||
| var res []Record | ||
|
|
||
| for _, file := range files { | ||
| r, err := loadRecordFile(file) | ||
| if err != nil { | ||
| return nil, lazyerrors.Errorf("%s: %w", file, err) | ||
| } | ||
|
|
||
| res = append(res, r...) | ||
| } | ||
|
|
||
| return res, nil | ||
| } | ||
|
|
||
| // loadRecordFile parses a single .bin file. | ||
| func loadRecordFile(file string) ([]Record, error) { | ||
| f, err := os.Open(file) | ||
| if err != nil { | ||
| return nil, lazyerrors.Error(err) | ||
| } | ||
|
|
||
| defer f.Close() //nolint:errcheck // we are only reading it | ||
|
|
||
| r := bufio.NewReader(f) | ||
|
|
||
| var res []Record | ||
|
|
||
| for { | ||
| header, body, err := ReadMessage(r) | ||
| if errors.Is(err, ErrZeroRead) { | ||
| break | ||
| } | ||
|
|
||
| if err != nil { | ||
| return nil, lazyerrors.Error(err) | ||
| } | ||
|
|
||
| headerB, err := header.MarshalBinary() | ||
| if err != nil { | ||
| return nil, lazyerrors.Error(err) | ||
| } | ||
|
|
||
| bodyB, err := body.MarshalBinary() | ||
| if err != nil { | ||
| return nil, lazyerrors.Error(err) | ||
| } | ||
|
|
||
| res = append(res, Record{ | ||
| Header: header, | ||
| Body: body, | ||
| HeaderB: headerB, | ||
| BodyB: bodyB, | ||
| }) | ||
| } | ||
|
|
||
| return res, nil | ||
| } |
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