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Merge pull request #4 from kayac/feature/add-parser-flag-for-cloudfro…
…nt-log add CloudFront Standard Log Parser
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package router | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "log" | ||
| ) | ||
|
|
||
| // LF represents LineFeed \n | ||
| var LF = []byte("\n") | ||
|
|
||
| type noneEncoder struct { | ||
| body buffer | ||
| } | ||
|
|
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| func newNoneEncoder(body buffer) encoder { | ||
| return &noneEncoder{ | ||
| body: body, | ||
| } | ||
| } | ||
|
|
||
| func (e *noneEncoder) Encode(_ record, recordBytes []byte) error { | ||
| if _, err := e.body.Write(recordBytes); err != nil { | ||
| return err | ||
| } | ||
| _, err := e.body.Write(LF) | ||
| return err | ||
| } | ||
|
|
||
| func (e *noneEncoder) Buffer() buffer { | ||
| return e.body | ||
| } | ||
|
|
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| type jsonEncoder struct { | ||
| body buffer | ||
| } | ||
|
|
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| func newJSONEncoder(body buffer) encoder { | ||
| return &jsonEncoder{ | ||
| body: body, | ||
| } | ||
| } | ||
|
|
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| func (e *jsonEncoder) Encode(rec record, _ []byte) error { | ||
|
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| bytes, err := json.Marshal(rec) | ||
| if err != nil { | ||
| log.Println("[warn] failed to generate json record", err) | ||
| return err | ||
| } | ||
| if _, err := e.body.Write(bytes); err != nil { | ||
| return err | ||
| } | ||
| _, err = e.body.Write(LF) | ||
| return err | ||
| } | ||
|
|
||
| func (e *jsonEncoder) Buffer() buffer { | ||
| return e.body | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package router | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
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| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| const ( | ||
| defaultCloudFrontNumColumns = 33 | ||
| ) | ||
|
|
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| //recordParser predefined errors | ||
| var ( | ||
| SkipLine = errors.New("Please skip this line.") | ||
| ) | ||
|
|
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| type recordParserFunc func([]byte, *record) error | ||
|
|
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| func (p recordParserFunc) Parse(bs []byte, r *record) error { | ||
| return p(bs, r) | ||
| } | ||
|
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| type cloudfrontParser struct { | ||
| version string | ||
| fields []string | ||
| } | ||
|
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| func (p *cloudfrontParser) Parse(bs []byte, r *record) error { | ||
| str := string(bs) | ||
| rec := make(record, defaultCloudFrontNumColumns) | ||
| *r = rec | ||
| if str[0] == '#' { | ||
| part := strings.SplitN(str[1:], ":", 2) | ||
| if len(part) != 2 { | ||
| return SkipLine | ||
| } | ||
| key := strings.TrimSpace(part[0]) | ||
| value := strings.TrimSpace(part[1]) | ||
| switch key { | ||
| case "Version": | ||
| p.version = value | ||
| case "Fields": | ||
| rawFields := strings.Split(value, " ") | ||
| //convert to snake case | ||
| fields := make([]string, 0, len(rawFields)) | ||
| replaceTargets := []string{"(", ")", "-"} | ||
| for _, rawField := range rawFields { | ||
| field := rawField | ||
| for _, target := range replaceTargets { | ||
| field = strings.ReplaceAll(field, target, "_") | ||
| } | ||
| field = strings.ToLower(field) | ||
| field = strings.TrimRight(field, "_") | ||
| fields = append(fields, field) | ||
| } | ||
| p.fields = fields | ||
| } | ||
| return SkipLine | ||
| } | ||
| values := strings.Split(str, "\t") | ||
| if len(values) > len(p.fields) { | ||
| return fmt.Errorf("this row has more values than fields, num of values = %d, num of feilds = %d", len(values), len(p.fields)) | ||
| } | ||
| var dateValue, timeValue string | ||
| for i, field := range p.fields { | ||
| rec[field] = values[i] | ||
| if field == "date" { | ||
| dateValue = values[i] | ||
| } | ||
| if field == "time" { | ||
| timeValue = values[i] | ||
| } | ||
| } | ||
| rec["datetime"] = dateValue + "T" + timeValue + "Z" | ||
| return nil | ||
| } |
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