在 Vue 客户端中将日志文件数据转换为 Json 对象
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【中文标题】在 Vue 客户端中将日志文件数据转换为 Json 对象【英文标题】：Convert log File Data to Json Object in Vue client 【发布时间】：2021-12-16 16:32:36 【问题描述】：我有一个日志文件如下：
"L":"DEBUG","T":"2021-11-01T17:37:54.167+0530","M":"Route.go:74[IN : GetLatestLogs]"
"L":"DEBUG","T":"2021-11-01T17:37:54.167+0530","M":"Service.go:40[IN : GetRecentServerErrorLogService]"
"L":"DEBUG","T":"2021-11-01T17:37:54.167+0530","M":"DAO.go:117[IN : GetRecentServerErrorLogDAO]"
"L":"DEBUG","T":"2021-11-01T17:37:54.168+0530","M":"DAO.go:148[OUT : GetRecentServerErrorLogDAO]"
"L":"DEBUG","T":"2021-11-01T17:37:54.168+0530","M":"Service.go:47[OUT : GetRecentServerErrorLogService]"
"L":"DEBUG","T":"2021-11-01T17:37:54.168+0530","M":"Route.go:79[OUT : GetLatestLogs]"
"L":"DEBUG","T":"2021-11-01T17:40:55.331+0530","M":"Route.go:74[IN : GetLatestLogs]"
我在 Golang 回显服务器中读取这个文件如下：
file, err := os.Open(logFilePath)
stat, _ := os.Stat(logFilePath)
buf := make([]byte, stat.Size())
_, err = file.Read(buf)
serverLog := string(buf)
并返回这个生成的字符串
return c.JSON(http.StatusOK, serverLog)
这是我得到的结果
"\"L\":\"DEBUG\",\"T\":\"2021-11-01T17:37:54.167+0530\",\"M\":\"Route.go:74[IN : GetLatestLogs]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-01T17:37:54.167+0530\",\"M\":\"Service.go:40[IN : GetRecentServerErrorLogService]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-01T17:37:54.167+0530\",\"M\":\"DAO.go:117[IN : GetRecentServerErrorLogDAO]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-01T17:37:54.168+0530\",\"M\":\"DAO.go:148[OUT : GetRecentServerErrorLogDAO]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-01T17:37:54.168+0530\",\"M\":\"Service.go:47[OUT : GetRecentServerErrorLogService]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-01T17:37:54.168+0530\",\"M\":\"Route.go:79[OUT : GetLatestLogs]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-01T17:40:55.331+0530\",\"M\":\"Route.go:74[IN : GetLatestLogs]\"\"L\":\"DEBUG\",\"T\":\"2021-11-02T09:48:49.982+0530\",\"M\":\"controlPanelRoute.go:74[IN : GetLatestLogs]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-02T09:48:49.982+0530\",\"M\":\"controlPanelService.go:40[IN : GetRecentServerErrorLogService]\"\n\"L\":\"DEBUG\",\"T\":\"2021-11-02T09:48:49.982+0530\",\"M\":\"controlPanelDAO.go:117[IN : GetRecentServerErrorLogDAO]\"\n"
我想将此收到的响应转换为 JSON 对象。
这是我想要的输出：
[
"L": "DEBUG",
"T": "2021-11-01T17:37:54.167+0530",
"M": "Route.go:74[IN : GetLatestLogs]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.167+0530",
"M": "Service.go:40[IN : GetRecentServerErrorLogService]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.167+0530",
"M": "DAO.go:117[IN : GetRecentServerErrorLogDAO]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.168+0530",
"M": "DAO.go:148[OUT : GetRecentServerErrorLogDAO]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.168+0530",
"M": "Service.go:47[OUT : GetRecentServerErrorLogService]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.168+0530",
"M": "Route.go:79[OUT : GetLatestLogs]"
,
"L": "DEBUG",
"T": "2021-11-01T17:40:55.331+0530",
"M": "Route.go:74[IN : GetLatestLogs]"
]
【问题讨论】：
【参考方案1】：这看起来像是一个接一个有效的 Json 语句。您可以打开该文件，使用json.NewDecoder(filehandle) 创建一个解码器，然后读取一个 Json 语句（如果它一个接一个）。这是输入硬编码的示例：
package main
import (
"fmt"
"bytes"
"io"
"encoding/json"
)
var input =[]byte( `"L":"DEBUG","T":"2021-11-01T17:37:54.167+0530","M":"Route.go:74[IN : GetLatestLogs]"
"L":"DEBUG","T":"2021-11-01T17:37:54.167+0530","M":"Service.go:40[IN : GetRecentServerErrorLogService]"
"L":"DEBUG","T":"2021-11-01T17:37:54.167+0530","M":"DAO.go:117[IN : GetRecentServerErrorLogDAO]"
"L":"DEBUG","T":"2021-11-01T17:37:54.168+0530","M":"DAO.go:148[OUT : GetRecentServerErrorLogDAO]"
"L":"DEBUG","T":"2021-11-01T17:37:54.168+0530","M":"Service.go:47[OUT : GetRecentServerErrorLogService]"
"L":"DEBUG","T":"2021-11-01T17:37:54.168+0530","M":"Route.go:79[OUT : GetLatestLogs]"
"L":"DEBUG","T":"2021-11-01T17:40:55.331+0530","M":"Route.go:74[IN : GetLatestLogs]"`)
func main()
r := json.NewDecoder(bytes.NewBuffer(input))
var data interface
for i := 0;;i++
if err := r.Decode(&data); err != nil
if err == io.EOF
break
panic(err)
else
fmt.Printf("%d: %+v\n", i, data)
输出应该是：
0: map[L:DEBUG M:Route.go:74[IN : GetLatestLogs] T:2021-11-01T17:37:54.167+0530]
1: map[L:DEBUG M:Service.go:40[IN : GetRecentServerErrorLogService] T:2021-11-01T17:37:54.167+0530]
2: map[L:DEBUG M:DAO.go:117[IN : GetRecentServerErrorLogDAO] T:2021-11-01T17:37:54.167+0530]
3: map[L:DEBUG M:DAO.go:148[OUT : GetRecentServerErrorLogDAO] T:2021-11-01T17:37:54.168+0530]
4: map[L:DEBUG M:Service.go:47[OUT : GetRecentServerErrorLogService] T:2021-11-01T17:37:54.168+0530]
5: map[L:DEBUG M:Route.go:79[OUT : GetLatestLogs] T:2021-11-01T17:37:54.168+0530]
6: map[L:DEBUG M:Route.go:74[IN : GetLatestLogs] T:2021-11-01T17:40:55.331+0530]
如您所见，Decode() 停在 Json 表达式的末尾，因此您可以一遍又一遍地继续阅读。
【讨论】：
【参考方案2】：file, err := os.Open("/log/file/path")
if err != nil
panic(err)
info, err := file.Stat()
if err != nil
panic(err)
logs := make(json.RawMessage, 1, info.Size()+1) // len=1 for '['
dec := json.NewDecoder(file)
for dec.More()
var log json.RawMessage
if err := dec.Decode(&log); err != nil
panic(err)
logs = append(logs, log...)
logs = append(logs, ',')
if n := len(logs); n > 1
logs[0], logs[n-1] = '[', ']'
c.JSON(http.StatusOK, logs)
【讨论】：
【参考方案3】：从您的代码看来，您依赖 Gin 为您进行转换：
return c.JSON(http.StatusOK, serverLog)
您实际上可以自己处理它，但它可能需要逐行解组，因为日志文本文件不是有效的 JSON 数组。然后我将有效结构编组回 JSON。在下面的示例中，我使用 bufio 逐行读取文本文件，并解组为 Log 结构：
package main
import (
"os"
"fmt"
"encoding/json"
"bufio"
)
type Log struct
L string
T string
M string
func main()
f, err := os.Open("log.txt")
defer f.Close()
var logs []Log
var log Log
input := bufio.NewScanner(f)
for input.Scan()
textByte := []byte(input.Text())
err = json.Unmarshal(textByte, &log)
if err != nil
fmt.Printf("Problems with unmarshalling: %v\n", err)
os.Exit(1)
logs = append(logs, log)
data, err := json.MarshalIndent(logs, "", " ")
if err != nil
fmt.Printf("Error in marshalling: %v\n", err)
os.Exit(1)
fmt.Printf("%s\n", data)
或者你可以从函数中返回字符串：
return fmt.Sprintf("%s\n", data)
这是输出：
[
"L": "DEBUG",
"T": "2021-11-01T17:37:54.167+0530",
"M": "Route.go:74[IN : GetLatestLogs]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.167+0530",
"M": "Service.go:40[IN : GetRecentServerErrorLogService]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.167+0530",
"M": "DAO.go:117[IN : GetRecentServerErrorLogDAO]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.168+0530",
"M": "DAO.go:148[OUT : GetRecentServerErrorLogDAO]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.168+0530",
"M": "Service.go:47[OUT : GetRecentServerErrorLogService]"
,
"L": "DEBUG",
"T": "2021-11-01T17:37:54.168+0530",
"M": "Route.go:79[OUT : GetLatestLogs]"
,
"L": "DEBUG",
"T": "2021-11-01T17:40:55.331+0530",
"M": "Route.go:74[IN : GetLatestLogs]"
]
【讨论】：
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