折騰：

【已解決】go語言中實現(xiàn)log信息同時輸出到文件和控制臺(命令行）

期間，已經(jīng)通過io的MultiWriter搞定了同時輸出信息到文件和console，但是不支持level。

所以，再去試試這個log4go。

github.com/keepeye/log4go

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【折騰過程】

1.大概看了看，貌似功能很強大。

有點類似于之前的C#的NLog，為C#的log功能擴展；

此處log4go，是針對go語言的log功能的擴展。

2.此log4go，是go語言的第三方的包，所以，先要去搞懂：

【記錄】go語言中安裝第三方包package（庫）：log4go

3.安裝完畢后，再去參考官網(wǎng)的：

http://code.google.com/p/log4go/wiki/GettingStarted

去看看如何使用。

4.先去導(dǎo)入：

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1 2	//import l4g "log4go.googlecode.com/hg" import l4g "code.google.com/p/log4go"

結(jié)果是：

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1 2 3

E:\Dev_Root\go\src\EmulateLoginBaidu>go run EmulateLoginBaidu.go # command-line-arguments .\EmulateLoginBaidu.go:34: imported and not used: "code.google.com/p/log4go"

這說明：

正確導(dǎo)入了（但只是暫時還沒去使用而已）

5.接著去使用。

用如下代碼：

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//do some init for crifanLib func initCrifanLib(){ ????l4g.Info("init for crifanLib") ????//gLogger.Println("init for crifanLib"); ????gCurCookies = nil ????return } //init for logger func initLogger(){ ????l4g.Debug("in initLogger")

效果是：

6.看到其解釋了：

上述用的，是默認(rèn)的，已經(jīng)實現(xiàn)了的，對于console的log

默認(rèn)配置為：DEBUG的level：debug及以上的level都顯示。

所有的level，依次是：Finest, Fine, Debug, Trace, Info, Warning, Error, Critical

而此處，我想要實現(xiàn)：

（1）重新更改此console的level為Info

（2）添加此處的log文件作為輸出，且設(shè)置level所有，即最低一級的Finest

7.先去添加log文件：

但是想要去看對應(yīng)的文檔的，結(jié)果原先作者的說明：

先去：

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1	godoc -http=:6060

（我此處實際上本身已經(jīng)打開godoc的server了）

再去打開地址：

http://localhost:6060/pkg/log4go.googlecode.com/svn/stable/

結(jié)果肯定不對的。

后來經(jīng)過自己的分析，去訪問：

http://localhost:6060/pkg/code.google.com/p/log4go/

就可以了。

8.去看看對應(yīng)的：

http://localhost:6060/pkg/code.google.com/p/log4go/#AddFilter

內(nèi)容是：

func?AddFilter func AddFilter(name string, lvl level, writer LogWriter) Wrapper for (*Logger).AddFilter?

去試試代碼。

結(jié)果基本實現(xiàn)了所要的效果：

即：

對于代碼中debug信息，只在文件中顯示

對于info及以上的信息，console和文件，都顯示。

實現(xiàn)了level的自定義。

9.目前，唯一一個小問題，不是我喜歡的：

對于，我經(jīng)常調(diào)試程序，

希望每次重新運行時，對于log文件，都自動清空。

而不要對于log文件是APPEND模式：

每次的輸出，都添加到后面。

而不清空log文件。

10.所以，再去想辦法，新建log時，判斷是否已經(jīng)存在文件，如果存在去刪除掉：

【已解決】go語言中判斷文件是否存在如果有已存在則刪除

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【總結(jié)】

最終，基本實現(xiàn)了全部的效果：

1.每次運行程序，可以O(shè)VERWRITE舊的log文件，而不是APPEND

2.可以同時輸出內(nèi)容到log文件和console

3.且console和log文件的輸出level都可以配置：

此處要的是：

INFO及以上的，都可以在console中顯示；

全部信息（包括debug），都可以在log文件中顯示。

全部代碼如下：

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171

/* ?* [File] ?* EmulateLoginBaidu.go ?* ?* [Function] ?* 【記錄】用go語言實現(xiàn)模擬登陸百度 ?* http://www.crifan.com/emulate_login_baidu_using_go_language/ ?* ?* [Version] ?* 2013-09-19 ?* ?* [Contact] ?* http://www.crifan.com/about/me/ ?*/ package main import ( ????//"fmt" ????//"builtin" ????//"log" ????"os" ????"runtime" ????"path" ????"strings" ????//"io" ????"time" ????"io/ioutil" ????"net/http" ????//"net/http/cookiejar" ????//"sync" ????//"net/url" ) //import l4g "log4go.googlecode.com/hg" //import l4g "code.google.com/p/log4go" import " github.com/keepeye/log4go " /*************************************************************************************************** ????Global Variables ***************************************************************************************************/ var gCurCookies []*http.Cookie; //var gLogger *log.Logger; var gLogger log4go.Logger; /*************************************************************************************************** ????Functions ***************************************************************************************************/ //do init before all others func initAll(){ ????gCurCookies = nil ????gLogger = nil ????? ????initLogger() ????initCrifanLib() } //de-init for all func deinitAll(){ ????gCurCookies = nil ????if(nil == gLogger) { ????????gLogger.Close(); ????????gLogger = nil ????} } //do some init for crifanLib func initCrifanLib(){ ????gLogger.Debug("init for crifanLib") ????gCurCookies = nil ????return } //init for logger func initLogger(){ ????var filenameOnly string ????filenameOnly = GetCurFilename() ????var logFilename string =? filenameOnly + ".log"; ????? ????//gLogger = log4go.NewLogger() ????gLogger = make(log4go.Logger) ????//for console ????//gLogger.AddFilter("stdout", log4go.INFO, log4go.NewConsoleLogWriter()) ????gLogger.AddFilter("stdout", log4go.INFO, log4go.NewConsoleLogWriter()) ????//for log file ????if _, err := os.Stat(logFilename); err == nil { ????????//fmt.Printf("found old log file %s, now remove it\n", logFilename) ????????os.Remove(logFilename) ????} ????//gLogger.AddFilter("logfile", log4go.FINEST, log4go.NewFileLogWriter(logFilename, true)) ????gLogger.AddFilter("logfile", log4go.FINEST, log4go.NewFileLogWriter(logFilename, false)) ????gLogger.Info("Current time is : %s", time.Now().Format("15:04:05 MST 2006/01/02")) ????return } // GetCurFilename // Get current file name, without suffix func GetCurFilename() string { ????_, fulleFilename, _, _ := runtime.Caller(0) ????//fmt.Println(fulleFilename) ????var filenameWithSuffix string ????filenameWithSuffix = path.Base(fulleFilename) ????//fmt.Println("filenameWithSuffix=", filenameWithSuffix) ????var fileSuffix string ????fileSuffix = path.Ext(filenameWithSuffix) ????//fmt.Println("fileSuffix=", fileSuffix) ????? ????var filenameOnly string ????filenameOnly = strings.TrimSuffix(filenameWithSuffix, fileSuffix) ????//fmt.Println("filenameOnly=", filenameOnly) ????? ????return filenameOnly } //get url response html func GetUrlRespHtml(url string) string{ ????gLogger.Debug("GetUrlRespHtml, url=%s", url) ????var respHtml string = ""; ????? ????resp, err := http.Get(url) ????if err != nil { ????????gLogger.Warn("http get url=%s response errror=%s\n", url, err) ????} ????defer resp.Body.Close() ????body, err := ioutil.ReadAll(resp.Body) ????//gLogger.Debug("body=%s\n", body) ????gCurCookies = resp.Cookies() ????? ????respHtml = string(body) ????return respHtml } func printCurCookies() { ????var cookieNum int = len(gCurCookies); ????gLogger.Info("cookieNum=%d", cookieNum) ????for i := 0; i < cookieNum; i++ { ????????var curCk *http.Cookie = gCurCookies[i]; ????????//gLogger.Info("curCk.Raw=%s", curCk.Raw) ????????gLogger.Info("------ Cookie [%d]------", i) ????????gLogger.Info("Name\t=%s", curCk.Name) ????????gLogger.Info("Value\t=%s", curCk.Value) ????????gLogger.Info("Path\t=%s", curCk.Path) ????????gLogger.Info("Domain\t=%s", curCk.Domain) ????????gLogger.Info("Expires\t=%s", curCk.Expires) ????????gLogger.Info("RawExpires=%s", curCk.RawExpires) ????????gLogger.Info("MaxAge\t=%d", curCk.MaxAge) ????????gLogger.Info("Secure\t=%t", curCk.Secure) ????????gLogger.Info("HttpOnly=%t", curCk.HttpOnly) ????????gLogger.Info("Raw\t=%s", curCk.Raw) ????????gLogger.Info("Unparsed=%s", curCk.Unparsed) ????} } func main() { ????initAll() ????gLogger.Info("this is EmulateLoginBaidu.go") ????var baiduMainUrl string ????baiduMainUrl = "http://www.baidu.com/"; ????//baiduMainUrl := "http://www.baidu.com/"; ????//var baiduMainUrl string = "http://www.baidu.com/"; ????gLogger.Info("baiduMainUrl=%s", baiduMainUrl) ????respHtml := GetUrlRespHtml(baiduMainUrl) ????gLogger.Debug("respHtml=%s", respHtml) ????printCurCookies() ????? ????deinitAll() }

效果是：

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console中輸出的內(nèi)容：

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

E:\Dev_Root\go\src\EmulateLoginBaidu>go run EmulateLoginBaidu.go [09/20/13 18:39:40] [INFO] Current time is : 18:39:40 +0800 2013/09/20 [09/20/13 18:39:40] [INFO] this is EmulateLoginBaidu.go [09/20/13 18:39:40] [INFO] baiduMainUrl=http://www.baidu.com/ [09/20/13 18:39:40] [INFO] cookieNum=3 [09/20/13 18:39:40] [INFO] ------ Cookie [0]------ [09/20/13 18:39:40] [INFO] Name =BDSVRTM [09/20/13 18:39:40] [INFO] Value??????? =3 [09/20/13 18:39:40] [INFO] Path =/ [09/20/13 18:39:40] [INFO] Domain?????? = [09/20/13 18:39:40] [INFO] Expires????? =0001-01-01 00:00:00 +0000 UTC [09/20/13 18:39:40] [INFO] RawExpires= [09/20/13 18:39:40] [INFO] MaxAge?????? =0 [09/20/13 18:39:40] [INFO] Secure?????? =false [09/20/13 18:39:40] [INFO] HttpOnly=false [09/20/13 18:39:40] [INFO] Raw? =BDSVRTM=3; path=/ [09/20/13 18:39:40] [INFO] Unparsed=[] [09/20/13 18:39:40] [INFO] ------ Cookie [1]------ [09/20/13 18:39:40] [INFO] Name =H_PS_PSSID [09/20/13 18:39:40] [INFO] Value??????? =3415_1431_2975_2981 [09/20/13 18:39:40] [INFO] Path =/ [09/20/13 18:39:40] [INFO] Domain?????? =.baidu.com [09/20/13 18:39:40] [INFO] Expires????? =0001-01-01 00:00:00 +0000 UTC [09/20/13 18:39:40] [INFO] RawExpires= [09/20/13 18:39:40] [INFO] MaxAge?????? =0 [09/20/13 18:39:40] [INFO] Secure?????? =false [09/20/13 18:39:40] [INFO] HttpOnly=false [09/20/13 18:39:40] [INFO] Raw? =H_PS_PSSID=3415_1431_2975_2981; path=/; domain=.baidu.com [09/20/13 18:39:40] [INFO] Unparsed=[] [09/20/13 18:39:40] [INFO] ------ Cookie [2]------ [09/20/13 18:39:40] [INFO] Name =BAIDUID [09/20/13 18:39:40] [INFO] Value??????? =AF99372EE54C9816618EED94475DDD26:FG=1 [09/20/13 18:39:40] [INFO] Path =/ [09/20/13 18:39:40] [INFO] Domain?????? =.baidu.com [09/20/13 18:39:40] [INFO] Expires????? =0001-01-01 00:00:00 +0000 UTC [09/20/13 18:39:40] [INFO] RawExpires=Fri, 20-Sep-43 10:39:32 GMT E:\Dev_Root\go\src\EmulateLoginBaidu>

log文件中輸出的內(nèi)容：

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[2013/09/20 18:39:40 ] [INFO] (main.initLogger:91) Current time is : 18:39:40 +0800 2013/09/20 [2013/09/20 18:39:40 ] [DEBG] (main.initCrifanLib:68) init for crifanLib [2013/09/20 18:39:40 ] [INFO] (main.main:159) this is EmulateLoginBaidu.go [2013/09/20 18:39:40 ] [INFO] (main.main:165) baiduMainUrl=http://www.baidu.com/ [2013/09/20 18:39:40 ] [DEBG] (main.GetUrlRespHtml:117) GetUrlRespHtml, url=http://www.baidu.com/ [2013/09/20 18:39:40 ] [DEBG] (main.main:167) respHtml=<!DOCTYPE html><!--STATUS OK--><html><head><meta http-equiv="content-type" content="text/html;charset=utf-8"><title>百度一下，你就知道</title><style >html,.......... new Date(_t + 10000).toGMTString()})}catch(e){}</script></html><!--0556c44ca22cac33--> [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:137) cookieNum=3 [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:141) ------ Cookie [0]------ [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:142) Name?? =BDSVRTM [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:143) Value? =3 [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:144) Path?? =/ [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:145) Domain = [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:146) Expires??? =0001-01-01 00:00:00 +0000 UTC [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:147) RawExpires= [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:148) MaxAge =0 [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:149) Secure =false [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:150) HttpOnly=false [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:151) Raw??? =BDSVRTM=3; path=/ [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:152) Unparsed=[] [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:141) ------ Cookie [1]------ [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:142) Name?? =H_PS_PSSID [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:143) Value? =3415_1431_2975_2981 [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:144) Path?? =/ [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:145) Domain =.baidu.com [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:146) Expires??? =0001-01-01 00:00:00 +0000 UTC [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:147) RawExpires= [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:148) MaxAge =0 [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:149) Secure =false [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:150) HttpOnly=false [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:151) Raw??? =H_PS_PSSID=3415_1431_2975_2981; path=/; domain=.baidu.com [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:152) Unparsed=[] [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:141) ------ Cookie [2]------ [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:142) Name?? =BAIDUID [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:143) Value? =AF99372EE54C9816618EED94475DDD26:FG=1 [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:144) Path?? =/ [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:145) Domain =.baidu.com [2013/09/20 18:39:40 ] [INFO] (main.printCurCookies:146) Expires??? =0001-01-01 00:00:00 +0000 UTC

整體效果還不錯的說。

轉(zhuǎn)載于:https://www.cnblogs.com/mafeng/p/6839592.html

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