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Go语言学习笔记7——错误处理和资源管理

PolarDay. 发布时间：2022-01-15 01:02:47 ，浏览量：5

Go语言编程思想3——错误处理和资源管理

资源管理：及时关闭文件，及时释放资源，如果打开的文件还未关闭就因为出错而在中间跳出，就无法保证有效的资源管理，因此在这里两者一起进行考虑

一、defer调用

调用在函数结束时发生（在return/panic之前执行）
参数在defer语句时计算
defer列表为先进后出（先defer的后执行）

func tryDefer() {
	for i := 0; i


    
        
            
                
                
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	    基本
        文件
        流程
        错误
        SQL
        调试
    

		    
    
	请求信息 : 2025-08-18 01:55:13 HTTP/2.0 GET : /home/article/detail/id/426521.html
运行时间 : 0.0739s ( Load:0.0192s Init:0.0024s Exec:0.0325s Template:0.0198s )
吞吐率 : 13.53req/s
内存开销 : 1,919.30 kb
查询信息 : 16 queries 0 writes 
文件加载 : 36
缓存信息 : 5 gets 0 writes 
配置加载 : 132
会话信息 : SESSION_ID=hbmdstv2m6ki3uadpsg0v7scsc
    
    
        
    
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	[ app_init ] --START--
Run Behavior\BuildLiteBehavior [ RunTime:0.000019s ]
[ app_init ] --END-- [ RunTime:0.000087s ]
[ app_begin ] --START--
Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000866s ]
[ app_begin ] --END-- [ RunTime:0.000945s ]
[ view_parse ] --START--
[ template_filter ] --START--
Run Behavior\ContentReplaceBehavior [ RunTime:0.000106s ]
[ template_filter ] --END-- [ RunTime:0.000176s ]
Run Behavior\ParseTemplateBehavior [ RunTime:0.015087s ]
[ view_parse ] --END-- [ RunTime:0.015149s ]
[ view_filter ] --START--
Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000491s ]
[ view_filter ] --END-- [ RunTime:0.000527s ]
[ app_end ] --START--
    
    
        
    
	[2] session_save_path(): open_basedir restriction in effect. File(/var/lib/php/session) is not within the allowed path(s): (/www/wwwroot/www.chaojiit.com/:/tmp/) /www/wwwroot/www.chaojiit.com/ThinkPHP/Common/functions.php 第 1239 行.
[8192] Array and string offset access syntax with curly braces is deprecated /www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 37 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 98 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 98 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 99 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 99 行.
[8] Undefined variable: pinglun_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 108 行.
    
    
        
    
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SHOW COLUMNS FROM `article_content` [ RunTime:0.0008s ]
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0.0739s