Javascript 如何减少抛出错误时的堆栈跟踪(指向调用站点)
我有这样一个函数:Javascript 如何减少抛出错误时的堆栈跟踪(指向调用站点),javascript,node.js,exception,stack-trace,Javascript,Node.js,Exception,Stack Trace,我有这样一个函数: function foo() { throw new Error('`foo` has been removed in favor of `bar`') } 当有人调用foo时,我希望堆栈跟踪(错误输出)指向foo的调用位置,而不是foo内部的throw行 例如,我得到了这个: $ node test.js /home/ubuntu/tmp/test.js:2 throw new Error('`foo` has been removed in favor of
function foo() {
throw new Error('`foo` has been removed in favor of `bar`')
}
当有人调用foo
时,我希望堆栈跟踪(错误输出)指向foo
的调用位置,而不是foo
内部的throw
行
例如,我得到了这个:
$ node test.js
/home/ubuntu/tmp/test.js:2
throw new Error('`foo` has been removed in favor of `bar`')
^
Error: `foo` has been removed in favor of `bar`
at foo (/home/ubuntu/tmp/test.js:2:9)
at Object.<anonymous> (/home/ubuntu/tmp/test.js:5:1)
...
$node test.js
/home/ubuntu/tmp/test.js:2
抛出新错误('foo'已被删除,取而代之的是'bar')
^
错误:`foo`已被删除,取而代之的是`bar'`
在foo(/home/ubuntu/tmp/test.js:2:9)
反对。(/home/ubuntu/tmp/test.js:5:1)
...
我该如何取而代之
$ node test.js
/home/ubuntu/tmp/test.js:5
foo()
^
Error: `foo` has been removed in favor of `bar`
at Object.<anonymous> (/home/ubuntu/tmp/test.js:5:1)
...
$node test.js
/home/ubuntu/tmp/test.js:5
foo()
^
错误:`foo`已被删除,取而代之的是`bar'`
反对。(/home/ubuntu/tmp/test.js:5:1)
...
步骤1:定义自定义错误对象。有关详细信息:
步骤2:使用域
捕获未捕获的错误。
function foo() {
throw new CustomError('`foo` has been removed in favorof `bar`');
};
var d = require('domain').create();
d.on('error', function(err) {
/*
* customize the output here.
*/
});
d.run(function() {
foo();
});
步骤3:自定义输出。结构化堆栈跟踪是一个CallSite对象数组,每个对象代表一个堆栈帧。CallSite对象定义了
如果您的目标是函数名匿名,那么这可能是错误的方法。但这就是您抛出错误的地方…请注意,只有节点才会这样做。相关:节点将这两行添加到输出中的代码。
function foo() {
throw new CustomError('`foo` has been removed in favorof `bar`');
};
var d = require('domain').create();
d.on('error', function(err) {
/*
* customize the output here.
*/
});
d.run(function() {
foo();
});
for(var index=0; index<err.stack.length; index++){
var frame = err.stack[index];
var unit = frame.getFunctionName() || frame.getMethodName();
if (unit === null) {
unit = 'function()';
} else {
unit += '()'
}
if (index === 0) {
console.error('%s:%d:%d\n %s\n ^',
frame.getFileName(),
frame.getLineNumber(),
frame.getColumnNumber(),
unit);
console.error('Error: ' + err.message);
} else {
console.error(' at %s (%s:%d:%d)',
unit,
frame.getFileName(),
frame.getLineNumber(),
frame.getColumnNumber());
};
}; // END. stack trace
/home/ray/dev/test/error.js:57:9
foo()
^
Error: `foo` has been removed in favorof `bar`
at function() (/home/ray/dev/test/error.js:53:3)
at b() (domain.js:183:18)
at Domain.run() (domain.js:123:23)
at function() (/home/ray/dev/test/error.js:52:3)
at Module._compile() (module.js:456:26)
at Module._extensions..js() (module.js:474:10)
at Module.load() (module.js:356:32)
at Module._load() (module.js:312:12)
at Module.runMain() (module.js:497:10)