发送JS错误日志到服务器

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var
logger = (function(){

    var
loghost = ‘http://127.0.0.1/log.gif?‘;

    var
log = function(err){

        var
img = new
Image(0,0);

        var
_url =[];

        _url.push(‘name‘+‘=‘+encodeURIComponent(err.name));

        _url.push(‘message‘+‘=‘+encodeURIComponent(err.message));

        _url.push(‘location‘+‘=‘+encodeURIComponent(err.location));

        if(err.line)

            _url.push(‘line‘+‘=‘+encodeURIComponent(err.line));

        if(err.func)

            _url.push(‘func‘+‘=‘+encodeURIComponent(err.func));

        var
url = _url.join(‘&‘);

        img.src = loghost+url;

        console.log(img.src);

    }

    return
{log:log};

})();

function
trapError(msg, URI, ln) {

    // wrap our unknown error condition in an object

    var
error = new
Error(msg);

    error.location = URI; // add custom property

    error.line = ln;

    logger.log(error);

    warnUser();

    return
true; // stop the yellow triangle

}

window.onerror = trapError;

function
foo() {

    try
{

        riskyOperation();

    } catch
(err) {

        // add custom property

        err.location = location.href;

        err.func = ‘foo‘;

        logger.log(err);

        warnUser();

    }

}

function
warnUser() {

    alert("An error has occurred while processing this page.\

        Our engineers have been alerted!");

    // do something

}

foo();