Question

http://code.google.com/apis/analytics/docs/履带/gaTrackingCustomVariables.html#varTypes”rel=“nofollow” 页: 1

The total combined length of any custom variable name and value may not exceed 64 bytes. Keep in mind that this is not equivalent to 64 characters. Because names and values are URI encoded when stored, some characters use more than one byte. For example, = is stored as %3D rather than = and uses 3 bytes rather than 1. To get a list of URI encoded values, search the web for URL encoding reference.

I have two questions about that:

Should an encoded equal sign (=) be included in those 64 bytes?

I ve tried to make a function that makes sure the custom name and value is not too long. Can it be improved? (Of course it can.)

function truncateCustomVarAndSet(index, name, value, scope) {
    var keyValuePair, 
        encodedPair,
        lengthOK = false;
    while (!lengthOK && value.length > 0) {
        keyValuePair = name +  =  + value;
        encodedPair = encodeURIComponent(keyValuePair);
        lengthOK = encodedPair.length <= 64;
        if (!lengthOK) {
            value = value.substring(0, value.length - 1);
        }
    } 
    _gaq.push([ _setCustomVar , index, name, value, scope]);        
}

<><>Edit>: 现在使用的是encodeURIComponent,而不是encodeURI。

<Edit2:@yahelc change gaq to _qac, 因此,我从论点清单中删除了“gaq”一词,因为现在更不需要。

Answer 1

我测试了将64个特性的习俗变数加在一起,它像64个是用关键和价值而不是任何关联特性的字体编码的。

您应使用encodeURIComponent ,因为/code>并不包含&, <+>>>>>/code>>/code>>,以及。

Also, don t forget the underscore in front of _gaq. _gaq needs to be a global variable, so, no need to pass it through as a parameter.

It looks like your general approach works, and avoids the issue of mistakenly cropping the string in the middle of an encoded character (as my previous approach mistakenly did.)

这里是你法典的缩略语(大约220个果园):

function truncateCustomVarAndSet(index, name, value, scope) {
    while (value.length && encodeURIComponent(name + value).length > 64) {
            value = value.substring(0, value.length-1);
    } 
    _gaq.push([ _setCustomVar , index, name, value, scope]);        
}

测试:

truncateCustomVarAndSet(3,"34567890345678903=1=1=456789034567895678904567890","211222$#!#11221122112122112eeeqeqqeqefo1op2k1po12kop21pok2p1o",1)
_gaq.push(["_trackPageview"]);

记录如下:

Custom Var 3
label: 34567890345678903=1=1=456789034567895678904567890
value: 211222$
scope: 1

Answer 2

从描述中看,“=”似乎只是作为设定的一部分计算,只有在关键或价值相同的情况下。
我把你的职能缩减了一步。

function truncateCustomVarAndSet(index, name, value, scope) {
    var n = encodeURIComponent(name)
        ,v = encodeURIComponent(value)
    for(;(n + v).length > 64; v=encodeURIComponent(value=value.substr(1-value.length)));
    _gaq.push([ _setCustomVar , index, name, value, scope]);        
}

友情链接