Firefox上读取服务端二进制数据

本文介绍了一个使用Firefox和Firebug通过JavaScript生成JSI logo的方法。具体步骤包括:打开Firefox并访问指定网址,利用Firebug输入特定JavaScript代码,执行后将显示一个以Data URL形式的图片,该图片为JSI的logo。

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[list]
[*]打开你的[b]firefox[/b]


输入:
[url]http://www.xidea.org[/url]


[*]打开firebug脚本输入窗口。


贴上代码:
[quote]var xhr = new XMLHttpRequest();
var replaceMap = {};
var list = "20ac 81 201a 192 201e 2026 2020 2021 2c6 2030 160 2039 152 8d 17d 8f 90 2018 2019 201c 201d 2022 2013 2014 2dc 2122 161 203a 153 9d 17e 178".split(" ")
var i=32;
while(i--){
replaceMap[String.fromCharCode(parseInt(list[i],16))] = String.fromCharCode(0x80+i)
}
function replacer(c){
return replaceMap[c];
}

xhr.open("get","http://www.xidea.org/project/jsi/images/logo.gif",false);
xhr.overrideMimeType("text/html;charset=ISO-8859-1");
xhr.send('');

prompt('',"data:image/png;base64,"+btoa(String(xhr.responseText).replace(/[\u0100-\uffff]/g,replacer)));
[/quote]
按下:control + Entry 执行代码。


[*]复制弹出的生成代码:

不出意外,应该是这样的:
[quote]data:image/png;base64,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
[/quote]


[*]浏览器中输出生成的代码:

你就可以看到JSI的logo了^_^
[/list]
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