[英]Encoding info_hash for request torrent tracker
I would like to interact with a torrent tracker in Node.js. 我想与Node.js中的torrent跟踪器进行交互。 So I calculate the info_hash and I get the good one :
7cd350e5a70f0a61593e636543f9fc670ffa8a4d
因此,我计算出了info_hash并得到了一个好的结果:
7cd350e5a70f0a61593e636543f9fc670ffa8a4d
But to be send to the tracker it have to be urlencoded. 但是要发送到跟踪器,必须对其进行urlencoded。 The problem is I don't know how to do it to get the right encoded value which is
%7c%d3P%e5%a7%0f%0aaY%3eceC%f9%fcg%0f%fa%8aM
问题是我不知道该怎么做才能获得正确的编码值,即
%7c%d3P%e5%a7%0f%0aaY%3eceC%f9%fcg%0f%fa%8aM
I doesn't know how to get this value, because it doesn't follow the %nn
format 我不知道如何获取此值,因为它不遵循
%nn
格式
I tried with encodeURIComponent and querystring, but I didn't get the right string. 我尝试使用encodeURIComponent和querystring,但是没有得到正确的字符串。
Here's one solution that matches the expected output (including capitalization): 这是一个与预期输出(包括大写字母)匹配的解决方案:
var h = '7cd350e5a70f0a61593e636543f9fc670ffa8a4d';
h = h.replace(/.{2}/g, function(m) {
var v = parseInt(m, 16);
if (v <= 127) {
m = encodeURIComponent(String.fromCharCode(v));
if (m[0] === '%')
m = m.toLowerCase();
} else
m = '%' + m;
return m;
});
console.log(h);
// outputs: %7c%d3P%e5%a7%0f%0aaY%3eceC%f9%fcg%0f%fa%8aM
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