我使用BEncoded PHP Library解码来自Bittorrent跟踪器的bencoded响应。
Tracker的回应是:
d5:filesd20:¼€™rÄ2ÞÊþVA .]á^¦d8:completei285e10:downloadedi22911e10:incompletei9eeee
使用以下代码解码后:
require 'bencoded.php';
$be = new BEncoded;
//Response saved in scrape.txt
$data =file_get_contents('scrape.txt');
print_r($be->Decode($data));
输出是:
Array ( [files] => Array ( [¼€™rÄ2ÞÊþVA .]á^¦] => Array ( [complete] => 285 [downloaded] => 22911 [incomplete] => 9 [isDct] => 1 ) [isDct] => 1 ) [isDct] => 1 )
我的问题 我在上面的输出中的问题是如何解码输出中的那些神秘字母。
答案 0 :(得分:11)
user3690414发布的链接:http://wiki.vuze.com/w/Scrape几乎解释了不同的键代表什么。
解释原始的bencoded字符串:
d5:filesd20:¼€™rÄ2ÞÊþVA .]á^¦d8:completei285e10:downloadedi22911e10:incompletei9eeee
您需要了解bencoding的工作原理:https://wiki.theory.org/BitTorrentSpecification#Bencoding
最重要的是要知道,本作词典中的每个条目都是键,值 - 对。
其中键是字节字符串
和值以下类型之一:字节字符串,整数,列表或字典< /强>
考虑到这一点,原始字符串可以像这样分解:
d // The first d indicates the start of the Root dictionary
5:files // that has a Key with a 5 byte string name 'files',
d // the value of the 'files'-key is a second dictionary
20:¼€™rÄ2ÞÊþVA .]á^¦ // that has a Key 20 byte = 160 bit big endian SHA1 info-hash
d // the value of that key is a third dictionary
8:complete // that has a Key with a 8 byte string name 'complete',
i285e // the value of that key is a Integer=285
10:downloaded // that has a Key with a 10 byte string name 'downloaded',
i22911e // the value of that key is a Integer=22911
10:incomplete // that has a Key with a 10 byte string name 'incomplete',
i9e // the value of that key is a Integer=9
e // this e indicates the end of the third dictionary
e // this e indicates the end of the second dictionary
e // this e indicates the end of the Root dictionary
希望这有助于理解'bencoded.php'的输出。
修改。
如果你想制作160位大端的SHA1信息哈希[¼€™rÄ2ÞÊþVA。]á^ |]
更人性化,我建议您将其输出为40字节的十六进制编码字符串:
0xBC801B9D9972C432DECAFE56410F092E5DE15EA6
答案 1 :(得分:2)
如果您指的是files
数组的错位密钥,那么它的原始信息 - 请查看规范: