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Мультитрекер с ручным обновлением и поддержкой UDP и другие исправления в т.ч оптимизация заливки и download.php для больших торрент-файлов.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,212 @@ | ||
| <?php | ||
|
|
||
| /* | ||
| Programming info | ||
| All functions output a small array, which we'll call $return for now. | ||
| $return[0] is the data expected of the function | ||
| $return[1] is the offset over the whole bencoded data of the next | ||
| piece of data. | ||
| numberdecode returns [0] as the integer read, and [1]-1 points to the | ||
| symbol that was interprented as the end of the interger (either "e" or | ||
| ":"). | ||
| numberdecode is used for integer decodes both for i11e and 11:hello there | ||
| so it is tolerant of the ending symbol. | ||
| decodelist returns $return[0] as an integer indexed array like you would use in C | ||
| for all the entries. $return[1]-1 is the "e" that ends the list, so [1] is the next | ||
| useful byte. | ||
| decodeDict returns $return[0] as an array of text-indexed entries. For example, | ||
| $return[0]["announce"] = "http://www.whatever.com:6969/announce"; | ||
| $return[1]-1 again points to the "e" that ends the dictionary. | ||
| decodeEntry returns [0] as an integer in the case $offset points to | ||
| i12345e or a string if $offset points to 11:hello there style strings. | ||
| It also calls decodeDict or decodeList if it encounters a d or an l. | ||
| Known bugs: | ||
| - The program doesn't pay attention to the string it's working on. | ||
| A zero-sized or truncated data block will cause string offset errors | ||
| before they get rejected by the decoder. This is worked around by | ||
| suppressing errors. | ||
| */ | ||
|
|
||
| // Protect our namespace using a class | ||
| class BDecode | ||
| { | ||
|
|
||
| function numberdecode($wholefile, $start) | ||
| { | ||
| $ret[0] = 0; | ||
| $offset = $start; | ||
|
|
||
| // Funky handling of negative numbers and zero | ||
| $negative = false; | ||
| if ($wholefile[$offset] == '-') | ||
| { | ||
| $negative = true; | ||
| $offset++; | ||
| } | ||
| if ($wholefile[$offset] == '0') | ||
| { | ||
| $offset++; | ||
| if ($negative) | ||
| return array(false); | ||
| if ($wholefile[$offset] == ':' || $wholefile[$offset] == 'e') | ||
| { | ||
| $offset++; | ||
| $ret[0] = 0; | ||
| $ret[1] = $offset; | ||
| return $ret; | ||
| } | ||
| return array(false); | ||
| } | ||
| while (true) | ||
| { | ||
|
|
||
| if ($wholefile[$offset] >= '0' && $wholefile[$offset] <= '9') | ||
| { | ||
|
|
||
| $ret[0] *= 10; | ||
| $ret[0] += ord($wholefile[$offset]) - ord("0"); | ||
| $offset++; | ||
| } | ||
| // Tolerate : or e because this is a multiuse function | ||
| else if ($wholefile[$offset] == 'e' || $wholefile[$offset] == ':') | ||
| { | ||
| $ret[1] = $offset+1; | ||
| if ($negative) | ||
| { | ||
| if ($ret[0] == 0) | ||
| return array(false); | ||
| $ret[0] = - $ret[0]; | ||
| } | ||
| return $ret; | ||
| } | ||
| else | ||
| return array(false); | ||
| } | ||
|
|
||
| } | ||
|
|
||
| function decodeEntry($wholefile, $offset=0) | ||
| { | ||
| if ($wholefile[$offset] == 'd') | ||
| return $this->decodeDict($wholefile, $offset); | ||
| if ($wholefile[$offset] == 'l') | ||
| return $this->decodelist($wholefile, $offset); | ||
| if ($wholefile[$offset] == "i") | ||
| { | ||
| $offset++; | ||
| return $this->numberdecode($wholefile, $offset); | ||
| } | ||
| // String value: decode number, then grab substring | ||
| $info = $this->numberdecode($wholefile, $offset); | ||
| if ($info[0] === false) | ||
| return array(false); | ||
| $ret[0] = substr($wholefile, $info[1], $info[0]); | ||
| $ret[1] = $info[1]+strlen($ret[0]); | ||
| return $ret; | ||
| } | ||
|
|
||
| function decodeList($wholefile, $start) | ||
| { | ||
| $offset = $start+1; | ||
| $i = 0; | ||
| if ($wholefile[$start] != 'l') | ||
| return array(false); | ||
| $ret = array(); | ||
| while (true) | ||
| { | ||
| if ($wholefile[$offset] == 'e') | ||
| break; | ||
| $value = $this->decodeEntry($wholefile, $offset); | ||
| if ($value[0] === false) | ||
| return array(false); | ||
| $ret[$i] = $value[0]; | ||
| $offset = $value[1]; | ||
| $i ++; | ||
| } | ||
|
|
||
| // The empy list is an empty array. Seems fine. | ||
| $final[0] = $ret; | ||
| $final[1] = $offset+1; | ||
| return $final; | ||
|
|
||
| } | ||
|
|
||
| // Tries to construct an array | ||
| function decodeDict($wholefile, $start=0) | ||
| { | ||
| $offset = $start; | ||
| if ($wholefile[$offset] == 'l') | ||
| return $this->decodeList($wholefile, $start); | ||
| if ($wholefile[$offset] != 'd') | ||
| return false; | ||
| $ret = array(); | ||
| $offset++; | ||
| while (true) | ||
| { | ||
| if ($wholefile[$offset] == 'e') | ||
| { | ||
| $offset++; | ||
| break; | ||
| } | ||
| $left = $this->decodeEntry($wholefile, $offset); | ||
| if (!$left[0]) | ||
| return false; | ||
| $offset = $left[1]; | ||
| if ($wholefile[$offset] == 'd') | ||
| { | ||
| // Recurse | ||
| $value = $this->decodedict($wholefile, $offset); | ||
| if (!$value[0]) | ||
| return false; | ||
| $ret[addslashes($left[0])] = $value[0]; | ||
| $offset= $value[1]; | ||
| continue; | ||
| } | ||
| else if ($wholefile[$offset] == 'l') | ||
| { | ||
| $value = $this->decodeList($wholefile, $offset); | ||
| if (!$value[0] && is_bool($value[0])) | ||
| return false; | ||
| $ret[addslashes($left[0])] = $value[0]; | ||
| $offset = $value[1]; | ||
| } | ||
| else | ||
| { | ||
| $value = $this->decodeEntry($wholefile, $offset); | ||
| if ($value[0] === false) | ||
| return false; | ||
| $ret[addslashes($left[0])] = $value[0]; | ||
| $offset = $value[1]; | ||
| } | ||
| } | ||
| if (empty($ret)) | ||
| $final[0] = true; | ||
| else | ||
| $final[0] = $ret; | ||
| $final[1] = $offset; | ||
| return $final; | ||
|
|
||
|
|
||
| } | ||
|
|
||
| } // End of class declaration. | ||
|
|
||
| // Use this function. eg: BDecode("d8:announce44:http://www. ... e"); | ||
| function BDecode($wholefile) | ||
| { | ||
| $decoder = new BDecode; | ||
| $return = $decoder->decodeEntry($wholefile); | ||
| return $return[0]; | ||
| } | ||
|
|
||
| ?> |
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