How to create torrent file from magnet link using java?

up vote
0
down vote

favorite

So I wanted to work on a new Java project that converts magnet URIs into .torrent files, however I can't find a way to do that, basically I broke a magnet URI into pieces :

The used URI :

magnet:?xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36&dn=Leaves+of+Grass+by+Walt+Whitman.epub&tr=udp%3A%2F%2Ftracker.example4.com%3A80&tr=udp%3A%2F%2Ftracker.example5.com%3A80&tr=udp%3A%2F%2Ftracker.example3.com%3A6969&tr=udp%3A%2F%2Ftracker.example2.com%3A80&tr=udp%3A%2F%2Ftracker.example1.com%3A1337

The breaking down :

magnet:?

xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36

dn=Leaves+of+Grass+by+Walt+Whitman.epub

tr=udp%3A%2F%2Ftracker.example4.com%3A80

tr=udp%3A%2F%2Ftracker.example5.com%3A80

tr=udp%3A%2F%2Ftracker.example3.com%3A6969

tr=udp%3A%2F%2Ftracker.example2.com%3A80

tr=udp%3A%2F%2Ftracker.example1.com%3A1337

from what I gathered using this link, The torrent file contains the files , lengths and paths of the required files but I can't seem to get that from the magnet URI.

Thanks in advance.

edited Feb 19 at 20:04

the_storyteller

1,1811118

asked Feb 19 at 19:57

Tarek Mohamed

1617

@MarsAtomic SHA-1 "encrypted"?
– Kayaman
Feb 19 at 20:13

1

@MarsAtomic no, not really. Are you saying he should reverse a SHA-1 hash? And are you saying that without any hint of sarcasm?
– Kayaman
Feb 19 at 20:18

I think so, I have found that the hashsums are SHA-1 encoded
– Tarek Mohamed
Feb 19 at 20:22

1

Well, now you'll find out that hashes are one-way, meaning you can't "decode" them.
– Kayaman
Feb 19 at 20:25

add a comment |

up vote
0
down vote

favorite

So I wanted to work on a new Java project that converts magnet URIs into .torrent files, however I can't find a way to do that, basically I broke a magnet URI into pieces :

The used URI :

magnet:?xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36&dn=Leaves+of+Grass+by+Walt+Whitman.epub&tr=udp%3A%2F%2Ftracker.example4.com%3A80&tr=udp%3A%2F%2Ftracker.example5.com%3A80&tr=udp%3A%2F%2Ftracker.example3.com%3A6969&tr=udp%3A%2F%2Ftracker.example2.com%3A80&tr=udp%3A%2F%2Ftracker.example1.com%3A1337

The breaking down :

magnet:?

xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36

dn=Leaves+of+Grass+by+Walt+Whitman.epub

tr=udp%3A%2F%2Ftracker.example4.com%3A80

tr=udp%3A%2F%2Ftracker.example5.com%3A80

tr=udp%3A%2F%2Ftracker.example3.com%3A6969

tr=udp%3A%2F%2Ftracker.example2.com%3A80

tr=udp%3A%2F%2Ftracker.example1.com%3A1337

from what I gathered using this link, The torrent file contains the files , lengths and paths of the required files but I can't seem to get that from the magnet URI.

Thanks in advance.

edited Feb 19 at 20:04

the_storyteller

1,1811118

asked Feb 19 at 19:57

Tarek Mohamed

1617

@MarsAtomic SHA-1 "encrypted"?
– Kayaman
Feb 19 at 20:13

1

@MarsAtomic no, not really. Are you saying he should reverse a SHA-1 hash? And are you saying that without any hint of sarcasm?
– Kayaman
Feb 19 at 20:18

I think so, I have found that the hashsums are SHA-1 encoded
– Tarek Mohamed
Feb 19 at 20:22

1

Well, now you'll find out that hashes are one-way, meaning you can't "decode" them.
– Kayaman
Feb 19 at 20:25

add a comment |

up vote
0
down vote

favorite

So I wanted to work on a new Java project that converts magnet URIs into .torrent files, however I can't find a way to do that, basically I broke a magnet URI into pieces :

The used URI :

magnet:?xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36&dn=Leaves+of+Grass+by+Walt+Whitman.epub&tr=udp%3A%2F%2Ftracker.example4.com%3A80&tr=udp%3A%2F%2Ftracker.example5.com%3A80&tr=udp%3A%2F%2Ftracker.example3.com%3A6969&tr=udp%3A%2F%2Ftracker.example2.com%3A80&tr=udp%3A%2F%2Ftracker.example1.com%3A1337

The breaking down :

magnet:?

xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36

dn=Leaves+of+Grass+by+Walt+Whitman.epub

tr=udp%3A%2F%2Ftracker.example4.com%3A80

tr=udp%3A%2F%2Ftracker.example5.com%3A80

tr=udp%3A%2F%2Ftracker.example3.com%3A6969

tr=udp%3A%2F%2Ftracker.example2.com%3A80

tr=udp%3A%2F%2Ftracker.example1.com%3A1337

from what I gathered using this link, The torrent file contains the files , lengths and paths of the required files but I can't seem to get that from the magnet URI.

Thanks in advance.

edited Feb 19 at 20:04

the_storyteller

1,1811118

asked Feb 19 at 19:57

Tarek Mohamed

1617

So I wanted to work on a new Java project that converts magnet URIs into .torrent files, however I can't find a way to do that, basically I broke a magnet URI into pieces :

The used URI :

magnet:?xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36&dn=Leaves+of+Grass+by+Walt+Whitman.epub&tr=udp%3A%2F%2Ftracker.example4.com%3A80&tr=udp%3A%2F%2Ftracker.example5.com%3A80&tr=udp%3A%2F%2Ftracker.example3.com%3A6969&tr=udp%3A%2F%2Ftracker.example2.com%3A80&tr=udp%3A%2F%2Ftracker.example1.com%3A1337

The breaking down :

magnet:?

xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36

dn=Leaves+of+Grass+by+Walt+Whitman.epub

tr=udp%3A%2F%2Ftracker.example4.com%3A80

tr=udp%3A%2F%2Ftracker.example5.com%3A80

tr=udp%3A%2F%2Ftracker.example3.com%3A6969

tr=udp%3A%2F%2Ftracker.example2.com%3A80

tr=udp%3A%2F%2Ftracker.example1.com%3A1337

from what I gathered using this link, The torrent file contains the files , lengths and paths of the required files but I can't seem to get that from the magnet URI.

Thanks in advance.

java bittorrent torrent magnet-uri

edited Feb 19 at 20:04

the_storyteller

1,1811118

asked Feb 19 at 19:57

Tarek Mohamed

1617

edited Feb 19 at 20:04

the_storyteller

1,1811118

asked Feb 19 at 19:57

Tarek Mohamed

1617

edited Feb 19 at 20:04

the_storyteller

1,1811118

edited Feb 19 at 20:04

the_storyteller

1,1811118

edited Feb 19 at 20:04

the_storyteller

1,1811118

asked Feb 19 at 19:57

Tarek Mohamed

1617

asked Feb 19 at 19:57

Tarek Mohamed

1617

asked Feb 19 at 19:57

Tarek Mohamed

1617

@MarsAtomic SHA-1 "encrypted"?
– Kayaman
Feb 19 at 20:13

1

@MarsAtomic no, not really. Are you saying he should reverse a SHA-1 hash? And are you saying that without any hint of sarcasm?
– Kayaman
Feb 19 at 20:18

I think so, I have found that the hashsums are SHA-1 encoded
– Tarek Mohamed
Feb 19 at 20:22

1

Well, now you'll find out that hashes are one-way, meaning you can't "decode" them.
– Kayaman
Feb 19 at 20:25

add a comment |

@MarsAtomic SHA-1 "encrypted"?
– Kayaman
Feb 19 at 20:13

1

@MarsAtomic no, not really. Are you saying he should reverse a SHA-1 hash? And are you saying that without any hint of sarcasm?
– Kayaman
Feb 19 at 20:18

I think so, I have found that the hashsums are SHA-1 encoded
– Tarek Mohamed
Feb 19 at 20:22

1

Well, now you'll find out that hashes are one-way, meaning you can't "decode" them.
– Kayaman
Feb 19 at 20:25

@MarsAtomic SHA-1 "encrypted"?
– Kayaman
Feb 19 at 20:13

@MarsAtomic no, not really. Are you saying he should reverse a SHA-1 hash? And are you saying that without any hint of sarcasm?
– Kayaman
Feb 19 at 20:18

I think so, I have found that the hashsums are SHA-1 encoded
– Tarek Mohamed
Feb 19 at 20:22

Well, now you'll find out that hashes are one-way, meaning you can't "decode" them.
– Kayaman
Feb 19 at 20:25

add a comment |

2 Answers
2

active

oldest

votes

up vote
1
down vote

It's impossible to recreate the .torrent file from the magnet link alone.

The way torrent clients gets the .torrent file from a magnet link is:

Get a peer list from the tracker(s) and/or from the DHT.

Connect to peers and download the .torrent metadata using
BEP9 - Extension for Peers to Send Metadata Files.

answered Feb 19 at 20:30

Encombe

1,4631919

Thank you for your comment, okay so,let me rephrase my question, using Java , how can I connect to peers and get the meta data if I have the magnet link ?
– Tarek Mohamed
Feb 20 at 9:34

Implementing the above means implementing a almost complete bittorrent client - i.e. it's most probably easier to find a way to use a existing, already finished client.
– Encombe
Feb 20 at 11:39

I have searched for already made torrent clients ( like this one ) , but it is too complicated for me to get the meta data grabbing part.
– Tarek Mohamed
Feb 20 at 12:52

It is complicated and there is no way around that. As a alternative, you maybe can use a online service: btcache.me btso.pw itorrents.org magnet2torrent.me torrage.info thetorrent.org magnet2torrent.com
– Encombe
Feb 20 at 15:22

add a comment |

up vote
0
down vote

not really clean but..

Runtime.getRuntime().exec(new String{"cmd", "/c","start firefox " + mag});

// needs firefox and a default torrent handler.
// mag = magnet string

answered Nov 10 at 21:26

Mikhail Zerafa

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
1
down vote

It's impossible to recreate the .torrent file from the magnet link alone.

The way torrent clients gets the .torrent file from a magnet link is:

Get a peer list from the tracker(s) and/or from the DHT.

Connect to peers and download the .torrent metadata using
BEP9 - Extension for Peers to Send Metadata Files.

answered Feb 19 at 20:30

Encombe

1,4631919

Thank you for your comment, okay so,let me rephrase my question, using Java , how can I connect to peers and get the meta data if I have the magnet link ?
– Tarek Mohamed
Feb 20 at 9:34

Implementing the above means implementing a almost complete bittorrent client - i.e. it's most probably easier to find a way to use a existing, already finished client.
– Encombe
Feb 20 at 11:39

I have searched for already made torrent clients ( like this one ) , but it is too complicated for me to get the meta data grabbing part.
– Tarek Mohamed
Feb 20 at 12:52

It is complicated and there is no way around that. As a alternative, you maybe can use a online service: btcache.me btso.pw itorrents.org magnet2torrent.me torrage.info thetorrent.org magnet2torrent.com
– Encombe
Feb 20 at 15:22

add a comment |

up vote
1
down vote

It's impossible to recreate the .torrent file from the magnet link alone.

The way torrent clients gets the .torrent file from a magnet link is:

Get a peer list from the tracker(s) and/or from the DHT.

Connect to peers and download the .torrent metadata using
BEP9 - Extension for Peers to Send Metadata Files.

answered Feb 19 at 20:30

Encombe

1,4631919

Thank you for your comment, okay so,let me rephrase my question, using Java , how can I connect to peers and get the meta data if I have the magnet link ?
– Tarek Mohamed
Feb 20 at 9:34

Implementing the above means implementing a almost complete bittorrent client - i.e. it's most probably easier to find a way to use a existing, already finished client.
– Encombe
Feb 20 at 11:39

I have searched for already made torrent clients ( like this one ) , but it is too complicated for me to get the meta data grabbing part.
– Tarek Mohamed
Feb 20 at 12:52

It is complicated and there is no way around that. As a alternative, you maybe can use a online service: btcache.me btso.pw itorrents.org magnet2torrent.me torrage.info thetorrent.org magnet2torrent.com
– Encombe
Feb 20 at 15:22

add a comment |

up vote
1
down vote

It's impossible to recreate the .torrent file from the magnet link alone.

The way torrent clients gets the .torrent file from a magnet link is:

Get a peer list from the tracker(s) and/or from the DHT.

Connect to peers and download the .torrent metadata using
BEP9 - Extension for Peers to Send Metadata Files.

answered Feb 19 at 20:30

Encombe

1,4631919

It's impossible to recreate the .torrent file from the magnet link alone.

The way torrent clients gets the .torrent file from a magnet link is:

Get a peer list from the tracker(s) and/or from the DHT.

Connect to peers and download the .torrent metadata using
BEP9 - Extension for Peers to Send Metadata Files.

answered Feb 19 at 20:30

Encombe

1,4631919

answered Feb 19 at 20:30

Encombe

1,4631919

answered Feb 19 at 20:30

Encombe

1,4631919

answered Feb 19 at 20:30

Encombe

1,4631919

Thank you for your comment, okay so,let me rephrase my question, using Java , how can I connect to peers and get the meta data if I have the magnet link ?
– Tarek Mohamed
Feb 20 at 9:34

Implementing the above means implementing a almost complete bittorrent client - i.e. it's most probably easier to find a way to use a existing, already finished client.
– Encombe
Feb 20 at 11:39

I have searched for already made torrent clients ( like this one ) , but it is too complicated for me to get the meta data grabbing part.
– Tarek Mohamed
Feb 20 at 12:52

It is complicated and there is no way around that. As a alternative, you maybe can use a online service: btcache.me btso.pw itorrents.org magnet2torrent.me torrage.info thetorrent.org magnet2torrent.com
– Encombe
Feb 20 at 15:22

add a comment |

Thank you for your comment, okay so,let me rephrase my question, using Java , how can I connect to peers and get the meta data if I have the magnet link ?
– Tarek Mohamed
Feb 20 at 9:34

Implementing the above means implementing a almost complete bittorrent client - i.e. it's most probably easier to find a way to use a existing, already finished client.
– Encombe
Feb 20 at 11:39

I have searched for already made torrent clients ( like this one ) , but it is too complicated for me to get the meta data grabbing part.
– Tarek Mohamed
Feb 20 at 12:52

It is complicated and there is no way around that. As a alternative, you maybe can use a online service: btcache.me btso.pw itorrents.org magnet2torrent.me torrage.info thetorrent.org magnet2torrent.com
– Encombe
Feb 20 at 15:22

Thank you for your comment, okay so,let me rephrase my question, using Java , how can I connect to peers and get the meta data if I have the magnet link ?
– Tarek Mohamed
Feb 20 at 9:34

Implementing the above means implementing a almost complete bittorrent client - i.e. it's most probably easier to find a way to use a existing, already finished client.
– Encombe
Feb 20 at 11:39

I have searched for already made torrent clients ( like this one ) , but it is too complicated for me to get the meta data grabbing part.
– Tarek Mohamed
Feb 20 at 12:52

It is complicated and there is no way around that. As a alternative, you maybe can use a online service: btcache.me btso.pw itorrents.org magnet2torrent.me torrage.info thetorrent.org magnet2torrent.com
– Encombe
Feb 20 at 15:22

add a comment |

up vote
0
down vote

not really clean but..

Runtime.getRuntime().exec(new String{"cmd", "/c","start firefox " + mag});

// needs firefox and a default torrent handler.
// mag = magnet string

answered Nov 10 at 21:26

Mikhail Zerafa

add a comment |

up vote
0
down vote

not really clean but..

Runtime.getRuntime().exec(new String{"cmd", "/c","start firefox " + mag});

// needs firefox and a default torrent handler.
// mag = magnet string

answered Nov 10 at 21:26

Mikhail Zerafa

add a comment |

up vote
0
down vote

not really clean but..

Runtime.getRuntime().exec(new String{"cmd", "/c","start firefox " + mag});

// needs firefox and a default torrent handler.
// mag = magnet string

answered Nov 10 at 21:26

Mikhail Zerafa

not really clean but..

Runtime.getRuntime().exec(new String{"cmd", "/c","start firefox " + mag});

// needs firefox and a default torrent handler.
// mag = magnet string

answered Nov 10 at 21:26

Mikhail Zerafa

answered Nov 10 at 21:26

Mikhail Zerafa

answered Nov 10 at 21:26

Mikhail Zerafa

answered Nov 10 at 21:26

Mikhail Zerafa

add a comment |

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