gaspersic/developer-roadmap
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update site meta and title update for post

Browse Source
This commit is contained in:
Kamran Ahmed
2020-01-18 00:56:49 +04:00
parent 835476ed31
commit 4fbefd5ae9
3 changed files with 13 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
static/sitemap.xml
View File

@ -186,6 +186,12 @@
<lastmod>2020-01-02T05:49:17.051Z</lastmod>
<priority>1.0</priority>
</url>
<url>
<loc>https://roadmap.sh/guides/torrent-client</loc>
<changefreq>monthly</changefreq>
<lastmod>2020-01-17T15:48:21.191Z</lastmod>
<priority>1.0</priority>
</url>
<url>
<loc>https://roadmap.sh/guides/levels-of-seniority</loc>
<changefreq>monthly</changefreq>

4
storage/guides.json
View File

@ -1,7 +1,7 @@
[
{
"title": "Building a BitTorrent client from the ground up in Go",
"description": "What is the complete path between visiting thepiratebay and sublimating an mp3 file from thin air?",
"title": "Building a BitTorrent Client",
"description": "Learn everything you need to know about BitTorrent by writing a client in Go",
"url": "/guides/torrent-client",
"fileName": "torrent-client",
"featured": true,

10
storage/guides/torrent-client.md
View File

@ -1,4 +1,4 @@
BitTorrent is a protocol for downloading and distributing files across the Internet. In contrast with the traditional client/server relationship, in which downloaders connect to a central server (for example: watching a movie on Netflix, or loading the web page you're reading now), participants in the BitTorrent network, called **peers**, download pieces of files from *each other*—this is what makes it a **peer-to-peer** protocol. We'll investigate how this works, and build our own client that can find peers and exchange data between them.
BitTorrent is a protocol for downloading and distributing files across the Internet. In contrast with the traditional client/server relationship, in which downloaders connect to a central server (for example: watching a movie on Netflix, or loading the web page you're reading now), participants in the BitTorrent network, called **peers**, download pieces of files from *each other*—this is what makes it a **peer-to-peer** protocol. In this article we will investigate how this works, and build our own client that can find peers and exchange data between them.
![diagram showing the difference between client/server (all clients connecting to one server) and peer-to-peer (peers connecting to each other) relationships](/static/guides/torrent-client/client-server-p2p.png)
@ -16,7 +16,7 @@ Of course, these central servers are liable to get raided by the feds if they fa
## Parsing a .torrent file
A .torrent file describes the contents of a torrentable file and information for connecting to a tracker. It's all we need in order to kickstart the process of downloading a torrent. Debian's .torrent file looks like this:
```
```markdown
d8:announce41:http://bttracker.debian.org:6969/announce7:comment35:"Debian CD from cdimage.debian.org"13:creation datei1573903810e9:httpseedsl145:https://cdimage.debian.org/cdimage/release/10.2.0//srv/cdbuilder.debian.org/dst/deb-cd/weekly-builds/amd64/iso-cd/debian-10.2.0-amd64-netinst.iso145:https://cdimage.debian.org/cdimage/archive/10.2.0//srv/cdbuilder.debian.org/dst/deb-cd/weekly-builds/amd64/iso-cd/debian-10.2.0-amd64-netinst.isoe4:infod6:lengthi351272960e4:name31:debian-10.2.0-amd64-netinst.iso12:piece lengthi262144e6:pieces26800:<3A><1F><0F><><EFBFBD>PS<50>^<5E><> (binary blob of the hashes of each piece)ee
```
@ -27,7 +27,7 @@ Bencode can encode roughly the same types of structures as JSON—strings, integ
In a prettier format, our .torrent file looks like this:
```
```markdown
d
8:announce
41:http://bttracker.debian.org:6969/announce
@ -139,7 +139,7 @@ The important ones:
## Parsing the tracker response
We get back a bencoded response:
```
```markdown
d
8:interval
i900e
@ -215,7 +215,7 @@ My father told me that the secret to a good handshake is a firm grip and eye con
Put together, a handshake string might look like this:
```
```markdown
\x13BitTorrent protocol\x00\x00\x00\x00\x00\x00\x00\x00\x86\xd4\xc8\x00\x24\xa4\x69\xbe\x4c\x50\xbc\x5a\x10\x2c\xf7\x17\x80\x31\x00\x74-TR2940-k8hj0wgej6ch
```