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slsk-batchdl/README.md
FoxxMD 5357911054 Implement spotify token and refresh flow from configuration 
* makes headless usage of sldl easier #42
* fallback to outputting login flow URL if opening a browser fails (in headless environment)
* output token and refresh token on login complete
* parse token and refresh token from config and attempt to use before invoking login flow
2024-08-27 14:50:25 -04:00

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# slsk-batchdl
A batch downloader for Soulseek built with Soulseek.NET. Accepts CSV files and Spotify or YouTube urls.
## Index
- [Options](#options)
- [Input types](#input-types)
- [CSV file](#csv-file)
- [YouTube](#youtube)
- [Spotify](#spotify)
- [Bandcamp](#bandcamp)
- [Search string](#search-string)
- [Download modes](#download-modes)
- [Normal](#normal)
- [Album](#album)
- [Aggregate](#aggregate)
- [Album Aggregate](#album-aggregate)
- [Searching](#searching)
- [File conditions](#file-conditions)
- [Name format](#name-format)
- [Skip existing](#skip-existing)
- [Configuration](#configuration)
- [Examples](#examples-1)
- [Notes](#notes)
## Options
```
Usage: sldl <input> [OPTIONS]
Required Arguments
<input> A url, search string, or path to a local CSV file.
Run --help "input" to view the accepted inputs.
Can also be passed with -i, --input <input>
--user <username> Soulseek username
--pass <password> Soulseek password
```
```
General Options
-p, --path <path> Download directory
-f, --folder <name> Subfolder name. Set to '.' to output directly to --path
--input-type <type> Force set input type, [csv|youtube|spotify|bandcamp|string]
--name-format <format> Name format for downloaded tracks. See --help name-format
-n, --number <maxtracks> Download the first n tracks of a playlist
-o, --offset <offset> Skip a specified number of tracks
-r, --reverse Download tracks in reverse order
-c, --config <path> Set config file location. Set to 'none' to ignore config
--profile <name> Configuration profile to use. See --help "config".
--concurrent-downloads <num> Max concurrent downloads (default: 2)
--m3u <option> Create an m3u8 playlist file in the output directory
'none' (default for single inputs): Do not create
'index' (default): Write a line indexing all downloaded
files, required for skip-not-found or skip-existing=m3u
'all': Write the index and a list of paths and fails
-s, --skip-existing Skip if a track matching file conditions is found in the
output folder or your music library (if provided)
--skip-mode <mode> [name|tag|m3u|name-cond|tag-cond|m3u-cond]
See --help "skip-existing".
--music-dir <path> Specify to also skip downloading tracks found in a music
library. Use with --skip-existing
--skip-not-found Skip searching for tracks that weren't found on Soulseek
during the last run. Fails are read from the m3u file.
--skip-existing-pref-cond Use preferred instead of necessary conds for skip-existing
--display-mode <option> Changes how searches and downloads are displayed:
'single' (default): Show transfer state and percentage
'double': Transfer state and a large progress bar
'simple': No download bars or changing percentages
--print <option> Print tracks or search results instead of downloading:
'tracks': Print all tracks to be downloaded
'tracks-full': Print extended information about all tracks
'results': Print search results satisfying file conditions
'results-full': Print search results including full paths
--debug Print extra debug info
--listen-port <port> Port for incoming connections (default: 49998)
--on-complete <command> Run a specified command whenever a file is downloaded.
Available placeholders: {path} (local save path), {title},
{artist},{album},{uri},{length},{failure-reason},{state}.
Prepend a state number to only download in specific cases:
1:, 2:, 3:, 4: for the Downloaded, Failed, Exists, and
NotFoundLastTime states respectively.
E.g: '1:<cmd>' will only run the command if the file is
downloaded successfully.
```
```
Searching
--fast-search Begin downloading as soon as a file satisfying the preferred
conditions is found. Only for normal download mode.
--remove-ft Remove 'feat.' and everything after before searching
--no-remove-special-chars Do not remove special characters before searching
--remove-brackets Remove square brackets and their contents before searching
--regex <regex> Remove a regexp from all track titles and artist names.
Optionally specify a replacement regex after a semicolon.
Add 'T:', 'A:' or 'L:' at the start to only apply this to
the track title, artist, or album respectively.
--artist-maybe-wrong Performs an additional search without the artist name.
Useful for sources like SoundCloud where the "artist"
could just be an uploader. Note that when downloading a
YouTube playlist via url, this option is set automatically
on a per-track basis, so it is best kept off in that case.
-d, --desperate Tries harder to find the desired track by searching for the
artist/album/title only, then filtering. (slower search)
--fails-to-downrank <num> Number of fails to downrank a user's uploads (default: 1)
--fails-to-ignore <num> Number of fails to ban/ignore a user's uploads (default: 2)
--yt-dlp Use yt-dlp to download tracks that weren't found on
Soulseek. yt-dlp must be available from the command line.
--yt-dlp-argument <str> The command line arguments when running yt-dlp. Default:
"{id}" -f bestaudio/best -cix -o "{savepath}.%(ext)s"
Available vars are: {id}, {savedir}, {savepath} (w/o ext).
Note that with -x, yt-dlp will download webms in case
ffmpeg is unavailable.
--search-timeout <ms> Max search time in ms (default: 6000)
--max-stale-time <ms> Max download time without progress in ms (default: 50000)
--searches-per-time <num> Max searches per time interval. Higher values may cause
30-minute bans, see --help "search". (default: 34)
--searches-renew-time <sec> Controls how often available searches are replenished.
See --help "search". (default: 220)
```
```
Spotify
--spotify-id <id> spotify client ID
--spotify-secret <secret> spotify client secret
--spotify-token <token> spotify access token
--spotify-refresh <token> spotify refresh token
--remove-from-source Remove downloaded tracks from source playlist
```
```
YouTube
--youtube-key <key> Youtube data API key
--get-deleted Attempt to retrieve titles of deleted videos from wayback
machine. Requires yt-dlp.
--deleted-only Only retrieve & download deleted music.
```
```
CSV Files
--artist-col Artist column name
--title-col Track title column name
--album-col Album column name
--length-col Track length column name
--album-track-count-col Album track count column name (sets --album-track-count)
--yt-desc-col Youtube description column (improves --yt-parse)
--yt-id-col Youtube video id column (improves --yt-parse)
--time-format <format> Time format in Length column of the csv file (e.g h:m:s.ms
for durations like 1:04:35.123). Default: s
--yt-parse Enable if the CSV contains YouTube video titles and channel
names; attempt to parse them into title and artist names.
--remove-from-source Remove downloaded tracks from source CSV file
```
```
File Conditions
--format <formats> Accepted file format(s), comma-separated, without periods
--length-tol <sec> Length tolerance in seconds
--min-bitrate <rate> Minimum file bitrate
--max-bitrate <rate> Maximum file bitrate
--min-samplerate <rate> Minimum file sample rate
--max-samplerate <rate> Maximum file sample rate
--min-bitdepth <depth> Minimum bit depth
--max-bitdepth <depth> Maximum bit depth
--banned-users <list> Comma-separated list of users to ignore
--pref-format <formats> Preferred file format(s), comma-separated (default: mp3)
--pref-length-tol <sec> Preferred length tolerance in seconds (default: 3)
--pref-min-bitrate <rate> Preferred minimum bitrate (default: 200)
--pref-max-bitrate <rate> Preferred maximum bitrate (default: 2500)
--pref-min-samplerate <rate> Preferred minimum sample rate
--pref-max-samplerate <rate> Preferred maximum sample rate (default: 48000)
--pref-min-bitdepth <depth> Preferred minimum bit depth
--pref-max-bitdepth <depth> Preferred maximum bit depth
--pref-banned-users <list> Comma-separated list of users to downrank
--strict-conditions Skip files with missing properties instead of accepting by
default; if --min-bitrate is set, ignores any files with
unknown bitrate.
```
```
Album Download
-a, --album Album download mode
-t, --interactive Allows to select the wanted folder and images
--album-track-count <num> Specify the exact number of tracks in the album. Add a + or
- for inequalities, e.g '5+' for five or more tracks.
--album-ignore-fails Do not skip to the next source and do not delete all
successfully downloaded files if one of the files in the
folder fails to download
--album-art <option> Retrieve additional images after downloading the album:
'default': No additional images
'largest': Download from the folder with the largest image
'most': Download from the folder containing the most images
'most-largest': Do most, then largest
--album-art-only Only download album art for the provided album
--no-browse-folder Do not automatically browse user shares to get all files in
in the folder
```
```
Aggregate Download
-g, --aggregate Aggregate download mode: Find and download all distinct
songs associated with the provided artist, album, or title.
--min-users-aggregate <num> Minimum number of users sharing a track or album for it to
be downloaded in aggregate mode. (Default: 2)
--relax-filtering Slightly relax file filtering in aggregate mode to include
more results
```
```
Help
-h, --help [option] [all|input|download-modes|search|name-format|
file-conditions|skip-existing|config]
```
```
Notes
Acronyms of two- and --three-word-flags are also accepted, e.g. --twf. If the option
contains the word 'max' then the m should be uppercase. 'bitrate', 'sameplerate' and
'bitdepth' should be all treated as two separate words, e.g --Mbr for --max-bitrate.
Flags can be explicitly disabled by setting them to false, e.g '--interactive false'
```
## Input types
The input type is usually determined automatically. To force a specific input type, set
--input-type [spotify|youtube|csv|string|bandcamp]. The following input types are available:
### CSV file
Path to a local CSV file: Use a csv file containing track info of the songs to download.
The names of the columns should be Artist, Title, Album, Length, although alternative names
are usually detected as well. Only the title or album column is required, but extra info may
improve search results. Every row that does not have a title column text will be treated as an
album download.
### YouTube
A playlist url: Download songs from a youtube playlist.
The default method to retrieve playlists doesn't always return all videos, especially not
the ones which are unavailable. To get all video titles, you can use the official API by
providing a key with --youtube-key. Get it here https://console.cloud.google.com. Create a
new project, click "Enable Api" and search for "youtube data", then follow the prompts.
Tip: For playlists containing music videos, it may be better to remove all text in parentheses
(to remove (Lyrics), (Official), etc) and disable song duration checking:
--regex "[\[\(].*?[\]\)]" --pref-length-tol -1
### Spotify
A playlist/album url or 'spotify-likes': Download a spotify playlist, album, or your
liked songs. Credentials are required when downloading a private playlist or liked music.
#### Using Credential/Application
Create a [Spotify application](https://developer.spotify.com/dashboard/applications) with a redirect url of `http://localhost:48721/callback`. Obtain an application **ID** and **Secret** from the created application dashboard.
Start sldl with the obtained credentials and an authorized action to trigger the Spotify app login flow:
```shell
sldl spotify-likes --number 1 --spotify-id 123456 --spotify-secret 123456 ...
```
sldl will try to open a browser automatically but will fallback to logging the login flow URL to output. After login flow is complete sldl will output a **Token** and **Refresh Token** and finish running the current command.
To skip requiring login flow every time `sldl` is used the **Token** and **Refresh Token** can be provided to sldl (hint: use `--config` and store this info in the config file to make commands less verbose):
```shell
sldl spotify-likes --number 1 --spotify-id 123456 --spotify-secret 123456 --spotify-refresh 123456 --spotify-token 123456 ...
```
`spotify-token` access is only valid for 1 hour. `spotify-refresh` will enable sldl to renew access every time it is run (and can be used without including `spotify-token`)
### Bandcamp
An bandcamp url: Download a single track, and album, or an artist's entire discography.
Extracts the artist name, album name and sets --album-track-count=""n+"", where n is the
number of visible tracks on the bandcamp page.
### Search string
Name of the track, album, or artist to search for: Can either be any typical search string
(like what you would enter into the soulseek search bar), or a comma-separated list of
properties like 'title=Song Name, artist=Artist Name, length=215'.
The following properties are allowed:
```
title
artist
album
length (in seconds)
artist-maybe-wrong
```
Example inputs and their interpretations:
```
Input String | Artist | Title | Album | Length
---------------------------------------------------------------------------------
'Foo Bar' (without any hyphens) | | Foo Bar | |
'Foo - Bar' | Foo | Bar | |
'Foo - Bar' (with --album enabled) | Foo | | Bar |
'Artist - Title, length=42' | Artist | Title | | 42
'artist=AR, title=T, album=AL' | AR | T | AL |
```
## Download modes
### Normal
The program will download a single file for every input entry.
### Album
sldl will search for the album and download an entire folder including non-audio
files. Activated when the input is a link to a spotify or bandcamp album, when the input
string or csv row has no track title, or when -a/--album is enabled.
### Aggregate
With -g/--aggregate, sldl will first perform an ordinary search for the input, then
attempt to group the results into distinct songs and download one of each kind. A common use
case is finding all remixes of a song or printing all songs by an artist that are not your
music dir.
Two files are considered equal if their inferred track title and artist name are equal
(ignoring case and some special characters), and their lengths are within --length-tol of each
other.
Note that this mode is not 100% reliable, which is why --min-users-aggregate is set to 2 by default,
i.e. any song that is shared by only one peer will be ignored. Enable --relax-filtering to
make the file filtering less aggressive.
### Album Aggregate
Activated when --album and --aggregate are enabled, in this mode sldl searches for the query
and groups results into distinct albums. Two folders are considered same if they have the
same number of audio files, and the durations of the files are within --length-tol of each
other (or within 3 seconds if length-tol is not configured). If both folders have exactly one
audio file with similar lengths, also checks if the inferred title and artist name coincide.
More reliable than normal aggregate due to much simpler grouping logic.
Note that --min-users-aggregate is 2 by default, which means that folders shared by only one
peer are ignored.
## Searching
### Soulseek's rate limits
The server will ban you for 30 minutes if too many searches are performed within a short
timespan. The program has a search limiter which can be adjusted with --searches-per-time
and --searches-renew-time (when the limit is reached, the status of the downloads will be
"Waiting"). By default it is configured to allow up to 34 searches every 220 seconds.
The default values were determined through experimentation, so they may be incorrect.
### Quality vs Speed
The following options will make it go faster, but may decrease search result quality or cause
instability:
- --fast-search skips waiting until the search completes and downloads as soon as a file
matching the preferred conditions is found
- --concurrent-downloads - set it to 4 or more
- --max-stale-time is set to 50 seconds by default, so it will wait a long time before giving
up on a file
- --searches-per-time increase at the risk of bans.
### Quality vs Quantity
The options --strict-title, --strict-artist and --strict-album will filter any file that
does not contain the title/artist/album in the filename (ignoring case, bounded by boundary
chars).
Another way to prevent false downloads is to set --length-tol to 3 or less to make it ignore
any songs that differ from the input by more than 3 seconds. However, all 4 options are already
enabled as 'preferred' conditions by default, meaning that such files will only be downloaded
as a last resort anyways. Hence it is only recommended to enable them if you need to minimize
false downloads as much as possible.
## File conditions
Files not satisfying the required conditions will not be downloaded. Files satisfying pref-
conditions will be preferred; setting --pref-format "flac,wav" will make it download lossless
files if available, and only download lossy files if there's nothing else.
There are no default required conditions. The default preferred conditions are:
```
format = mp3
length-tol = 3
min-bitrate = 200
max-bitrate = 2500
max-samplerate = 48000
strict-title = true
strict-album = true
accept-no-length = false
```
sldl will therefore prefer mp3 files with bitrate between 200 and 2500 kbps, and whose length
differs from the supplied length by no more than 3 seconds. It will also prefer files whose
paths contain the supplied artist and album (ignoring case, and bounded by boundary characters)
and which have a non-null length. Changing the last three preferred conditions is not recommended.
### Important note
Some info may be unavailable depending on the client used by the peer. For example, the standard
Soulseek client does not share the file bitrate. If (e.g) --min-bitrate is set, then sldl will
still accept any file with unknown bitrate. You can configure it to reject all files where one
or more of the checked properties is null (unknown) by enabling --strict-conditions.
As a consequence, if --min-bitrate is also set then any files shared by users with the default
client will be ignored. Also note that the default preferred conditions will already affect
ranking with this option due to the bitrate and samplerate checks.
Conditions can also be supplied as a semicolon-delimited string with --cond and --pref, e.g
--cond "br>=320;f=mp3,ogg;sr<96000"
## Name format
Variables enclosed in {} will be replaced by the corresponding file tag value.
Name format supports subdirectories as well as conditional expressions like {tag1|tag2} - If
tag1 is null, use tag2. String literals enclosed in parentheses are ignored in the null check.
### Examples:
- "{artist} - {title}"
Always name it 'Artist - Title'. Because some files on Soulseek are untagged, the
following is generally preferred:
- "{artist( - )title|filename}"
If artist and title are not null, name it 'Artist - Title', otherwise use the original
filename.
### Available variables:
```
artist First artist (from the file tags)
sartist Source artist (as on CSV/Spotify/YouTube/etc)
artists Artists, joined with '&'
albumartist First album artist
albumartists Album artists, joined with '&'
title Track title
stitle Source track title
album Album name
salbum Source album name
year Track year or date
track Track number
disc Disc number
foldername Soulseek folder name (only available for album downloads)
default-foldername Default sldl folder name
extractor Name of the extractor used (CSV/Spotify/YouTube/etc)
```
## Skip existing
sldl can skip downloads that exist in the output directory or a specified directory configured
with --music-dir.
The following modes are available for --skip-mode:
### m3u
Default when checking in the output directory.
Checks whether the output m3u file contains the track in the '#SLDL' line. Does not check if
the audio file exists or satisfies the file conditions (use m3u-cond for that). m3u and
m3u-cond are the only modes that can skip album downloads.
### name
Default when checking in the music directory.
Compares filenames to the track title and artist name to determine if a track already exists.
Specifically, a track will be skipped if there exists a file whose name contains the title
and whose full path contains the artist name.
### tag
Compares file tags to the track title and artist name. A track is skipped if there is a file
whose artist tag contains the track artist and whose title tag equals the track title
(ignoring case and ws). Slower than name mode as it needs to read all file tags.
### m3u-cond, name-cond, tag-cond
Same as the above modes but also checks whether the found file satisfies the configured
conditions. Uses necessary conditions by default, run with --skip-existing-pref-cond to use
preferred conditions instead. Equivalent to the above modes if no necessary conditions have
been specified (except m3u-cond, which always checks if the file exists).
May be slower and use a lot of memory for large libraries.
## Configuration
### Config Location:
sldl will look for a file named sldl.conf in the following locations:
```
~/AppData/Roaming/sldl/sldl.conf
~/.config/sldl/sldl.conf
```
as well as in the directory of the executable.
### Syntax:
Example config file:
```
username = your-username
password = your-password
pref-format = flac
fast-search = true
```
Lines starting with hashtags (#) will be ignored. Tildes in paths are expanded as the user
directory.
### Configuration profiles:
Profiles are supported:
```
[lossless]
pref-format = flac,wav
```
To activate the above profile, run --profile "lossless". To list all available profiles,
run --profile "help".
Profiles can be activated automatically based on a few simple conditions:
```
[no-stale]
profile-cond = interactive && download-mode == "album"
max-stale-time = 999999
# album downloads will never be automatically cancelled in interactive mode
[youtube]
profile-cond = input-type == "youtube"
path = ~/downloads/sldl-youtube
# download to another location for youtube
```
The following operators are supported: &&, ||, ==, !=, ! (negation for bools).
The following variables are available for use in profile-cond:
```
input-type ( = "youtube"|"csv"|"string"|"bandcamp"|"spotify")
download-mode ( = "normal"|"aggregate"|"album"|"album-aggregate")
interactive (bool)
```
## Examples
Download tracks from a csv file:
```
sldl test.csv
```
<br>
Download spotify likes while skipping songs that already exist in the output folder:
```
sldl spotify-likes --skip-existing
```
<br>
Download from a youtube playlist with fallback to yt-dlp in case it is not found on soulseek, and retrieve deleted video titles from wayback machine:
```
sldl "https://www.youtube.com/playlist?list=PLI_eFW8NAFzYAXZ5DrU6E6mQ_XfhaLBUX" --get-deleted --yt-dlp
```
<br>
Search & download a specific song, preferring lossless:
```
sldl "title=MC MENTAL @ HIS BEST,length=242" --pref-format "flac,wav"
```
<br>
Interactive album download:
```
sldl "album=Some Album" --interactive
```
<br>
Print all songs by an artist which are not in your library:
```
sldl "artist=MC MENTAL" --aggregate --skip-existing --music-dir "path/to/music" --print tracks-full
```
<br>
Download all albums:
```
sldl "artist=MC MENTAL" --aggregate --album
```
## Notes
- For macOS builds you can use publish.sh to build the app. Download dotnet from https://dotnet.microsoft.com/en-us/download/dotnet/6.0, then run `chmod +x publish.sh && sh publish.sh`. For intel macs, uncomment the x64 and comment the arm64 section in publish.sh.
- `--display single` and especially `double` can cause the printed lines to be duplicated or overwritten on some configurations. Use `simple` if that's an issue.
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