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13
Cargo.toml Normal file
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@ -0,0 +1,13 @@
[package]
name = "danbooru-dl"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
clap = { version = "4.4.11", features = ["derive"] }
isahc = "1.7.2"
serde_json = "1.0.108"
serde = { version = "1.0.193", features = ["derive"] }
url = "2.5.0"

45
src/counter.rs Normal file
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@ -0,0 +1,45 @@
use std::borrow::BorrowMut;
use isahc::{ReadResponseExt, Request, RequestExt};
use serde::Deserialize;
use crate::BASE_URL;
#[derive(Deserialize)]
struct CountsCounts {
posts: u64,
}
#[derive(Deserialize)]
struct CountsReponse {
counts: CountsCounts,
}
pub fn count(tags: String) -> Result<u64, String> {
let web_safe_tags: String = url::form_urlencoded::byte_serialize(tags.as_bytes()).collect();
let mut count_response = Request::get::<String>(format!(
"{}/counts/posts.json?tags={}",
BASE_URL, web_safe_tags
))
.body(())
.expect("Couldn't get body")
.send();
let text_try = match count_response.borrow_mut() {
Ok(res) => res.text(),
Err(err) => return Err(err.to_string()),
};
let text = match text_try {
Ok(text) => text,
Err(_) => return Err("Couldn't parse count body".into()),
};
let parsed = match serde_json::from_str::<CountsReponse>(&text) {
Ok(parsed) => parsed,
Err(e) => return Err(format!("Couldn't parse count text: {}", e.to_string()).into()),
};
Ok(parsed.counts.posts)
}

20
src/downloader.rs Normal file
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@ -0,0 +1,20 @@
use std::borrow::BorrowMut;
use isahc::{ReadResponseExt, Request, RequestExt};
pub fn download(file_url: &str) -> Result<Vec<u8>, String> {
// println!("{}", file_url);
let mut download_response = Request::get(file_url).body(()).expect("body error").send();
let bytes_try = match download_response.borrow_mut() {
Ok(res) => res.bytes(),
Err(err) => return Err(err.to_string()),
};
let bytes = match bytes_try {
Ok(bytes) => bytes,
Err(_) => return Err("Couldn't parse downloaded image body".into()),
};
Ok(bytes)
}

89
src/getter.rs Normal file
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@ -0,0 +1,89 @@
use std::borrow::BorrowMut;
use isahc::{ReadResponseExt, Request, RequestExt};
use serde::Deserialize;
use crate::{counter::count, BASE_URL};
#[derive(Deserialize, Debug)]
#[serde(untagged)]
enum PostsResponse {
DanbooruPosts(Vec<DanbooruPost>),
DanbooruError(DanbooruError),
}
#[derive(Deserialize, Debug)]
pub struct DanbooruPost {
pub large_file_url: Option<String>,
pub id: u64,
pub file_size: Option<u64>,
}
#[derive(Deserialize, Debug)]
pub struct DanbooruError {
pub error: String,
pub message: String,
}
pub fn get_posts(tags: String, limit: u64) -> Result<Vec<DanbooruPost>, String> {
let mut posts: Vec<DanbooruPost> = vec![];
let mut count = count(tags.clone())?;
if limit != 0 && count > limit {
count = limit;
};
while (posts.len() as u64) < count {
let id_part = if let Some(post) = posts.first() {
format!("id:<={}", post.id)
} else {
"".into()
};
let mod_tags = format!("{} {}", tags, id_part);
let posts_to_get = if count > 200 { 200 } else { count };
let web_safe_tags: String =
url::form_urlencoded::byte_serialize(mod_tags.as_bytes()).collect();
let mut status_response = Request::get::<String>(format!(
"{}/posts.json?tags={}&limit={}&page={}",
BASE_URL,
web_safe_tags,
posts_to_get,
(posts.len() / 200) as u64 + 1
))
.body(())
.expect("body error")
.send();
let text_try = match status_response.borrow_mut() {
Ok(res) => res.text(),
Err(err) => return Err(err.to_string()),
};
let text = match text_try {
Ok(text) => text,
Err(_) => return Err("Couldn't parse posts body".into()),
};
let parsed = match serde_json::from_str::<PostsResponse>(&text) {
Ok(parsed) => parsed,
Err(e) => return Err(format!("Couldn't parse posts text: {}", e.to_string()).into()),
};
let mut posts_response = match parsed {
PostsResponse::DanbooruPosts(posts) => posts,
PostsResponse::DanbooruError(err) => return Err(err.message),
};
if posts_response.len() == 0 {
println!("Length of posts is 0, breaking");
break;
};
posts.append(&mut posts_response);
println!("Got {}/{} posts", posts.len(), count);
}
Ok(posts)
}

136
src/main.rs Normal file
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@ -0,0 +1,136 @@
use clap::Parser;
use std::fs::File;
use std::io::Write;
use std::path::Path;
use std::{fs, process};
pub const BASE_URL: &'static str = "https://danbooru.donmai.us";
mod counter;
mod downloader;
mod getter;
mod util;
use downloader::download;
use crate::util::filter_posts;
/// A bulk image downloader
#[derive(Parser, Debug)]
#[command(author, version, about, long_about = None)]
struct Args {
/// List of tags separated by spaces
tags: Vec<String>,
/// Folder to output images into
#[arg(short, long, default_value = "danbooru downloads")]
out: String,
/// Get first n posts from the query. Set to 0 for infinite
#[arg(short, long, default_value_t = 0)]
limit: u64,
}
fn main() {
let mut args = Args::parse();
if args.out.ends_with("/") {
args.out.pop();
};
let posts = match getter::get_posts(args.tags.join(" "), args.limit) {
Ok(posts) => posts,
Err(e) => {
println!("Error: {}", e);
process::exit(1);
}
};
let results_amount = posts.len();
if results_amount == 0 {
println!("The query returned no results")
}
// filter out posts we already have downloaded in the outfolder
let (posts, downloaded, failed) = filter_posts(&args.out, posts);
if posts.len() == 0 {
println!("There is nothing to do.");
let downloaded_text = format!(
"You already have {} post{} downloaded",
downloaded,
if downloaded > 1 { "s" } else { "" }
);
let failed_text = format!(
"{}{} post{} can't be accessed",
if downloaded > 0 { " and " } else { "" },
failed,
if failed > 1 { "s" } else { "" }
);
println!(
"{}{}",
if downloaded > 0 {
downloaded_text
} else {
"".into()
},
if failed > 0 { failed_text } else { "".into() }
);
process::exit(0);
}
let mut total_size: u64 = 0;
for p in &posts {
total_size += p.file_size;
}
println!(
"You're about to download {:.2} MB ({} posts)",
total_size / 1024 / 1024,
posts.len(),
);
let confirmation = util::ask_confirm("Continue?");
if !confirmation {
println!("Exiting...");
process::exit(0);
};
if !Path::new(&args.out).exists() {
if fs::create_dir_all(&args.out).is_err() {
println!("Couldn't create the folder");
process::exit(1);
};
};
let mut posts_got: u64 = 0;
let mut downloaded: u64 = 0;
for post in &posts {
let download_bytes = download(post.file_url.as_str()).unwrap();
let file_extension = match util::get_extension(post.file_url.as_str()) {
Ok(extension) => extension,
Err(_) => {
println!("Failed to get file extension: {}", post.id);
continue;
}
};
let mut f = File::create(format!("{}/{}.{}", args.out, post.id, file_extension))
.expect("create error");
f.write_all(download_bytes.as_slice()).expect("write error");
downloaded += post.file_size;
posts_got += 1;
println!(
"Downloaded {}/{} posts ({}/{} MB)",
posts_got,
posts.len(),
downloaded / 1024 / 1024,
total_size / 1024 / 1024
);
}
}

77
src/util.rs Normal file
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@ -0,0 +1,77 @@
use std::path::Path;
use serde::Deserialize;
use url::Url;
use crate::getter::DanbooruPost;
pub fn ask_confirm(question: &str) -> bool {
println!("{}", question);
loop {
let mut input = String::new();
let _ = std::io::stdin().read_line(&mut input);
match input.trim().chars().next() {
Some('y') | Some('Y') => return true,
Some('n') | Some('N') => return false,
_ => println!("y/n only please."),
}
}
}
pub fn get_extension(file_url: &str) -> Result<String, ()> {
match Url::parse(file_url)
.ok()
.as_mut()
.and_then(|url| url.path_segments())
.and_then(|path| path.last().map(|file_name| file_name.to_string()))
.and_then(|file_name| file_name.split('.').last().map(|ext| ext.to_string()))
{
Some(extension) => Ok(extension),
None => Err(()),
}
}
#[derive(Deserialize, Debug)]
pub struct FilteredDanbooruPost {
pub id: u64,
pub file_url: String,
pub file_size: u64,
}
pub fn filter_posts(path: &str, posts: Vec<DanbooruPost>) -> (Vec<FilteredDanbooruPost>, u64, u64) {
let mut downloaded = 0;
let mut failed = 0;
let filtered_posts: Vec<FilteredDanbooruPost> = posts
.into_iter()
.filter_map(|p| {
if let (Some(file_url), Some(file_size)) = (p.large_file_url, p.file_size) {
Some(FilteredDanbooruPost {
id: p.id,
file_url,
file_size,
})
} else {
failed += 1;
None
}
})
.filter(|post| match get_extension(post.file_url.as_str()) {
Ok(extension) => {
let filename = format!("{}/{}.{}", path, post.id, extension);
if Path::new(&filename).exists() {
downloaded += 1;
false
} else {
true
}
}
Err(_) => {
println!("Failed to get file extension for post: {}", post.id);
false
}
})
.collect();
(filtered_posts, downloaded, failed)
}