pict-rs/src/main.rs

780 lines
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use actix_form_data::{Field, Form, Value};
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use actix_web::{
guard,
http::header::{CacheControl, CacheDirective, LastModified, ACCEPT_RANGES},
middleware::Logger,
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web, App, HttpResponse, HttpResponseBuilder, HttpServer,
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};
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use awc::Client;
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use futures_core::stream::Stream;
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use once_cell::sync::Lazy;
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use std::{collections::HashSet, future::ready, path::PathBuf, time::SystemTime};
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use structopt::StructOpt;
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use tokio::io::{AsyncReadExt, AsyncWriteExt};
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use tracing::{debug, error, info, instrument, Span};
use tracing_subscriber::EnvFilter;
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mod config;
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mod error;
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mod exiftool;
mod ffmpeg;
mod magick;
mod middleware;
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mod migrate;
mod processor;
mod range;
mod stream;
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mod upload_manager;
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mod validate;
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use self::{
config::{Config, Format},
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error::UploadError,
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middleware::{Internal, Tracing},
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stream::{once, LocalBoxStream},
upload_manager::{Details, UploadManager},
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validate::{image_webp, video_mp4},
};
const MEGABYTES: usize = 1024 * 1024;
const MINUTES: u32 = 60;
const HOURS: u32 = 60 * MINUTES;
const DAYS: u32 = 24 * HOURS;
static TMP_DIR: Lazy<PathBuf> = Lazy::new(|| {
use rand::{
distributions::{Alphanumeric, Distribution},
thread_rng,
};
let mut rng = thread_rng();
let tmp_nonce = Alphanumeric
.sample_iter(&mut rng)
.take(7)
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.map(char::from)
.collect::<String>();
let mut path = std::env::temp_dir();
path.push(format!("pict-rs-{}", tmp_nonce));
path
});
static CONFIG: Lazy<Config> = Lazy::new(Config::from_args);
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// try moving a file
#[instrument]
async fn safe_move_file(from: PathBuf, to: PathBuf) -> Result<(), UploadError> {
if let Some(path) = to.parent() {
debug!("Creating directory {:?}", path);
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tokio::fs::create_dir_all(path).await?;
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}
debug!("Checking if {:?} already exists", to);
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if let Err(e) = tokio::fs::metadata(&to).await {
if e.kind() != std::io::ErrorKind::NotFound {
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return Err(e.into());
}
} else {
return Err(UploadError::FileExists);
}
debug!("Moving {:?} to {:?}", from, to);
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tokio::fs::copy(&from, to).await?;
tokio::fs::remove_file(from).await?;
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Ok(())
}
async fn safe_create_parent<P>(path: P) -> Result<(), UploadError>
where
P: AsRef<std::path::Path>,
{
if let Some(path) = path.as_ref().parent() {
debug!("Creating directory {:?}", path);
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tokio::fs::create_dir_all(path).await?;
}
Ok(())
}
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// Try writing to a file
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#[instrument(skip(bytes))]
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async fn safe_save_file(path: PathBuf, mut bytes: web::Bytes) -> Result<(), UploadError> {
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if let Some(path) = path.parent() {
// create the directory for the file
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debug!("Creating directory {:?}", path);
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tokio::fs::create_dir_all(path).await?;
}
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// Only write the file if it doesn't already exist
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debug!("Checking if {:?} already exists", path);
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if let Err(e) = tokio::fs::metadata(&path).await {
if e.kind() != std::io::ErrorKind::NotFound {
return Err(e.into());
}
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} else {
return Ok(());
}
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// Open the file for writing
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debug!("Creating {:?}", path);
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let mut file = tokio::fs::File::create(&path).await?;
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// try writing
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debug!("Writing to {:?}", path);
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if let Err(e) = file.write_all_buf(&mut bytes).await {
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error!("Error writing {:?}, {}", path, e);
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// remove file if writing failed before completion
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tokio::fs::remove_file(path).await?;
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return Err(e.into());
}
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debug!("{:?} written", path);
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Ok(())
}
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pub(crate) fn tmp_file() -> PathBuf {
use rand::distributions::{Alphanumeric, Distribution};
let limit: usize = 10;
let rng = rand::thread_rng();
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let s: String = Alphanumeric
.sample_iter(rng)
.take(limit)
.map(char::from)
.collect();
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let name = format!("{}.tmp", s);
let mut path = TMP_DIR.clone();
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path.push(&name);
path
}
fn to_ext(mime: mime::Mime) -> Result<&'static str, UploadError> {
if mime == mime::IMAGE_PNG {
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Ok(".png")
} else if mime == mime::IMAGE_JPEG {
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Ok(".jpg")
} else if mime == video_mp4() {
Ok(".mp4")
} else if mime == image_webp() {
Ok(".webp")
} else {
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Err(UploadError::UnsupportedFormat)
}
}
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/// Handle responding to succesful uploads
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#[instrument(skip(value, manager))]
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async fn upload(
value: Value,
manager: web::Data<UploadManager>,
) -> Result<HttpResponse, UploadError> {
let images = value
.map()
.and_then(|mut m| m.remove("images"))
.and_then(|images| images.array())
.ok_or(UploadError::NoFiles)?;
let mut files = Vec::new();
for image in images.into_iter().filter_map(|i| i.file()) {
if let Some(alias) = image
.saved_as
.as_ref()
.and_then(|s| s.file_name())
.and_then(|s| s.to_str())
{
info!("Uploaded {} as {:?}", image.filename, alias);
let delete_token = manager.delete_token(alias.to_owned()).await?;
let name = manager.from_alias(alias.to_owned()).await?;
let mut path = manager.image_dir();
path.push(name.clone());
let details = manager.variant_details(path.clone(), name.clone()).await?;
let details = if let Some(details) = details {
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debug!("details exist");
details
} else {
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debug!("generating new details from {:?}", path);
let new_details = Details::from_path(path.clone()).await?;
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debug!("storing details for {:?} {}", path, name);
manager
.store_variant_details(path, name, &new_details)
.await?;
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debug!("stored");
new_details
};
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files.push(serde_json::json!({
"file": alias,
"delete_token": delete_token,
"details": details,
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}));
}
}
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Ok(HttpResponse::Created().json(&serde_json::json!({
"msg": "ok",
"files": files
})))
}
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#[derive(Debug, serde::Deserialize)]
struct UrlQuery {
url: String,
}
/// download an image from a URL
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#[instrument(skip(client, manager))]
async fn download(
client: web::Data<Client>,
manager: web::Data<UploadManager>,
query: web::Query<UrlQuery>,
) -> Result<HttpResponse, UploadError> {
let mut res = client.get(&query.url).send().await?;
if !res.status().is_success() {
return Err(UploadError::Download(res.status()));
}
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let fut = res.body().limit(CONFIG.max_file_size() * MEGABYTES);
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let stream = Box::pin(once(fut));
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let alias = manager.upload(stream).await?;
let delete_token = manager.delete_token(alias.clone()).await?;
let name = manager.from_alias(alias.to_owned()).await?;
let mut path = manager.image_dir();
path.push(name.clone());
let details = manager.variant_details(path.clone(), name.clone()).await?;
let details = if let Some(details) = details {
details
} else {
let new_details = Details::from_path(path.clone()).await?;
manager
.store_variant_details(path, name, &new_details)
.await?;
new_details
};
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Ok(HttpResponse::Created().json(&serde_json::json!({
"msg": "ok",
"files": [{
"file": alias,
"delete_token": delete_token,
"details": details,
}]
})))
}
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/// Delete aliases and files
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#[instrument(skip(manager))]
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async fn delete(
manager: web::Data<UploadManager>,
path_entries: web::Path<(String, String)>,
) -> Result<HttpResponse, UploadError> {
let (alias, token) = path_entries.into_inner();
manager.delete(token, alias).await?;
Ok(HttpResponse::NoContent().finish())
}
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type ProcessQuery = Vec<(String, String)>;
async fn prepare_process(
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query: web::Query<ProcessQuery>,
ext: &str,
manager: &UploadManager,
whitelist: &Option<HashSet<String>>,
) -> Result<(Format, String, PathBuf, Vec<String>), UploadError> {
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let (alias, operations) =
query
.into_inner()
.into_iter()
.fold((String::new(), Vec::new()), |(s, mut acc), (k, v)| {
if k == "src" {
(v, acc)
} else {
acc.push((k, v));
(s, acc)
}
});
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if alias == "" {
return Err(UploadError::MissingFilename);
}
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let name = manager.from_alias(alias).await?;
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let operations = if let Some(whitelist) = whitelist.as_ref() {
operations
.into_iter()
.filter(|(k, _)| whitelist.contains(&k.to_lowercase()))
.collect()
} else {
operations
};
let chain = self::processor::build_chain(&operations);
let format = ext
.parse::<Format>()
.map_err(|_| UploadError::UnsupportedFormat)?;
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let processed_name = format!("{}.{}", name, ext);
let base = manager.image_dir();
let thumbnail_path = self::processor::build_path(base, &chain, processed_name);
let thumbnail_args = self::processor::build_args(&chain);
Ok((format, name, thumbnail_path, thumbnail_args))
}
async fn process_details(
query: web::Query<ProcessQuery>,
ext: web::Path<String>,
manager: web::Data<UploadManager>,
whitelist: web::Data<Option<HashSet<String>>>,
) -> Result<HttpResponse, UploadError> {
let (_, name, thumbnail_path, _) =
prepare_process(query, ext.as_str(), &manager, &whitelist).await?;
let details = manager.variant_details(thumbnail_path, name).await?;
let details = details.ok_or(UploadError::NoFiles)?;
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Ok(HttpResponse::Ok().json(&details))
}
/// Process files
#[instrument(skip(manager, whitelist))]
async fn process(
range: Option<range::RangeHeader>,
query: web::Query<ProcessQuery>,
ext: web::Path<String>,
manager: web::Data<UploadManager>,
whitelist: web::Data<Option<HashSet<String>>>,
) -> Result<HttpResponse, UploadError> {
let (format, name, thumbnail_path, thumbnail_args) =
prepare_process(query, ext.as_str(), &manager, &whitelist).await?;
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// If the thumbnail doesn't exist, we need to create it
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let thumbnail_exists = if let Err(e) = tokio::fs::metadata(&thumbnail_path).await {
if e.kind() != std::io::ErrorKind::NotFound {
error!("Error looking up processed image, {}", e);
return Err(e.into());
}
false
} else {
true
};
let details = manager
.variant_details(thumbnail_path.clone(), name.clone())
.await?;
if !thumbnail_exists || details.is_none() {
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let mut original_path = manager.image_dir();
original_path.push(name.clone());
// Create and save a JPG for motion images (gif, mp4)
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if let Some((updated_path, exists)) =
self::processor::prepare_image(original_path.clone()).await?
{
original_path = updated_path.clone();
if exists.is_new() {
// Save the transcoded file in another task
debug!("Spawning storage task");
let span = Span::current();
let manager2 = manager.clone();
let name = name.clone();
actix_rt::spawn(async move {
let entered = span.enter();
if let Err(e) = manager2.store_variant(updated_path, name).await {
error!("Error storing variant, {}", e);
return;
}
drop(entered);
});
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}
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}
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let file = tokio::fs::File::open(original_path.clone()).await?;
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let mut processed_reader =
crate::magick::process_image_write_read(file, thumbnail_args, format)?;
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let mut vec = Vec::new();
processed_reader.read_to_end(&mut vec).await?;
let bytes = web::Bytes::from(vec);
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let details = if let Some(details) = details {
details
} else {
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Details::from_bytes(bytes.clone()).await?
};
let span = tracing::Span::current();
let details2 = details.clone();
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let bytes2 = bytes.clone();
actix_rt::spawn(async move {
let entered = span.enter();
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if let Err(e) = safe_save_file(thumbnail_path.clone(), bytes2).await {
tracing::warn!("Error saving thumbnail: {}", e);
return;
}
if let Err(e) = manager
.store_variant_details(thumbnail_path.clone(), name.clone(), &details2)
.await
{
tracing::warn!("Error saving variant details: {}", e);
return;
}
if let Err(e) = manager.store_variant(thumbnail_path, name.clone()).await {
tracing::warn!("Error saving variant info: {}", e);
}
drop(entered);
});
return Ok(srv_response(
HttpResponse::Ok(),
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once(ready(Ok(bytes) as Result<_, UploadError>)),
details.content_type(),
7 * DAYS,
details.system_time(),
));
}
let details = if let Some(details) = details {
details
} else {
let details = Details::from_path(thumbnail_path.clone()).await?;
manager
.store_variant_details(thumbnail_path.clone(), name, &details)
.await?;
details
};
ranged_file_resp(thumbnail_path, range, details).await
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}
/// Fetch file details
async fn details(
alias: web::Path<String>,
manager: web::Data<UploadManager>,
) -> Result<HttpResponse, UploadError> {
let name = manager.from_alias(alias.into_inner()).await?;
let mut path = manager.image_dir();
path.push(name.clone());
let details = manager.variant_details(path.clone(), name.clone()).await?;
let details = if let Some(details) = details {
details
} else {
let new_details = Details::from_path(path.clone()).await?;
manager
.store_variant_details(path.clone(), name, &new_details)
.await?;
new_details
};
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Ok(HttpResponse::Ok().json(&details))
}
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/// Serve files
#[instrument(skip(manager))]
async fn serve(
range: Option<range::RangeHeader>,
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alias: web::Path<String>,
manager: web::Data<UploadManager>,
) -> Result<HttpResponse, UploadError> {
let name = manager.from_alias(alias.into_inner()).await?;
let mut path = manager.image_dir();
path.push(name.clone());
let details = manager.variant_details(path.clone(), name.clone()).await?;
let details = if let Some(details) = details {
details
} else {
let details = Details::from_path(path.clone()).await?;
manager
.store_variant_details(path.clone(), name, &details)
.await?;
details
};
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ranged_file_resp(path, range, details).await
}
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async fn ranged_file_resp(
path: PathBuf,
range: Option<range::RangeHeader>,
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details: Details,
) -> Result<HttpResponse, UploadError> {
let (builder, stream) = match range {
//Range header exists - return as ranged
Some(range_header) => {
if !range_header.is_bytes() {
return Err(UploadError::Range);
}
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if range_header.is_empty() {
return Err(UploadError::Range);
} else if range_header.len() == 1 {
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let file = tokio::fs::File::open(path).await?;
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let meta = file.metadata().await?;
let range = range_header.ranges().next().unwrap();
let mut builder = HttpResponse::PartialContent();
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builder.insert_header(range.to_content_range(meta.len()));
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(builder, range.chop_file(file).await?)
} else {
return Err(UploadError::Range);
}
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}
//No Range header in the request - return the entire document
None => {
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let file = tokio::fs::File::open(path).await?;
let stream = Box::pin(crate::stream::bytes_stream(file)) as LocalBoxStream<'_, _>;
(HttpResponse::Ok(), stream)
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}
};
Ok(srv_response(
builder,
stream,
details.content_type(),
7 * DAYS,
details.system_time(),
))
}
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// A helper method to produce responses with proper cache headers
fn srv_response<S, E>(
mut builder: HttpResponseBuilder,
stream: S,
ext: mime::Mime,
expires: u32,
modified: SystemTime,
) -> HttpResponse
where
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S: Stream<Item = Result<web::Bytes, E>> + Unpin + 'static,
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E: std::error::Error + 'static,
actix_web::Error: From<E>,
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{
builder
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.insert_header(LastModified(modified.into()))
.insert_header(CacheControl(vec![
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CacheDirective::Public,
CacheDirective::MaxAge(expires),
CacheDirective::Extension("immutable".to_owned(), None),
]))
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.insert_header((ACCEPT_RANGES, "bytes"))
.content_type(ext.to_string())
.streaming(stream)
}
#[derive(Debug, serde::Deserialize)]
#[serde(untagged)]
enum FileOrAlias {
File { file: String },
Alias { alias: String },
}
async fn purge(
query: web::Query<FileOrAlias>,
upload_manager: web::Data<UploadManager>,
) -> Result<HttpResponse, UploadError> {
let aliases = match query.into_inner() {
FileOrAlias::File { file } => upload_manager.aliases_by_filename(file).await?,
FileOrAlias::Alias { alias } => upload_manager.aliases_by_alias(alias).await?,
};
for alias in aliases.iter() {
upload_manager
.delete_without_token(alias.to_owned())
.await?;
}
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Ok(HttpResponse::Ok().json(&serde_json::json!({
"msg": "ok",
"aliases": aliases
})))
}
async fn aliases(
query: web::Query<FileOrAlias>,
upload_manager: web::Data<UploadManager>,
) -> Result<HttpResponse, UploadError> {
let aliases = match query.into_inner() {
FileOrAlias::File { file } => upload_manager.aliases_by_filename(file).await?,
FileOrAlias::Alias { alias } => upload_manager.aliases_by_alias(alias).await?,
};
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Ok(HttpResponse::Ok().json(&serde_json::json!({
"msg": "ok",
"aliases": aliases,
})))
}
#[derive(Debug, serde::Deserialize)]
struct ByAlias {
alias: String,
}
async fn filename_by_alias(
query: web::Query<ByAlias>,
upload_manager: web::Data<UploadManager>,
) -> Result<HttpResponse, UploadError> {
let filename = upload_manager.from_alias(query.into_inner().alias).await?;
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Ok(HttpResponse::Ok().json(&serde_json::json!({
"msg": "ok",
"filename": filename,
})))
}
#[actix_rt::main]
async fn main() -> Result<(), anyhow::Error> {
if std::env::var("RUST_LOG").is_err() {
std::env::set_var("RUST_LOG", "info");
}
tracing_subscriber::fmt()
.with_env_filter(EnvFilter::from_default_env())
.init();
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let manager = UploadManager::new(CONFIG.data_dir(), CONFIG.format()).await?;
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// Create a new Multipart Form validator
//
// This form is expecting a single array field, 'images' with at most 10 files in it
let manager2 = manager.clone();
let form = Form::new()
.max_files(10)
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.max_file_size(CONFIG.max_file_size() * MEGABYTES)
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.transform_error(|e| UploadError::from(e).into())
.field(
"images",
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Field::array(Field::file(move |filename, _, stream| {
let manager = manager2.clone();
async move {
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let span = tracing::info_span!("file-upload", ?filename);
let entered = span.enter();
let res = manager.upload(stream).await.map(|alias| {
let mut path = PathBuf::new();
path.push(alias);
Some(path)
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});
drop(entered);
res
}
})),
);
// Create a new Multipart Form validator for internal imports
//
// This form is expecting a single array field, 'images' with at most 10 files in it
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let validate_imports = CONFIG.validate_imports();
let manager2 = manager.clone();
let import_form = Form::new()
.max_files(10)
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.max_file_size(CONFIG.max_file_size() * MEGABYTES)
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.transform_error(|e| UploadError::from(e).into())
.field(
"images",
Field::array(Field::file(move |filename, content_type, stream| {
let manager = manager2.clone();
async move {
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let span = tracing::info_span!("file-import", ?filename);
let entered = span.enter();
let res = manager
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.import(filename, content_type, validate_imports, stream)
.await
.map(|alias| {
let mut path = PathBuf::new();
path.push(alias);
Some(path)
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});
drop(entered);
res
}
})),
);
HttpServer::new(move || {
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let client = Client::builder()
.header("User-Agent", "pict-rs v0.1.0-master")
.finish();
App::new()
.wrap(Logger::default())
.wrap(Tracing)
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.app_data(web::Data::new(manager.clone()))
.app_data(web::Data::new(client))
.app_data(web::Data::new(CONFIG.filter_whitelist()))
.service(
web::scope("/image")
.service(
web::resource("")
.guard(guard::Post())
.wrap(form.clone())
.route(web::post().to(upload)),
)
.service(web::resource("/download").route(web::get().to(download)))
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.service(
web::resource("/delete/{delete_token}/{filename}")
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.route(web::delete().to(delete))
.route(web::get().to(delete)),
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)
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.service(web::resource("/original/{filename}").route(web::get().to(serve)))
.service(web::resource("/process.{ext}").route(web::get().to(process)))
.service(
web::scope("/details")
.service(
web::resource("/original/{filename}").route(web::get().to(details)),
)
.service(
web::resource("/process.{ext}")
.route(web::get().to(process_details)),
),
),
)
.service(
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web::scope("/internal")
.wrap(Internal(CONFIG.api_key().map(|s| s.to_owned())))
.service(
web::resource("/import")
.wrap(import_form.clone())
.route(web::post().to(upload)),
)
.service(web::resource("/purge").route(web::post().to(purge)))
.service(web::resource("/aliases").route(web::get().to(aliases)))
.service(web::resource("/filename").route(web::get().to(filename_by_alias))),
)
})
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.bind(CONFIG.bind_address())?
.run()
.await?;
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if tokio::fs::metadata(&*TMP_DIR).await.is_ok() {
tokio::fs::remove_dir_all(&*TMP_DIR).await?;
}
Ok(())
}