css focus styling

Cargo.toml

@@ -9,7 +9,7 @@ edition = "2018"
 [dependencies]
 actix-web = "3.3.2"
 sqlx = { version = "0.5.1", default-features = false, features = [ "runtime-async-std-rustls", "postgres", "chrono" ] }
-env_logger = "0.8.3"
+env_logger = "0.9.0"
 log = "0.4.14"
 actix-files = "0.5.0"
 async-std = "1.9.0"
@@ -18,6 +18,7 @@ futures = "0.3.13"
 rand = "0.8.3"
 chrono = "0.4.19"
 htmlescape = "0.3.1"
-urlencoding = "1.1.1"
-tree_magic_mini = "1.0.1"
+urlencoding = "2.1.0"
+tree_magic_mini = { version = "3.0.0", features = ["with-gpl-data"] }
 mime = "0.3.16"
+url = "2.2.2"

Dockerfile

@@ -1,4 +1,4 @@
-FROM ekidd/rust-musl-builder:latest as build
+FROM ekidd/rust-musl-builder:beta as build
 
 USER rust
 WORKDIR /home/rust/src/
@@ -11,6 +11,7 @@ RUN cargo build --release
 COPY --chown=rust src ./src
 COPY --chown=rust static ./static
 COPY --chown=rust template ./template
+COPY --chown=rust snippet ./snippet
 COPY --chown=rust init-db.sql ./init-db.sql
 RUN touch src/main.rs
 RUN cargo build --release

LICENSE

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
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+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

README.md

@@ -25,17 +25,40 @@ docker-compose up -d --build
 
 ## running & config
 
-The static files directory needs to be next to the binary.
+- The static files directory needs to be next to the binary.
+- The maximum filename length is 255
 
-| environment variable | default value        |
-| -------------------- | -------------------- |
-| DATABASE_URL         |                      |
-| DATABASE_USER        |                      |
-| DATABASE_PASS        |                      |
-| DATABASE_HOST        | localhost            |
-| DATABASE_NAME        | datatrash            |
-| FILES_DIR            | ./files              |
-| UPLOAD_MAX_BYTES     | 8388608 (8MiB)       |
-| BIND_ADDRESS         | 0.0.0.0:8000         |
+### General configuration
 
-The maximum filename length is 255
+| environment variable | default value  |
+| -------------------- | -------------- |
+| FILES_DIR            | ./files        |
+| UPLOAD_MAX_BYTES     | 8388608 (8MiB) |
+| BIND_ADDRESS         | 0.0.0.0:8000   |
+
+### Database configuration
+
+| environment variable | default value |
+| -------------------- | ------------- |
+| DATABASE_URL         |               |
+| DATABASE_USER        |               |
+| DATABASE_PASS        |               |
+| DATABASE_HOST        | localhost     |
+| DATABASE_NAME        | datatrash     |
+
+### No auth limits configuration
+
+Require authentication for certain uploads
+
+- The password is provided as plain text
+- Uploads with longer validity than NO_AUTH_MAX_TIME require authentication
+- Uploads larger than NO_AUTH_LARGE_FILE_SIZE require auth when they are valid for longer than
+  NO_AUTH_LARGE_FILE_MAX_TIME
+- All times are in seconds, the size is in bytes
+
+| environment variable        | default value |
+| --------------------------- | ------------- |
+| AUTH_PASSWORD               |               |
+| NO_AUTH_MAX_TIME            |               |
+| NO_AUTH_LARGE_FILE_MAX_TIME |               |
+| NO_AUTH_LARGE_FILE_SIZE     |               |

docker-compose.yml

@@ -2,16 +2,38 @@ version: "3.3"
 services:
   datatrash:
     build: .
+    container_name: datatrash
+    volumes:
+      - /data/datatrash/files:/opt/datatrash/files
     environment:
-      DATABASE_USER: admin
-      DATABASE_PASSWORD: secure
-      DATABASE_HOST: postgres
-    ports:
-      - '8000:8000'
-  postgres:
+      DATABASE_HOST: db
+      DATABASE_USER: datatrash
+      DATABASE_PASS: jNmLZYr75as0W5TY7iSaIEVPSa2awaWAAgC5Zt8JsRAXbYrscLW4Dk7ZxHL1Bu4v
+      UPLOAD_MAX_BYTES: 1073741824
+      AUTH_PASSWORD: peter123
+      NO_AUTH_MAX_TIME: 604800
+      NO_AUTH_LARGE_FILE_MAX_TIME: 1800
+      NO_AUTH_LARGE_FILE_SIZE: 10485760
+    networks:
+      - default
+      - nginx
+    restart: unless-stopped
+    depends_on:
+      - db
+  db:
     image: postgres
+    container_name: datatrash-db
+    volumes:
+      - /data/datatrash/db:/var/lib/postgresql/data
     environment:
-      POSTGRES_USER: admin
-      POSTGRES_PASSWORD: secure
-
+      POSTGRES_DB: datatrash
+      POSTGRES_USER: datatrash
+      POSTGRES_PASSWORD: jNmLZYr75as0W5TY7iSaIEVPSa2awaWAAgC5Zt8JsRAXbYrscLW4Dk7ZxHL1Bu4v
+    restart: unless-stopped
+    networks:
+      - default
 
+networks:
+  nginx:
+    external:
+      name: nginx_default

init-db.sql

@@ -8,3 +8,4 @@ CREATE TABLE IF NOT EXISTS files (
 );
 
 ALTER TABLE files ADD COLUMN IF NOT EXISTS delete_on_download boolean;
+ALTER TABLE files ALTER COLUMN delete_on_download set not null;

snippet/auth.html.snippet

@@ -0,0 +1,9 @@
+
+        <div id="password-input">
+          <label for="password">
+            passwort benötigt (&gt;{auth_time} oder datei &gt;{auth_large_size} und &gt;{auth_large_time})
+          </label>
+          <br />
+          <input id="password" name="password" type="password" />
+        </div>
+        <script src="/assets/auth-hide.js" lang="javascript"></script>

snippet/max_size.html.snippet

@@ -0,0 +1 @@
+ (maximal {max_size})

src/config.rs

@@ -1,11 +1,21 @@
 use std::env;
 
 use async_std::{fs, path::PathBuf};
+use chrono::Duration;
 
 #[derive(Clone)]
 pub struct Config {
     pub files_dir: PathBuf,
     pub max_file_size: Option<u64>,
+    pub no_auth_limits: Option<NoAuthLimits>,
+}
+
+#[derive(Clone)]
+pub struct NoAuthLimits {
+    pub auth_password: String,
+    pub max_time: Duration,
+    pub large_file_max_time: Duration,
+    pub large_file_size: u64,
 }
 
 pub async fn get_config() -> Config {
@@ -20,8 +30,35 @@ pub async fn get_config() -> Config {
         .await
         .expect("could not create directory for storing files");
 
+    let no_auth_limits = get_no_auth_limits();
+
     Config {
         files_dir,
         max_file_size,
+        no_auth_limits,
     }
 }
+
+fn get_no_auth_limits() -> Option<NoAuthLimits> {
+    match (
+        env::var("AUTH_PASSWORD").ok(),
+        env_number("NO_AUTH_MAX_TIME"),
+        env_number("NO_AUTH_LARGE_FILE_MAX_TIME"),
+        env_number("NO_AUTH_LARGE_FILE_SIZE"),
+    ) {
+        (Some(auth_password), Some(max_time), Some(large_file_max_time), Some(large_file_size)) => {
+            Some(NoAuthLimits {
+                auth_password,
+                max_time: Duration::seconds(max_time as i64),
+                large_file_max_time: Duration::seconds(large_file_max_time as i64),
+                large_file_size,
+            })
+        }
+        (None, None, None, None) => None,
+        _ => panic!("Incomplete NO_AUTH configuration: All environment variables must be specified")
+    }
+}
+
+fn env_number(variable: &str) -> Option<u64> {
+    env::var(variable).ok().and_then(|n| n.parse::<u64>().ok())
+}

src/deleter.rs

@@ -36,7 +36,7 @@ pub(crate) async fn delete_by_id(
     file_id: &str,
     files_dir: &Path,
 ) -> Result<(), sqlx::Error> {
-    delete_content(file_id, &files_dir).await?;
+    delete_content(file_id, files_dir).await?;
     sqlx::query("DELETE FROM files WHERE file_id = $1")
         .bind(file_id)
         .execute(db)
@@ -54,14 +54,12 @@ async fn delete_content(file_id: &str, files_dir: &Path) -> Result<(), std::io::
 }
 
 async fn wait_for_file_expiry(receiver: &Receiver<()>, db: &PgPool) {
-    let mut rows = sqlx::query("SELECT MIN(valid_till) as min from files").fetch(db);
-    let row = rows
-        .try_next()
-        .await
-        .expect("could not fetch expiring files from database")
-        .expect("postgres min did not return any row");
-    let valid_till: Option<NaiveDateTime> = row.get("min");
-    let next_timeout = match valid_till {
+    let valid_till: (Option<NaiveDateTime>,) =
+        sqlx::query_as("SELECT MIN(valid_till) as min from files")
+            .fetch_one(db)
+            .await
+            .expect("could not fetch expiring files from database");
+    let next_timeout = match valid_till.0 {
         Some(valid_till) => valid_till.signed_duration_since(Local::now().naive_local()),
         None => Duration::days(1),
     };

src/download.rs

@@ -1,3 +1,5 @@
+use std::str::FromStr;
+
 use actix_files::NamedFile;
 use actix_web::{
     error,
@@ -5,17 +7,17 @@ use actix_web::{
     web, Error, HttpRequest, HttpResponse,
 };
 use async_std::{fs, path::Path};
-use futures::TryStreamExt;
 use mime::Mime;
-use sqlx::{
-    postgres::{PgPool, PgRow},
-    Row,
-};
+use sqlx::postgres::PgPool;
+use url::Url;
 
 use crate::deleter;
 use crate::{config::Config, file_kind::FileKind};
 
-const VIEW_HTML: &str = include_str!("../template/view.html");
+const TEXT_VIEW_HTML: &str = include_str!("../template/text-view.html");
+const URL_VIEW_HTML: &str = include_str!("../template/url-view.html");
+
+const TEXT_VIEW_SIZE_LIMIT: u64 = 512 * 1024; // 512KiB
 
 pub async fn download(
     req: HttpRequest,
@@ -23,73 +25,113 @@ pub async fn download(
     config: web::Data<Config>,
 ) -> Result<HttpResponse, Error> {
     let id = req.match_info().query("id");
-    let mut rows = sqlx::query(
-        "SELECT file_id, file_name, kind, delete_on_download from files WHERE file_id = $1",
-    )
-    .bind(id)
-    .fetch(db.as_ref());
-    let row: PgRow = rows
-        .try_next()
-        .await
-        .map_err(|_| error::ErrorInternalServerError("could not run select statement"))?
-        .ok_or_else(|| error::ErrorNotFound("file does not exist or has expired"))?;
-
-    let file_id: String = row.get("file_id");
-    let file_name: String = row.get("file_name");
-    let file_kind: String = row.get("kind");
-    let delete_on_download: bool = row.get("delete_on_download");
+    let (file_id, file_name, file_kind, delete_on_download) = load_file_info(id, &db).await?;
     let mut path = config.files_dir.clone();
     path.push(&file_id);
 
     let download = delete_on_download || req.query_string().contains("dl");
-    let (content_type, mut content_disposition) = get_content_types(&path, &file_name);
-    let is_text = file_kind == FileKind::Text.to_string() || content_type.type_() == mime::TEXT;
-    let response = if is_text && !download {
-        let content = fs::read_to_string(path).await.map_err(|_| {
-            error::ErrorInternalServerError("this file should be here but could not be found")
-        })?;
-        let encoded = htmlescape::encode_minimal(&content);
-        let view_html = VIEW_HTML.replace("{text}", &encoded);
-        let response = HttpResponse::Ok().content_type("text/html").body(view_html);
-        Ok(response)
+    let content_type = get_content_type(&path);
+    let response = if use_text_view(&file_kind, &content_type, &path, download).await {
+        build_text_response(&path).await
     } else {
-        if download {
-            content_disposition.disposition = DispositionType::Attachment;
-        }
-        let file = NamedFile::open(path)
-            .map_err(|_| {
-                error::ErrorInternalServerError("this file should be here but could not be found")
-            })?
-            .set_content_type(content_type)
-            .set_content_disposition(content_disposition);
-        file.into_response(&req)
+        build_file_response(download, &file_name, path, content_type, req)
     };
     if delete_on_download {
         deleter::delete_by_id(&db, &file_id, &config.files_dir)
             .await
-            .map_err(|_| error::ErrorInternalServerError("could not delete file"))?;
+            .map_err(|db_err| {
+                log::error!("could not delete file {:?}", db_err);
+                error::ErrorInternalServerError("could not delete file")
+            })?;
     }
     response
 }
 
-fn get_content_types(path: &Path, filename: &str) -> (Mime, ContentDisposition) {
+async fn load_file_info(
+    id: &str,
+    db: &web::Data<sqlx::Pool<sqlx::Postgres>>,
+) -> Result<(String, String, String, bool), Error> {
+    sqlx::query_as(
+        "SELECT file_id, file_name, kind, delete_on_download from files WHERE file_id = $1",
+    )
+    .bind(id)
+    .fetch_optional(db.as_ref())
+    .await
+    .map_err(|db_err| {
+        log::error!("could not run select statement {:?}", db_err);
+        error::ErrorInternalServerError("could not run select statement")
+    })?
+    .ok_or_else(|| error::ErrorNotFound("file does not exist or has expired"))
+}
+
+fn get_content_type(path: &Path) -> Mime {
     let std_path = std::path::Path::new(path.as_os_str());
-    let ct = tree_magic_mini::from_filepath(std_path)
+    tree_magic_mini::from_filepath(std_path)
         .unwrap_or("application/octet-stream")
         .parse::<Mime>()
-        .expect("tree_magic_mini should not produce invalid mime");
+        .expect("tree_magic_mini should not produce invalid mime")
+}
 
-    let disposition = match ct.type_() {
-        mime::IMAGE | mime::TEXT | mime::AUDIO | mime::VIDEO => DispositionType::Inline,
-        _ => DispositionType::Attachment,
+async fn use_text_view(
+    file_kind: &str,
+    content_type: &Mime,
+    file_path: &Path,
+    download: bool,
+) -> bool {
+    let is_text =
+        FileKind::from_str(file_kind) == Ok(FileKind::Text) || content_type.type_() == mime::TEXT;
+    let is_not_large = get_file_size(file_path).await < TEXT_VIEW_SIZE_LIMIT;
+    is_text && is_not_large && !download
+}
+
+async fn get_file_size(file_path: &Path) -> u64 {
+    fs::metadata(file_path)
+        .await
+        .map(|metadata| metadata.len())
+        .unwrap_or(0)
+}
+
+async fn build_text_response(path: &Path) -> Result<HttpResponse, Error> {
+    let content = fs::read_to_string(path).await.map_err(|file_err| {
+        log::error!("file could not be read {:?}", file_err);
+        error::ErrorInternalServerError("this file should be here but could not be found")
+    })?;
+    let encoded = htmlescape::encode_minimal(&content);
+    let html = if !content.contains(&['\n', '\r'][..]) && Url::from_str(&content).is_ok() {
+        let attribute_encoded = htmlescape::encode_attribute(&content);
+        URL_VIEW_HTML
+            .replace("{link_content}", &encoded)
+            .replace("{link_attribute}", &attribute_encoded)
+    } else {
+        TEXT_VIEW_HTML.replace("{text}", &encoded)
     };
+    let response = HttpResponse::Ok().content_type("text/html").body(html);
+    Ok(response)
+}
 
-    let cd = ContentDisposition {
-        disposition,
-        parameters: get_disposition_params(filename),
+fn build_file_response(
+    download: bool,
+    file_name: &str,
+    path: async_std::path::PathBuf,
+    content_type: Mime,
+    req: HttpRequest,
+) -> Result<HttpResponse, Error> {
+    let content_disposition = ContentDisposition {
+        disposition: if download {
+            DispositionType::Attachment
+        } else {
+            DispositionType::Inline
+        },
+        parameters: get_disposition_params(file_name),
     };
-
-    (ct, cd)
+    let file = NamedFile::open(path)
+        .map_err(|file_err| {
+            log::error!("file could not be read {:?}", file_err);
+            error::ErrorInternalServerError("this file should be here but could not be found")
+        })?
+        .set_content_type(content_type)
+        .set_content_disposition(content_disposition);
+    file.into_response(&req)
 }
 
 fn get_disposition_params(filename: &str) -> Vec<DispositionParam> {

src/main.rs

@@ -7,7 +7,7 @@ mod multipart;
 mod upload;
 
 use actix_files::Files;
-use actix_web::{middleware, web, App, Error, HttpResponse, HttpServer};
+use actix_web::{middleware::Logger, web, App, Error, HttpResponse, HttpServer};
 use async_std::{channel, task};
 use env_logger::Env;
 use sqlx::postgres::PgPool;
@@ -29,20 +29,20 @@ async fn main() -> std::io::Result<()> {
 
     log::info!("omnomnom");
 
-    task::spawn(deleter::delete_old_files(
-        receiver,
-        pool.clone(),
-        config.files_dir.clone(),
-    ));
-
-    let db = web::Data::new(pool);
+    let db = web::Data::new(pool.clone());
     let expiry_watch_sender = web::Data::new(sender);
     let bind_address = env::var("BIND_ADDRESS").unwrap_or_else(|_| "0.0.0.0:8000".to_owned());
 
+    task::spawn(deleter::delete_old_files(
+        receiver,
+        pool,
+        config.files_dir.clone(),
+    ));
+
     HttpServer::new({
         move || {
             App::new()
-                .wrap(middleware::Logger::new(r#"%{r}a "%r" =%s %bbytes %Tsec"#))
+                .wrap(Logger::new(r#"%{r}a "%r" =%s %bbytes %Tsec"#))
                 .app_data(db.clone())
                 .app_data(expiry_watch_sender.clone())
                 .data(config.clone())
@@ -52,6 +52,9 @@ async fn main() -> std::io::Result<()> {
                     web::resource(["/upload/{id}", "/upload/{id}/{name}"])
                         .route(web::get().to(upload::uploaded)),
                 )
+                .service(
+                    web::resource("/assets/auth-hide.js").route(web::get().to(upload::auth_hide)),
+                )
                 .service(Files::new("/static", "static").disable_content_disposition())
                 .service(
                     web::resource([

src/multipart.rs

@@ -1,10 +1,13 @@
-use crate::file_kind::FileKind;
+use crate::{config, file_kind::FileKind};
 use actix_multipart::{Field, Multipart};
-use actix_web::{error, http::header::DispositionParam};
-use async_std::{fs, fs::File, path::Path, prelude::*};
+use actix_web::{error, http::header::DispositionParam, Error};
+use async_std::{fs::File, path::Path, prelude::*};
 use chrono::{prelude::*, Duration};
 use futures::{StreamExt, TryStreamExt};
 
+const MAX_UPLOAD_SECONDS: u64 = 31 * 24 * 60 * 60;
+const DEFAULT_UPLOAD_SECONDS: u64 = 30 * 60;
+
 pub(crate) struct UploadConfig {
     pub original_name: String,
     pub valid_till: DateTime<Local>,
@@ -15,13 +18,15 @@ pub(crate) struct UploadConfig {
 pub(crate) async fn parse_multipart(
     mut payload: Multipart,
     file_id: &str,
-    filename: &Path,
-    max_size: Option<u64>,
+    file_name: &Path,
+    config: &config::Config,
 ) -> Result<UploadConfig, error::Error> {
     let mut original_name: Option<String> = None;
     let mut keep_for: Option<String> = None;
     let mut kind: Option<FileKind> = None;
     let mut delete_on_download = false;
+    let mut password = None;
+    let mut size = 0;
 
     while let Ok(Some(field)) = payload.try_next().await {
         let name = get_field_name(&field)?;
@@ -37,10 +42,7 @@ pub(crate) async fn parse_multipart(
                 }
                 original_name = file_original_name;
                 kind = Some(FileKind::Binary);
-                let mut file = fs::File::create(&filename)
-                    .await
-                    .map_err(|_| error::ErrorInternalServerError("could not create file"))?;
-                write_to_file(&mut file, field, max_size).await?;
+                size = create_file(file_name, field, config.max_file_size).await?;
             }
             "text" => {
                 if original_name.is_some() {
@@ -48,13 +50,13 @@ pub(crate) async fn parse_multipart(
                 }
                 original_name = Some(format!("{}.txt", file_id));
                 kind = Some(FileKind::Text);
-                let mut file = fs::File::create(&filename)
-                    .await
-                    .map_err(|_| error::ErrorInternalServerError("could not create file"))?;
-                write_to_file(&mut file, field, max_size).await?;
+                size = create_file(file_name, field, config.max_file_size).await?;
             }
             "delete_on_download" => {
-                delete_on_download = dbg!(parse_string(name, field).await?) != "false";
+                delete_on_download = parse_string(name, field).await? != "false";
+            }
+            "password" => {
+                password = Some(parse_string(name, field).await?);
             }
             _ => {}
         };
@@ -66,21 +68,24 @@ pub(crate) async fn parse_multipart(
     if original_name.len() > 255 {
         return Err(error::ErrorBadRequest("filename is too long"));
     }
-    let valid_till = if let Some(keep_for) = keep_for {
-        let keep_for = keep_for.parse().map_err(|e| {
+    let validated_keep_for: u64 = if let Some(keep_for) = keep_for {
+        let seconds = keep_for.parse().map_err(|e| {
             error::ErrorBadRequest(format!("field keep_for is not a number: {}", e))
         })?;
-        let max_keep_for = Duration::days(31).num_seconds();
-        if keep_for > max_keep_for {
+        if seconds > MAX_UPLOAD_SECONDS {
             return Err(error::ErrorBadRequest(format!(
                 "maximum allowed validity is {} seconds, but you specified {} seconds",
-                max_keep_for, keep_for
+                MAX_UPLOAD_SECONDS, seconds
             )));
         }
-        Local::now() + Duration::seconds(keep_for)
+        seconds
     } else {
-        Local::now() + Duration::seconds(1800)
+        DEFAULT_UPLOAD_SECONDS
     };
+    let valid_duration = Duration::seconds(validated_keep_for as i64);
+    let valid_till = Local::now() + valid_duration;
+
+    check_auth_requirements(size, valid_duration, password, config)?;
 
     Ok(UploadConfig {
         original_name,
@@ -90,6 +95,25 @@ pub(crate) async fn parse_multipart(
     })
 }
 
+fn check_auth_requirements(
+    size: u64,
+    validated_keep_for: Duration,
+    password: Option<String>,
+    config: &config::Config,
+) -> Result<(), error::Error> {
+    if let Some(no_auth_limits) = &config.no_auth_limits {
+        let requires_auth = validated_keep_for > no_auth_limits.max_time
+            || validated_keep_for > no_auth_limits.large_file_max_time
+                && size > no_auth_limits.large_file_size;
+        if requires_auth && password.as_ref() != Some(&no_auth_limits.auth_password) {
+            return Err(error::ErrorBadRequest(
+                "upload requires authentication, but authentication was incorrect",
+            ));
+        }
+    }
+    Ok(())
+}
+
 fn get_field_name(field: &Field) -> Result<String, error::Error> {
     Ok(field
         .content_disposition()
@@ -113,16 +137,29 @@ async fn read_content(mut field: actix_multipart::Field) -> Result<Vec<u8>, erro
     Ok(data)
 }
 
+async fn create_file(
+    filename: &Path,
+    field: Field,
+    max_file_size: Option<u64>,
+) -> Result<u64, Error> {
+    let mut file = File::create(&filename).await.map_err(|file_err| {
+        log::error!("could not create file {:?}", file_err);
+        error::ErrorInternalServerError("could not create file")
+    })?;
+    let written_bytes = write_to_file(&mut file, field, max_file_size).await?;
+    Ok(written_bytes)
+}
+
 async fn write_to_file(
     file: &mut File,
-    mut field: actix_multipart::Field,
+    mut field: Field,
     max_size: Option<u64>,
-) -> Result<(), error::Error> {
+) -> Result<u64, error::Error> {
     let mut written_bytes: u64 = 0;
     while let Some(chunk) = field.next().await {
         let chunk = chunk.map_err(error::ErrorBadRequest)?;
+        written_bytes += chunk.len() as u64;
         if let Some(max_size) = max_size {
-            written_bytes += chunk.len() as u64;
             if written_bytes > max_size {
                 return Err(error::ErrorBadRequest(format!(
                     "exceeded maximum file size of {} bytes",
@@ -130,11 +167,12 @@ async fn write_to_file(
                 )));
             }
         }
-        file.write_all(chunk.as_ref())
-            .await
-            .map_err(|_| error::ErrorInternalServerError("could not write file"))?;
+        file.write_all(chunk.as_ref()).await.map_err(|write_err| {
+            log::error!("could not write file {:?}", write_err);
+            error::ErrorInternalServerError("could not write file")
+        })?;
     }
-    Ok(())
+    Ok(written_bytes)
 }
 
 fn get_original_filename(field: &actix_multipart::Field) -> Option<String> {

src/upload.rs

@@ -1,27 +1,143 @@
+use std::io::ErrorKind;
+use std::{cmp, vec};
+
 use crate::config::Config;
 use crate::file_kind::FileKind;
 use crate::multipart;
 use crate::multipart::UploadConfig;
 use actix_multipart::Multipart;
 use actix_web::{error, web, Error, HttpResponse};
-use async_std::{channel::Sender, fs};
+use async_std::{
+    channel::Sender,
+    fs::{self, OpenOptions},
+    path::PathBuf,
+};
+use chrono::Duration;
 use rand::prelude::SliceRandom;
 use sqlx::postgres::PgPool;
 
 const INDEX_HTML: &str = include_str!("../template/index.html");
+const AUTH_HIDE_JS: &str = include_str!("../template/auth-hide.js");
 const UPLOAD_HTML: &str = include_str!("../template/upload.html");
+const AUTH_SNIPPET_HTML: &str = include_str!("../snippet/auth.html.snippet");
+const MAX_SIZE_SNIPPET_HTML: &str = include_str!("../snippet/max_size.html.snippet");
 
 const ID_CHARS: &[char] = &[
     'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v',
     'w', 'x', 'y', 'z', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 ];
 
-pub async fn index(req: web::HttpRequest) -> Result<HttpResponse, Error> {
-    let upload_url = format!("{}/upload", get_host_url(&req));
-    let index_html = INDEX_HTML.replace("{upload_url}", upload_url.as_str());
+pub async fn index(
+    req: web::HttpRequest,
+    config: web::Data<Config>,
+) -> Result<HttpResponse, Error> {
+    let filled_index_html = fill_index_html(req, config);
     Ok(HttpResponse::Ok()
         .content_type("text/html")
-        .body(index_html))
+        .body(filled_index_html))
+}
+
+fn fill_index_html(req: web::HttpRequest, config: web::Data<Config>) -> String {
+    let upload_url = format!("{}/upload", get_host_url(&req));
+    let auth_snippet = config
+        .no_auth_limits
+        .as_ref()
+        .map_or("", |_| AUTH_SNIPPET_HTML);
+    let max_size_snippet = config
+        .max_file_size
+        .as_ref()
+        .map_or("", |_| MAX_SIZE_SNIPPET_HTML);
+    INDEX_HTML
+        .replace("{max_size_snippet}", max_size_snippet)
+        .replace(
+            "{max_size}",
+            &render_file_size(config.max_file_size.unwrap_or(0)),
+        )
+        .replace("{auth_snippet}", auth_snippet)
+        .replace(
+            "{auth_time}",
+            &config
+                .no_auth_limits
+                .as_ref()
+                .map(|limit| limit.max_time)
+                .map_or("".into(), render_duration),
+        )
+        .replace(
+            "{auth_large_time}",
+            &config
+                .no_auth_limits
+                .as_ref()
+                .map(|limit| limit.large_file_max_time)
+                .map_or("".into(), render_duration),
+        )
+        .replace(
+            "{auth_large_size}",
+            &config
+                .no_auth_limits
+                .as_ref()
+                .map(|limit| limit.large_file_size)
+                .map_or("".into(), render_file_size),
+        )
+        .replace("{upload_url}", upload_url.as_str())
+}
+
+fn render_file_size(size: u64) -> String {
+    let magnitude = cmp::min((size as f64).log(1024.0) as u32, 5);
+    let prefix = ["", "ki", "Mi", "Gi", "Ti", "Pi"][magnitude as usize];
+    let value = size / (1024_u64.pow(magnitude));
+    format!("{}{}B", value, prefix)
+}
+
+fn render_duration(duration: Duration) -> String {
+    let days = duration.num_days();
+    let hours = duration.num_hours() % 24;
+    let minutes = duration.num_minutes() % 60;
+    let seconds = duration.num_seconds() % 60;
+    let mut elements = vec![];
+    if let Some(name) = pluralize(days, "tag", "e") {
+        elements.push(name);
+    }
+    if let Some(name) = pluralize(hours, "stunde", "n") {
+        elements.push(name);
+    }
+    if let Some(name) = pluralize(minutes, "minute", "n") {
+        elements.push(name);
+    }
+    if let Some(name) = pluralize(seconds, "sekunde", "n") {
+        elements.push(name);
+    }
+    elements.join("+")
+}
+
+fn pluralize(number: i64, word: &str, suffix: &str) -> Option<String> {
+    match number {
+        0 => None,
+        1 => Some(format!("{} {}", number, word)),
+        _ => Some(format!("{} {}{}", number, word, suffix)),
+    }
+}
+
+pub async fn auth_hide(config: web::Data<Config>) -> Result<HttpResponse, Error> {
+    if let Some(no_auth_limits) = &config.no_auth_limits {
+        let auth_hide_js = AUTH_HIDE_JS
+            .replace(
+                "{no_auth_max_time}",
+                &no_auth_limits.max_time.num_seconds().to_string(),
+            )
+            .replace(
+                "{no_auth_large_file_max_time}",
+                &no_auth_limits.large_file_max_time.num_seconds().to_string(),
+            )
+            .replace(
+                "{no_auth_large_file_size}",
+                &no_auth_limits.large_file_size.to_string(),
+            );
+        Ok(HttpResponse::Ok()
+            .content_type("application/javascript")
+            .body(auth_hide_js))
+    } else {
+        Err(error::ErrorNotFound("file not found"))
+    }
 }
 
 pub async fn upload(
@@ -31,12 +147,12 @@ pub async fn upload(
     expiry_watch_sender: web::Data<Sender<()>>,
     config: web::Data<Config>,
 ) -> Result<HttpResponse, Error> {
-    let file_id = gen_file_id();
-    let mut filename = config.files_dir.clone();
-    filename.push(&file_id);
+    let (file_id, file_name) = create_unique_file(&config).await.map_err(|file_err| {
+        log::error!("could not create file {:?}", file_err);
+        error::ErrorInternalServerError("could not create file")
+    })?;
 
-    let parsed_multipart =
-        multipart::parse_multipart(payload, &file_id, &filename, config.max_file_size).await;
+    let parsed_multipart = multipart::parse_multipart(payload, &file_id, &file_name, &config).await;
     let UploadConfig {
         original_name,
         valid_till,
@@ -45,8 +161,9 @@ pub async fn upload(
     } = match parsed_multipart {
         Ok(data) => data,
         Err(err) => {
-            if filename.exists().await {
-                fs::remove_file(filename).await.map_err(|_| {
+            if file_name.exists().await {
+                fs::remove_file(file_name).await.map_err(|file_err| {
+                    log::error!("could not remove file {:?}", file_err);
                     error::ErrorInternalServerError(
                         "could not parse multipart; could not remove file",
                     )
@@ -67,8 +184,10 @@ pub async fn upload(
     .bind(delete_on_download)
     .execute(db.as_ref())
     .await;
-    if db_insert.is_err() {
-        fs::remove_file(filename).await.map_err(|_| {
+    if let Err(db_err) = db_insert {
+        log::error!("could not insert into datebase {:?}", db_err);
+        fs::remove_file(file_name).await.map_err(|file_err| {
+            log::error!("could not remove file {:?}", file_err);
             error::ErrorInternalServerError(
                 "could not insert file into database; could not remove file",
             )
@@ -102,6 +221,26 @@ pub async fn upload(
         .body(format!("{}\n", url)))
 }
 
+async fn create_unique_file(
+    config: &web::Data<Config>,
+) -> Result<(String, PathBuf), std::io::Error> {
+    loop {
+        let file_id = gen_file_id();
+        let mut file_name = config.files_dir.clone();
+        file_name.push(&file_id);
+        match OpenOptions::new()
+            .write(true)
+            .create_new(true)
+            .open(&file_name)
+            .await
+        {
+            Ok(_) => return Ok((file_id, file_name)),
+            Err(error) if error.kind() == ErrorKind::AlreadyExists => continue,
+            Err(error) => return Err(error),
+        }
+    }
+}
+
 fn gen_file_id() -> String {
     let mut rng = rand::thread_rng();
     let mut id = String::with_capacity(5);

static/index.css

@@ -1,16 +1,36 @@
 :root {
   --bg: #222222;
+  --bg-alt: #444444;
+  --accent: #007600;
+  --accent-alt: #228b22;
   --fg: #e9e9e9;
+  --fg-light: #b6b6b6;
+  --radius: 5px;
+}
+
+html {
+  box-sizing: border-box;
+}
+
+*,
+*::before,
+*::after {
+  box-sizing: inherit;
 }
 
 body {
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
   background-color: var(--bg);
+  min-height: 100vh;
   margin: 0;
 }
 
 main {
   color: var(--fg);
   font-family: sans;
+  width: 100%;
   max-width: 1200px;
   margin: 0 auto;
   padding: 1rem;
@@ -44,21 +64,44 @@ textarea,
   color: var(--fg);
   padding: 0.5rem;
   border: 2px solid var(--fg);
-  border-radius: 5px;
+  border-radius: var(--radius);
   margin-bottom: 1rem;
-  max-width: calc(100vw - 3rem - 4px);
+  max-width: calc(100vw - 2rem);
 }
 
-*.hidden {
+details {
+  display: inline;
+}
+
+input:focus-within,
+select:focus-within,
+textarea:focus-within,
+.button:focus-within,
+details:focus-within,
+a:focus-within {
+  outline: solid cornflowerblue 2px;
+  border-radius: var(--radius);
+}
+
+textarea {
+  height: 30vh;
+}
+
+.hidden {
   display: none;
 }
 
-input[type="checkbox"] {
+input[type='checkbox'] {
   margin-bottom: 1.5rem;
 }
 
 .button {
   cursor: pointer;
+  font-family: sans;
+  font-weight: normal;
+  font-size: 1rem;
+  margin-right: 0.5rem;
+  user-select: none;
 }
 
 a.button {
@@ -70,18 +113,50 @@ a.button:visited {
 }
 
 .button:hover {
-  background-color: #444444;
+  background-color: var(--bg-alt);
 }
 
 .button.main {
-  background-color: #007600;
+  background-color: var(--accent);
 }
 
 .button.main:hover {
-  background-color: forestgreen;
+  background-color: var(--accent-alt);
 }
 
 .usage {
   margin-top: 2em;
   overflow: auto;
 }
+
+.large-link {
+  display: inline-block;
+  margin-bottom: 1em;
+  max-height: 60vh;
+  overflow-y: auto;
+
+  font-size: clamp(1rem, 3vw, 1.5rem);
+  overflow-wrap: anywhere;
+}
+
+footer {
+  font-family: sans;
+  flex-shrink: 0;
+  display: flex;
+  justify-content: flex-end;
+  padding: 0.5rem;
+}
+
+.repo {
+  padding: 0.5rem;
+  color: var(--fg-light);
+  text-decoration: none;
+}
+
+.repo:visited {
+  color: var(--fg-light);
+}
+
+.repo:hover {
+  color: var(--fg);
+}

template/auth-hide.js

@@ -0,0 +1,38 @@
+const fileUpload = document.getElementById("file-upload");
+const textUpload = document.getElementById("text-upload");
+const keepFor = document.getElementById("keep_for");
+const passwordInput = document.getElementById("password-input");
+
+const maxTime = Number("{no_auth_max_time}");
+const largeFileMaxTime = Number("{no_auth_large_file_max_time}");
+const largeFileSize = Number("{no_auth_large_file_size}");
+
+let keep = Number(keepFor.value);
+let size = fileUpload.files[0]
+  ? fileUpload.files[0].size
+  : textUpload.value.length;
+
+const updatePasswordInput = () => {
+  const requirePassword = keep > maxTime || (size > largeFileSize && keep > largeFileMaxTime);
+  passwordInput.className = requirePassword ? "" : "hidden";
+};
+
+updatePasswordInput();
+
+fileUpload.addEventListener("change", () => {
+  size = fileUpload.files[0]
+    ? fileUpload.files[0].size
+    : textUpload.value.length;
+  updatePasswordInput();
+});
+textUpload.addEventListener("input", () => {
+  if (!fileUpload.files[0]) {
+    size = textUpload.value.length;
+    updatePasswordInput();
+  }
+});
+keepFor.addEventListener("change", () => {
+  keep = Number(keepFor.value);
+  updatePasswordInput();
+});
+

template/index.html

@@ -11,13 +11,13 @@
     <main>
       <h1>datatrash</h1>
       <form action="/upload" method="POST" enctype="multipart/form-data">
-        <label for="file-upload">datei</label>
+        <label for="file-upload">datei{max_size_snippet}</label>
         <br />
         <input id="file-upload" type="file" name="file" />
         <br />
         <label for="text-upload">oder asciitrash</label>
         <br />
-        <textarea id="text-upload" name="text" rows="20" cols="120"></textarea>
+        <textarea id="text-upload" name="text" cols="120"></textarea>
         <br />
         <label for="keep_for">gültig für</label>
         <select id="keep_for" name="keep_for">
@@ -35,21 +35,38 @@
           name="delete_on_download"
         />
         <label for="delete_on_download">nach einem download löschen</label>
-        <br />
+        <br />{auth_snippet}
         <input class="main button" type="submit" value="hochladen" />
       </form>
-      <section class="usage">
+      <details class="usage">
+        <summary>nutzung als api</summary>
         <pre>
-file upload
+datei hochladen
   curl -F 'file=@yourfile.rs' {upload_url}
-text upload
+
+text hochladen
   curl -F 'text=your text' {upload_url}
-including time
+
+zeitbegrenzung setzen
   curl -F 'text=your text' -F 'keep_for=1800' {upload_url}
-limit to one download
-  curl -F 'text=your text' -F 'delete_on_download=true' {upload_url}</pre
+
+nach einem download löschen
+  curl -F 'text=your text' -F 'delete_on_download=true' {upload_url}
+
+authentifizieren
+  curl -F 'text=your text' -F 'password=…' {upload_url}</pre
         >
-      </section>
+      </details>
     </main>
+    <footer>
+      <a
+        class="repo"
+        href="https://repos.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
   </body>
 </html>

template/text-view.html

@@ -16,6 +16,16 @@
       <a class="main button" href="?dl">herunterladen</a>
       <button id="copy" class="button hidden">text kopieren</button>
     </main>
+    <footer>
+      <a
+        class="repo"
+        href="https://repos.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
     <script src="/static/copy.js" lang="javascript"></script>
   </body>
 </html>

template/upload.html

@@ -15,6 +15,16 @@
       </p>
       <button id="copy" class="main button hidden">link kopieren</button>
     </main>
+    <footer>
+      <a
+        class="repo"
+        href="https://repos.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
     <script src="/static/copy.js" lang="javascript"></script>
   </body>
 </html>

template/url-view.html

@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html lang="de-DE">
+  <head>
+    <title>datatrash</title>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link href="/static/index.css" rel="stylesheet" />
+  </head>
+  <body>
+    <main>
+      <h1><a href="/">datatrash</a></h1>
+      <a
+        class="large-link copy-content"
+        href="{link_attribute}"
+        rel="noopener noreferrer"
+        >{link_content}</a
+      >
+      <br />
+      <a class="main button" href="{link_attribute}" rel="noopener noreferrer">
+        link öffnen
+      </a>
+      <button id="copy" class="button hidden">link kopieren</button>
+      <a class="button" href="?dl">als text herunterladen</a>
+    </main>
+    <footer>
+      <a
+        class="repo"
+        href="https://repos.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
+    <script src="/static/copy.js" lang="javascript"></script>
+  </body>
+</html>