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use crate::config::CONFIG;
use crate::errors::AppError;
use axum::{
extract::{Multipart, Path},
http::header::{HeaderMap, HeaderName, HeaderValue},
};
use std::fs;
use rand::random;
/// Upload a file. Returns an `AppError` or the path of the uploaded file.
/// If `filename` param has a value choose it as filename
pub async fn upload(
mut multipart: Multipart,
allowed_extensions: Vec<&str>,
filename: Option<String>,
) -> Result<String, AppError> {
let mut uploaded_file = String::new();
if let Some(file) = multipart.next_field().await.unwrap() {
let content_type = file.content_type().unwrap().to_string();
let index = content_type.find('/').unwrap_or(usize::max_value());
let mut ext_name = "xxx";
if index != usize::max_value() {
ext_name = &content_type[index + 1..];
}
if allowed_extensions
.iter()
.any(|&x| x.to_lowercase() == ext_name)
{
let name = match filename {
Some(name) => name,
None => (random::<f32>() * 1000000000 as f32).to_string(),
};
let save_filename = format!("{}/{}.{}", CONFIG.save_file_base_path, name, ext_name);
uploaded_file = format!("{}/{}.{}", CONFIG.uploads_endpoint, name, ext_name);
let data = file.bytes().await.unwrap();
tokio::fs::write(&save_filename, &data)
.await
.map_err(|err| err.to_string())?;
}
}
if !uploaded_file.is_empty() {
return Ok(uploaded_file);
}
Err(AppError::BadRequest(
"File extension not supported".to_string(),
))
}
/// Axum endpoint which shows uploaded file
pub async fn show_uploads(Path(id): Path<String>) -> (HeaderMap, Vec<u8>) {
let index = id.find('.').unwrap_or(usize::max_value());
let mut ext_name = "xxx";
if index != usize::max_value() {
ext_name = &id[index + 1..];
}
let mut headers = HeaderMap::new();
if vec!["jpg", "jpeg", "png", "gif", "webp"]
.iter()
.any(|&x| x == ext_name)
{
let content_type = format!("image/{}", ext_name);
headers.insert(
HeaderName::from_static("content-type"),
HeaderValue::from_str(&content_type).unwrap(),
);
}
let file_name = format!("{}/{}", CONFIG.save_file_base_path, id);
(headers, fs::read(&file_name).unwrap())
}
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