65 lines
1.8 KiB
Rust
65 lines
1.8 KiB
Rust
use std::path::Path;
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use mitra_utils::files::sniff_media_type;
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use crate::media::{save_file, SUPPORTED_MEDIA_TYPES};
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use super::errors::MastodonError;
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pub const UPLOAD_MAX_SIZE: usize = 1024 * 1024 * 5;
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#[derive(thiserror::Error, Debug)]
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pub enum UploadError {
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#[error(transparent)]
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WriteError(#[from] std::io::Error),
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#[error("base64 decoding error")]
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Base64DecodingError(#[from] base64::DecodeError),
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#[error("file is too large")]
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TooLarge,
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#[error("invalid media type")]
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InvalidMediaType,
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}
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impl From<UploadError> for MastodonError {
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fn from(error: UploadError) -> Self {
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match error {
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UploadError::WriteError(_) => MastodonError::InternalError,
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other_error => {
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MastodonError::ValidationError(other_error.to_string())
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},
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}
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}
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}
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pub fn save_b64_file(
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b64data: &str,
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maybe_media_type: Option<String>,
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output_dir: &Path,
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maybe_expected_prefix: Option<&str>,
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) -> Result<(String, usize, String), UploadError> {
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let file_data = base64::decode(b64data)?;
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let file_size = file_data.len();
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if file_size > UPLOAD_MAX_SIZE {
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return Err(UploadError::TooLarge);
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};
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// Sniff media type if not provided
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let media_type = maybe_media_type.or(sniff_media_type(&file_data))
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.ok_or(UploadError::InvalidMediaType)?;
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if !SUPPORTED_MEDIA_TYPES.contains(&media_type.as_str()) {
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return Err(UploadError::InvalidMediaType);
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};
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if let Some(expected_prefix) = maybe_expected_prefix {
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if !media_type.starts_with(expected_prefix) {
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return Err(UploadError::InvalidMediaType);
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};
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};
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let file_name = save_file(
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file_data,
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output_dir,
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Some(&media_type),
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)?;
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Ok((file_name, file_size, media_type))
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}
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