46 lines
1.2 KiB
Rust
46 lines
1.2 KiB
Rust
use std::fs::{set_permissions, File, Permissions};
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use std::io::prelude::*;
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use std::io::Error;
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use std::os::unix::fs::PermissionsExt;
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use std::path::Path;
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use mime_guess::get_mime_extensions_str;
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use mime_sniffer::MimeTypeSniffer;
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pub fn sniff_media_type(data: &[u8]) -> Option<String> {
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data.sniff_mime_type().map(|val| val.to_string())
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}
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pub fn get_media_type_extension(media_type: &str) -> Option<&'static str> {
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match media_type {
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// Override extension provided by mime_guess
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"image/jpeg" => Some("jpg"),
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_ => get_mime_extensions_str(media_type)
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.and_then(|extensions| extensions.first())
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.copied(),
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}
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}
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pub fn write_file(data: &[u8], file_path: &Path) -> Result<(), Error> {
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let mut file = File::create(file_path)?;
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file.write_all(data)?;
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Ok(())
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}
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pub fn set_file_permissions(file_path: &Path, mode: u32) -> Result<(), Error> {
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let permissions = Permissions::from_mode(mode);
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set_permissions(file_path, permissions)?;
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Ok(())
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_get_media_type_extension() {
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assert_eq!(get_media_type_extension("image/png"), Some("png"),);
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assert_eq!(get_media_type_extension("image/jpeg"), Some("jpg"),);
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}
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}
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