Struct Db 

pub struct Db { /* private fields */ }

Internal database for MIME type lookups.

This struct manages the hash maps used for fast MIME type lookups by file extension and content type.

Implementations

impl Db

pub fn new() -> Result<Self, Box<dyn Error>>

Creates a new database instance and loads the embedded data files.

pub fn lookup_by_extension(&self, extension: &str) -> Option<&Info>

Looks up MIME information by file extension.

The lookup is case-insensitive, trying the exact extension first, then falling back to lowercase.

Arguments

• extension - File extension (with or without leading dot)

Returns

• Some(&Info) if the extension is found
• None if the extension is not recognized

pub fn lookup_by_content_type(&self, content_type: &str) -> Option<&Info>

Looks up MIME information by content type.

Arguments

• content_type - MIME content type (e.g., “text/plain”)

Returns

• Some(&Info) if the content type is found
• None if the content type is not recognized

pub fn lookup_by_filename(&self, filename: &str) -> Option<&Info>

Looks up MIME information by filename.

Extracts the file extension from the filename and performs a lookup. The lookup is case-insensitive.

Arguments

• filename - Full filename or path

Returns

• Some(&Info) if the file extension is recognized
• None if the file has no extension or the extension is not recognized