# sqlite-vfs-http
The `sqlite-vfs-http` is a library based on the SQLite VFS extension, designed to access static SQLite files located on a CDN via HTTP/HTTPS protocol.
By using this library, you can host SQLite database files on a remote server and perform queries without downloading the files locally.
### Requirements
- any crate that link SQLite3 to your binary, such as `rusqlite`, `sqlx` or `libsqlite3-sys`
### Usage
1. add the following to your `Cargo.toml`:
```toml
[dependencies]
sqlite-vfs-http = "0.1.0"
```
2. use the library in your code:
```rust
use rusqlite::{Connection, NO_PARAMS};
use sqlite_vfs_http::{register_http_vfs, HTTP_VFS};
// Register the HTTP VFS for sqlite
register_http_vfs();
let base = "https://example.com";
let conn = Connection::open_with_flags_and_vfs(
format!("{base}/0.db"),
OpenFlags::SQLITE_OPEN_READ_WRITE
| OpenFlags::SQLITE_OPEN_CREATE
| OpenFlags::SQLITE_OPEN_NO_MUTEX,
// Use HTTP VFS
HTTP_VFS,
)?;
conn.query_row(
"SELECT count(1) FROM sqlite_master WHERE type = 'table'",
[], |row| row.get::<usize>(0)
).unwrap();
```
### Limitations
- Before uploading to the CDN, the database needs to change the journal mode to `MEMORY`:
```sql
PRAGMA journal_mode = MEMORY;
```
### License
> This project is licensed under the AGPL-3.0 license.