Struct HttpProvider 

pub struct HttpProvider { /* private fields */ }

Provider for data: { url: "..." } shapes. Issues a GET via reqwest (works on both native and WASM with no feature-flag branching).

Header handling:

• with_default_headers(...) sets defaults that apply to every request.
• FetchRequest.headers overrides any default with the same name on a per-request basis (matches HTTP intuition: per-call wins over default).

Decode rule:

• Content-Type: application/vnd.apache.arrow.* → decode as Arrow IPC bytes via DataTable::from_ipc_bytes.
• anything else → parse as JSON. JSON arrays of objects flow through DataTable::from_rows; JSON objects with a top-level array key (rows, data, or results) are unwrapped automatically to match the most common API conventions.

Implementations

impl HttpProvider

pub fn new() -> Self

New provider with no default headers. Convenience for the default register_provider("http", HttpProvider::new()) registration.

pub fn with_default_headers(self, headers: HashMap<String, String>) -> Self

Builder: attach default headers (e.g. Authorization, User-Agent) applied to every request unless overridden by FetchRequest.headers.

Trait Implementations

impl DataSourceProvider for HttpProvider

fn fetch<'life0, 'async_trait>( &'life0 self, request: FetchRequest, ) -> Pin<Box<dyn Future<Output = Result<FetchResult, FetchError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Fetch one source. The resolver handles caching + dedup + parallelism; providers only see this single call per actual upstream invocation.

fn shutdown<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Optional graceful shutdown hook. Called by ChartML::shutdown() on SSR request end / tab close. Default no-op so providers that hold no pooled resources don’t have to implement it.

impl Default for HttpProvider

fn default() -> Self

Returns the “default value” for a type.