Struct icu_provider_blob::BlobDataProvider

pub struct BlobDataProvider { /* private fields */ }

A data provider loading data from blobs dynamically created at runtime.

This enables data blobs to be read from the filesystem or from an HTTP request dynamically at runtime, so that the code and data can be shipped separately.

If you prefer to bake the data into your binary, see StaticDataProvider.

Examples

use icu_locid::locale;
use icu_provider::prelude::*;
use icu_provider::hello_world::*;
use icu_provider_blob::BlobDataProvider;
use std::fs;

// Read an ICU4X data blob dynamically:
let blob = fs::read(concat!(
    env!("CARGO_MANIFEST_DIR"),
    "/tests/data/hello_world.postcard",
)).expect("Reading pre-computed postcard buffer");

// Create a DataProvider from it:
let provider = BlobDataProvider::new_from_rc_blob(blob.into())
    .expect("Deserialization should succeed");

// Check that it works:
let response: DataPayload<HelloWorldV1Marker> = provider
    .load_resource(&DataRequest {
        options: locale!("la").into(),
        metadata: Default::default(),
    })
    .expect("Data should be valid")
    .take_payload()
    .expect("Data should be present");

assert_eq!(response.get().message, "Ave, munde");

Implementations

impl BlobDataProvider

pub fn new_from_rc_blob(blob: Rc<[u8]>) -> Result<Self, DataError>

Create a BlobDataProvider from an Rc blob of ICU4X data.

Trait Implementations

impl BufferProvider for BlobDataProvider

fn load_buffer(
    &self,
    key: ResourceKey,
    req: &DataRequest
) -> Result<DataResponse<BufferMarker>, DataError>

impl<M> DynProvider<M> for BlobDataProvider where
    M: DataMarker,
    for<'de> YokeTraitHack<<M::Yokeable as Yokeable<'de>>::Output>: Deserialize<'de>, 

fn load_payload(
    &self,
    key: ResourceKey,
    req: &DataRequest
) -> Result<DataResponse<M>, DataError>

Query the provider for data, returning the result.

impl<M> ResourceProvider<M> for BlobDataProvider where
    M: ResourceMarker,
    for<'de> YokeTraitHack<<M::Yokeable as Yokeable<'de>>::Output>: Deserialize<'de>, 

fn load_resource(&self, req: &DataRequest) -> Result<DataResponse<M>, DataError>

Query the provider for data, returning the result.