Struct GrpcWebLayer 

pub struct GrpcWebLayer;

Available on non-WebAssembly only.

Translates gRPC-web requests to gRPC for the layers after it — put it in front of a GrpcProxy:

use rust_web_server::app::App;
use rust_web_server::core::New;
use rust_web_server::proxy::{GrpcProxy, GrpcWebLayer};

let app = App::new()
    .wrap(GrpcWebLayer::new())
    .wrap(GrpcProxy::new(["grpc-service:50051"]));

Implementations

impl GrpcWebLayer

pub fn new() -> GrpcWebLayer

Available on crate feature http2 only.

Trait Implementations

impl Default for GrpcWebLayer

fn default() -> GrpcWebLayer

Returns the “default value” for a type.

impl Middleware for GrpcWebLayer

fn accepts_streamed_body( &self, _request: &Request, _connection: &ConnectionInfo, ) -> bool

The body passes through (decoded on the fly for -text).

fn handle( &self, request: &Request, connection: &ConnectionInfo, next: &dyn Application, ) -> Result<Response, String>

fn runs_inline(&self, _request: &Request, _connection: &ConnectionInfo) -> bool

true when this layer’s own work for request never blocks (in-memory state, atomics, short mutexes) — see Application::runs_inline. A WithMiddleware stack runs inline only if every layer and the inner application agree. Default false.

fn is_passthrough( &self, _request: &Request, _connection: &ConnectionInfo, ) -> bool

true when handle would do nothing for request but call next (e.g. a rate limit that isn’t configured). A WithMiddleware stack offers the inner application’s execute_async only if every layer passes the request through. Default false.

fn answers_streamed_body( &self, _request: &Request, _connection: &ConnectionInfo, ) -> bool

true when this layer answers request itself — it doesn’t call next — and reads its body as a stream (a proxy forwarding it as it arrives). The body is then streamed whatever the layers after it and the application would say. Requires accepts_streamed_body. Since 18.3.0.

fn layer_name(&self) -> &'static str

A short name for this layer, as tools that describe an app list it (Application::middleware_names): by default the type’s name without its module path or generic parameters (CacheLayer). Since 18.28.0.