Fixes WASM build

lib/src/sparql/http/dummy.rs

@@ -3,6 +3,7 @@
 use crate::error::invalid_input_error;
 use http::{Request, Response};
 use std::io;
+use std::io::BufRead;
 
 pub struct Client {}
 
@@ -11,7 +12,10 @@ impl Client {
         Self {}
     }
 
-    pub fn request(&self, _request: &Request<Option<Vec<u8>>>) -> io::Result<Response<Vec<u8>>> {
+    pub fn request(
+        &self,
+        _request: &Request<Option<Vec<u8>>>,
+    ) -> io::Result<Response<Box<dyn BufRead>>> {
         Err(invalid_input_error(
             "HTTP client is not available. Enable the feature 'simple_http'",
         ))

lib/src/sparql/mod.rs

@@ -33,9 +33,7 @@ pub use crate::sparql::parser::{Query, Update};
 use crate::sparql::plan::{PlanNode, TripleTemplate};
 use crate::sparql::plan_builder::PlanBuilder;
 pub use crate::sparql::service::ServiceHandler;
-use crate::sparql::service::{
+use crate::sparql::service::{EmptyServiceHandler, ErrorConversionServiceHandler};
-    EmptyServiceHandler, ErrorConversionServiceHandler, SimpleServiceHandler,
-};
 use crate::sparql::update::SimpleUpdateEvaluator;
 use crate::store::numeric_encoder::{StrContainer, StrEncodingAware};
 use crate::store::{ReadableEncodedStore, StoreOrParseError, WritableEncodedStore};
@@ -231,7 +229,7 @@ impl QueryOptions {
     #[inline]
     #[cfg(feature = "http_client")]
     pub fn with_simple_service_handler(mut self) -> Self {
-        self.service_handler = Rc::new(SimpleServiceHandler::new());
+        self.service_handler = Rc::new(service::SimpleServiceHandler::new());
         self
     }
 

lib/src/sparql/service.rs

@@ -97,6 +97,7 @@ pub struct SimpleServiceHandler {
 }
 
 impl SimpleServiceHandler {
+    #[allow(dead_code)]
     pub fn new() -> Self {
         Self {
             client: Client::new(),