WIP on get channel info for arch app

disk/src/raw/client.rs

@@ -0,0 +1,43 @@
+/*!
+Delivers event data.
+
+Delivers event data (not yet time-binned) from local storage and provides client functions
+to request such data from nodes.
+ */
+
+use crate::binned::EventsNodeProcessor;
+use crate::frame::inmem::InMemoryFrameAsyncReadStream;
+use crate::frame::makeframe::{make_frame, make_term_frame};
+use crate::raw::eventsfromframes::EventsFromFrames;
+use err::Error;
+use futures_core::Stream;
+use items::{FrameType, RangeCompletableItem, Sitemty, StreamItem};
+use netpod::query::RawEventsQuery;
+use netpod::{EventQueryJsonStringFrame, Node, PerfOpts};
+use std::pin::Pin;
+use tokio::io::AsyncWriteExt;
+use tokio::net::TcpStream;
+
+pub async fn x_processed_stream_from_node<ENP>(
+    query: RawEventsQuery,
+    perf_opts: PerfOpts,
+    node: Node,
+) -> Result<Pin<Box<dyn Stream<Item = Sitemty<<ENP as EventsNodeProcessor>::Output>> + Send>>, Error>
+where
+    ENP: EventsNodeProcessor,
+    <ENP as EventsNodeProcessor>::Output: Unpin + 'static,
+    Result<StreamItem<RangeCompletableItem<<ENP as EventsNodeProcessor>::Output>>, err::Error>: FrameType,
+{
+    let net = TcpStream::connect(format!("{}:{}", node.host, node.port_raw)).await?;
+    let qjs = serde_json::to_string(&query)?;
+    let (netin, mut netout) = net.into_split();
+    let buf = make_frame(&EventQueryJsonStringFrame(qjs))?;
+    netout.write_all(&buf).await?;
+    let buf = make_term_frame();
+    netout.write_all(&buf).await?;
+    netout.flush().await?;
+    netout.forget();
+    let frames = InMemoryFrameAsyncReadStream::new(netin, perf_opts.inmem_bufcap);
+    let items = EventsFromFrames::new(frames);
+    Ok(Box::pin(items))
+}