Sending a picture to the client. Streaming works on the server but not yet on the relay

main
_ 2020-10-27 03:58:50 +00:00
parent eaca19f6ba
commit 587849bcfa
4 changed files with 52 additions and 8 deletions

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@ -11,6 +11,6 @@ edition = "2018"
futures = "0.3.7" futures = "0.3.7"
hyper = "0.13.8" hyper = "0.13.8"
reqwest = "0.10.8" reqwest = { version = "0.10.8", features = ["stream"] }
tokio = { version = "0.2", features = ["full"] } tokio = { version = "0.2", features = ["full"] }
ulid = "0.4.1" ulid = "0.4.1"

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@ -36,7 +36,7 @@ enum Message {
//HttpRequestRequest (String), //HttpRequestRequest (String),
HttpRequestResponse (String), HttpRequestResponse (String),
// HttpResponseRequest (String), // HttpResponseRequest (String),
HttpResponseResponse (String), HttpResponseResponse (Vec <u8>),
} }
#[derive (Default)] #[derive (Default)]
@ -93,7 +93,7 @@ async fn handle_http_response (
-> Response <Body> -> Response <Body>
{ {
println! ("Step 6"); println! ("Step 6");
let payload = String::from (std::str::from_utf8 (&hyper::body::to_bytes (req.into_body ()).await.unwrap ()).unwrap ()); let payload = hyper::body::to_bytes (req.into_body ()).await.unwrap ().to_vec ();
{ {
let mut watchers = state.watchers.lock ().await; let mut watchers = state.watchers.lock ().await;

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@ -1,22 +1,39 @@
use std::{ use std::{
convert::Infallible,
error::Error, error::Error,
sync::Arc, sync::Arc,
time::Duration,
}; };
use hyper::{ use hyper::{
StatusCode, StatusCode,
Uri, Uri,
}; };
use reqwest::Client; use reqwest::{
use tokio::fs::File; Body,
Client,
};
use tokio::{
fs::File,
io::AsyncReadExt,
sync::mpsc::{
channel,
Receiver,
},
time::delay_for,
};
#[tokio::main] #[tokio::main]
async fn main () -> Result <(), Box <dyn Error>> { async fn main () -> Result <(), Box <dyn Error>> {
let client = Arc::new (Client::new ()); let client = Arc::new (Client::new ());
let path = "/home/user/pictures/bzqcChY.jpg"; let mut backoff_delay = 0;
loop { loop {
if backoff_delay > 0 {
delay_for (Duration::from_millis (backoff_delay)).await;
}
let _uri = Uri::builder () let _uri = Uri::builder ()
.scheme ("http") .scheme ("http")
.authority ("127.0.0.1:4000") .authority ("127.0.0.1:4000")
@ -29,9 +46,13 @@ async fn main () -> Result <(), Box <dyn Error>> {
let req_resp = match req_req.send ().await { let req_resp = match req_req.send ().await {
Err (e) => { Err (e) => {
println! ("Err: {:?}", e); println! ("Err: {:?}", e);
backoff_delay = backoff_delay * 2 + 500;
continue; continue;
}, },
Ok (r) => r, Ok (r) => {
backoff_delay = 0;
r
},
}; };
if req_resp.status () != StatusCode::OK { if req_resp.status () != StatusCode::OK {
@ -57,7 +78,29 @@ async fn main () -> Result <(), Box <dyn Error>> {
.path_and_query ("/listen/alien_wildlands") .path_and_query ("/listen/alien_wildlands")
.build ().unwrap (); .build ().unwrap ();
let resp_req = client.post (&format! ("http://127.0.0.1:4000/http_response/{}", body)).body (payload); let (tx, rx) = channel (2);
//let rx: Receiver <Vec <u8>> = rx;
tokio::spawn (async move {
let path = "/home/user/pictures/bzqcChY.jpg";
let mut f = File::open (path).await.unwrap ();
let mut tx = tx;
loop {
let mut buffer = vec! [0u8; 256];
let bytes_read = f.read (&mut buffer).await.unwrap ();
buffer.truncate (bytes_read);
if bytes_read == 0 {
break;
}
tx.send (Ok::<_, Infallible> (buffer)).await;
}
});
let resp_req = client.post (&format! ("http://127.0.0.1:4000/http_response/{}", body)).body (Body::wrap_stream (rx));
println! ("Step 6"); println! ("Step 6");
match resp_req.send ().await { match resp_req.send ().await {

1
todo.md Normal file
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@ -0,0 +1 @@
- Streaming in Step 6/7 on the relay