mirror of https://github.com/knative/docs.git
121 lines
3.9 KiB
Rust
121 lines
3.9 KiB
Rust
/*
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Copyright 2020 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#[macro_use]
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extern crate log;
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use actix_web::dev::HttpResponseBuilder;
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use actix_web::http::StatusCode;
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use actix_web::{post, web, App, HttpRequest, HttpResponse, HttpServer};
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use cloudevents::{EventBuilder, EventBuilderV10};
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use cloudevents_sdk_actix_web::{HttpRequestExt, HttpResponseBuilderExt};
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use cloudevents_sdk_reqwest::RequestBuilderExt;
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#[post("/")]
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async fn reply_event(
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req: HttpRequest,
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payload: web::Payload,
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) -> Result<HttpResponse, actix_web::Error> {
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let request_event = req.to_event(payload).await?;
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info!("{}", request_event);
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// Build response event cloning the original event and setting the new type and source
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let response_event = EventBuilderV10::from(request_event)
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.source("https://github.com/knative/docs/code-samples/serving/cloudevents/cloudevents-rust")
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.ty("dev.knative.docs.sample")
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.build()
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// If i can't build the event, fail with internal server error
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.map_err(actix_web::error::ErrorInternalServerError)?;
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HttpResponseBuilder::new(StatusCode::OK)
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.event(response_event)
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.await
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}
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#[post("/")]
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async fn forward_event(
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req: HttpRequest,
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payload: web::Payload,
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sink_url: web::Data<String>,
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) -> Result<HttpResponse, actix_web::Error> {
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let sink_url: &str = &sink_url;
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let request_event = req.to_event(payload).await?;
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info!("{}", request_event);
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// Build response event cloning the original event and setting the new type and source
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let forward_event = EventBuilderV10::from(request_event)
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.source("https://github.com/knative/docs/code-samples/serving/cloudevents/cloudevents-rust")
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.ty("dev.knative.docs.sample")
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.build()
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// If i can't build the event, fail with internal server error
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.map_err(actix_web::error::ErrorInternalServerError)?;
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let client = reqwest::Client::new();
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let response = client.post(sink_url)
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.event(forward_event)
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.map_err(actix_web::error::ErrorInternalServerError)?
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.send()
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.await
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// If something went wrong when sending the event, fail with internal server error
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.map_err(actix_web::error::ErrorInternalServerError)?;
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if response.status().is_success() {
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Ok(HttpResponseBuilder::new(StatusCode::ACCEPTED).finish())
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} else {
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Ok(
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HttpResponseBuilder::new(StatusCode::INTERNAL_SERVER_ERROR).body(format!(
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"Received from {} status code {}",
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sink_url,
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response.status().as_str()
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)),
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)
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}
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}
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#[actix_rt::main]
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async fn main() -> std::io::Result<()> {
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// Setup logger
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std::env::set_var("RUST_LOG", "info");
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env_logger::init();
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// Get port from envs
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let port: u16 = std::env::var("PORT")
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.ok()
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.map(|e| e.parse().ok())
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.flatten()
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.unwrap_or(8080);
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// Create the HTTP server
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HttpServer::new(|| {
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let app_base = App::new().wrap(actix_web::middleware::Logger::default());
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// Get k_sink env
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let k_sink = std::env::var("K_SINK").ok();
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// If k_sink is configured, then we start the app in forward mode
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// Otherwise, we set it in reply mode
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match k_sink {
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Some(sink) => app_base.data(sink).service(forward_event),
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None => app_base.service(reply_event),
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}
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})
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.bind(("127.0.0.1", port))?
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.workers(1)
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.run()
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.await
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}
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