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use crate::rest::{Error, ErrorKind};
use crate::util::to_base64;
use failure::{Fail, ResultExt};
use hyper::body;
use hyper::header::{ACCEPT, AUTHORIZATION, CONTENT_TYPE, USER_AGENT};
use hyper::{Body, Client, Request};
use hyper_rustls;
use hyper_timeout::TimeoutConnector;
use serde::{Deserialize, Serialize};
use serde_json;
use std::time::Duration;
use tokio::runtime::Builder;
pub fn get<T>(url: &str, api_secret: Option<String>) -> Result<T, Error>
where
for<'de> T: Deserialize<'de>,
{
handle_request(build_request(url, "GET", api_secret, None)?)
}
pub async fn get_async<T>(url: &str, api_secret: Option<String>) -> Result<T, Error>
where
for<'de> T: Deserialize<'de> + Send + 'static,
{
handle_request_async(build_request(url, "GET", api_secret, None)?).await
}
pub fn get_no_ret(url: &str, api_secret: Option<String>) -> Result<(), Error> {
send_request(build_request(url, "GET", api_secret, None)?)?;
Ok(())
}
pub fn post<IN, OUT>(url: &str, api_secret: Option<String>, input: &IN) -> Result<OUT, Error>
where
IN: Serialize,
for<'de> OUT: Deserialize<'de>,
{
let req = create_post_request(url, api_secret, input)?;
handle_request(req)
}
pub async fn post_async<IN, OUT>(
url: &str,
input: &IN,
api_secret: Option<String>,
) -> Result<OUT, Error>
where
IN: Serialize,
OUT: Send + 'static,
for<'de> OUT: Deserialize<'de>,
{
handle_request_async(create_post_request(url, api_secret, input)?).await
}
pub fn post_no_ret<IN>(url: &str, api_secret: Option<String>, input: &IN) -> Result<(), Error>
where
IN: Serialize,
{
send_request(create_post_request(url, api_secret, input)?)?;
Ok(())
}
pub async fn post_no_ret_async<IN>(
url: &str,
api_secret: Option<String>,
input: &IN,
) -> Result<(), Error>
where
IN: Serialize,
{
send_request_async(create_post_request(url, api_secret, input)?).await?;
Ok(())
}
fn build_request(
url: &str,
method: &str,
api_secret: Option<String>,
body: Option<String>,
) -> Result<Request<Body>, Error> {
let mut builder = Request::builder();
if let Some(api_secret) = api_secret {
let basic_auth = format!("Basic {}", to_base64(&format!("grin:{}", api_secret)));
builder = builder.header(AUTHORIZATION, basic_auth);
}
builder
.method(method)
.uri(url)
.header(USER_AGENT, "grin-client")
.header(ACCEPT, "application/json")
.header(CONTENT_TYPE, "application/json")
.body(match body {
None => Body::empty(),
Some(json) => json.into(),
})
.map_err(|e| {
ErrorKind::RequestError(format!("Bad request {} {}: {}", method, url, e)).into()
})
}
pub fn create_post_request<IN>(
url: &str,
api_secret: Option<String>,
input: &IN,
) -> Result<Request<Body>, Error>
where
IN: Serialize,
{
let json = serde_json::to_string(input).context(ErrorKind::Internal(
"Could not serialize data to JSON".to_owned(),
))?;
build_request(url, "POST", api_secret, Some(json))
}
fn handle_request<T>(req: Request<Body>) -> Result<T, Error>
where
for<'de> T: Deserialize<'de>,
{
let data = send_request(req)?;
serde_json::from_str(&data).map_err(|e| {
e.context(ErrorKind::ResponseError("Cannot parse response".to_owned()))
.into()
})
}
async fn handle_request_async<T>(req: Request<Body>) -> Result<T, Error>
where
for<'de> T: Deserialize<'de> + Send + 'static,
{
let data = send_request_async(req).await?;
let ser = serde_json::from_str(&data)
.map_err(|e| e.context(ErrorKind::ResponseError("Cannot parse response".to_owned())))?;
Ok(ser)
}
async fn send_request_async(req: Request<Body>) -> Result<String, Error> {
let https = hyper_rustls::HttpsConnector::new();
let mut connector = TimeoutConnector::new(https);
connector.set_connect_timeout(Some(Duration::from_secs(20)));
connector.set_read_timeout(Some(Duration::from_secs(20)));
connector.set_write_timeout(Some(Duration::from_secs(20)));
let client = Client::builder().build::<_, Body>(connector);
let resp = client
.request(req)
.await
.map_err(|e| ErrorKind::RequestError(format!("Cannot make request: {}", e)))?;
if !resp.status().is_success() {
return Err(ErrorKind::RequestError(format!(
"Wrong response code: {} with data {:?}",
resp.status(),
resp.body()
))
.into());
}
let raw = body::to_bytes(resp)
.await
.map_err(|e| ErrorKind::RequestError(format!("Cannot read response body: {}", e)))?;
Ok(String::from_utf8_lossy(&raw).to_string())
}
pub fn send_request(req: Request<Body>) -> Result<String, Error> {
let mut rt = Builder::new()
.basic_scheduler()
.enable_all()
.build()
.map_err(|e| ErrorKind::RequestError(format!("{}", e)))?;
rt.block_on(send_request_async(req))
}