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use std::collections::HashMap;
use bytes::Bytes;
use serde::{Deserialize, Serialize};
use aws_smithy_types::base64;
pub use record::RecordingConnection;
pub use replay::ReplayingConnection;
mod record;
mod replay;
#[derive(Debug, Serialize, Deserialize)]
pub struct NetworkTraffic {
events: Vec<Event>,
docs: Option<String>,
version: Version,
}
impl NetworkTraffic {
pub fn events(&self) -> &Vec<Event> {
&self.events
}
}
#[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
pub enum Version {
V0,
}
#[derive(Copy, Clone, Debug, Serialize, Deserialize, Hash, PartialEq, Eq)]
pub struct ConnectionId(usize);
#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
pub struct Event {
connection_id: ConnectionId,
action: Action,
}
#[derive(Debug, Serialize, Deserialize, Clone, Eq, PartialEq)]
pub struct Request {
uri: String,
headers: HashMap<String, Vec<String>>,
method: String,
}
#[derive(Debug, Serialize, Deserialize, Clone, Eq, PartialEq)]
pub struct Response {
status: u16,
version: String,
headers: HashMap<String, Vec<String>>,
}
impl From<&Request> for http::Request<()> {
fn from(request: &Request) -> Self {
let mut builder = http::Request::builder().uri(request.uri.as_str());
for (k, values) in request.headers.iter() {
for v in values {
builder = builder.header(k, v);
}
}
builder.method(request.method.as_str()).body(()).unwrap()
}
}
impl<'a, B> From<&'a http::Request<B>> for Request {
fn from(req: &'a http::Request<B>) -> Self {
let uri = req.uri().to_string();
let headers = headers_to_map(req.headers());
let method = req.method().to_string();
Self {
uri,
headers,
method,
}
}
}
fn headers_to_map(headers: &http::HeaderMap<http::HeaderValue>) -> HashMap<String, Vec<String>> {
let mut out: HashMap<_, Vec<_>> = HashMap::new();
for (header_name, header_value) in headers.iter() {
let entry = out.entry(header_name.to_string()).or_default();
entry.push(header_value.to_str().unwrap().to_string());
}
out
}
impl<'a, B> From<&'a http::Response<B>> for Response {
fn from(resp: &'a http::Response<B>) -> Self {
let status = resp.status().as_u16();
let version = format!("{:?}", resp.version());
let headers = headers_to_map(resp.headers());
Self {
status,
version,
headers,
}
}
}
#[derive(Debug, Serialize, Deserialize, Clone, Eq, PartialEq)]
pub struct Error(String);
#[derive(Debug, Serialize, Deserialize, Clone, Eq, PartialEq)]
#[non_exhaustive]
pub enum Action {
Request {
request: Request,
},
Response {
response: Result<Response, Error>,
},
Data {
data: BodyData,
direction: Direction,
},
Eof {
ok: bool,
direction: Direction,
},
}
#[derive(Copy, Clone, Debug, Serialize, Deserialize, Eq, PartialEq)]
pub enum Direction {
Request,
Response,
}
impl Direction {
pub fn opposite(self) -> Self {
match self {
Direction::Request => Direction::Response,
Direction::Response => Direction::Request,
}
}
}
#[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq)]
#[non_exhaustive]
pub enum BodyData {
Utf8(String),
Base64(String),
}
impl BodyData {
pub fn into_bytes(self) -> Vec<u8> {
match self {
BodyData::Utf8(string) => string.into_bytes(),
BodyData::Base64(string) => base64::decode(string).unwrap(),
}
}
pub fn copy_to_vec(&self) -> Vec<u8> {
match self {
BodyData::Utf8(string) => string.as_bytes().into(),
BodyData::Base64(string) => base64::decode(string).unwrap(),
}
}
}
impl From<Bytes> for BodyData {
fn from(data: Bytes) -> Self {
match std::str::from_utf8(data.as_ref()) {
Ok(string) => BodyData::Utf8(string.to_string()),
Err(_) => BodyData::Base64(base64::encode(data)),
}
}
}
#[cfg(test)]
mod tests {
use std::error::Error;
use std::fs;
use aws_smithy_http::body::SdkBody;
use aws_smithy_http::byte_stream::ByteStream;
use crate::dvr::{NetworkTraffic, RecordingConnection, ReplayingConnection};
use bytes::Bytes;
use http::Uri;
#[tokio::test]
async fn turtles_all_the_way_down() -> Result<(), Box<dyn Error>> {
let network_traffic = fs::read_to_string("test-data/example.com.json")?;
let network_traffic: NetworkTraffic = serde_json::from_str(&network_traffic)?;
let inner = ReplayingConnection::new(network_traffic.events.clone());
let mut connection = RecordingConnection::new(inner.clone());
let req = http::Request::post("https://www.example.com")
.body(SdkBody::from("hello world"))
.unwrap();
use tower::Service;
let mut resp = connection.call(req).await.expect("ok");
let body = std::mem::replace(resp.body_mut(), SdkBody::taken());
let data = ByteStream::new(body).collect().await.unwrap().into_bytes();
assert_eq!(
String::from_utf8(data.to_vec()).unwrap(),
"hello from example.com"
);
assert_eq!(
connection.events().as_slice(),
network_traffic.events.as_slice()
);
let requests = inner.take_requests().await;
assert_eq!(
requests[0].uri(),
&Uri::from_static("https://www.example.com")
);
assert_eq!(
requests[0].body(),
&Bytes::from_static("hello world".as_bytes())
);
Ok(())
}
}