199 lines
4.4 KiB
Rust
199 lines
4.4 KiB
Rust
use std::{
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collections::*,
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convert::{TryFrom, TryInto},
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};
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use serde::{Deserialize, Serialize};
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use tokio::sync::mpsc;
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// Hyper doesn't seem to make it easy to de/ser requests
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// and responses and stuff like that, so I do it by hand here.
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pub enum Error {
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UnsupportedMethod,
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InvalidHeaderName,
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}
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impl From <hyper::header::InvalidHeaderName> for Error {
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fn from (_x: hyper::header::InvalidHeaderName) -> Self {
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Self::InvalidHeaderName
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}
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}
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#[derive (Debug, Deserialize, Serialize)]
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pub enum Method {
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Get,
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Head,
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Post,
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Put,
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}
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impl TryFrom <hyper::Method> for Method {
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type Error = Error;
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fn try_from (x: hyper::Method) -> Result <Self, Error> {
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match x {
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hyper::Method::GET => Ok (Self::Get),
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hyper::Method::HEAD => Ok (Self::Head),
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_ => Err (Error::UnsupportedMethod),
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}
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}
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}
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#[derive (Deserialize, Serialize)]
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pub struct RequestParts {
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pub method: Method,
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// Technically URIs are subtle and complex, but I don't care
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pub uri: String,
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// Technically Hyper has headers in a multi-map
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// but I don't feel like doing that right now.
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// Headers are _kinda_ ASCII but they can also be binary.
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// HTTP is nutty.
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pub headers: HashMap <String, Vec <u8>>,
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}
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impl RequestParts {
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pub fn from_hyper (
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method: hyper::Method,
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uri: String,
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headers: hyper::HeaderMap <hyper::header::HeaderValue>
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) -> Result <Self, Error>
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{
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use std::iter::FromIterator;
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let method = Method::try_from (method)?;
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let headers = HashMap::from_iter (
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headers.into_iter ()
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.filter_map (|(k, v)| k.map (|k| (k, v)))
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.map (|(k, v)| (String::from (k.as_str ()), v.as_bytes ().to_vec ()))
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);
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Ok (Self {
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method,
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uri,
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headers,
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})
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}
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}
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#[derive (Deserialize, Serialize)]
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pub struct WrappedRequest {
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pub id: String,
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pub req: RequestParts,
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}
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#[derive (Debug, Deserialize, Serialize, PartialEq)]
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pub enum StatusCode {
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Ok, // 200
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NoContent, // 204
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PartialContent, // 206
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TemporaryRedirect, // 307
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BadRequest, // 400
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Forbidden, // 403
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NotFound, // 404
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MethodNotAllowed, // 405
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RangeNotSatisfiable, // 416
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}
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impl Default for StatusCode {
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fn default () -> Self {
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Self::Ok
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}
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}
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impl From <StatusCode> for hyper::StatusCode {
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fn from (x: StatusCode) -> Self {
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match x {
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StatusCode::Ok => Self::OK,
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StatusCode::NoContent => Self::NO_CONTENT,
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StatusCode::PartialContent => Self::PARTIAL_CONTENT,
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StatusCode::TemporaryRedirect => Self::TEMPORARY_REDIRECT,
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StatusCode::BadRequest => Self::BAD_REQUEST,
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StatusCode::Forbidden => Self::FORBIDDEN,
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StatusCode::NotFound => Self::NOT_FOUND,
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StatusCode::MethodNotAllowed => Self::METHOD_NOT_ALLOWED,
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StatusCode::RangeNotSatisfiable => Self::RANGE_NOT_SATISFIABLE,
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}
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}
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}
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#[derive (Default, Deserialize, Serialize)]
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pub struct ResponseParts {
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pub status_code: StatusCode,
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// Technically Hyper has headers in a multi-map
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// but I don't feel like doing that right now.
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// We promise not to need this feature.
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pub headers: HashMap <String, Vec <u8>>,
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}
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// reqwest and hyper have different Body types for _some reason_
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// so I have to do everything myself
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type Body = mpsc::Receiver <Result <Vec <u8>, std::convert::Infallible>>;
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#[derive (Default)]
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pub struct Response {
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pub parts: ResponseParts,
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pub body: Option <Body>,
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// Needed to make Nginx happy
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pub content_length: Option <u64>,
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}
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impl Response {
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pub async fn into_bytes (self) -> Vec <u8> {
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let mut body = match self.body {
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None => return Vec::new (),
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Some (x) => x,
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};
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let mut result = match self.content_length {
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None => Vec::new (),
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Some (x) => Vec::with_capacity (x.try_into ().unwrap ()),
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};
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while let Some (Ok (mut chunk)) = body.recv ().await {
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result.append (&mut chunk);
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}
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result
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}
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pub fn status_code (&mut self, c: StatusCode) -> &mut Self {
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self.parts.status_code = c;
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self
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}
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pub fn header (&mut self, k: String, v: Vec <u8>) -> &mut Self {
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self.parts.headers.insert (k, v);
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self
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}
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pub fn body (&mut self, b: Body) -> &mut Self {
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self.body = Some (b);
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self
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}
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pub fn body_bytes (&mut self, b: Vec <u8>) -> &mut Self {
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self.content_length = b.len ().try_into ().ok ();
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self.header ("content-length".to_string (), b.len ().to_string ().into_bytes ());
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let (mut tx, rx) = tokio::sync::mpsc::channel (1);
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tokio::spawn (async move {
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tx.send (Ok (b)).await.ok ();
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});
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self.body = Some (rx);
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self
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}
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}
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