use quick_error::quick_error;use std::io; quick_error! {    /// The error used by the [Http] trait.    #[derive(Debug)]    #[allow(missing_docs)]    pub enum Error {        Detail(description: String) {            display("{}", description)        }        PostBody(err: io::Error) {            display("An IO error occurred while uploading the body of a POST request")            from()            source(err)        }    }} /// The return value of [Http::get()].pub struct GetResponse<H, B> {    /// The response headers.    pub headers: H,    /// The response body.    pub body: B,} /// The return value of [Http::post()].pub struct PostResponse<H, B, PB> {    /// The body to post to the server as part of the request.    ///    /// **Note**: Implementations should drop the handle to avoid deadlocks.    pub post_body: PB,    /// The headers of the post response.    pub headers: H,    /// The body of the post response.    pub body: B,} impl<A, B, C> From<PostResponse<A, B, C>> for GetResponse<A, B> {    fn from(v: PostResponse<A, B, C>) -> Self {        GetResponse {            headers: v.headers,            body: v.body,        }    }} /// A trait to abstract the HTTP operations needed to power all git interactions: read via GET and write via POST.#[allow(clippy::type_complexity)]pub trait Http {    /// A type providing headers line by line.    type Headers: io::BufRead;    /// A type providing the response.    type ResponseBody: io::BufRead;    /// A type allowing to write the content to post.    type PostBody: io::Write;     /// Initiate a `GET` request to `url` provided the given `headers`.    ///    /// The `headers` are provided verbatim and include both the key as well as the value.    fn get(        &mut self,        url: &str,        headers: impl IntoIterator<Item = impl AsRef<str>>,    ) -> Result<GetResponse<Self::Headers, Self::ResponseBody>, Error>;     /// Initiate a `POST` request to `url` providing with the given `headers`.    ///    /// The `headers` are provided verbatim and include both the key as well as the value.    /// Note that the [`PostResponse`] contains the [`post_body`][PostResponse::post_body] field which implements [`std::io::Write`]    /// and is expected to receive the body to post to the server. **It must be dropped** before reading the response    /// to prevent deadlocks.    fn post(        &mut self,        url: &str,        headers: impl IntoIterator<Item = impl AsRef<str>>,    ) -> Result<PostResponse<Self::Headers, Self::ResponseBody, Self::PostBody>, Error>;}