use crate::client::WriteMode; /// The error used by the [Http] trait.#[derive(Debug, thiserror::Error)]#[allow(missing_docs)]pub enum Error {    #[error("Could initialize the http client")]    InitHttpClient {        source: Box<dyn std::error::Error + Send + Sync + 'static>,    },    #[error("{description}")]    Detail { description: String },    #[error("An IO error occurred while uploading the body of a POST request")]    PostBody(#[from] std::io::Error),} impl crate::IsSpuriousError for Error {    fn is_spurious(&self) -> bool {        match self {            Error::PostBody(err) => err.is_spurious(),            #[cfg(any(feature = "http-client-reqwest", feature = "http-client-curl"))]            Error::InitHttpClient { source } => {                #[cfg(feature = "http-client-curl")]                if let Some(err) = source.downcast_ref::<crate::client::http::curl::Error>() {                    return err.is_spurious();                };                #[cfg(feature = "http-client-reqwest")]                if let Some(err) = source.downcast_ref::<crate::client::http::reqwest::remote::Error>() {                    return err.is_spurious();                };                false            }            _ => false,        }    }} /// 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,} /// Whether or not the post body is expected to fit into memory or not.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]pub enum PostBodyDataKind {    /// We know how much data we are sending and think it will fit into memory. This allows to collect it into a buffer    /// and send it with `Content-Length: <body-len>`.    BoundedAndFitsIntoMemory,    /// We don't know how much data we will send and assume it won't fit into memory. This enables streaming mode.    Unbounded,} impl From<WriteMode> for PostBodyDataKind {    fn from(m: WriteMode) -> Self {        match m {            WriteMode::Binary => PostBodyDataKind::Unbounded,            WriteMode::OneLfTerminatedLinePerWriteCall => PostBodyDataKind::BoundedAndFitsIntoMemory,        }    }} 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./// Note that 401 must be turned into `std::io::Error(PermissionDenied)`, and other non-success http stati must be transformed/// into `std::io::Error(Other)`#[allow(clippy::type_complexity)]pub trait Http {    /// A type providing headers line by line.    type Headers: std::io::BufRead + Unpin;    /// A type providing the response.    type ResponseBody: std::io::BufRead;    /// A type allowing to write the content to post.    type PostBody: std::io::Write;     /// Initiate a `GET` request to `url` provided the given `headers`, where `base_url` is so that `base_url + tail == url`.    ///    /// The `base_url` helps to validate redirects and to swap it with the effective base after a redirect.    ///    /// The `headers` are provided verbatim and include both the key as well as the value.    fn get(        &mut self,        url: &str,        base_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`, where `base_url` is so that `base_url + tail == url`.    ///    /// The `base_url` helps to validate redirects and to swap it with the effective base after a redirect.    ///    /// 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,        base_url: &str,        headers: impl IntoIterator<Item = impl AsRef<str>>,        body: PostBodyDataKind,    ) -> Result<PostResponse<Self::Headers, Self::ResponseBody, Self::PostBody>, Error>;     /// Pass `config` which can deserialize in the implementation's configuration, as documented separately.    ///    /// The caller must know how that `config` data looks like for the intended implementation.    fn configure(        &mut self,        config: &dyn std::any::Any,    ) -> Result<(), Box<dyn std::error::Error + Send + Sync + 'static>>;}