为什么来自Hyper crate的多次导入失败？

Question

我正在使用Rust中一个非常简单的HTTP客户端,它基于hyper(GitHub,crates.io)包.

当我尝试examples/client.rs使用cargo build(以及使用rustc src/main.rs)在新的Cargo项目中复制文件时,我会收到由导入失败导致的多个错误hyper.

这是我的最高层main.rs:

extern crate hyper;

use hyper::client::{Client, Request, Response, DefaultTransport as HttpStream};
use hyper::header::Connection;
use hyper::{Decoder, Encoder, Next};

除了一些注释之外,文件的其余部分与存储库中的examples/client.rs文件相同hyper.

在编译时,我收到以下错误:

src/main.rs:10:48: 10:78 error: unresolved import `hyper::client::DefaultTransport`. There is no `DefaultTransport` in `hyper::client` [E0432]
src/main.rs:10 use hyper::client::{Client, Request, Response, DefaultTransport as HttpStream};
                                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/main.rs:10:48: 10:78 help: run `rustc --explain E0432` to see a detailed explanation
src/main.rs:12:13: 12:20 error: unresolved import `hyper::Decoder`. There is no `Decoder` in `hyper` [E0432]
src/main.rs:12 use hyper::{Decoder, Encoder, Next};
                           ^~~~~~~
src/main.rs:12:13: 12:20 help: run `rustc --explain E0432` to see a detailed explanation
src/main.rs:12:22: 12:29 error: unresolved import `hyper::Encoder`. There is no `Encoder` in `hyper` [E0432]
src/main.rs:12 use hyper::{Decoder, Encoder, Next};
                                    ^~~~~~~
src/main.rs:12:22: 12:29 help: run `rustc --explain E0432` to see a detailed explanation
src/main.rs:12:31: 12:35 error: unresolved import `hyper::Next`. There is no `Next` in `hyper` [E0432]
src/main.rs:12 use hyper::{Decoder, Encoder, Next};
                                             ^~~~
src/main.rs:12:31: 12:35 help: run `rustc --explain E0432` to see a detailed explanation
src/main.rs:53:6: 53:40 error: trait `hyper::client::Handler` is not in scope [E0405]
src/main.rs:53 impl hyper::client::Handler<HttpStream> for Dump {
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/main.rs:53:6: 53:40 help: run `rustc --explain E0405` to see a detailed explanation
src/main.rs:53:6: 53:40 help: you can to import it into scope: `use hyper::server::Handler;`.

如果它可能导致这个问题,这里是我的内容Cargo.toml:

name = "my_project"
version = "0.0.1"
authors = ["email@example.com"]

[dependencies]
getopts = "0.2"
hyper = "0.9.6"

[[bin]]
name = "my_project"

一些导入实际上正在工作,所以假设存储库中的示例是最新的,我真的不知道什么是错的.crate的源文件看起来像是暴露了所涉及的类型,但我对Rust很新,所以我可能会误读这些文件.

Answer 1

您正在使用主分支中不适用于0.9.6版本的示例.您可以查看分支上的示例0.9.6或hyper直接从github 使用货物,写在Cargo.toml:

[dependencies]                                     
hyper = {git = "https://github.com/hyperium/hyper"}