Why are multiple imports from the Hyper crate failing? - rust

Question

I'm working on a very simple HTTP client in Rust, built on top of the hyper (GitHub, crates.io) crate.
When I try to replicate the examples/client.rs file in a new Cargo project using cargo build (as well as using rustc src/main.rs), I get multiple errors caused by failed imports from hyper.
Here's the top of my main.rs:
extern crate hyper;
use hyper::client::{Client, Request, Response, DefaultTransport as HttpStream};
use hyper::header::Connection;
use hyper::{Decoder, Encoder, Next};
The rest of the file is, except for some comments, identical to the examples/client.rs file from the hyper repository.
At compile time, I get the following errors:
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;`.
In case it may contribute to this issue, here are the contents of my 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"
Some of the imports are actually working, so assuming the example in the repository is up to date, I really can't tell what's wrong. The source files of the crate look like they expose the involved types, but I'm very new to Rust so I may be misreading the files.

Answer 1

You are using examples from the master branch that do not work with 0.9.6 version. You can take a look at examples on the branch 0.9.6 or make cargo use hyper direct from github, writing on Cargo.toml:
[dependencies]
hyper = {git = "https://github.com/hyperium/hyper"}