I have a vector and I want to make multiple requests and get vector of values. Something like:
use actix_web::client;
let nums = vec![1, 2, 3];
let values = nums.map(|num| {
client::ClientRequest::get("http://example.com".to_owned() + &num);
});
And I will get [1, 4, 9].
Said another way:
fn question_data(id: &str) -> Box<Future<Item = Question, Error = actix_web::error::Error>> {
let f = std::fs::read_to_string("auth_token").unwrap();
let token = f.trim();
Box::new(
client::ClientRequest::get("https://example.com/api/questions/".to_owned() + id)
.header(
actix_web::http::header::AUTHORIZATION,
"Bearer ".to_owned() + token,
)
.finish()
.unwrap()
.send()
.timeout(Duration::from_secs(30))
.map_err(actix_web::error::Error::from) // <- convert SendRequestError to an Error
.and_then(|resp| {
resp.body().limit(67_108_864).from_err().and_then(|body| {
let resp: QuestionResponse = serde_json::from_slice(&body).unwrap();
fut_ok(resp.data)
})
}),
)
}
Then I use it:
let question_ids = vec!["q1", "q2", "q3"];
let mut questions = questions_data().wait().expect("Failed to fetch questions");
let question = question_data("q2")
.wait()
.expect("Failed to fetch question");
println!("{:?}", question);
let data = question_ids.map(|id| Box::new(question_data(id)));
But I get the error:
245 | let data = question_ids.map(|id| Box::new(question_data(id)));
| ^^^
|
= note: the method `map` exists but the following trait bounds were not satisfied:
`&mut std::vec::Vec<std::string::String> : futures::Future`
`&mut std::vec::Vec<std::string::String> : std::iter::Iterator`
`&mut [std::string::String] : futures::Future`
`&mut [std::string::String] : std::iter::Iterator`
These are similar but does not compile for me, and also I want to use actix-web: