我对 Rust 很陌生,我似乎无法找到解决这个问题的方法。我正在尝试以 json 形式获取 get 请求的响应。
#[macro_use]
extern crate serde;
extern crate serde_derive;
extern crate reqwest;
use reqwest::Error;
fn main(){
#[derive(Deserialize)]
struct Ip {
origin: String,
}
let json: Ip = reqwest::get("http://httpbin.org/ip").json();
//reqwest::get("http://httpbin.org/ip")?.json()?;
}
这是 cargo.toml
[dependencies]
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
serde_derive = "1.0"
reqwest = { version = "0.10", features = ["blocking"] }
我不断收到的错误是
还,
如果我使用
reqwest::get("http://httpbin.org/ip")?.json()?;
(添加问号)
我收到另一个错误说
cannot use the `?` operator in a function that returns `()`
this function should return `Result` or `Option` to accept `?`
我该如何解决这些问题?
最佳答案
根据 doc ,您需要启用json
Cargo.toml
中的 reqwest 功能:
reqwest = { version = "0.10", features = ["blocking", "json"] }
另外,
reqwest::get
是 async
的一部分API。由于您的main
是同步的,你想要 reqwest::blocking::get
关于反序列化 reqwest 响应时找不到 json 方法,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61629447/