Rust下载并保存ZIP文件

Question

我正在尝试下载和保存一个Zip文件。看起来下载正常，但保存时出现问题。如果我尝试解压缩文件，就会出现以下错误：

Archive:  download.zip
error [download.zip]:  missing 3208647056 bytes in zipfile
  (attempting to process anyway)
error [download.zip]:  attempt to seek before beginning of zipfile
  (please check that you have transferred or created the zipfile in the
  appropriate BINARY mode and that you have compiled UnZip properly)

这是我正在使用的代码：

cargo.toml

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
reqwest = { version = "0.10"}
tokio = { version = "0.2", features = ["full"] }
error-chain = "0.12.2"

src/main.rs

use error_chain::error_chain;
use std::path::Path;
use std::fs::File;
use std::io::prelude::*;

error_chain! {
     foreign_links {
         Io(std::io::Error);
         HttpRequest(reqwest::Error);
     }
}

#[tokio::main]
async fn main() -> Result<()> {
    let target = "https://github.com/twbs/bootstrap/archive/v4.0.0.zip";
    let response = reqwest::get(target).await?;

    let path = Path::new("./download.zip");

    let mut file = match File::create(&path) {
        Err(why) => panic!("couldn't create {}", why),
        Ok(file) => file,
    };
    let content =  response.text().await?;
    file.write_all(content.as_bytes())?;
    Ok(())
}

有人能帮我吗？

- Debru

---

还要注意的是，由于std类型都是阻塞的，因此在这里实际上不会异步执行任何操作。 - mcarton

谢谢，你说得对。我不知道为什么没看到这个！现在它可以工作了。 - Debru

Answer 1

reqwest::Response::text 方法会尝试解析请求正文并用替换字符(REPLACEMENT CHARACTER)代替任何无效的UTF-8序列。对于二进制文件，这将导致文件损坏。

相反，您需要使用reqwest::Response::bytes方法，该方法原样返回内容。

- mcarton