Question

我的主人：

use std::fs::File;
use std::io::prelude::*;

fn read_file(file_name: &str, file_path: &str) -> Vec<String> {
    let file_open_error = format!("File {} by path {} not found!", file_name, file_path);
    let file_read_error = format!(
        "Can't read the file {}\\{}, the error:{}",
        file_path, file_name
    );

    let mut file = File::open(format!("{}\\{}", file_path, file_name)).expect(&*file_open_error);

    let mut content = String::new();
    file.read_to_string(&mut content).expect(&*file_read_error);

    content
        .split_whitespace()
        .map(|s| s.to_string())
        .collect::<Vec<String>>()
}

fn get_random_value<'a>(vec: &'a Vec<String>) -> &'a String {
    let mut rng = rand::thread_rng();
    rng.choose(&vec).unwrap()
}

fn main() {
    let names_file_name = "names.txt";
    let adjectives_file_name = "adjectives.txt";
    let file_path = "D:\\nameadj";

    let names = read_file(names_file_name, file_path);
    let adjectives = read_file(adjectives_file_name, file_path);

    let name = get_random_value(&names);
    let adjective = get_random_value(&adjectives);
    println!("name={};adjective={}", name, adjective);
}

我编译了它：

cargo build --release --target wasm32-unknown-emscripten

我创建了一个简单的HTML文件，我调用了JavaScript文件，我保存在这里：

target\wasm32-unknown-emscripten\release

我跑的时候

emrun --browser firefox --port 8080 tryrustwebasm.html

我的浏览器的控制台日志中有错误：

thread 'main' panicked at 'File names.txt by path D:\nameadj not found!: Error { repr: Os { code: 2, message: "No such file or directory" } }', /checkout/src/libcore/result.rs:906:4

当我运行没有emrun的程序时：

cargo run

程序运行正常。

我做错了什么？这是权限问题吗？我该如何解决？

如何从WebAssembly读取本地磁盘中的文件？

0 个答案: