Rust小程序的编译错误记录

使用vim ${HOME}/.cargo/config，然后在这个文件里边填上下边的内容：

[source.crates-io]
registry = "https://github.com/rust-lang/crates.io-index"
replace-with = 'ustc'
[source.ustc]
registry = "git://mirrors.ustc.edu.cn/crates.io-index"

在这里插入图片描述
使用cargo new test_rust创建一个可执行项目，使用yum install tree安装tree，tree -F .查看可执行目录下有什么。
在这里插入图片描述
使用vim test_rust/Cargo.toml填上以下的内容：

name = "test_rust"
version = "0.1.0"
edition = "2021"

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

[dependencies]
reqwest = { version = "0.11",features = ["blocking"]}
html2md = "0.2"

使用vim test_rust/src/main.rs填上如下的内容：

use std::fs;
use std::path::PathBuf;
fn main() {
  let url = "https://www.baidu.com/";
  let output = "baidu.md";

  println!("获取到的地址: {}", url);
  let body = reqwest::blocking::get(url).unwrap().text().unwrap();

  println!("正在转换中");
  let md = html2md::parse_html(&body);
  fs::write(output, md.as_bytes()).unwrap();
  let mut config_path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
  config_path.push(output);
  println!("md放到的位置：{:?}",config_path);
}

在这里插入图片描述

使用cd test_rust进入到可执行目录里边，然后执行cargo run，
发现报了许多下边的内容：

    Updating `ustc` index
  Downloaded aho-corasick v0.7.18 (registry `ustc`)
  Downloaded foreign-types v0.3.2 (registry `ustc`)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
  Downloaded foreign-types-shared v0.1.1 (registry `ustc`)
warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates)
error: failed to download from `https://crates-io.proxy.ustclug.org/api/v1/crates/cfg-if/1.0.0/download`

Caused by:
  [6] Couldn't resolve host name (Could not resolve host: crates)

在这里插入图片描述
解决方案参照https://mirrors.ustc.edu.cn/help/crates.io-index.html。
在这里插入图片描述

使用export CARGO_HTTP_MULTIPLEXING=false设置一下，然后再使用 cargo run执行。

 Downloaded autocfg v1.1.0 (registry `ustc`)
  Downloaded futures-task v0.3.21 (registry `ustc`)
  Downloaded bytes v1.1.0 (registry `ustc`)
  Downloaded lazy_static v1.4.0 (registry `ustc`)
  Downloaded pin-project-lite v0.2.8 (registry `ustc`)
  Downloaded rand_core v0.6.3 (registry `ustc`)
  Downloaded socket2 v0.4.4 (registry `ustc`)
  Downloaded unicode-normalization v0.1.19 (registry `ustc`)
  Downloaded parking_lot_core v0.9.2 (registry `ustc`)
  Downloaded h2 v0.3.13 (registry `ustc`)
  Downloaded precomputed-hash v0.1.1 (registry `ustc`)
  Downloaded proc-macro2 v1.0.37 (registry `ustc`)
  Downloaded try-lock v0.2.3 (registry `ustc`)
  Downloaded cfg-if v1.0.0 (registry `ustc`)
  Downloaded futures-io v0.3.21 (registry `ustc`)
  Downloaded regex-syntax v0.6.25 (registry `ustc`)
  Downloaded httpdate v1.0.2 (registry `ustc`)
  Downloaded itoa v1.0.1 (registry `ustc`)
  Downloaded hyper-tls v0.5.0 (registry `ustc`)
  Downloaded markup5ever_rcdom v0.1.0 (registry `ustc`)
  Downloaded native-tls v0.2.10 (registry `ustc`)
  Downloaded openssl-probe v0.1.5 (registry `ustc`)
  Downloaded libc v0.2.122 (registry `ustc`)
  Downloaded openssl v0.10.38 (registry `ustc`)
  Downloaded phf_shared v0.10.0 (registry `ustc`)
  Downloaded pkg-config v0.3.25 (registry `ustc`)
  Downloaded siphasher v0.3.10 (registry `ustc`)
  Downloaded string_cache v0.8.4 (registry `ustc`)
  Downloaded tower-service v0.3.1 (registry `ustc`)
  Downloaded tokio v1.17.0 (registry `ustc`)
  Downloaded bitflags v1.3.2 (registry `ustc`)
  Downloaded futures-channel v0.3.21 (registry `ustc`)
  Downloaded tracing v0.1.33 (registry `ustc`)
  Downloaded futures-util v0.3.21 (registry `ustc`)
  Downloaded hashbrown v0.11.2 (registry `ustc`)
  Downloaded html2md v0.2.13 (registry `ustc`)
  Downloaded base64 v0.13.0 (registry `ustc`)
  Downloaded log v0.4.16 (registry `ustc`)
  Downloaded hyper v0.14.18 (registry `ustc`)
  Downloaded markup5ever v0.10.1 (registry `ustc`)
  Downloaded num_cpus v1.13.1 (registry `ustc`)
  Downloaded percent-encoding v2.1.0 (registry `ustc`)
  Downloaded mio v0.8.2 (registry `ustc`)
  Downloaded phf_shared v0.8.0 (registry `ustc`)
  Downloaded memchr v2.4.1 (registry `ustc`)
  Downloaded rand v0.7.3 (registry `ustc`)
  Downloaded serde_urlencoded v0.7.1 (registry `ustc`)
  Downloaded reqwest v0.11.10 (registry `ustc`)
  Downloaded tinyvec v1.5.1 (registry `ustc`)
  Downloaded tokio-native-tls v0.3.0 (registry `ustc`)
  Downloaded syn v1.0.91 (registry `ustc`)
  Downloaded unicode-xid v0.2.2 (registry `ustc`)
  Downloaded want v0.3.0 (registry `ustc`)
  Downloaded regex v1.5.5 (registry `ustc`)
  Downloaded futf v0.1.5 (registry `ustc`)
  Downloaded getrandom v0.1.16 (registry `ustc`)
  Downloaded http v0.2.6 (registry `ustc`)
  Downloaded form_urlencoded v1.0.1 (registry `ustc`)
  Downloaded ipnet v2.4.0 (registry `ustc`)
  Downloaded matches v0.1.9 (registry `ustc`)
  Downloaded once_cell v1.10.0 (registry `ustc`)
  Downloaded phf v0.8.0 (registry `ustc`)
  Downloaded phf_generator v0.10.0 (registry `ustc`)
  Downloaded rand v0.8.5 (registry `ustc`)
  Downloaded scopeguard v1.1.0 (registry `ustc`)
  Downloaded slab v0.4.6 (registry `ustc`)
  Downloaded string_cache_codegen v0.5.2 (registry `ustc`)
  Downloaded encoding_rs v0.8.31 (registry `ustc`)
  Downloaded tokio-util v0.7.1 (registry `ustc`)
  Downloaded tracing-core v0.1.24 (registry `ustc`)
  Downloaded xml5ever v0.16.2 (registry `ustc`)
  Downloaded getrandom v0.2.6 (registry `ustc`)
  Downloaded httparse v1.6.0 (registry `ustc`)
  Downloaded url v2.2.2 (registry `ustc`)
  Downloaded lock_api v0.4.7 (registry `ustc`)
  Downloaded new_debug_unreachable v1.0.4 (registry `ustc`)
  Downloaded phf_codegen v0.8.0 (registry `ustc`)
  Downloaded ppv-lite86 v0.2.16 (registry `ustc`)
  Downloaded ryu v1.0.9 (registry `ustc`)
  Downloaded time v0.1.43 (registry `ustc`)
  Downloaded serde v1.0.136 (registry `ustc`)
  Downloaded tracing-attributes v0.1.20 (registry `ustc`)
  Downloaded futures-sink v0.3.21 (registry `ustc`)
  Downloaded cc v1.0.73 (registry `ustc`)
  Downloaded mime v0.3.16 (registry `ustc`)
  Downloaded phf_generator v0.8.0 (registry `ustc`)
  Downloaded rand_core v0.5.1 (registry `ustc`)
  Downloaded smallvec v1.8.0 (registry `ustc`)
  Downloaded idna v0.2.3 (registry `ustc`)
  Downloaded quote v1.0.18 (registry `ustc`)
  Downloaded fnv v1.0.7 (registry `ustc`)
  Downloaded http-body v0.4.4 (registry `ustc`)
  Downloaded openssl-sys v0.9.72 (registry `ustc`)
  Downloaded rand_chacha v0.3.1 (registry `ustc`)
  Downloaded tendril v0.4.3 (registry `ustc`)
  Downloaded utf-8 v0.7.6 (registry `ustc`)
  Downloaded indexmap v1.8.1 (registry `ustc`)
  Downloaded pin-utils v0.1.0 (registry `ustc`)
  Downloaded tinyvec_macros v0.1.0 (registry `ustc`)
  Downloaded html5ever v0.25.2 (registry `ustc`)
  Downloaded rand_chacha v0.2.2 (registry `ustc`)
  Downloaded futures-core v0.3.21 (registry `ustc`)
  Downloaded rand_pcg v0.2.1 (registry `ustc`)
  Downloaded parking_lot v0.12.0 (registry `ustc`)
  Downloaded unicode-bidi v0.3.7 (registry `ustc`)
  Downloaded mac v0.1.1 (registry `ustc`)
  Downloaded 106 crates (7.2 MB) in 36.00s (largest was `encoding_rs` at 1.4 MB)
   Compiling cfg-if v1.0.0
   Compiling autocfg v1.1.0
   Compiling libc v0.2.122
   Compiling proc-macro2 v1.0.37
   Compiling unicode-xid v0.2.2
   Compiling log v0.4.16
   Compiling ppv-lite86 v0.2.16
   Compiling getrandom v0.1.16
   Compiling siphasher v0.3.10
   Compiling syn v1.0.91
   Compiling memchr v2.4.1
   Compiling once_cell v1.10.0
   Compiling pkg-config v0.3.25
   Compiling pin-project-lite v0.2.8
   Compiling cc v1.0.73
   Compiling serde v1.0.136
   Compiling futures-core v0.3.21
   Compiling parking_lot_core v0.9.2
   Compiling bytes v1.1.0
   Compiling scopeguard v1.1.0
   Compiling lazy_static v1.4.0
   Compiling smallvec v1.8.0
   Compiling new_debug_unreachable v1.0.4
   Compiling itoa v1.0.1
   Compiling futures-task v0.3.21
   Compiling mac v0.1.1
   Compiling futures-util v0.3.21
   Compiling fnv v1.0.7
   Compiling foreign-types-shared v0.1.1
   Compiling openssl v0.10.38
   Compiling utf-8 v0.7.6
   Compiling precomputed-hash v0.1.1
   Compiling futures-io v0.3.21
   Compiling percent-encoding v2.1.0
   Compiling httparse v1.6.0
   Compiling futures-channel v0.3.21
   Compiling hashbrown v0.11.2
   Compiling slab v0.4.6
   Compiling tinyvec_macros v0.1.0
   Compiling pin-utils v0.1.0
   Compiling matches v0.1.9
   Compiling bitflags v1.3.2
   Compiling futures-sink v0.3.21
   Compiling native-tls v0.2.10
   Compiling openssl-probe v0.1.5
   Compiling try-lock v0.2.3
   Compiling tower-service v0.3.1
   Compiling unicode-bidi v0.3.7
   Compiling encoding_rs v0.8.31
   Compiling httpdate v1.0.2
   Compiling regex-syntax v0.6.25
   Compiling ryu v1.0.9
   Compiling mime v0.3.16
   Compiling base64 v0.13.0
   Compiling ipnet v2.4.0
   Compiling lock_api v0.4.7
   Compiling indexmap v1.8.1
   Compiling phf_shared v0.8.0
   Compiling phf_shared v0.10.0
   Compiling tracing-core v0.1.24
   Compiling futf v0.1.5
   Compiling http v0.2.6
   Compiling foreign-types v0.3.2
   Compiling openssl-sys v0.9.72
   Compiling tinyvec v1.5.1
   Compiling form_urlencoded v1.0.1
   Compiling phf v0.8.0
   Compiling tendril v0.4.3
   Compiling unicode-normalization v0.1.19
   Compiling http-body v0.4.4
   Compiling getrandom v0.2.6
   Compiling socket2 v0.4.4
   Compiling num_cpus v1.13.1
   Compiling time v0.1.43
   Compiling quote v1.0.18
   Compiling mio v0.8.2
   Compiling want v0.3.0
   Compiling aho-corasick v0.7.18
   Compiling rand_core v0.5.1
   Compiling rand_core v0.6.3
   Compiling idna v0.2.3
   Compiling serde_urlencoded v0.7.1
   Compiling parking_lot v0.12.0
   Compiling tokio v1.17.0
   Compiling rand_pcg v0.2.1
   Compiling rand_chacha v0.2.2
   Compiling regex v1.5.5
   Compiling rand_chacha v0.3.1
   Compiling url v2.2.2
   Compiling string_cache v0.8.4
   Compiling rand v0.7.3
   Compiling rand v0.8.5
   Compiling tokio-native-tls v0.3.0
   Compiling phf_generator v0.8.0
   Compiling phf_generator v0.10.0
   Compiling phf_codegen v0.8.0
   Compiling string_cache_codegen v0.5.2
   Compiling tracing-attributes v0.1.20
   Compiling html5ever v0.25.2
   Compiling markup5ever v0.10.1
   Compiling xml5ever v0.16.2
   Compiling tracing v0.1.33
   Compiling tokio-util v0.7.1
   Compiling h2 v0.3.13
   Compiling markup5ever_rcdom v0.1.0
   Compiling html2md v0.2.13
   Compiling hyper v0.14.18
   Compiling hyper-tls v0.5.0
   Compiling reqwest v0.11.10
   Compiling test_rust v0.1.0 (/rust/test_rust)
    Finished dev [unoptimized + debuginfo] target(s) in 1m 24s
     Running `target/debug/test_rust`
获取到的地址: https://www.baidu.com/
正在转换中
md放到的位置："/root/test_rust/baidu.md"

在这里插入图片描述

可以看到baidu.md放到了/root/test_rust目录下，就是现所在的目录里。
使用下边的命令查看当前目录下的文件及其结构：

tree -F .

在这里插入图片描述
发现baidu.md这个文件就在test_rust目录下。
cat baidu.md查看里边的内容：

百度一下，你就知道body{margin:0;padding:0;text-align:center;background:#fff;height:100%}html{overflow-y:auto;color:#000;overflow:-moz-scrollbars;height:100%}body,input{font-size:12px;font-family:"PingFang SC",Arial,"Microsoft YaHei",sans-serif}a{text-decoration:none}a:hover{text-decoration:underline}img{border:0;-ms-interpolation-mode:bicubic}input{font-size:100%;border:0}body,form{position:relative;z-index:0}#wrapper{height:100%}#head\_wrapper.s-ps-islite{padding-bottom:370px}#head\_wrapper.s-ps-islite .s\_form{position:relative;z-index:1}#head\_wrapper.s-ps-islite .fm{position:absolute;bottom:0}#head\_wrapper.s-ps-islite .s-p-top{position:absolute;bottom:40px;width:100%;height:181px}#head\_wrapper.s-ps-islite #s\_lg\_img{position:static;margin:33px auto 0 auto;left:50%}#form{z-index:1}.s\_form\_wrapper{height:100%}#lh{margin:16px 0 5px;word-spacing:3px}.c-font-normal{font:13px/23px Arial,sans-serif}.c-color-t{color:#222}.c-btn,.c-btn:visited{color:#333!important}.c-btn{display:inline-block;overflow:hidden;font-family:inherit;font-weight:400;text-align:center;vertical-align:middle;outline:0;border:0;height:30px;width:80px;line-height:30px;font-size:13px;border-radius:6px;padding:0;background-color:#f5f5f6;cursor:pointer}.c-btn:hover{background-color:#315efb;color:#fff!important}a.c-btn{text-decoration:none}.c-btn-mini{height:24px;width:48px;line-height:24px}.c-btn-primary,.c-btn-primary:visited{color:#fff!important}.c-btn-primary{background-color:#4e6ef2}.c-btn-primary:hover{background-color:#315efb}a:active{color:#f60}#wrapper{position:relative;min-height:100%}#head{padding-bottom:100px;text-align:center}#wrapper{min-width:1250px;height:100%;min-height:600px}#head{position:relative;padding-bottom:0;height:100%;min-height:600px}.s\_form\_wrapper{height:100%}.quickdelete-wrap{position:relative}.tools{position:absolute;right:-75px}.s-isindex-wrap{position:relative}#head\_wrapper.head\_wrapper{width:auto}#head\_wrapper{position:relative;height:40%;min-height:314px;max-height:510px;width:1000px;margin:0 auto}#head\_wrapper .s-p-top{height:60%;min-height:185px;max-height:310px;position:relative;z-index:0;text-align:center}#head\_wrapper input{outline:0;-webkit-appearance:none}#head\_wrapper .s\_btn\_wr,#head\_wrapper .s\_ipt\_wr{display:inline-block;zoom:1;background:0 0;vertical-align:top}#head\_wrapper .s\_ipt\_wr{position:relative;width:546px}#head\_wrapper .s\_btn\_wr{width:108px;height:44px;position:relative;z-index:2}#head\_wrapper .s\_ipt\_wr:hover #kw{border-color:#a7aab5}#head\_wrapper #kw{width:512px;height:16px;padding:12px 16px;font-size:16px;margin:0;vertical-align:top;outline:0;box-shadow:none;border-radius:10px 0 0 10px;border:2px solid #c4c7ce;background:#fff;color:#222;overflow:hidden;box-sizing:content-box}#head\_wrapper #kw:focus{border-color:#4e6ef2!important;opacity:1}#head\_wrapper .s\_form{width:654px;height:100%;margin:0 auto;text-align:left;z-index:100}#head\_wrapper .s\_btn{cursor:pointer;width:108px;height:44px;line-height:45px;padding:0;background:0 0;background-color:#4e6ef2;border-radius:0 10px 10px 0;font-size:17px;color:#fff;box-shadow:none;font-weight:400;border:none;outline:0}#head\_wrapper .s\_btn:hover{background-color:#4662d9}#head\_wrapper .s\_btn:active{background-color:#4662d9}#head\_wrapper .quickdelete-wrap{position:relative}#s\_top\_wrap{position:absolute;z-index:99;min-width:1000px;width:100%}.s-top-left{position:absolute;left:0;top:0;z-index:100;height:60px;padding-left:24px}.s-top-left .mnav{margin-right:31px;margin-top:19px;display:inline-block;position:relative}.s-top-left .mnav:hover .s-bri,.s-top-left a:hover{color:#315efb;text-decoration:none}.s-top-left .s-top-more-btn{padding-bottom:19px}.s-top-left .s-top-more-btn:hover .s-top-more{display:block}.s-top-right{position:absolute;right:0;top:0;z-index:100;height:60px;padding-right:24px}.s-top-right .s-top-right-text{margin-left:32px;margin-top:19px;display:inline-block;position:relative;vertical-align:top;cursor:pointer}.s-top-right .s-top-right-text:hover{color:#315efb}.s-top-right .s-top-login-btn{display:inline-block;margin-top:18px;margin-left:32px;font-size:13px}.s-top-right a:hover{text-decoration:none}#bottom\_layer{width:100%;position:fixed;z-index:302;bottom:0;left:0;height:39px;padding-top:1px;overflow:hidden;zoom:1;margin:0;line-height:39px;background:#fff}#bottom\_layer .lh{display:inline;margin-right:20px}#bottom\_layer .lh:last-child{margin-left:-2px;margin-right:0}#bottom\_layer .lh.activity{font-weight:700;text-decoration:underline}#bottom\_layer a{font-size:12px;text-decoration:none}#bottom\_layer .text-color{color:#bbb}#bottom\_layer a:hover{color:#222}#bottom\_layer .s-bottom-layer-content{text-align:center}

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