【Rust日报】2020-05-05：窥探Zoom, Lambda部署, slip等

用Rust程序和eBPF来"窥探"Zoom程序的内容。

Zooming in on Observability with Rust and eBPF

https://blog.redsift.com/labs/zooming-in-on-observability/

网络安全大神Peter Parkanyi用Rust程序和eBPF来"窥探"Zoom程序的内容。最近Zoom因为新冠病毒而大火一把，而且又因为美国政府担心Zoom的服务器绕中国一圈再回到美国引发安全顾虑又大火一把。这个博文值得关注。

一个可以部署AWSLambda服务的简易webapp

A sample webapp project which deploys on AWS Lambda

https://github.com/bachrc/rust-aws-lambda

一个可以部署AWSLambda服务的简易webapp。因为得到SilentByte的启发：https://silentbyte.com/writing-aws-lambda-functions-in-rust

学习笔记：用Rust来写编译程序

Notes on Parsing in Rust

https://blog.wesleyac.com/posts/rust-parsing

学习笔记：用Rust来写编译程序。

slip 0.1.0: 保护你程序的错误代码字符串被逆向工程获取。

slip 0.1.0: protect your error strings against reverse-engineering

https://hub.docker.com/r/michaelfbryan/mdbook-docker-image

slip 0.1.0: 保护你程序的错误代码字符串被逆向工程获取。

安装：

cargo install --path unslip

使用，直接产生秘密字符串：

unslip key

系统环境变量设置：

#### Linux$ export SLIP_KEY= #### Windows$ set SLIP_KEY=
Type-level Rust编程

Type-level Programming in Rust

http://willcrichton.net/notes/type-level-programming/

Type-level Rust编程。英文的学习笔记，大家自己欣赏哈～

Github自动编译Rust二进制代码

Github Actions to build Rust Binaries Automatically

https://github.com/zackify/flydb/blob/master/.github/workflows/build-binary.yml

Github自动编译Rust二进制代码的配置文件的一个例子：

name: Build Binarieson:  release:    types: # This configuration does not affect the page_build event above      - createdjobs:  build_for_mac:    name: MacOS    runs-on: macos-10.15    steps:      - uses: actions/checkout@master      - uses: actions-rs/cargo@v1        with:          command: build          args: --release      - name: Rename binary        run: mv target/release/flydb flydb-macos64      - name: Upload to release        env:          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}        run: |          curl \            -f \            -sSL \            -XPOST \            -H "Authorization: token $GITHUB_TOKEN" \            -H "Content-Length: $(stat -f%z flydb-macos64)" \            -H "Content-Type: application/octet-stream" \            --upload-file "flydb-macos64" \            "https://uploads.github.com/repos/$GITHUB_REPOSITORY/releases/$(jq --raw-output '.release.id' $GITHUB_EVENT_PATH)/assets?name=flydb-macos64"  build_for_pi:    name: Raspberry Pi    runs-on: ubuntu-18.04    steps:      - uses: actions/checkout@master      - uses: actions-rs/toolchain@v1        with:          toolchain: stable          target: armv7-unknown-linux-gnueabihf          override: true      - uses: actions-rs/cargo@v1        with:          use-cross: true          command: build          args: --release --target armv7-unknown-linux-gnueabihf      - name: Rename binary        run: mv target/armv7-unknown-linux-gnueabihf/release/flydb flydb-armv7-pi      - name: Upload to release        uses: JasonEtco/upload-to-release@d648f1babf776de9cad881320bd9e9818fc3b262        with:          args: flydb-armv7-pi application/octet-stream        env:          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}    build_for_android:    name: Android    runs-on: ubuntu-18.04    steps:      - uses: actions/checkout@master      - uses: actions-rs/toolchain@v1        with:          toolchain: stable          target: aarch64-linux-android          override: true      - uses: actions-rs/cargo@v1        with:          use-cross: true          command: build          args: --release --target aarch64-linux-android      - name: Rename binary        run: mv target/aarch64-linux-android/release/flydb flydb-linux-android      - name: Upload to release        uses: JasonEtco/upload-to-release@d648f1babf776de9cad881320bd9e9818fc3b262        with:          args: flydb-linux-android application/octet-stream        env:          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  build_for_linux:    name: Linux    runs-on: ubuntu-18.04    steps:      - uses: actions/checkout@master      - uses: actions-rs/cargo@v1        with:          command: build          args: --release      - name: Rename binary        run: mv target/release/flydb flydb-linux-amd64      - name: Upload to release        uses: JasonEtco/upload-to-release@d648f1babf776de9cad881320bd9e9818fc3b262        with:          args: flydb-linux-amd64 application/octet-stream        env:          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
rust语言学习笔记：理解structs

Understanding rust lang - structs notes

https://www.staszewski.me/rust-struct-notes/

波兰小伙子Kamil Staszewski 的Rust语言学习笔记。

什么是struct：

struct可以让我们创建有内容的数据结构，struct数据结构的写法有点类似Typescript语言中的interface接口， 当然很多别的编程语言的接口的实现也很类似：

struct Player {
    name: String,
    health: u32,
    mana: u32,
}

要实现一个struct我们就要给它创建一个实例，我们依照它的定义用K/V方式给它赋值：

let player1 = Player {
    name: String::from("Kamil"),
    health: 100,
    mana: 100,
};

至此，我们还不能直接用println!宏来打印出来，否则会遇到Player doesn't implement std::fmt::Display: Player cannot be formatted with the default formatte这样的错误。因为这里struct还没有实现它的trait，这就需要我们参照官方文档自己来实现一个。我们可以加这样的注释#[derive(Debug)]也可以用缺省的格式:?，或者在println!宏里面用花括号来表示缺省格式。然后我们可以试一试：

#[derive(Debug)] // annotationstruct Player {    name: String,    health: u32,    mana: u32,}
let player1 = Player {    name: String::from("Kamil"),    health: 100,    mana: 100,};
println!("Players data {:?}, player1);

怎么更新数据：

let player1 = Player {    name: String::from("Kamil"),    health: 100,    mana: 100,};
let player2 = Player {    name: String::from("Gustav"),    ..player1}; // player2 has the same health and mana values as player1

也可以直接给实例的某个键赋值，不过要记得加上mut关键字保证数据结构的实例可以更改：

let mut player1 = Player {    name: String::from("Kamil"),    health: 100,    mana: 100,};
player1.name = String::from("Some other name");

给数据结构struct添加函数（方法）：

rust语言添加函数非常方便，首先它又一个可以自引用的语法&self，这个跟JS的this和Python的self非常类似。 我们必须用impl关键字并加上数据结构的名字来'实现'实例，记住我们在函数内部用&self来应用数据机构本身：

struct Player {    name: String,    health: u32,    mana: u32,}
impl Player {    fn multiply_by(&self, n: u32) -> u32 {      self.health * n    }}
let player1 = Player {    name: String::from("Kamil"),    health: 100,    mana: 100,};
println!("Players multipied health {:?}", player1.multiply_by(3));

作者的GitHub：https://www.github.com/staszewski

From 日报小组 BobQ