新工具介绍：OpenResty Demo 工具链

Posted 2021-04-24 糖果的实验室

我刚用 OpenResty Demo 工具链从一个极简单的剧本文件，自动生成了一个短视频，上传到 B 站了：《OpenResty 实现的“你好世界”HTTP示例》。机器自动根据剧本自导、自演、自拍、自配音和自配中英字幕：一条命令搞定。

交易担保 哔哩哔哩 OpenResty 实现的“你好世界”HTTP示例 Mini Program

这里的终端操作全是由我们的 opslang 语言的代码来完成的，包括 vim 的自动化操作。而这里的 opslang 代码也是机器从剧本文档直接生成的。浏览器操作则是由我们的 navlang 语言代码来完成的。当然，navlang 操作复杂 web 应用的能力在这段视频里没机会展示了。等后面更多的视频哈。

这里的终端命令行操作看起来很像人做的，但实际上机器操作时极快，只不过生成视频时为了人能看清楚，故意放慢了而已，实际机器操作黑窗口时在一秒以内就完成了。

作为输入的剧本是长这个样子的哈，我放出来给大家看看： 

[V=browser-hello.mp4] Hi, I'm Matthew from OpenResty Inc. In this video, I'll demonstrate how to implement a "hello world" HTTP interface using OpenResty.
First of all, we make sure we are using OpenResty's nginx.
 [delay=0] $ export PATH=/usr/local/openresty/nginx/sbin:$PATH $ which nginx
[S] It's usually in this path.
And then we go to the home directory.
 $ cd ~/
Create and switch to a directory named 'hello' for our example.
 $ mkdir hello $ cd hello
Create the boilerplate sub-directories for the OpenResty application.
 $ mkdir logs conf $ ls
Then let's create a simple nginx.conf file under the 'conf' sub-directory. Here we use vim.
 vim conf/nginx.conf
Let's enable a single nginx worker process for simplicity.
 i [NONL] worker_processes 1; [NOP]
We enable at most 1024 per-worker connections.
 events { worker_connections 1024; } [NOP]
And here we configure an HTTP server.
 http { server {
Listen to the 8080 port with 'reuseport' enabled.
 listen 8080 reuseport; [NOP]
Finally we add a root location to this server.
 location / {
We set the default MIME type to text/plain.
 default_type text/plain;
We embed some Lua code to emit a response with the body 'Hello World'.
 content_by_lua_block { ngx.say("Hello World") } } } }
The file is now complete. Let's save it.
 [ESC] :w
Quit the vim editor.
 :q $
Now let's test if the configuration is correct with the '-t' option.
 $ nginx -p $PWD/ -t
[S] Looking good!
Now let's start this OpenResty application for real.
 $ nginx -p $PWD/
And check if the nginx processes are running.
 $ ps aux|grep nginx|grep -v /tmp/
[S] Nice. They are up. One master and one worker.
We can now send a test HTTP request to this server with the 'curl' command-line utility.
 $ curl 'http://127.0.0.1:8080/'
[S] We're indeed getting the response body 'Hello World'.
[V=browser-hello.mp4] We can also try accessing the / URI in a web browser.
[S] As we can see, it also displays "Hello World" as expected.
[S] If you like this video, please subscribe to our channel. Thank you!

这个输入文件是 .sp  后缀，即英文单词 screenplay 的缩写，表示"剧本“。这个语言的名字叫 screenplay，是一种类似自然语言的小语言。这个剧本里引用的 browser-hello.mp4 视频则是由 navlang 生成的。

从同样的剧本文件，OpenResty Demo 工具链也能自动生成图文并茂的文字版教程，我刚发表在我们的官方博客网站上面了。这是中文版：《使用 OpenResty 实现”你好世界” HTTP 示例》，而这是英文版：《Hello World HTTP Example in OpenResty》。多语言翻译也是机器自动完成的。文中的插图也自动取自 mp4 视频文件。工具链此时生成的是 markdown 文件。

这个 OpenResty Demo 工具链产品也只会提供给我们 OpenResty Inc. 公司的商业客户了哈。我们会继续免费分享工具链生成的更多视频和文章。