Snobol4 语言 实战 HTML 视频路径解析实战

Snobol4^【1】 语言实战：HTML^【2】 视频路径^【3】解析实战

Snobol4 是一种古老的编程语言，最初于1962年由David J. Farber、Ralph E. Griswold 和 Ivan P. Polonsky 设计。它以其独特的文本处理^【4】能力而闻名，特别适合于文本搜索和替换等任务。本文将探讨如何使用 Snobol4 语言来解析 HTML 中的视频路径，实现视频资源的提取。

Snobol4 简介

Snobol4 是 Snobol 系列语言的第四个版本，它继承了 Snobol3 的语法和功能，并增加了一些新的特性。Snobol4 的主要特点包括：

- 强大的文本处理能力
- 灵活的模式匹配^【5】
- 高效的字符串操作^【6】
- 简洁的语法结构

HTML 视频路径解析需求

在 Web 开发中，经常需要从 HTML 文档中提取视频路径。这些视频路径通常包含在 HTML 的 `` 标签的 `src` 属性中。以下是一个简单的 HTML 示例：

html

Your browser does not support the video tag.

我们的目标是使用 Snobol4 语言编写一个程序，从上述 HTML 文档中提取视频路径 `movie.mp4`。

Snobol4 解析 HTML 视频路径

以下是使用 Snobol4 语言编写的程序，用于解析 HTML 文档中的视频路径：

```snobol
:parse-video-path
' ! Start of video tag
| ' ! Start of source tag
| ' src=" ! Start of src attribute
| ' [^"] ! Match any character except "
| ' " ! End of src attribute
| ' > ! End of source tag
| ' ! End of video tag
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
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| ' [^<] ! Skip any characters until the next tag
| ' $ ! End of input
| ' [^<] ! Skip any characters until the next tag
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