Snobol4 语言 实战 URL 路径参数清洗实战

Snobol4阿木 发布于 10 天前 4 次阅读

Snobol4 语言实战：URL 路径参数清洗实战

Snobol4 是一种古老的编程语言，最初在1962年由David J. Farber、Ralph E. Griswold 和 Ivan P. Polonsky 设计。它以其简洁的语法和强大的字符串处理能力而闻名。尽管Snobol4 在现代编程中并不常见，但它在处理字符串和文本数据方面仍然有其独特的优势。本文将围绕Snobol4 语言，通过一个实际的案例——URL 路径参数清洗，来展示Snobol4 语言在文本处理方面的能力。

URL 路径参数清洗背景

在Web开发中，URL（统一资源定位符）是用于定位网络资源的字符串。URL 中经常包含查询参数，这些参数用于传递额外的信息。这些参数可能包含非法字符、多余的空格或者格式不正确，需要进行清洗和格式化。

Snobol4 语言简介

Snobol4 是一种基于规则的语言，它使用模式匹配和规则来处理文本。Snobol4 的语法相对简单，但功能强大，特别适合于文本处理任务。

Snobol4 语法基础

- 模式匹配：使用`?`符号来匹配任意字符。
- 规则：使用`::=`符号来定义规则，将模式与操作关联起来。
- 变量：使用`$`符号来定义变量。
- 控制结构：包括`if-then-else`、`while`等。

实战：URL 路径参数清洗

清洗目标

1. 移除URL中的非法字符。
2. 去除多余的空格。
3. 格式化参数键值对。

代码实现

以下是一个使用Snobol4 语言编写的URL路径参数清洗的示例代码：

```snobol
:clean-url
'http://example.com/path/to/resource?param1=value1&param2=value2' ->
$url
$url = [^?]?$
$url = [^&]?$
$url = [^=]?$
$url = [^ ]?$
$url = [^"]?$
$url = [^']?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url = [^()]?$
$url = [^{}]?$
$url = [^[]]?$
$url = [^]]?$
$url = [^|]?$
$url = [^/]?$
$url = [^:]?$
$url = [^@]?$
$url = [^%]?$
$url = [^]?$
$url = [^+]?$
$url = [^?]?$
$url = [^=]?$
$url = [^&]?$
$url = [^;]?$
$url = [^]?$
$url