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试图弄清楚为什么带有awk/read的bash代码在另一台设备上不起作用

awk bash html

D S · 技术社区 · 5 月前

我试图弄清楚为什么下面的代码在另一台设备上不起作用。你知道有什么问题吗?

文件“搜索”是一个包含多个href条目的html代码:

<a class="movieTitleCat" tytul="Godzilla: KrÃ³l potworÃ³w"  id="14220" href="napisy-14220-Godzilla-KrÃ³l-potworÃ³w-(1954)"><h3>Godzilla: KrÃ³l potworÃ³w (Gojira) - 1954r. </h3></a>

脚本:

#!/bin/bash
read -r -d "" awkCode << 'SEARCHTITLEAWKEOF'
/movieTitleCat/ {
    match($0, /href="([^"]*)"/, cHref)
    printf("%s\n", (napiBase "/" cHref[1]))
}
SEARCHTITLEAWKEOF

cat /home/gato/search | awk -v napiBase="http://lalalala.com" "$awkCode"


$ bash ttt.sh 
http://lalalala.com/napisy-14220-Godzilla-KrÃ³l-potworÃ³w-(1954)
http://lalalala.com/napisy-6336-Godzilla-(1984)
http://lalalala.com/napisy-17864-Godzilla-kontra-Gigan-(1972)
http://lalalala.com/napisy-12747-PowrÃ³t-Godzilli-(1999)
http://lalalala.com/napisy-21140-Godzilla-kontra-Mothra-(1992)
http://lalalala.com/napisy-21144-Godzilla-kontra-Kosmogodzilla-(1994)
http://lalalala.com/napisy-14424-Godzilla-kontra-Megaguirus-(2000)
http://lalalala.com/napisy-11423-Godzilla-kontra-Destruktor-(1995)
http://lalalala.com/napisy-17799-Godzilla-kontra-Hedora-(1971)
http://lalalala.com/napisy-19933-Godzilla-kontra-Mechagodzilla-2-(1993)
http://lalalala.com/napisy-18110-Godzilla-kontra-Mothra-(1964)
http://lalalala.com/napisy-3389-Godzilla-kontra-Mechagodzilla-(1974)
http://lalalala.com/napisy-20161-Godzilla-Mothra-krÃ³l-Ghidora-Gigantyczne-potwory-atakujÄ-(2001)
http://lalalala.com/napisy-21282-Godzilla-kontra-Mechagodzilla-III-(2002)
http://lalalala.com/napisy-55497-Godzilla-II-KrÃ³l-potworÃ³w-(2019)

这里它在另一台设备上不起作用,href=“

bash /home/pm/tttt.sh 
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
http://lalalala.com/
bash --help
GNU bash, version 4.4.0(4)-release-(aarch64-unknown-linux-gnu)

2 回复 | 直到 5 月前

Arkadiusz Drabczyk 5 月前

你的代码在另一台设备上不起作用的原因不是 Bash的不同版本,但awk的较小实现。如果你在脚本中使用--posix参数运行awk,如下所示:

cat search | awk --posix -v napiBase="http://lalalala.com" "$awkCode"

它会说:

awk: cmd. line:2:     match($0, /href="([^"]*)"/, cHref)
awk: cmd. line:2:                                      ^ match: third argument is a gawk extension

您需要更改引用数组的AWK行:

match($0, /href="([^"]*)"/, cHref)cHref[1]))
printf("%s\n", (napiBase "/" cHref[1]))

与此:

match($0, /href="([^"]*)"/)
printf("%s\n", (napiBase "/" substr($0, RSTART + 6, RLENGTH - 7)))

Daweo 5 月前

#!/bin/bash
read -r -d "" awkCode << 'SEARCHTITLEAWKEOF'
/movieTitleCat/ {
    match($0, /href="([^"]*)"/, cHref)
    printf("%s\n", (napiBase "/" cHref[1]))
}
SEARCHTITLEAWKEOF

cat /home/gato/search | awk -v napiBase="http://lalalala.com" "$awkCode"

从 String Functions

match(string, regexp [, array])

(...)

数组参数 match() 是一个gawk扩展。(...)

所以你需要GNU AWK 以使用所述脚本。如果可用,但不是默认值,则应该足够替换

cat /home/gato/search | awk -v napiBase="http://lalalala.com" "$awkCode"

使用

cat /home/gato/search | gawk -v napiBase="http://lalalala.com" "$awkCode"

否则,您需要重新编写命令。尽管如此,请注意awk不太适合处理HTML,如果可能的话,请使用HTML感知工具从HTML文档中提取数据,例如。 hxselect