Question

我在一个文件中有一个数据集，由三列组成（IP地址，端口，域名），如下所示：

172.56.146.16 61981 r5---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.13 64576 r2---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.46 56483 ssl.gstatic.com
172.56.146.14 57054 r3---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.14 58157 r3---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.18 62666 ssl.gstatic.com
172.56.146.15 55682 r4---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.16 52234 r5---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.59 57106 ssl.gstatic.com
172.56.146.18 58897 ssl.gstatic.com
172.56.146.16 52258 r5---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.15 55694 r4---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.32 64281 ssl.gstatic.com
172.56.146.39 60581 ssl.gstatic.com
172.56.146.13 57137 r2---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.14 64763 r3---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.13 57135 r2---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.15 51318 r4---sn-uhvcpax0n5-x5ue.googlevideo.com

我在文件中也有一个密钥集，仅包含IP地址和端口：

172.56.146.15 49333
172.56.146.16 52233
172.56.146.46 56483
172.56.146.14 58928
172.56.146.16 61981
172.56.146.13 64576
172.56.146.14 58157
172.56.146.18 62666
172.56.146.15 55682
172.56.146.14 57054

现在我想逐个考虑密钥集中的所有行，将其作为我的数据集的输入，作为回报，我应该能够从每个密钥的数据集中获取域名（IP地址和端口）取自钥匙套装。）

例如，对于172.56.146.15 49333我可以得到结果＆＃34;找不到域名＃34;对于172.56.146.46 56483，我应该得到结果ssl.gstatic.com，依此类推。任何人都可以告诉我如何使用shell命令或脚本执行此操作，以便生成的输出如下（与键集中的键一一对应）：

domain not found
ssl.gstatic.com
r5---sn-uhvcpax0n5-x5ue.googlevideo.com

Answer 1

两个解决方案，都将数据文件读入数组，然后查找密钥文件中每一行的数组值。

“Pure”Bash（仅限内置插件）：

#!/bin/bash

# Declare associative array
declare -A datafile

# Read data file into associative array
while read -r ip_addr port domain; do
    datafile["$ip_addr $port"]="$domain"
done < "$1"

# Look up value for each key from key file in array
while IFS= read -r key; do
    # Use parameter expansion to print "not found" if key is not in array
    printf "%s\n" "${datafile[$key]:-domain not found}"
done < "$2"

这称为如下：

./SO.sh data keys

其中SO.sh是脚本文件的名称，data是数据文件，keys是带有密钥的文件。

awk中：

#!/usr/bin/awk -f

# Process first file, read into array
NR == FNR {
    datafile[$1, $2] = $3
    next
}

# Look up value for key
{
    if (datafile[$1, $2] == "")
        print "domain not found"
    else
        print datafile[$1, $2]
}

假设它存储在SO.awk中，则调用此方法，如下所示：

./SO.awk data keys

对于大型文件，awk解决方案的速度将提高几个数量级。

Answer 2

使用GNU bash：

#!/bin/bash

while read -r ip foo bar; do
  grep "$ip $foo" dataset
  [[ $? != 0 ]] && echo "$ip $foo domain not found"
done < keys

输出：

172.56.146.15 49333 domain not found
172.56.146.16 52233 domain not found
172.56.146.46 56483 ssl.gstatic.com
172.56.146.14 58928 domain not found
172.56.146.16 61981 r5---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.13 64576 r2---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.14 58157 r3---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.18 62666 ssl.gstatic.com
172.56.146.15 55682 r4---sn-uhvcpax0n5-x5ue.googlevideo.com
172.56.146.14 57054 r3---sn-uhvcpax0n5-x5ue.googlevideo.com

Answer 3

使用此

#!/bin/sh

while IFS='' read -r line || [[ -n "$line" ]]; do
    if grep -q -s "$line" table.txt; then
        result=($(grep -s $line table.txt))
        echo ${result[2]}
    else
        echo "domain not found"
    fi
done < "$1"

跑步：

./myscript.sh key.txt

结果：

domain not found
domain not found
ssl.gstatic.com
domain not found
r5---sn-uhvcpax0n5-x5ue.googlevideo.com
r2---sn-uhvcpax0n5-x5ue.googlevideo.com
r3---sn-uhvcpax0n5-x5ue.googlevideo.com
ssl.gstatic.com
r4---sn-uhvcpax0n5-x5ue.googlevideo.com
r3---sn-uhvcpax0n5-x5ue.googlevideo.com

根据键从表中获取所需数据

3 个答案: