Question

我有以下ps1文件（不幸的是，它必须是PowerShell，而不是更简单），运行curl请求，将其中的一部分发送到文件，然后运行一些文本替换。< / p>

$url = "https://someserver/trans="
$transaction = "1" #There are 4 transactions
$node = "node1" #There are 10 nodes

Remove-Item ATM.csv -Force

# So far so good
# Below is what I'd use as a function in bash. No sure what/how to do in PS:
#OUTPUT:

echo $transaction";"$node >> ATM.csv
curl -v -k -u user@pass $url$transaction$node | findstr "<value>" >> ATM.csv
(Get-Content ATM.csv) -replace "<value>"," " | Out-File ATM.csv
(Get-Content ATM.csv) -replace "</value>"," " | Out-File ATM.csv
(Get-Content ATM.csv) -replace " ","" | Out-File ATM.csv

脚本原样为我提供了一个事务值（csv中的三行：事务，节点和数字）。在实践中，我需要使用包含10台机器和4种不同交易的阵列或列表。

我的问题是为两个变量设置一个循环，我需要运行OUTPUT部分40次（4个事务X 10个节点）。我已经在Python中使用了similair的东西，bash但我发现自己在PowerShell中感到困惑和时间不足。我花了好几个小时在网上跑步并尝试了非工作的例子。

你能帮我一把吗？

Answer 1

我已经为你的变量添加了一个s，然后假设第一个“事务”需要在outerloop中：

$url = "https://someserver/trans="
$transactions = '1','2','3','4' #There are 4 transactions
$nodes = 'node1','node2','node3','node4','node5','node6' #There are 10 nodes

Remove-Item ATM.csv -Force

# So far so good
# Below is what I'd use as a function in bash. No sure what/how to do in PS:
#OUTPUT:
foreach($transaction in $transactions)
{
    foreach($node in $nodes)
    {
    "$transaction;$node" |out-file -Append ATM.csv
    curl -v -k -u user@pass $url$transaction$node | findstr "<value>" | out-file -Append ATM.csv
    (Get-Content ATM.csv) -replace "<value>"," " | Out-File -Append ATM.csv
    (Get-Content ATM.csv) -replace "</value>"," " | Out-File -Append ATM.csv
    (Get-Content ATM.csv) -replace " ","" | Out-File -Append ATM.csv
    }
}

Answer 2

我仍然认为处理curl输出的最佳方法是使用它返回的对象类型进行解析（html / xml / json）。

解析文本输出时，我会使用正则表达式。 PowerShell支持lookarounds所以这个脚本（具有反向节点事务顺序）：

## Q:\Test\2017\09\13\SO_46179493.ps1
$url = "https://someserver/trans="
$transactions = 1..4|ForEach-Object{"$_"}       #There are 4 transactions
$nodes = 1..10|ForEach-Object{"node{0}" -f $_}  #There are 10 nodes
$RE = [RegEx]'(?<=\<value\>).+(?=\<\/value\>)'
# The RE uses lookbehind and lookahead to assert the captured value is surrounded by
# the tags <value> and </value>

$ATM = ForEach($node in $nodes){
    ForEach($transaction in $transactions) {
      curl -v -k -u user@pass $url$transaction$node | Where-Object {$_ -match $RE}|
        ForEach-Object {[pscustomobject]@{
          node = $node
          transaction = $transaction
          value = $Matches[0]}
        }
    }
}
$ATM
$ATM | Export-Csv '.\ATM.csv' -NoTypeInformation

将生成此（模拟）显示：

node   transaction value
----   ----------- -----
node1  1           79719
node1  2           77829
node1  3           90337
node1  4           39470
...
node10 1           17294
node10 2           62468
node10 3           70542
node10 4           46147

和文件输出：

> cat .\ATM.csv
"node","transaction","value"
"node1","1","79719"
"node1","2","77829"
"node1","3","90337"
"node1","4","39470"
...
"node10","1","17294"
"node10","2","62468"
"node10","3","70542"
"node10","4","46147"

循环两个变量

2 个答案: