powershell v2 : WebClient/UploadString永不连接

Question

使用powershell v2和普什佩尔，我尝试在修改文件时发送推送通知。

$folder = 'c:\path\to\file'
$filter = '*.*'
$user = "pushbullet_token"
$url = "https://api.pushbullet.com/v2/pushes"

$fsw = New-Object IO.FileSystemWatcher $folder, $filter
$fsw.IncludeSubdirectories = $true
$fsw.NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'
$onCreated = Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -Action {

    $name = $Event.SourceEventArgs.Name
    $path = $Event.SourceEventArgs.FullPath

Out-File -FilePath c:\path\to\file\outlog.txt -Append -InputObject "$path"

    $title = $path
    Add-Type -AssemblyName System.Web
    $title = [System.Web.HttpUtility]::UrlEncode($title)
    $data =  "type=note&title=" + $title + "&body=body"

    $webclient = new-object System.Net.WebClient
    $webclient.Credentials = new-object System.Net.NetworkCredential($user, "")

Out-File -FilePath c:\path\to\file\outlog.txt -Append -InputObject "$data"

    $result = $webclient.UploadString($url, "POST", $data)

Out-File -FilePath c:\path\to\file\outlog.txt -Append -InputObject "$result"

}
#Unregister-Event FileCreated

为了检查脚本，outlog.txt文件是写的，但是只写了两个第一条消息，并且从未提交通知。

当我手动启动uploadstring时

$user = "pushbullet_token"
$url = "https://api.pushbullet.com/v2/pushes"
$data = "type=note&title=title&body=body"
$webclient = new-object System.Net.WebClient
$webclient.Credentials = new-object System.Net.NetworkCredential($user, "")
$result = $webclient.UploadString($url, "POST", $data)

工作顺利。

Answer 1

全局变量$url在事件处理程序脚本块中不可用。更改注册表-ObjectEvent，如下所示：

$onCreated = Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -MessageData $url -Action {
    $name = $Event.SourceEventArgs.Name
    $path = $Event.SourceEventArgs.FullPath
    $url  = $Event.MessageData
    ...
}

Answer 2

呼叫$webclient.UploadString(.)在事件处理程序中，抛出一个异常，该异常终止正在运行的EventJob上下文。您可以通过键入以下内容来验证：

Get-Job 

寻找失败的工作。然后，您可以对失败的作业执行接收-作业，以获得错误消息。可能是身份验证错误。通过放置有效的身份验证令牌，我能够让您的代码正常工作。

如果您想让事件处理程序继续，即使在发生错误时，也必须使用try/catch，例如：

$result = try { $webclient.UploadString($url, "POST", $data) } 
          catch { $_.Exception.InnerException.Response }