new post: powershell-download-web-folder-contents

content/posts/2022/powershell-download-web-folder-contents/index.md

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+---
+title: "Download Web Folder Contents with Powershell (`wget -r` replacement)" # Title of the blog post.
+date: 2022-04-19T09:18:04-05:00 # Date of post creation.
+# lastmod: 2022-04-19T09:18:04-05:00 # Date when last modified
+description: "Using PowerShell to retrieve the files stored in a web directory when `wget` isn't an option." # Description used for search engine.
+featured: false # Sets if post is a featured post, making appear on the home page side bar.
+draft: false # Sets whether to render this page. Draft of true will not be rendered.
+toc: true # Controls if a table of contents should be generated for first-level links automatically.
+usePageBundles: true
+# menu: main
+# featureImage: "file.png" # Sets featured image on blog post.
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+codeLineNumbers: false # Override global value for showing of line numbers within code block.
+series: Scripts
+tags:
+  - powershell
+  - windows
+comment: true # Disable comment if false.
+---
+We've been working lately to use [HashiCorp Packer](https://www.packer.io/) to standardize and automate our VM template builds, and we found a need to pull in all of the contents of a specific directory on an internal web server. This would be pretty simple for Linux systems using `wget -r`, but we needed to find another solution for our Windows builds.
+
+A coworker and I cobbled together a quick PowerShell solution which will download the files within a specified web URL to a designated directory (without recreating the nested folder structure):
+```powershell
+$outputdir = 'C:\Scripts\Download\'
+$url = 'https://win01.lab.bowdre.net/stuff/files/'
+
+# enable TLS 1.2 and TLS 1.1 protocols
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12, [Net.SecurityProtocolType]::Tls11
+
+$WebResponse = Invoke-WebRequest -Uri $url
+# get the list of links, skip the first one ("[To Parent Directory]") and download the files
+$WebResponse.Links | Select-Object -ExpandProperty href -Skip 1 | ForEach-Object {
+    $fileName = $_.ToString().Split('/')[-1]                        # 'filename.ext'
+    $filePath = Join-Path -Path $outputdir -ChildPath $fileName     # 'C:\Scripts\Download\filename.ext'
+    $baseUrl = $url.split('/')                                      # ['https', '', 'win01.lab.bowdre.net', 'stuff', 'files']
+    $baseUrl = $baseUrl[0,2] -join '//'                             # 'https://win01.lab.bowdre.net'
+    $fileUrl  = '{0}{1}' -f $baseUrl.TrimEnd('/'), $_               # 'https://win01.lab.bowdre.net/stuff/files/filename.ext'
+    Invoke-WebRequest -Uri $fileUrl -OutFile $filePath 
+}
+```
+
+The latest version of this script will be found on [GitHub](https://github.com/jbowdre/misc-scripts/blob/main/PowerShell/Download-WebFolder.ps1).
+