# encoding: ascii
# api: powershell
# title: WebServer
# description: Just an idea for how to handle web requests in PowerShell
# version: 0.1
# type: function
# author: Joel Bennett
# license: CC0
# function: Start-WebServer
# x-poshcode-id: 6644
# x-archived: 2016-12-09T05:26:51
# x-published: 2016-12-07T18:25:00
#
#
# Simple PowerShell JSON Server:
function Start-WebServer {
param($pattern = "test")
$script:listener = New-Object System.Net.HttpListener
$script:listener.Prefixes.Add("http://+:80/${pattern}/")
$script:listener.Start()
}
function Stop-WebServer {
$script:listener.Stop()
}
function Wait-Request {
[CmdletBinding()]param()
$Context = $script:listener.GetContext()
Write-Verbose ($Context.Request.HttpMethod + " " + $Context.Request.Url)
switch($Context.Request.HttpMethod) {
"GET" {
$Context | Send-Response "POST HANDLER"
}
"POST" {
$Context | Receive-Request
$Context | Send-Response ([PSCustomObject]@{Success=$True})
}
default {
$Context.Response.OutputStream.Close()
}
}
}
# Helper functions for dealing with streams and json
function Send-Response {
param(
[Parameter(Mandatory,ValueFromPipelineByPropertyName)]
$Response,
[Parameter(Position=0)]
$Content="HELLO"
)
$Content = ConvertTo-Json $Content
$buffer = [Text.Encoding]::UTF8.GetBytes($Content)
$Response.ContentLength64 = $buffer.Length;
$Response.OutputStream.Write( $buffer, 0, $buffer.Length )
$Response.OutputStream.Close()
}
function Receive-Request {
param(
[Parameter(Mandatory,ValueFromPipelineByPropertyName)]
$Request
)
$output = ""
#$size = $script:DefaultBufferSize
#if($Request.ContentLength64 -lt $size) {
$size = $Request.ContentLength64 + 1
#}
Write-Verbose "Receiving up to $size"
$buffer = New-Object byte[] $size
do {
$count = $Request.InputStream.Read($buffer, 0, $size)
Write-Verbose "Received $count"
$output += $Request.ContentEncoding.GetString($buffer, 0, $count)
} until($count -lt $size)
$Request.InputStream.Close()
ConvertFrom-Json $output
}