Add powershell-http template

README.md

@@ -1,2 +1,9 @@
 # powershell-http-template
 OpenFaaS HTTP template for PowerShell
+
+## Using this template
+```
+$ faas template pull https://github.com/openfaas-incubator/powershell-http-template
+$ faas new --lang powershell-http <fn-name>
+```
+

template/powershell-http/Dockerfile

@@ -0,0 +1,22 @@
+FROM microsoft/powershell:ubuntu-xenial
+
+RUN apt-get update \
+    && apt-get install -y curl \
+    && curl -sSLf https://github.com/openfaas-incubator/of-watchdog/releases/download/0.4.5/of-watchdog > /usr/bin/fwatchdog \
+    && chmod +x /usr/bin/fwatchdog \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY server.ps1 server.ps1
+
+COPY function function
+
+HEALTHCHECK --interval=1s CMD [ -e /tmp/.lock ] || exit 1
+
+ENV fprocess="pwsh ./server.ps1"
+ENV cgi_headers="true"
+ENV mode="http"
+ENV upstream_url="http://127.0.0.1:8081"
+
+EXPOSE 8080
+CMD ["fwatchdog"]

template/powershell-http/function/handler.ps1

@@ -0,0 +1,13 @@
+function Handler {
+  Param(
+  [Parameter(Mandatory=$true)]
+  [FunctionContext]$fnContext,
+  [Parameter(Mandatory=$true)]
+  [FunctionResponse]$fnResponse
+)
+
+$output = "Hello! Your input was: " + $fnContext.Body
+
+$fnResponse.Body = $output
+
+}

template/powershell-http/server.ps1

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+Add-Type -AssemblyName System.Web
+
+Class FunctionContext{
+    [string] $Method;
+    [string] $Request;
+    [string] $Body;
+    [System.Net.WebHeaderCollection] $Headers;
+    [System.Collections.Specialized.NameValueCollection] $Query;
+    [string] $Path;
+}
+
+Class FunctionResponse{
+    [string] $Body;
+    [System.Net.WebHeaderCollection] $Headers;
+    [int] $Status;
+}
+
+$listener = New-Object System.Net.HttpListener
+$listener.Prefixes.Add("http://*:8081/")
+$listener.Start()
+
+. "./function/handler.ps1"
+
+do {
+    $context = $listener.GetContext()
+    $response = $context.Response
+    $Content = ""
+
+    $reqStream = $context.Request.InputStream
+    $reqEncoding = $context.Request.ContentEncoding
+
+    $reader = [System.IO.StreamReader]::new($reqStream, $reqEncoding)
+
+    $fnContext = [FunctionContext]::new()
+    $fnContext.Body = $reader.ReadToEnd()
+    $fnContext.Headers = $context.Request.Headers
+    $fnContext.Method = $context.Request.HttpMethod
+    $fnContext.Query = $context.Request.QueryString
+    $fnContext.Path = $context.Request.Url.LocalPath
+    $fnContext.Request = $context.Request
+
+    $fnResponse = [FunctionResponse]::new()
+    $fnResponse.Headers = [System.Net.WebHeaderCollection]::new()
+    try {
+        Handler -fnContext $fnContext -fnResponse $fnResponse
+
+        $Content = [System.Text.Encoding]::UTF8.GetBytes($fnResponse.Body)
+        $response.StatusCode = $(If ($fnResponse.Status) {$fnResponse.Status} Else {200}) #default to 200 response if not set
+    }
+    catch {
+        $responseBody = $(If ($_.Exception.Message) {$_.Exception.Message} Else {$fnResponse.Body})
+        $Content = [System.Text.Encoding]::UTF8.GetBytes($responseBody)
+        $response.StatusCode = $(If ($fnResponse.Status) {$fnResponse.Status} Else {500}) #default to 500 response for exceptions
+    }
+
+    $response.Headers = $fnResponse.Headers
+    $response.ContentLength64 = $Content.Length
+    $response.OutputStream.Write($Content, 0, $Content.Length)
+    $response.Close()
+} while ($listener.IsListening)

template/powershell-http/template.yml

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+language: powershell-http
+fprocess: pwsh server.ps1