Add LogRequestBody configuration option to make development debugging easier (#60)

* Add `LogRequestBody` configuration option to make development debugging easier

If enabled, the JSON-serialized version of the body of any REST request will
be written to verbose output, so that you can see exactly what is being sent
to GitHub.

Author: HowardWolosky

CONTRIBUTING.md

@@ -22,6 +22,7 @@ Looking for information on how to use this module?  Head on over to [README.md](
 *   [Coding Guidelines](#coding-guidelines)
 *   [Adding New Configuration Properties](#adding-new-configuration-properties)
 *   [Code Comments](#code-comments)
+*   [Debugging Tips](#debugging-tips)
 *   [Testing](#testing)
     *   [Installing Pester](#installing-pester)
     *   [Configuring Your Environment](#configuring-your-environment)
@@ -270,6 +271,17 @@ code that reads clearly while requiring minimal comments to understand what it's
 
 ----------
 
+### Debugging Tips
+
+You may find it useful to configure the module to log the body of all REST requests during
+development of a new feature, to make it easier to see exactly what is being sent to GitHub.
+
+```powershell
+Set-GitHubConfiguration -LogRequestBody
+```
+
+----------
+
 ### Testing
 [![Build status](https://ci.appveyor.com/api/projects/status/vsfq8kxo2et2dn7i?svg=true
 )](https://ci.appveyor.com/project/HowardWolosky/powershellforgithub)

GitHubConfiguration.ps1

@@ -114,6 +114,10 @@ function Set-GitHubConfiguration
         log entry.  This can be useful if you have concurrent PowerShell sessions all logging
         to the same file, as it would then be possible to filter results based on ProcessId.
 
+    .PARAMETER LogRequestBody
+        If specified, the JSON body of the REST request will be logged to verbose output.
+        This can be helpful for debugging purposes.
+
     .PARAMETER LogTimeAsUtc
         If specified, all times logged will be logged as UTC instead of the local timezone.
 
@@ -180,6 +184,8 @@ function Set-GitHubConfiguration
 
         [switch] $LogProcessId,
 
+        [switch] $LogRequestBody,
+
         [switch] $LogTimeAsUtc,
 
         [int] $RetryDelaySeconds,
@@ -262,6 +268,7 @@ function Get-GitHubConfiguration
             'DisableTelemetry',
             'LogPath',
             'LogProcessId',
+            'LogRequestBody',
             'LogTimeAsUtc',
             'RetryDelaySeconds',
             'SuppressNoTokenWarning',
@@ -593,6 +600,7 @@ function Import-GitHubConfiguration
         'defaultRepositoryName' = [String]::Empty
         'logPath' = $logPath
         'logProcessId' = $false
+        'logRequestBody' = $false
         'logTimeAsUtc' = $false
         'retryDelaySeconds' = 30
         'suppressNoTokenWarning' = $false

GitHubCore.ps1

@@ -200,6 +200,10 @@ function Invoke-GHRestMethod
                     $bodyAsBytes = [System.Text.Encoding]::UTF8.GetBytes($Body)
                     $params.Add("Body", $bodyAsBytes)
                     Write-Log -Message "Request includes a body." -Level Verbose
+                    if (Get-GitHubConfiguration -Name LogRequestBody)
+                    {
+                        Write-Log -Message $Body -Level Verbose
+                    }
                 }
 
                 [Net.ServicePointManager]::SecurityProtocol=[Net.SecurityProtocolType]::Tls12
@@ -217,7 +221,7 @@ function Invoke-GHRestMethod
             if ($PSCmdlet.ShouldProcess($jobName, "Start-Job"))
             {
                 [scriptblock]$scriptBlock = {
-                    param($Url, $Method, $Headers, $Body, $ValidBodyContainingRequestMethods, $TimeoutSec, $ScriptRootPath)
+                    param($Url, $Method, $Headers, $Body, $ValidBodyContainingRequestMethods, $TimeoutSec, $LogRequestBody, $ScriptRootPath)
 
                     # We need to "dot invoke" Helpers.ps1 and GitHubConfiguration.ps1 within
                     # the context of this script block since we're running in a different
@@ -239,6 +243,10 @@ function Invoke-GHRestMethod
                         $bodyAsBytes = [System.Text.Encoding]::UTF8.GetBytes($Body)
                         $params.Add("Body", $bodyAsBytes)
                         Write-Log -Message "Request includes a body." -Level Verbose
+                        if ($LogRequestBody)
+                        {
+                            Write-Log -Message $Body -Level Verbose
+                        }
                     }
 
                     try
@@ -272,7 +280,15 @@ function Invoke-GHRestMethod
                     }
                 }
 
-                $null = Start-Job -Name $jobName -ScriptBlock $scriptBlock -Arg @($url, $Method, $headers, $Body, $ValidBodyContainingRequestMethods, (Get-GitHubConfiguration -Name WebRequestTimeoutSec), $PSScriptRoot)
+                $null = Start-Job -Name $jobName -ScriptBlock $scriptBlock -Arg @(
+                    $url,
+                    $Method,
+                    $headers,
+                    $Body,
+                    $ValidBodyContainingRequestMethods,
+                    (Get-GitHubConfiguration -Name WebRequestTimeoutSec),
+                    (Get-GitHubConfiguration -Name LogRequestBody),
+                    $PSScriptRoot)
 
                 if ($PSCmdlet.ShouldProcess($jobName, "Wait-JobWithAnimation"))
                 {