Reverted logic to upload attachments

JiraPS/Private/Resolve-FilePath.ps1

@@ -0,0 +1,35 @@
+function Resolve-FilePath {
+    <#
+    .SYNOPSIS
+        Resolve a path to it's full path
+
+    .DESCRIPTION
+        Resolve relative paths and PSDrive paths to the full path
+
+    .LINK
+        https://github.com/pester/Pester/blob/5796c95e4d6ff5528b8e14865e3f25e40f01bd65/Functions/TestResults.ps1#L13-L27
+    #>
+    [CmdletBinding()]
+    param(
+        # Path to be resolved
+        [Parameter( Mandatory, ValueFromPipeline )]
+        [ValidateNotNullOrEmpty()]
+        [Alias("PSPath", "LiteralPath")]
+        [String]
+        $Path
+    )
+
+    process {
+        $folder = Split-Path -Path $Path -Parent
+        $file = Split-Path -Path $Path -Leaf
+
+        if ( -not ([String]::IsNullOrEmpty($folder))) {
+            $folderResolved = Resolve-Path -Path $folder
+        }
+        else {
+            $folderResolved = Resolve-Path -Path $ExecutionContext.SessionState.Path.CurrentFileSystemLocation
+        }
+
+        Join-Path -Path $folderResolved.ProviderPath -ChildPath $file
+    }
+}

JiraPS/Public/Add-JiraIssueAttachment.ps1

@@ -84,15 +84,38 @@ function Add-JiraIssueAttachment {
         # Find the proper object for the Issue
         $issueObj = Resolve-JiraIssueObject -InputObject $Issue -Credential $Credential
 
-        $parameter = @{
-            URI        = $resourceURi -f $issueObj.RestURL
-            Method     = "POST"
-            Credential = $Credential
-        }
-
         foreach ($file in $FilePath) {
-            $parameter["InFile"] = $file
+            $file = Resolve-FilePath -Path $file
+
+            $enc = [System.Text.Encoding]::GetEncoding("iso-8859-1")
+            $boundary = [System.Guid]::NewGuid().ToString()
+
+            $fileName = Split-Path -Path $file -Leaf
+            $readFile = [System.IO.File]::ReadAllBytes($file)
+            $fileEnc = $enc.GetString($readFile)
+
+            $bodyLines = @'
+--{0}
+Content-Disposition: form-data; name="file"; filename="{1}"
+Content-Type: application/octet-stream
 
+{2}
+--{0}--
+'@ -f $boundary, $fileName, $fileEnc
+
+            $headers = @{
+                'X-Atlassian-Token' = 'nocheck'
+                'Content-Type'      = "multipart/form-data; boundary=`"$boundary`""
+            }
+
+            $parameter = @{
+                URI        = $resourceURi -f $issueObj.RestURL
+                Method     = "POST"
+                Body       = $bodyLines
+                Headers    = $headers
+                RawBody    = $true
+                Credential = $Credential
+            }
             Write-Debug "[$($MyInvocation.MyCommand.Name)] Invoking JiraMethod with `$parameter"
             if ($PSCmdlet.ShouldProcess($IssueObj.Key, "Adding attachment '$($fileName)'.")) {
                 $rawResult = Invoke-JiraMethod @parameter