Zip Deployment: Return Fail Deployment if Zip Deployment endpoint doe…

…sn't return success result. (#18593)

* adding check for zip deployment

* update the change log

src/Websites/Websites/ChangeLog.md

@@ -21,6 +21,7 @@
 
 ## Version 2.11.2
 * Updated `Get-AzWebApp` and `Get-AzWebAppSlot` to expose `VirtualNetworkSubnetId` property [#18042]
+* Updated `Publish-AzWebApp` to avoid the false positive result when zip deploy is not reachable. 
 ## Version 2.11.1
 * Updated 'New-AzWebAppContainerPSSession' with CmdletDeprecation Attribute [#16646]
 * Updated `Restore-AzDeletedWebApp` to fix issue that prevents the cmdlet from working on hosts with a locale is anything different from `en-US`

src/Websites/Websites/Cmdlets/WebApps/PublishAzureWebApp.cs

@@ -89,6 +89,15 @@ public override void ExecuteCmdlet()
                     fileContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/zip");
                     r = client.PostAsync(deployUrl, fileContent).Result;
 
+                    // Checking the response of the post request. If the post request fails with 502 or 503 HTTP status 
+                    // then deployments/latest endpoint may give false postive result.  
+                    if (r.StatusCode != HttpStatusCode.OK && r.StatusCode != HttpStatusCode.Accepted)
+                    {
+                        var rec = new ErrorRecord(new Exception("Deployment failed with status code " + r.StatusCode), string.Empty, ErrorCategory.InvalidResult, null);
+                        WriteError(rec);
+                        return;
+                    }
+
                     int numChecks = 0;
                     do
                     {