René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Invoke-WebRequest does not support UTF-8 (СКУД)","articleBody":"@## Steps to reproduce\r\n**Assuming you have a URI that returns json and contains a non-Latin char**\r\n_My sample is a [Confluence](https://www.atlassian.com/software/confluence) wiki page which I am requesting with REST_\r\n\r\n```powershell\r\n$splatParameters = @{\r\n              Uri             = \"https://powershell.atlassian.net/wiki/rest/api/content/13009245?expand=space,version,body.storage,ancestors\u0026limit=25\"\r\n              Method          = \"GET\"\r\n              Headers         = @{\r\n  \"Accept-Charset\"                = \"utf-8\"\r\n  \"Accept\"                        = \"application/json\"\r\n  \"Content-Type\"                  = \"application/json; charset=utf-8\"\r\n  \"Authorization\"                 = \"Basic abcd\"\r\n  }\r\n              UseBasicParsing = $true\r\n              ErrorAction     = 'SilentlyContinue'\r\n          };\r\n  Set-Content -Value (Invoke-WebRequest @splatParameters).Content -Path c:\\temp\\export.txt -Encoding UTF8 -force\r\n```\r\n\r\n## Expected behavior\r\n`Invoke-WebRequest` is able to write the file with full support of the unicode chars of the source.\r\n_In this example: `Схема СКУД`_\r\n\r\n## Actual behavior\r\nThe REST call should return a json like this:\r\n```\r\n{\"id\":\"13009245\",\"type\":\"page\",\"status\":\"current\",\"title\":\"Схема СКУД\",\"space\":{....\r\n```\r\n\r\ninstead, the content of `c:\\temp\\export.txt` (see example ebove) contains:\r\n```\r\n{\"id\":\"13009245\",\"type\":\"page\",\"status\":\"current\",\"title\":\"Схема СКУД\",\"space\":{.....\r\n```\r\n\r\n\r\n## Environment data\r\n\r\n```powershell\r\nPS C:\\Program Files\\PowerShell\\6.0.0-rc\u003e $PSVersiontable\r\n\r\nName                           Value\r\n----                           -----\r\nPSVersion                      6.0.0-rc\r\nPSEdition                      Core\r\nGitCommitId                    v6.0.0-rc\r\nOS                             Microsoft Windows 10.0.15063\r\nPlatform                       Win32NT\r\nPSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}\r\nPSRemotingProtocolVersion      2.3\r\nSerializationVersion           1.1.0.1\r\nWSManStackVersion              3.0\r\n```\r\n","author":{"url":"https://github.com/lipkau","@type":"Person","name":"lipkau"},"datePublished":"2017-11-22T20:16:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/5528/PowerShell/issues/5528"}