PowerShell Requires Chilkat v11.0.0+

REST Follow Redirects

See more REST Examples

Demonstrates how to follow a 302/303 redirect response. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

$rest = New-Object Chilkat.Rest

$bTls = $true
$port = 443
$bAutoReconnect = $true
$success = $rest.Connect("chilkatsoft.com",$port,$bTls,$bAutoReconnect)
if ($success -eq $false) {
    $($rest.LastErrorText)
    exit
}

#  Send a POST to a URL that will respond with a 302 redirect..
$rest.AddQueryParam("firstName","John")
$rest.AddQueryParam("lastName","Doe")
$responseText = $rest.FullRequestFormUrlEncoded("POST","/echoPost302.asp")
if ($rest.LastMethodSuccess -eq $false) {
    $($rest.LastErrorText)
    exit
}

$statusCode = $rest.ResponseStatusCode

#  Examine the response status code
if ($statusCode -lt 300) {
    $("Not a redirect.")
    $($responseText)
    exit
}

if ($statusCode -gt 399) {
    $("Error response: Status code = " + $statusCode)
    $($responseText)
    exit
}

$("Redirect status code = " + $statusCode)

#  The response header will contain a Location field with the redirect URL, such as this:
#  Location: http://www.chilkatsoft.com/echoPostFinal.asp

#  The response status code determines how the client should behave.
#  Here are some common possibilities:

#  301: Moved Permanently
#  This and all future requests should be directed to the given URI.  (Keep the original HTTP method for the redirect.  In this case, the 
#  original request was a POST, so we POST to the redirect URL.)

#  302: Found (aka Object Moved aka Moved Temporarily)
#  This is the most popular redirect code, but also an example of industrial practice contradicting the standard. HTTP/1.0 specification (RFC 1945 ) required the client
#  to perform a temporary redirect (the original describing phrase was �Moved Temporarily�), but popular browsers implemented it as a 303 See Other. Therefore, HTTP/1.1
#  added status codes 303 and 307 to disambiguate between the two behaviors. However, the majority of Web applications and frameworks still use the 302 status code
#  as if it were the 303.

#  303: See Other
#  The response to the request can be found under another URI using a GET method. When received in response to a PUT, it should be assumed that the server has
#  received the data and the redirect should be issued with a separate GET message.

#  307: Temporary Redirect
#  In this occasion, the request should be repeated with another URI, but future requests can still use the original URI. In contrast to 303, the request method
#  should not be changed when reissuing the original request. For instance, a POST request must be repeated using another POST request.

$($rest.ResponseHeader)

#  Get the redirect URL
$urlStr = $rest.LastRedirectUrl
if ($rest.LastMethodSuccess -eq $false) {
    $("No Location header found for redirect.")
    exit
}

$redirectUrl = New-Object Chilkat.Url
$redirectUrl.ParseUrl($urlStr)

#  Prep for the redirect..
$rest.ClearAllParts()

#  Disconnect and re-connect.  
#  (This can be skipped if both the host and SSL/TLS conditions are the same.)
$rest.Disconnect(100)
$success = $rest.Connect($redirectUrl.Host,$redirectUrl.Port,$redirectUrl.Ssl,$bAutoReconnect)
if ($success -eq $false) {
    $($rest.LastErrorText)
    exit
}

if (($statusCode -eq 301) -or ($statusCode -eq 307)) {
    #  Redirect using a POST, sending the same params to the new destination
    $rest.AddQueryParam("firstName","John")
    $rest.AddQueryParam("lastName","Doe")
    $responseText = $rest.FullRequestFormUrlEncoded("POST",$redirectUrl.Path)
    if ($rest.LastMethodSuccess -eq $false) {
        $($rest.LastErrorText)
        exit
    }

}

if (($statusCode -eq 302) -or ($statusCode -eq 303)) {
    #  Redirect using a GET, sending the query params found in the redirect URL.
    $responseText = $rest.FullRequestFormUrlEncoded("GET",$redirectUrl.PathWithQueryParams)
    if ($rest.LastMethodSuccess -eq $false) {
        $($rest.LastErrorText)
        exit
    }

}

#  Show the final status code and the response text.
$("Final status code = " + $rest.ResponseStatusCode)

$("Final response text (HTML, XML, JSON, or whatever..)")
$($responseText)