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Solucionar Cors en Aplicaciones Genexus C#

Solucionar Manual​

  1. Modificar el web.config de la aplicación.

  2. Buscar el Nodo <system.webServer> dentro del XML.

  3. Copiar dento de <system.webServer> el siguiente código.

<httpProtocol>
    <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
    <add name="Access-Control-Allow-Methods" value="GET,PUT,POST,DELETE,OPTIONS" />
    <add name="Access-Control-Allow-Headers" value="Content-Type,Authorization" />
    </customHeaders>
</httpProtocol>
  1. Dentro de <system.webServer> <rewrite> copiar dentro de <rules> las siguientes reglas
<rule name="CORS Preflight Rest Services" stopProcessing="true">
    <match url="^rest/((?:/?[\w \.-]+)+)/?(.*)$" />
    <conditions>
    <add input="{REQUEST_METHOD}" pattern="^OPTIONS$" />
    </conditions>
    <action type="CustomResponse" statusCode="200" statusReason="Preflight" statusDescription="Preflight" />
</rule>
<rule name="CORS Preflight Anonymous Authentication" stopProcessing="true">
    <match url="^oauth/access_token$" />
    <conditions>
    <add input="{REQUEST_METHOD}" pattern="^OPTIONS$" />
    </conditions>
    <action type="CustomResponse" statusCode="200" statusReason="Preflight" statusDescription="Preflight" />
</rule>

title

Solución Automática​

Esta opción puede ser usada en CI/CD porque es un script PowerShell. Modificar la primera y ultima linea con la dirección del fichero a modificar.

$xml = [xml](Get-Content C:\inetpub\wwwroot\ICDigitalSport\web.config)
$node = $xml.SelectSingleNode("//httpRuntime")
$node.SetAttribute("maxRequestLength","100048576")
$node.SetAttribute("executionTimeout","3600")
$webserver = $xml.SelectSingleNode("//system.webServer")
$httpProtocol = $xml.CreateElement("httpProtocol")

$httpProtocol.InnerXml= '<customHeaders><add name="Access-Control-Allow-Origin" value="*" /><add name="Access-Control-Allow-Methods" value="GET,PUT,POST,DELETE,OPTIONS" /><add name="Access-Control-Allow-Headers" value="Content-Type,Authorization" /></customHeaders>'
$httpProtocol = $webserver.AppendChild($httpProtocol)

$rules = $xml.SelectSingleNode("//rules")

$rule1 = $xml.CreateElement("rule")
$rule1.SetAttribute("name","CORS Preflight Anonymous Authentication")
$rule1.SetAttribute("stopProcessing","true")
$rule1.InnerXml = '<match url="^oauth/access_token$" /><conditions><add input="{REQUEST_METHOD}" pattern="^OPTIONS$" /></conditions><action type="CustomResponse" statusCode="200" statusReason="Preflight" statusDescription="Preflight" />'
$rules.InsertBefore($rule1, $rules.FirstChild)

$rule2 = $xml.CreateElement("rule")
$rule2.SetAttribute("name","CORS Preflight Rest Services")
$rule2.SetAttribute("stopProcessing","true")
$rule2.InnerXml = '<match url="^rest/((?:/?[\w \.-]+)+)/?(.*)$" /><conditions><add input="{REQUEST_METHOD}" pattern="^OPTIONS$" /></conditions><action type="CustomResponse" statusCode="200" statusReason="Preflight" statusDescription="Preflight" />'
$rules.InsertBefore($rule2, $rules.FirstChild)

$xml.Save("C:\inetpub\wwwroot\ICDigitalSport\web.config")