This function reads the HTTP body from the client HTTP connection and returns it as a string output. This is suitable for processing POST requests with bodies encoded differently than multipart/* and application/x-www-form-urlencoded as in SOAP requests where the POST body is encoded as text/xml).
Suppose we have the following HTTP request
POST /foo/bar.vsp HTTP/1.1 Content-Type: text/xml Content-Length: ... <document>abc</document>
The following VSP page will read the content and return an XML document back to the browser.
<?vsp declare ses any; ses := http_body_read (); http_header ('Content-Type: text/xml\r\n'); http (string_output_string (ses)); ?>