MaxCompute:NET_HOST

Syntax

STRING NET_HOST(STRING <url>)

Parameters

url: Required. The URL string to parse. This parameter must be of the STRING type.

Return value

Returns a STRING value that represents the hostname parsed from the URL.

• If the URL includes a port number, the port number is retained in the result.

• If the function cannot parse the input URL, it returns NULL.

Related parsing functions

To parse other parts of a URL, use the following functions:

• NET_PUBLIC_SUFFIX: Parses the public suffix, such as com, org, or net, from a URL.

• NET_REG_DOMAIN: Parses the registered or registrable domain name from a URL. The registrable domain name is the public suffix plus the preceding label.

Examples

SELECT input
,description
,NET_HOST(input) AS HOST
,NET_PUBLIC_SUFFIX(input) AS SUFFIX
,NET_REG_DOMAIN(input) AS DOMAIN  
FROM (
  SELECT "" AS input, "invalid input" AS description
  UNION ALL SELECT "http://abc.xyz", "standard URL"
  UNION ALL SELECT "//user:password@a.b:80/path?query",
                   "standard URL with relative scheme, port, path and query, but no public suffix"
  UNION ALL SELECT "https://[::1]:80", "standard URL with IPv6 host"
  UNION ALL SELECT "http://example.web.china", "standard URL with internationalized domain name"
  UNION ALL SELECT "    www.Example.Co.UK    ",
                   "non-standard URL with spaces, upper case letters, and without scheme"
  UNION ALL SELECT "mailto:?to=&subject=&body=", "URI rather than URL--unsupported"
);
                         

+-----------------------------------+-------------------------------------------------------------------------------+-------------------+------------+---------------+
| input                             | description                                                                   | host              | suffix     | domain        | 
+-----------------------------------+-------------------------------------------------------------------------------+-------------------+------------+---------------+
|                                   | invalid input                                                                 | NULL              | NULL       | NULL          | 
| http://abc.xyz                    | standard URL                                                                  | abc.xyz           | xyz        | abc.xyz       | 
| //user:password@a.b:80/path?query | standard URL with relative scheme, port, path and query, but no public suffix | a.b               | NULL       | NULL          | 
| https://[::1]:80                  | standard URL with IPv6 host                                                   | [::1]             | NULL       | NULL          | 
| http://example.web.china          | standard URL with internationalized domain name                               | example.web.china | china      | web.china     | 
|         www.Example.Co.UK         | non-standard URL with spaces, upper case letters, and without scheme          | www.Example.Co.UK | Co.UK      | Example.Co.UK | 
| mailto:?to=&subject=&body=        | URI rather than URL--unsupported                                              | mailto            | NULL       | NULL          | 
+-----------------------------------+-------------------------------------------------------------------------------+-------------------+------------+---------------+

Related functions

NET_HOST is a network function. For more information about network functions, see Network functions.