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Class `std.socket.InternetHost`

Class for resolving IPv4 addresses.


						
				class InternetHost
				;

Consider using getAddress, parseAddress and Address methods instead of using this class directly.

Fields

Name	Type	Description
`addrList`	`uint[]`	These members are populated when one of the following functions are called successfully:
`aliases`	`string[]`	These members are populated when one of the following functions are called successfully:
`name`	`string`	These members are populated when one of the following functions are called successfully:

Methods

Name	Description
`getHostByAddr` (addr)	Resolve IPv4 address number.
`getHostByAddr` (addr)	Same as previous, but addr is an IPv4 address string in the dotted-decimal form a.b.c.d.
`getHostByName` (name)	Resolve host name.
`factory` (classname)	Create instance of class specified by the fully qualified name classname. The class must either have no constructors or have a default constructor.
`opCmp` (o)	Compare with another Object obj.
`opEquals` (o)	Test whether `this` is equal to `o`. The default implementation only compares by identity (using the `is` operator). Generally, overrides and overloads for `opEquals` should attempt to compare objects by their contents. A class will most likely want to add an overload that takes your specific type as the argument and does the content comparison. Then you can override this and forward it to your specific typed overload with a cast. Remember to check for `null` on the typed overload.
`toHash` ()	Compute hash function for Object.
`toString` ()	Convert Object to a human readable string.

Example

InternetHost ih = new InternetHost;

ih.getHostByAddr(0x7F_00_00_01);
writeln(ih.addrList[0]); // 0x7F_00_00_01
ih.getHostByAddr("127.0.0.1");
writeln(ih.addrList[0]); // 0x7F_00_00_01

if (!ih.getHostByName("www.digitalmars.com"))
    return;             // don't fail if not connected to internet

assert(ih.addrList.length);
InternetAddress ia = new InternetAddress(ih.addrList[0], InternetAddress.PORT_ANY);
assert(ih.name == "www.digitalmars.com" || ih.name == "digitalmars.com",
        ih.name);

/* The following assert randomly fails in the test suite.
 * https://issues.dlang.org/show_bug.cgi?id=22791
 * So just ignore it when it fails.
 */
//assert(ih.getHostByAddr(ih.addrList[0]));
if (ih.getHostByAddr(ih.addrList[0]))
{
    string getHostNameFromInt = ih.name.dup;

    // This randomly fails in the compiler test suite
    //assert(ih.getHostByAddr(ia.toAddrString()));

    if (ih.getHostByAddr(ia.toAddrString()))
    {
        string getHostNameFromStr = ih.name.dup;
        writeln(getHostNameFromInt); // getHostNameFromStr
    }
}

Authors

Christopher E. Miller, David Nadlinger, Vladimir Panteleev

License

Boost License 1.0.