set_host_address

Set the host to an address

Synopsis

Description

Depending on the contents of the passed string, this function sets the host:

If the string is a valid IPv4 address, then the host is set to the address. The host type is host_type::ipv4.

If the string is a valid IPv6 address, then the host is set to that address. The host type is host_type::ipv6.

If the string is a valid IPvFuture, then the host is set to that address. The host type is host_type::ipvfuture.

Otherwise, the host name is set to the string, which may be empty. Reserved characters in the string are percent-escaped in the result. The host type is host_type::name.

In all cases, when this function returns, the URL contains an authority.

Example

assert( url( "http://www.example.com" ).set_host_address( "127.0.0.1" ).buffer() == "http://127.0.0.1" );

Postconditions

this->has_authority() == true

Complexity

Linear in `s.size()`.

Exception Safety

Strong guarantee. Calls to allocate may throw.

BNF

IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet dec-octet = DIGIT ; 0-9 / %x31-39 DIGIT ; 10-99 / "1" 2DIGIT ; 100-199 / "2" %x30-34 DIGIT ; 200-249 / "25" %x30-35 ; 250-255 IPv6address = 6( h16 ":" ) ls32 / "::" 5( h16 ":" ) ls32 / [ h16 ] "::" 4( h16 ":" ) ls32 / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32 / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32 / [ *3( h16 ":" ) h16 ] "::" h16 ":" ls32 / [ *4( h16 ":" ) h16 ] "::" ls32 / [ *5( h16 ":" ) h16 ] "::" h16 / [ *6( h16 ":" ) h16 ] "::" ls32 = ( h16 ":" h16 ) / IPv4address ; least-significant 32 bits of address h16 = 1*4HEXDIG ; 16 bits of address represented in hexadecimal IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" ) reg-name = *( unreserved / pct-encoded / "-" / ".")

Specification

IPv4 (Wikipedia)

IP Version 6 Addressing Architecture (rfc4291)

3.2.2. Host (rfc3986)