...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Resolve a URL reference against this base URL.
system::result< void > resolve( url_view_base const& ref);
This function attempts to resolve a URL reference ref
against this base URL in a manner similar to that of a web browser resolving
an anchor tag. This URL must satisfy the URI grammar.
In other words, it must contain a scheme. Relative references are only
usable when in the context of a base absolute URI. This process of resolving
a relative reference within the context of a base
URI is defined in detail in rfc3986 (see below). The resolution process
works as if the relative reference is appended to the base URI and the
result is normalized. Given the input base URL, this function resolves
the relative reference as if performing the following steps:
This function places the result of the resolution into this URL in place.
If an error occurs, the contents of this URL are unspecified and a result
with an system::error_code
is returned.
Abnormal hrefs where the number of ".." segments exceeds the number of segments in the base path are handled by including the unmatched ".." segments in the result, as described in Errata 4547.
url base1( "/one/two/three" ); base1.resolve( "four" ); assert( base1.buffer() == "/one/two/four" ); url base2( "http://example.com/" ) base2.resolve("/one"); assert( base2.buffer() == "http: //example.com/one" ); url base3( "http: //example.com/one" ); base3.resolve("/two"); assert( base3.buffer() == "http: //example.com/two" ); url base4( "http: //a/b/c/d;p?q" ); base4.resolve("g #s"); assert( base4.buffer() == " http: //a/b/c/g#s" );
absolute-URI = scheme ":" hier-part [ "?" query ]
Basic guarantee. Calls to allocate may throw.
An empty result
upon success, otherwise an error code if !base.has_scheme()
.
Name |
Description |
---|---|
|
The URL reference to resolve. |
5. Reference Resolution (rfc3986)