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true), do not try to automatically authenticate the client if a 401 (Unauthorized) status code is received.
library(http/http_digest)is also loaded.
Connectionheader. Default is
close. The alternative is
Keep-alive. This maintains a pool of available connections as determined by keep_connection/1. The
Keep-alive, Upgrade. Keep-alive connections can be closed explicitly using http_close_keep_alive/1. Keep-alive connections may significantly improve repetitive requests on the same server, especially if the IP route is long, HTTPS is used or the connection uses a proxy.
headmessage can be used in combination with the
header(Name, Value)option to access information on the resource without actually fetching the resource itself. The returned stream must be closed immediately.
post(Data) is provided, the default is
Content-Lengthin the reply header.
Major-Minor, where Major and Minor are integers representing the HTTP version in the reply header.
end. HTTP 1.1 only supports Unit =
bytes. E.g., to ask for bytes 1000-1999, use the option
true), do not automatically redirect if a 3XX code is received. Must be combined with
status_code(Code)and one of the header options to read the redirect reply. In particular, without
status_code(Code)a redirect is mapped to an exception.
POSTrequest on the HTTP server. Data is handed to http_post_data/3.
true, bypass proxy hooks. Default is
infinite. The default value is
User-Agentfield of the HTTP header. Default is
The hook http:open_options/2
can be used to provide default options based on the broken-down URL.
status_code(-Code) is particularly useful to query REST
interfaces that commonly return status codes other than
that need to be be processed by the client code.
|URL||is either an atom or string (url) or a
list of parts.
When provided, this list may contain the fields
http_open([ host('www.example.com'), path('/my/path'), search([ q='Hello world', lang=en ]) ])
error(existence_error(url, Id),Context)is raised if the HTTP result code is not in the range 200..299. Context has the shape
context(Message, status(Code, TextCode)), where Code is the numeric HTTP code and TextCode is the textual description thereof provided by the server. Message may provide additional details or may be unbound.
Two examples in which the URI is specified as a list of components, both denoting the URI `https://www.example.com/?animal=monkey`:
?- http_open([host('example.com'),scheme(https),search([animal=monkey])], Stream, ). ?- http_open([host('example.com'),query_string('animal=monkey'),scheme(https)], Stream, ).