{ $error-description "Thrown by " { $link http-request } " if the server returns a status code other than 200. The " { $slot "response" } " and " { $slot "body" } " slots can be inspected for the underlying cause of the problem." } ;
HELP:too-many-redirects
{ $error-description "Thrown by " { $link http-request } " if the server returns a chain of than " { $link max-redirects } " redirections." } ;
{ $description "Sends an HTTP request to an HTTP server, and reads the response incrementally. Chunks of data are passed to the quotation as they are read." }
{ $errors "Throws an error if the HTTP request fails." } ;
"The " { $link http-get } " and " { $link http-request } " words output sequences. This is undesirable if the response data may be large. Another pair of words take a quotation instead, and pass the quotation chunks of data incrementally:"
{ "a " { $link byte-array } ": the data is sent the server without further encoding" }
{ "a " { $link string } ": the data is encoded and then sent as a series of bytes" }
{ "an " { $link assoc } ": the assoc is interpreted as a series of form parameters, which are encoded with " { $link assoc>query } }
{ "an input stream: the contents of the input stream are transmitted to the server without being read entirely into memory - this is useful for large requests" }
{ "a " { $link post-data } " tuple, for additional control" }
}
"When passing a stream, you must ensure the stream is closed afterwards. The best way is to use " { $link with-disposal } " or " { $link "destructors" } ". For example,"
ARTICLE: "http.client.encoding""Character encodings and the HTTP client"
"The " { $link http-request } ", " { $link http-get } " and " { $link http-post } " words output a sequence containing data that was sent by the server."
$nl
"If the server specifies a " { $snippet "content-type" } " header with a character encoding, the HTTP client decodes the data using this character encoding, and the sequence will be a string."
$nl
"If no encoding was specified but the MIME type is a text type, the " { $link latin1 } " encoding is assumed, and the sequence will be a string."
$nl
"For any other MIME type, the " { $link binary } " encoding is assumed, and thus the data is returned literally in a byte array.";
ARTICLE: "http.client.errors""HTTP client errors"
"HTTP operations may fail for one of two reasons. The first is an I/O error resulting from a network problem; a name server lookup failure, or a refused connection. The second is a protocol-level error returned by the server. There are two such errors:"
{ $subsection download-failed }
{ $subsection too-many-redirects } ;
ARTICLE: "http.client""HTTP client"
"The " { $vocab-link "http.client" } " vocabulary implements an HTTP and HTTPS client on top of " { $link "http" } "."
"For HTTPS support, you must load the " { $vocab-link "urls.secure" } " vocab first. If you don't need HTTPS support, don't load " { $vocab-link "urls.secure" } "; this will reduce the size of images generated by " { $vocab-link "tools.deploy" } "."
"More esoteric use-cases, for example HTTP methods other than the above, are accomodated by constructing an empty request object with " { $link <request> } " and filling everything in by hand."
