SWI-Prolog -- http_read

Documentation
- Reference manual
- Packages
  - SWI-Prolog HTTP support
    - The HTTP client libraries
      - library(http/http_client): HTTP client library
        
        http_get/3
        
        http_delete/3
        
        http_post/4
        
        http_put/4
        
        http_patch/4
        
        http_read_data/3
        
        http_convert_data/4
        
        http_disconnect/1
        
        post_data_hook/3

Availability::- use_module(library(http/http_client)).

[det]http_read_data(+Request, -Data, +Options)

Read data from an HTTP connection and convert it according to the supplied to(Format) option or based on the Content-type in the Request. The following options are supported:

to(Format)

Convert data into Format. Values are:

stream(+WriteStream)) Append the content of the message to Stream
atom Return the reply as an atom
string Return the reply as a string
codes Return the reply as a list of codes

form_data(AsForm)

input_encoding(+Encoding)

on_filename(:CallBack)

These options are implemented by the plugin library(http/http_multipart_plugin) and apply to processing multipart/form-data content.

content_type(+Type)

Overrule the content-type that is part of Request as a work-around for wrongly configured servers.

Without plugins, this predicate handles

application/x-www-form-urlencoded: Converts form-data into a list of Name=Value terms.
application/x-prolog: Converts data into a Prolog term.

Request is a parsed HTTP request as returned by http_read_request/2 or available from the HTTP server's request dispatcher. Request must contain a term input(In) that provides the input stream from the HTTP server.