- Documentation
- Reference manual
- Packages
- SWI-Prolog HTTP support
- The HTTP server libraries
- The `Body'
- library(http/http_dispatch): Dispatch requests in the HTTP server
- library(http/http_dirindex): HTTP directory listings
- library(http/http_files): Serve plain files from a hierarchy
- library(http/http_session): HTTP Session management
- library(http/http_cors): Enable CORS: Cross-Origin Resource Sharing
- library(http/http_authenticate): Authenticate HTTP connections using 401 headers
- library(http/http_digest): HTTP Digest authentication
- Custom Error Pages
- library(http/http_openid): OpenID consumer and server library
- Get parameters from HTML forms
- Request format
- Running the server
- The wrapper library
- library(http/http_host): Obtain public server location
- library(http/http_log): HTTP Logging module
- Debugging HTTP servers
- library(http/http_header): Handling HTTP headers
- The library(http/html_write) library
- library(http/js_write): Utilities for including JavaScript
- library(http/http_path): Abstract specification of HTTP server locations
- library(http/html_head): Automatic inclusion of CSS and scripts links
- library(http/http_pwp): Serve PWP pages through the HTTP server
- The HTTP server libraries
- SWI-Prolog HTTP support
3.9 Custom Error Pages
It is possible to create arbitrary error pages for responses
generated when a http_reply term is thrown. Currently this is only
supported for status 403 (authentication required). To do this,
instead of throwing http_reply(authorise(Term))
throw
http_reply(authorise(Term), [], Key)
, where Key
is an arbitrary term relating to the page you want to generate. You must
then also define a clause of the multifile predicate
http:status_page_hook/3:
- http:status_page_hook(+StatusCode, +Key, -CustomHTML)
- StatusCode is the page status code (such as 401), Key is the third
argument of the http_reply exception which was thrown, and CustomHTML is
a list of HTML tokens. The default page for 401 is generated via this
code:
phrase(page([ title('401 Authorization Required') ], [ h1('Authorization Required'), p(['This server could not verify that you ', 'are authorized to access the document ', 'requested. Either you supplied the wrong ', 'credentials (e.g., bad password), or your ', 'browser doesn\'t understand how to supply ', 'the credentials required.' ]), \address ]), CustomHTML).