Difference between revisions of "Web Module"
m (Text replacement - "\[\[#([^]:]+:[^|]+)\|([^]:]+:[^|]+)\]\]" to "{{Function||$1}}") |
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| '''Summary''' | | '''Summary''' | ||
− | |Creates a new URL from the specified <code>$url</code> string, query string <code>$parameters</code> and an optional {{Code|$anchor}} reference. The keys and values of the map entries will be converted to strings, URL-encoded (see | + | |Creates a new URL from the specified <code>$url</code> string, query string <code>$parameters</code> and an optional {{Code|$anchor}} reference. The keys and values of the map entries will be converted to strings, URL-encoded (see {{Function||web:encode-url}}), and appended to the URL as query parameters. If a map entry has more than a single item, all of them will be appended as single parameters. |
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| '''Examples''' | | '''Examples''' | ||
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* The client will not get notified of this forwarding. | * The client will not get notified of this forwarding. | ||
* Supplied query parameters will be attached to parameters of the current request. | * Supplied query parameters will be attached to parameters of the current request. | ||
− | * The {{Code|$parameter}} argument is processed as described in | + | * The {{Code|$parameter}} argument is processed as described in {{Function||web:create-url}}. |
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| '''Examples''' | | '''Examples''' | ||
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| '''Summary''' | | '''Summary''' | ||
− | |Creates a [[RESTXQ#Forwards and Redirects|RESTXQ redirection]] to the specified {{Code|$url}}. The returned response will only work if no other items are returned by the RESTXQ function.<br/>The {{Code|$parameters}} and {{Code|$anchor}} arguments are processed as described in (see | + | |Creates a [[RESTXQ#Forwards and Redirects|RESTXQ redirection]] to the specified {{Code|$url}}. The returned response will only work if no other items are returned by the RESTXQ function.<br/>The {{Code|$parameters}} and {{Code|$anchor}} arguments are processed as described in (see {{Function||web:create-url}}). |
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| '''Examples''' | | '''Examples''' | ||
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;Version 9.3 | ;Version 9.3 | ||
− | * Added: | + | * Added: {{Function||web:error}}, {{Function||web:forward}} |
;Version 9.2 | ;Version 9.2 | ||
− | * Updated: | + | * Updated: {{Function||web:create-url}}, {{Function||web:redirect}}: third argument added. |
;Version 9.0 | ;Version 9.0 | ||
− | * Updated: | + | * Updated: {{Function||web:response-header}}: third argument added; default parameters removed. |
* Updated: error codes updated; errors now use the module namespace | * Updated: error codes updated; errors now use the module namespace | ||
;Version 8.4 | ;Version 8.4 | ||
− | * Updated: | + | * Updated: {{Function||web:response-header}}: serialization method <code>raw</code> was removed (now obsolete). |
;Version 8.2 | ;Version 8.2 | ||
− | * Added: | + | * Added: {{Function||web:encode-url}}, {{Function||web:decode-url}}. |
The module was introduced with Version 8.1. | The module was introduced with Version 8.1. |
Revision as of 19:50, 18 July 2022
This XQuery Module provides convenience functions for building web applications with RESTXQ.
Contents
Conventions
All functions and errors in this module are assigned to the http://basex.org/modules/web
namespace, which is statically bound to the web
prefix.
Functions
web:content-type
Signatures | web:content-type($path as xs:string) as xs:string |
Summary | Returns the content type of a path by analyzing its file suffix. application/octet-stream is returned if the file suffix is unknown.
|
Examples |
|
web:create-url
Signatures | web:create-url($url as xs:string, $parameters as map(*)) as xs:string web:create-url($url as xs:string, $parameters as map(*), $anchor as xs:string) as xs:string |
Summary | Creates a new URL from the specified $url string, query string $parameters and an optional $anchor reference. The keys and values of the map entries will be converted to strings, URL-encoded (see web:encode-url ), and appended to the URL as query parameters. If a map entry has more than a single item, all of them will be appended as single parameters.
|
Examples |
|
web:encode-url
Signatures | web:encode-url($string as xs:string) as xs:string |
Summary | Encodes a string to a URL. Spaces are rewritten to + ; * , - , . and _ are adopted; and all other non-ASCII characters and special characters are percent-encoded.
|
Examples |
|
web:decode-url
Signatures | web:decode-url($string as xs:string) as xs:string |
Summary | Decodes a URL to the original string. Percent-encoded characters are decoded to their UTF8 codepoints, and + characters are rewritten to spaces.
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Examples |
|
Errors | invalid : the string contains invalid XML characters.
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web:forward
Signatures | web:forward($path as xs:string) as element(rest:forward) web:forward($path as xs:string, $parameters as map(*)) as element(rest:forward)
|
Summary | Creates a server-side RESTXQ forward request to the specified $path :
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Examples |
The function call |
web:redirect
Signatures | web:redirect($url as xs:string) as element(rest:response) web:redirect($url as xs:string, $parameters as map(*)) as element(rest:response) web:redirect($url as xs:string, $parameters as map(*), $anchor as xs:string) as element(rest:response) |
Summary | Creates a RESTXQ redirection to the specified $url . The returned response will only work if no other items are returned by the RESTXQ function.The $parameters and $anchor arguments are processed as described in (see web:create-url ).
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Examples |
The query <http:response xmlns:http="http://expath.org/ns/http-client" status="302"> <http:header name="location" value="/a/b"/> </http:response> </rest:response> </syntaxhighlight> |
web:response-header
Signatures | web:response-header() as element(rest:response) web:response-header($output as map(*)?) as element(rest:response) web:response-header($output as map(*)?, $headers as map(*)?) as element(rest:response) web:response-header($output as map(*)?, $headers as map(*)?, $atts as map(*)?) as element(rest:response) |
Summary | Creates a RESTXQ response header. Serialization parameters and header values can be supplied via the
Header options can be supplied via the
|
Examples |
<syntaxhighlight lang="xml"> <rest:response xmlns:rest="http://exquery.org/ns/restxq"> <http:response xmlns:http="http://expath.org/ns/http-client"/> <output:serialization-parameters xmlns:output="http://www.w3.org/2010/xslt-xquery-serialization"/> </rest:response> </syntaxhighlight>
<syntaxhighlight lang="xquery"> web:response-header( map { 'media-type': 'application/octet-stream' }, map { 'Cache-Control': 'max-age=3600,public' }, map { 'status': 200, 'message': 'OK' } ) </syntaxhighlight>
<syntaxhighlight lang="xquery"> declare %rest:path('media/{$file}') function local:get($file) { let $path := 'path/to/' || $file return ( web:response-header(map { 'media-type': web:content-type($path) }), file:read-binary($path) ) }; </syntaxhighlight> |
web:error
Signatures | web:error($status as xs:integer, $message as xs:string) as none |
Summary | Raises an error with the QName rest:error , the specified $message and the specified $status as error value.Calls to this function are equivalent to fn:error(xs:QName('rest:error'), $message, $status) .
See RESTXQ: Raise Errors to learn how the function is helpful in web applications. |
Examples |
|
Errors | status : The supplied status code is invalid.
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Errors
Code | Description |
---|---|
invalid
|
A string contains invalid XML characters. |
status
|
The supplied status code is invalid. |
Changelog
- Version 9.3
- Added:
web:error
,web:forward
- Version 9.2
- Updated:
web:create-url
,web:redirect
: third argument added.
- Version 9.0
- Updated:
web:response-header
: third argument added; default parameters removed. - Updated: error codes updated; errors now use the module namespace
- Version 8.4
- Updated:
web:response-header
: serialization methodraw
was removed (now obsolete).
- Version 8.2
- Added:
web:encode-url
,web:decode-url
.
The module was introduced with Version 8.1.