URI (Variable type)

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Ayuda / WLanguage / Funciones WLanguage / Funciones específicas para móviles / Funciones URI

Properties specific to URI variables
Functions that use URI variables

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Funciones URI

URI (Variable type)

The URI (Uniform Resource Identifier) type identifies physical or abstract resources (e.g. files or Web pages).

There are two types of URIs:

URL (Uniform Resource Locator): identifies a resource through its means of access and location..
Examples:
- Web address: https://www.pcsoft.fr/windevmobile/index.html
- File location on disk: file:///C:/Users/johndoe/Documents/log.txt
URN (Uniform Resource Name): identify a resource by its name. They do not make it possible to locate the resource but must remain unique and persist even if the resource no longer exists or becomes unavailable.
Example: ISBN number of a book: urn:isbn:0-395-36341-1

A URI can be represented as a character string whose syntax complies with the standard defined by RFC 3986. Each URI can contain up to five parts:

<schéma>: [//<autorité>]<chemin>[? <requête>] [ # <fragment> ]

The URI scheme is a letter followed by any combination of letters, numbers, plus sign (+), period (.) or dash (-) and ends with a colon (:). In the case of a URL, it generally corresponds to the protocol to be used to access the resource: http, https, ftp, etc.
The authority of the URI is an optional part that corresponds to the identification information to access the resource. Its format is usually:
[<utilisateur>[:<mot de passe>]]hôte[:<port>]
The path is a sequence of segments separated by slashes (/). In the case of a URL on a Web page for example, it represents the path to the resource on the host.
The request is an optional part preceded by a? and followed by a set of pairs ' key=value' separated by '&'. In the case of a URL on a web page for example, it allows you to pass named parameters to the page.
The fragment is an optional part preceded by a '#' that allows providing additional information to access a secondary resource (page number, anchor of an HTML page, etc.).

Example of URI:

Note: For more details on the declaration of this type of variable and the use of WLanguage properties, see Declaring a variable.

Ejemplo

// Ouvre la fenêtre système pour la sélection d'une image 
UriRessource is URI = URISélecteur(uriImage)
IF NOT ErrorOccurred THEN
	// Chargement de la ressource
	URIToBuffer(UriRessource, ProcChargement)
	INTERNAL PROCEDURE ProcChargement(bResultat, buffer)
		IF bResultat THEN
			// Enregistrement de l'image dans la base de données
			HLinkMemo(Client, Photo, buffer)
			HModify(Client)
		END
	END
END

// Ouvre la fenêtre système pour la sélection d'une image 
URISelect(MaProcURISélecteur, uriImage)

INTERNAL PROCEDURE MaProcURISélecteur(Succès, UriRessource)
	IF Succès = True THEN
		// Chargement de la ressource
		URIToBuffer(UriRessource, ProcChargement)
		INTERNAL PROCEDURE ProcChargement(bResultat, buffer)
			IF bResultat THEN
				// Enregistrement de l'image dans la base de données
				HLinkMemo(Client, Photo, buffer)
				HModify(Client)
			END
		END
	END
END

Propiedades

Properties specific to URI variables

The following properties can be used to handle URI variables:

Property name	Type used	Effect

Authority	Character string	"Authority" part of the URI, Empty string if not specified. This property is available in read and write mode.
Fragment	Character string	Fragment of the URI, Empty string if not specified. This property is available in read and write mode.
Host	Character string	Host of the URI, Empty string if not specified. This property is available in read and write mode. Warning: If the Host property is modified: the properties User and Password are reset: these two properties must then be filled in.. the Port property is reset: the Port property must also be set.
Path	Character string	Path of the URI. This property is available in read and write mode.
Port	Integer	Port number (between 1 and 65365), 0 if not specified. This property is available in read and write mode.
Query	Character string	Query found in the URI, Empty string if not specified. This property is available in read and write mode.
Scheme	Character string	Scheme found in the URI. If changes are made, this property is mandatory and cannot be empty. This property is available in read and write mode.
User	Character string	Username. This property is available in read and write mode.
UserPassword	Character string	User password, Empty string if not specified. This property is available in read and write mode.
Value	Character string	Complete URI.

You can use VariableReset to reset the contents of a variable of type URI.

Observaciones

Functions that use URI variables

The following functions handle URI variables:


BufferToURI	Guarda el contenido de un buffer en una Resource identificada por su URI.
FileToURI	Guarda el contenido de un archivo en una Resource identificada por su URI.
URIGetInfo	Retrieves information of a URI resource.
URISelect	Abre una ventana del sistema para seleccionar una Resource de: desde el sistema de archivos de dispositivos, desde la nube (Google Drive, Microsoft OneDrive, etc.) o desde uno de los gestores de contenidos instalados en el dispositivo.
URIToBuffer	Carga en el fondo el contenido de un Resource (imagen, texto, etc.) identificado por su URI en un buffer Variable.
URIToFile	Saves, in the background, the content of a resource (image, text, etc.) identified by its URI in an external file.

Ver también

Funciones URI

Versión mínima requerida

Versión 24

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Última modificación: 20/09/2024

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