WEB SEND BLOB

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4D v20.6

WEB SEND BLOB


WEB SEND BLOB ( blob ; type )

Parameter	Type	Description
blob	BLOB	BLOB to send to the browser
type	String	Data type of the BLOB

Description

The WEB SEND BLOB command allows you to send blob to the browser.

The type of data contained in the BLOB is indicated by type. This parameter can be one of the following types:

type = Empty String (""): In this case, you don’t need to supply any more information in the BLOB. The browser will try to interpret the contents of the BLOB.
type = File extension (example: ".HTM", ".GIF", ".JPEG", etc.): In this case, you specify the MIME type of the data contained in the BLOB by indicating its extension. The BLOB will then be interpreted according to its extension. However, the extension must be a standard one so that the browser can correctly interpret it.
type = Mime/Type (example: “text/html”, “image/tiff”, etc.): In this case, you directly specify the MIME type of data contained in the BLOB. This solution offers you more freedom. Besides the standard types, you can pass a custom MIME type to send proprietary documents via Intranet. To do so, you only need to configure the browsers so that they recognize the type sent and so that they can open the appropriate application. The value you pass to type is, in this case, “application/x-[TypeName]”. In the client workstations’s browser, you reference this type and associate it to the “Launch the application” action. The WEB SEND BLOB command allows you to therefore send all types of documents, the Intranet clients automatically open the associated application.

Note: For more information about MIME types, refer to the page: http://www.iana.org/assignments/media-types.

Here is a list of the most common MIME types:

Extension	Mime/Type
.htm	text/html
.html	text/html
.shtml	text/html
.shtm	text/html
.css	text/css
.pdf	application/pdf
.rtf	application/rtf
.ps	application/postscript
.eps	application/postscript
.hqx	application/mac-binhex40
.js	application/javascript
.json	application/json
.txt	text/plain
.text	text/plain
.gif	image/gif
.jpg	image/jpeg
.jpeg	image/jpeg
.jpe	image/jpeg
.jfif	image/jpeg
.pic	image/pict
.pict	image/pict
.tif	image/tiff
.tiff	image/tiff
.mpeg	video/mpeg
.mpg	video/mpeg
.mov	video/quicktime
.moov	video/quicktime
.aif	audio/aiff
.aiff	audio/aiff
.wav	audio/wav
.ram	audio/x-pn-realaudio
.sit	application/x-stuffit
.bin	application/x-stuffit
.xml	application/xml
.z	application/x-zip
.zip	application/x-zip
.gz	application/x-gzip
.tar	application/x-tar

Note: The list of MIME types supported by the 4D HTTP server is saved in the "MimeTypes.xml" file found in the following folder of the 4D application: [Contents]\Native components\HTTPServer.bundle\Contents\Resources.

The references to 4D variables and 4DSCRIPT type tags in the page are always parsed.

Example

Refer to the example of the PICTURE TO BLOB routine.