Difference between revisions of "Web DAT"

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For example, assume a table with the following contents is connected to the Web DAT:
For example, assume a table with the following contents is connected to the Web DAT:
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If the specified URL is:
If the specified URL is:

Revision as of 18:13, 4 January 2019

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The Web DAT fetches pages of data from a web connection. The data should be ASCII-readable. The Web DAT will automatically uncompress any gzip compressed page transfers. XML content is formatted into a readable indented structure, versus one long line normally sent by the server. An Info DAT can be used to obtain properties of the last page retrieved.

There are two main methods of retrieving a page from a web site using the Web DAT:

  • Fetch
  • Submit and Fetch

The Fetch method simply fetches the page from the internet using the simple protocol "GET", while the Submit and Fetch method can be used for submitting form data to a server. By default the latter method uses the "POST" protocol.

Both methods allow a DAT table input to specify options while fetching. This table should consist of rows of name/value pairs. The first column consists of the names, while the second column consists of the values. The Fetch method simply concatenates the pairs into the specified URL, while the Update and Fetch method posts the pairs to a webserver, before fetching the resulting page.

For example, assume a table with the following contents is connected to the Web DAT:

name joe
month May

If the specified URL is: http://www.example.com

Then the Fetch method will actually fetch: http://www.example.com?name=joe&month=May

Similarly, the Submit and Fetch method will post the pairs to the specified webserver, before fetching the page.

Note that spaces and other special characters in the table will be properly encoded. For example, each space in a name or value would be encoded as: %20

The first input can also be text data, in which case the data is sent to the webserver during a POST as-is, without any formatting or encoding. If the first input is text it will be ignored during a GET operation.

The 2nd input of the Web DAT can be used for custom HTTP request headers to be specified as part of the request. Like the 1st input this should be a table of name/value pairs for header field name and the value. E.g



Parameters - Page

Template:ParString Template:ParButton Template:ParMenu Template:ParButton Template:ParToggle Template:ParInteger Template:ParButton Template:ParToggle Template:ParToggle

Parameters - Common Page

Language language - - Select how the DAT decides which script language to operate on.

  • Input input - The DAT uses the inputs script language.
  • Node node - The DAT uses it's own script language.

Edit/View Extension extension - - Select the file extension this DAT should expose to external editors.

  • dat dat - various common file extensions.
  • From Language language - pick extension from DATs script language.
  • Custom Extension custom - Specify a custom extension.

Custom Extension customext - Specifiy the custom extension.

Word Wrap wordwrap - - Enable Word Wrap for Node Display.

  • Input input - The DAT uses the inputs setting.
  • On on - Turn on Word Wrap.
  • Off off - Turn off Word Wrap.

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