Only one JSON file is handled at a time, no duplicates are made

We start by utilizing the powerful D3 JavaScript library for initializing data documents, followed by creating a custom JavaScript script to handle data processing.

An excerpt from the customized JavaScript script appears as follows:

   drawLegend();
   thousand_sep_format = d3.format(',');
   d3.json("http://wafi.iit.cnr.it/webvis/tmp/dbpedia/realOntology.json", function(error, root)

To be more specific, it successfully processes this particular JSON document:

   http://wafi.iit.cnr.it/webvis/tmp/dbpedia/realOntology.json

However, upon copying the original JSON file to another Linux/Ubuntu server, the duplicated version fails to be processed.

Here is the link to the copied JSON file:

   http://www.ontomatica.com/public/test/dbpedia_ontology/realOntology.json

What sets apart the original JSON file from the copied one?

How should we accurately transfer an original JSON file to a new server?

Our objective involves removing segments of the initial JSON document and then visualizing the subset. As a result, we need to host a functional subset on a server.

javascriptjson

Answer №1

When the first website responds with an Access-Control-Allow-Origin header containing the value *, it instructs browsers to allow xhr access to the site irrespective of the origin domain.

In contrast, the second site does not include this header, leading to the browser blocking content retrieval.

This issue is unrelated to the URLs themselves or the JSON data. Instead, it pertains to server configuration, and the specific changes required will vary based on the hosting environment.

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