[web/views/formrenderer] do not use `cubicweb:target` attribute on form (closes #5534074) The `cubicweb:target` is a flag indicating that the form data (with file input) shall be posted inside an iframe - this is a well known "ajax-like" workaround to post files with browsers that do not support `FormData` (a.k.a IE<10). The `cubicweb:target` was introduced when CW used the "xhtml strict" doctype. Now that CW uses the "html5" doctype, this namespaced attribute is no longer necessary and the iframe can be generated directly. Before this patch, CW inserts the `cubicweb:target` attribute in the form DOM element (server side) and `setFormsTarget()` updates the DOM with a new `<iframe>` element (client side). Now, CW inserts the `<iframe>` DOM element directly (server side), making `setFormsTarget` useless.

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from __future__ import absolute_import

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import markdown

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import logging

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log = logging.getLogger(__name__)

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def markdown_publish(context, data):

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    """publish a string formatted as MarkDown Text to HTML

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    :type context: a cubicweb application object

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    :type data: str

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    :param data: some MarkDown text

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    :rtype: unicode

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    :return:

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      the data formatted as HTML or the original data if an error occurred

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    """

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    md = markdown.Markdown()

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    try:

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        return md.convert(data)

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    except:

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        import traceback; traceback.print_exc()

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        log.exception("Error while converting Markdown to HTML")

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        return data