Improve OPML conformance#1366
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Looking at an OPML file exported from Google Reader, it actually used both `title` and `text` attributes on both `[type=text]` and `[type=rss]` `outline` elements: https://web.archive.org/web/20150106233853/https://dl.dropboxusercontent.com/u/670189/google-reader-subscriptions.xml (obtained from https://stackoverflow.com/questions/5761771/how-do-you-extract-feed-urls-from-an-opml-file-exported-from-google-reader) This is invalid. The OPML spec only allows `title` for `[type=rss]` But Feedly emulates Google Reader and probably is not the only one, judging by the single bug report with little traffic over the years, even though it was incorrect since the initial implementation: 70d03c4 Let’s continue to use the `title` attribute for tag names as Feedly does since non-conformant producers might neglect `text`, and fall back on the mandatory `text` for conformant OPML files. Fixes: #600
Falling back to `title` attribute when `text` is not present does not make sense for valid OPML files as `text` is mandatory. Well, the attribute could still be empty but I would still call that nonsensical. Apparently, it was introduced for Netvibes, which only includes `title` and no `text`: cfc6590 Let’s look at `title` first like Feedly does.
This will come in especially handy with the next commit, which will pass along messages from the XML parser. Ideally, we would merge the import page with the rest of the APP and have React handle the escaping but we are not there yet.
… type Some operating systems might not know about OPML and return `application/octet-stream`. Let’s try to allow any MIME type first and only report wrong type when parsing fails. Fixes: #730
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textattribute for tag namestitleattribute for source names