Omitted blank space in multi-line VCard 3 properties
rfc2822 opened this issue · 5 comments
When parsing the example from https://tools.ietf.org/html/rfc6350#section-6.2.3:
NOTE:This fax number is operational 0800 to 1715
EST\, Mon-Fri.
(two spaces in the second line)
ez-vcard/0.9.7 seems to return the value This fax number is operational 0800 to 1715EST, Mon-Fri. (note the missing space before EST).
Is this intentional? As far as I have seen, the first " " means "continue from previous line", while the second " " should be taken into account for the property value (but I'm not an expert at that, I just noticed that parsing the example didn't return what I expect).
See also the examples in https://tools.ietf.org/html/rfc6350#section-3.2
Sorry for the delayed reply. The behavior you cited is normal. Folded lines begin with one or more white space characters. So, if a line begins with 2 spaces, then both of those spaces are removed when the line is unfolded. This can result in the removal of spaces between words, depending on how the line is folded.
Hello, thanks for your reply.
https://tools.ietf.org/html/rfc6350#section-3.2 says:
A logical line MAY be continued on the next physical line anywhere between two characters by inserting a CRLF immediately followed by a single white space character (space (U+0020) or horizontal tab (U+0009)). The folded line MUST contain at least one character. Any sequence of CRLF followed immediately by a single white space character is ignored (removed) when processing the content type.
Where do I find the info about one or more space characters?
I'm sorry I closed the issue. All this time I thought folded lines could start with multiple whitespace characters. Thanks for pointing this out! I don't know how I missed this...
Based on some sample vCard files I have, it appears that some mail clients use multiple whitespace characters to fold base64-encoded data values (this may be how I got confused). ez-vcard will need to be aware of this and correct for it.
Thanks for having a look into this.