How to use text/html MIME types in IJulia

Glen Hertz

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Nov 30, 2013, 5:22:12 PM11/30/13

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Hi,

I'm trying to figure out how to display text/html MIME types in IJulia. I have the following

type Foo
    a
end
function writemime(stream, ::MIME"text/html", x::Foo)
    """
  <b><blink>HTML of Foo...</blink></b>
    """  
end
println(Foo(1))
Foo(1)  # this is displayed

How do I get it to display in HTML? Also, do I need a complete html block (eg starting with <html>) or just an html fragment (as above)?

Thanks,

Glen

Keno Fischer

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Nov 30, 2013, 5:24:31 PM11/30/13

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You need to actually do the io, e.g.

function writemime(stream, ::MIME"text/html", x::Foo)

print(stream,"""

<b><blink>HTML of Foo...</blink></b>
"""

end

Other than that, I don't think println will actually go through the display system, however, the last value in the cell (i.e. the "return value" of the cell will).

Steven G. Johnson

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Nov 30, 2013, 5:56:32 PM11/30/13

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As Keno pointed out, your writemime needs to actually write the HTML data to the stream, not return it.

The print(foo) function always displays the text/plain MIME type.

If you want to display text/html, assuming you have a writemime method for text/html, you can either:

* use display(foo)
* use display("text/html", foo)
* evaluate a code cell in which foo is the last expression evaluated (and hence is the output value)

Note also that you need
import Base.writemime
before you add a new writemime method.

Glen Hertz

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Nov 30, 2013, 7:35:23 PM11/30/13

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Hi,

Thanks. Things are now working with:

type Foo
  a
end
f = Foo(1)
function Base.writemime(stream, ::MIME"text/html", x::Foo)
  println(stream, """


  <b><blink>HTML of Foo...</blink></b>
    """

  
  )
end


display(f)

HTML of Foo...

Is there a function that escapes special HTML characters (like '<')?

Glen

Steven G. Johnson

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Nov 30, 2013, 7:47:45 PM11/30/13

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On Saturday, November 30, 2013 7:35:23 PM UTC-5, Glen Hertz wrote:

Is there a function that escapes special HTML characters (like '<')?

Not that I know of.

Leah Hanson

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Dec 1, 2013, 4:17:34 PM12/1/13

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Is there a function that escapes special HTML characters (like '<')?

In the HttpCommon package, there's a function `escapeHTML` that takes care of &, <, >, and ".

-- Leah

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