[Tex/LaTex] hyperref url breaking

hyperrefline-breakingurls

So, in a plain document with

\usepackage{url}
\begin{document}
You can find this at \url{very-long-url}.
\end{document}

the URL will be broken down, e.g. after slashes. When however \usepackage{hyperref} is in effect, breaks are inhibited. I tried adding \usepackage{breakurl} below hyperref, and while it does break URLs again, the colorful border that hyperref added is now very faint. How could this last issue be remedied?

Best Answer

You can reset the width on the border. The needed value depends on the resolution settings of dvips. E.g. with dvips -Ppdf a value of 100 is okay, without -Ppdf you can try 5.

\documentclass[a4paper,10pt]{article}

\usepackage{hyperref}
\usepackage{breakurl}
\hypersetup{pdfborder={0 0 100}}
\textwidth=3cm
\begin{document}
\url{long/long/long/long/long/long/blub/bla/bla}
\end{document}

Related Solutions

[Tex/LaTex] Hyperref + \url: long URL with dashes won’t break

Load the url package explicitly with the hyphens option:

\usepackage[hyphens]{url}
\usepackage{hyperref}

By default, the url package does not consider hyphens as legal break points.

[Tex/LaTex] Manually breaking a long URL (in the bibliography)

Update: This question's OP himself has found a good solution between an extra \\ and a working hyperref.

With the help of the hyperref package one can write (the example is changed to an unpublished publication because there is, apparently, no journal):

@unpublished{koepke2009naturalness,
  year={2009},
  title={Naturalness in formal mathematics},
  note={\\
        \href{http://www.math.uni-bonn.de/people/koepke/Preprints/Naturalness_in_formal_mathematics.pdf}
             {\nolinkurl{http://www.math.uni-bonn.de/people/}}
        \\
        \href{http://www.math.uni-bonn.de/people/koepke/Preprints/Naturalness_in_formal_mathematics.pdf}
             {\nolinkurl{koepke/Preprints/Naturalness_in_formal_mathematics.pdf}}
       },
  author={Koepke, Peter}
}

which gives
$Output with two \hrefs$

If only one \href is used, like

  note={\\
        \href{http://www.math.uni-bonn.de/people/koepke/Preprints/Naturalness_in_formal_mathematics.pdf}
             {\nolinkurl{http://www.math.uni-bonn.de/people/}
             \\
              \nolinkurl{koepke/Preprints/Naturalness_in_formal_mathematics.pdf}
             }
       },

the link-active area spans the whole first line: $Output with one \href$

Original answer

An underfull hbox doesn't mean that there's necessarily something wrong. It is merely a warning.

Compare the bibliography entries of the following code.
The one with the extra \\ doesn't give a warning (but breaks the hyperlink, by the way), the other one does give a warning, but looks the same.

(The italic setting from the journal field did mess up the spacing either way.)

Code

\documentclass[natbib]{svmono}
\usepackage{url}
\usepackage[showframe,pass]{geometry}
\begin{filecontents}{test.bib}
@article{koepke2009naturalness,
  year={2009},
  title={Naturalness in formal mathematics},
  journal={Same Journal Name},
  note={\\\url{http://www.math.uni-bonn.de/people/koepke/Preprints/Naturalness_in_}\\\url{formal_mathematics.pdf}},
  author={Koepke, Peter}
}
@article{koepke2009naturalnessa,
  year={2009},
  title={Naturalness in formal mathematics},
  journal={Same Journal Name},
  note={\\\url{http://www.math.uni-bonn.de/people/koepke/Preprints/Naturalness_in_formal_mathematics.pdf}},
  author={Koepke, Peter}
}
\end{filecontents}
\begin{document}
\cite{*}
\bibliographystyle{harvard}
\bibliography{test}
\end{document}