BibLaTeX 脚注引用缩短长 URL

Question

是否可以自动缩短脚注中的长 URL（例如缩短至 20 个字符）并在其后添加“...”？是否还可以修剪 TLD 后的 URL？

以下有两个示例：

现在引用：

Footcite 应该是（或多或少）：

这是我的 MWE：

\documentclass{scrartcl}

\usepackage[backend=biber, sorting=nyt, maxcitenames=2, maxbibnames=2, firstinits=true, isbn=false, doi=false, url=false, style=authoryear, dashed=false]{biblatex}

\renewcommand*{\multinamedelim}{\slash\space} % Delimiter should be a "/"
\appto{\biburlsetup}{\renewcommand*{\UrlFont}{\normalfont}} % show URL w/o color

\begin{filecontents}{bib_data.bib}
    @online{gs1_aisbl_epc_2016,
    title = {{{EPC Information Services}} ({{EPCIS}}) {{Standard Release}} 1.2},
    url = {https://www.gs1.org/sites/default/files/docs/epc/EPCIS-Standard-1.2-r-2016-09-29.pdf},
    urldate = {2018-03-09},
    date = {2016-09},
    author = {{GS1 AISBL}},
}
\end{filecontents}

\addbibresource{bib_data.bib}

\DeclareCiteCommand{\footciteonline}[\mkbibfootnote] 
    {\usebibmacro{prenote}}
    {\usebibmacro{citeindex}
    \printnames{author}
    (\printfield{year})
    \newunit\newblock
    \printfield{title}
    \newunit\newblock
    \usebibmacro{url+urldate}
    \newunit\newblock
    \setunit{\labelnamepunct}
}
  {\addsemicolon\space}
  {\usebibmacro{postnote}}


\begin{document}
Lorem Ipsum.\footciteonline{gs1_aisbl_epc_2016}

\printbibliography
\end{document}

感谢您的帮助。

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Answer 1

以下代码使用 Biber 的源映射，通过 RegExp 提取包含 50 个或更多字符的 URL 的 TLD。然后将 TLD 写入字段verba。\footciteonline然后设置为打印来自的缩短 URL（verba如果可用），而不是来自的长 URL url。

\documentclass{scrartcl}
\usepackage[backend=biber, style=authoryear, dashed=false, maxcitenames=2, maxbibnames=2, giveninits=true, uniquename=init, isbn=false, doi=false, url=false]{biblatex}
\usepackage{hyperref}

\renewcommand*{\multinamedelim}{\slash\space} % Delimiter should be a "/"
\appto{\biburlsetup}{\renewcommand*{\UrlFont}{\normalfont}} % show URL w/o color

\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
    @online{gs1_aisbl_epc_2016,
    title = {{{EPC Information Services}} ({{EPCIS}}) {{Standard Release}} 1.2},
    url = {https://www.gs1.org/sites/default/files/docs/epc/EPCIS-Standard-1.2-r-2016-09-29.pdf},
    urldate = {2018-03-09},
    date = {2016-09},
    author = {{GS1 AISBL}},
}
@online{Bundesamt2016,
  address     = {Wiesbaden},
  author      = {{Statistisches Bundesamt}},
  institution = {Statistisches Bundesamt},
  title       = {Bildungsstand der Bevölkerung},
  date        = {2016-11},% date ist besser als year und month
  url         = {https://www.destatis.de/GPStatistik/receive/DEHeft_heft_00057188},
}
@online{elk:bronto,
  address     = {London},
  author      = {Anne Elk},
  institution = {University of Monthy},
  title       = {On the Theory of Brontosauruses},
  date        = {1972},
  url         = {http://www.example.edu/~elk/bronto.pdf},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\DeclareCiteCommand{\footciteonline}[\mkbibfootnote] 
  {\usebibmacro{prenote}}
  {\usedriver
     {\renewbibmacro*{url}{\iffieldundef{verba}{\printfield{url}}{\printfield{verba}}}}
     {\thefield{entrytype}}}
  {\addsemicolon\space}
  {\usebibmacro{postnote}}

\DeclareSourcemap{
  \maps[datatype=bibtex]{
    \map{
      \step[fieldsource=url, match=\regexp{.{50,}}, final]
      \step[fieldset=verba, origfieldval]
      \step[fieldsource=verba, match=\regexp{\A(ht|f)tp(s)?:\/\/([^/]+).*}, replace=\regexp{$1tp$2://$3/...}]
    }
  }
}

\DeclareFieldFormat{verba}{%
  \mkbibacro{URL}\addcolon\space
  \ifhyperref
    {\href{\thefield{url}}{\nolinkurl{#1}}}
    {\nolinkurl{#1}}}

\begin{document}
Lorem\footciteonline{gs1_aisbl_epc_2016} Ipsum\footciteonline{Bundesamt2016} dolor\footciteonline{elk:bronto} sit amet.

\printbibliography
\end{document}