source: networking/netlibs/curl.xml@ 355495ce

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY curl-download-http "http://curl.haxx.se/download/curl-&curl-version;.tar.bz2">
  <!ENTITY curl-download-ftp  " ">
  <!ENTITY curl-md5sum        "bfa80f01b3d300359cfb4d409b6136a3">
  <!ENTITY curl-size          "2.4 MB">
  <!ENTITY curl-buildsize     "28 MB">
  <!ENTITY curl-time          "0.5 SBU">
]>

<sect1 id="curl" xreflabel="cURL-&curl-version;">
  <?dbhtml filename="curl.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>cURL-&curl-version;</title>

  <indexterm zone="curl">
    <primary sortas="a-cURL">cURL</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to cURL</title>

    <para>
      The <application>cURL</application> package contains
      <command>curl</command> and its support library
      <filename class="libraryfile">libcurl</filename>. This is useful for
      transferring files with URL syntax to any of the following protocols:
      FTP, FTPS, HTTP, HTTPS, SCP, SFTP, TFTP, TELNET, DICT, LDAP, LDAPS
      and FILE.  This ability to both download and upload files can be
      incorporated into other programs to support functions like streaming
      media.
    </para>

    &lfs71_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&curl-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&curl-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &curl-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &curl-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &curl-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &curl-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">cURL Dependencies</bridgehead>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="cacerts"/> and
      <xref linkend="openssl"/> or <xref linkend="gnutls"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <ulink url="http://daniel.haxx.se/projects/c-ares/">c-ares</ulink>,
      <ulink url="http://www.pdc.kth.se/kth-krb/">krb4</ulink>,
      <xref linkend="libidn"/>,
      <ulink url="http://www.libssh2.org">libssh2</ulink>,
      <xref linkend="mitkrb"/>,
      <xref linkend="openldap"/> and
      <ulink url="http://www.vintela.com/resources/topics/spnego/">
      SPNEGO</ulink>
    </para>

    <bridgehead renderas="sect4">Optional for Running the Test Suite</bridgehead>
    <para role="optional">
      <xref linkend="stunnel"/> (for the HTTPS and FTPS tests)
    </para>

    <para condition="html" role="usernotes">User Notes:
      <ulink url="&blfs-wiki;/curl"/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of cURL</title>

    <para>
      Install <application>cURL</application> by running the following
      commands:
    </para>

<screen><userinput>sed -i '/--static-libs)/{N;s#echo .*#echo #;}' curl-config.in &amp;&amp;
./configure --prefix=/usr --disable-static --with-ca-path=/etc/ssl/certs &amp;&amp;
make</userinput></screen>

    <para>
      To test the results, issue: <command>make check</command>. Note that
      if you have <application>Stunnel</application> and
      <application>TCP Wrapper</application> installed and you wish to perform
      the HTTPS tests, you'll need to have an unrestrictive
      <filename>/etc/hosts.deny</filename> file.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem>
      user:
    </para>

<screen role="root"><userinput>make install &amp;&amp;
find docs \( -name "Makefile*" -o -name "*.1" -o -name "*.3" \) -exec rm {} \; &amp;&amp;
install -v -d -m755 /usr/share/doc/curl-&curl-version; &amp;&amp;
cp -v -R docs/*     /usr/share/doc/curl-&curl-version;</userinput></screen>
  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/static-libraries.xml"/>

    <para>
      <command>sed -i '/--static-libs)/{N;s#echo .*#echo #;}'
      curl-config.in</command>: As we've not installed the static libraries,
      this sed removes the static libs line from curl-config as it might
      otherwise confuse other applications<!--such as pycurl-->.
    </para>

    <para>
      <parameter>--with-ca-path=/etc/ssl/certs</parameter>: This parameter
      sets the directory to use as the path to the SSL certificates.
      If you've not installed <xref linkend="openssl"/> or
      <xref linkend="gnutls"/> and the <xref linkend="cacerts"/> you can
      remove this option.
    </para>

    <para>
      <option>--with-gssapi</option>: This parameter adds
      <application>Kerberos 5</application> support to
      <filename class="libraryfile">libcurl</filename>.
    </para>

    <para>
      <option>--with-libssh2</option>: This parameter adds
      SSH2 protocol support to
      <filename class="libraryfile">libcurl</filename>.
    </para>

    <para>
      <option>--without-ssl --with-gnutls</option>: Use to
      build with <application>GnuTLS</application> support
      instead of <application>OpenSSL</application> for SSL/TLS.
    </para>

    <para>
      <command>find docs \( -name "Makefile*" -o -name "*.1" -o -name "*.3"
      \) -exec rm {} \;</command>: This command removes
      <filename>Makefiles</filename> and man files from the documentation
      directory that would otherwise be installed by the commands that
      follow.
    </para>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
           curl and curl-config
        </seg>
        <seg>
           libcurl.so
        </seg>
        <seg>
          /usr/include/curl and
          /usr/share/doc/curl-&curl-version;
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="curl-prog">
        <term><command>curl</command></term>
        <listitem>
         <para>
           is a command line tool for transferring files with URL syntax.
         </para>
          <indexterm zone="curl curl-prog">
            <primary sortas="b-curl">curl</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="curl-config">
        <term><command>curl-config</command></term>
        <listitem>
          <para>
            prints information about the last compile, like libraries
            linked to and prefix setting.
          </para>
          <indexterm zone="curl curl-config">
            <primary sortas="b-curl-config">curl-config</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libcurl">
        <term><filename class="libraryfile">libcurl.so</filename></term>
        <listitem>
          <para>
            provides the API functions required by
            <command>curl</command> and other programs.
          </para>
          <indexterm zone="curl libcurl">
            <primary sortas="c-libcurl">libcurl.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>