source: general/prog/python-modules/requests.xml@ ab3ae35a

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect2 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 requests-download-http "https://github.com/psf/requests/releases/download/v&requests-version;/requests-&requests-version;.tar.gz">
  <!ENTITY requests-download-ftp  " ">
  <!ENTITY requests-md5sum        "796ea875cdae283529c03b9203d9c454">
  <!ENTITY requests-size          "107 KB">
  <!ENTITY requests-buildsize     "1.4 MB (add 54 MB for tests)">
  <!ENTITY requests-time          "less than 0.1 SBU (0.7 SBU for tests)">
]>

  <sect2 id="requests" xreflabel="requests-&requests-version;">

    <title>Requests-&requests-version;</title>

    <indexterm zone="requests">
      <primary sortas="a-requests">requests</primary>
    </indexterm>

    <sect3 role="package">
      <title>Introduction to Requests Module</title>

      <para>
        The <application>Requests</application> package is an elegant and
        simple HTTP library for Python, built for human beings. It allows
        sending HTTP/1.1 requests extremely easily.
      </para>

      &lfs112_checked;

      <bridgehead renderas="sect4">Package Information</bridgehead>
      <itemizedlist spacing="compact">
        <listitem>
          <para>
            Download (HTTP): <ulink url="&requests-download-http;"/>
          </para>
        </listitem>
        <listitem>
          <para>
            Download (FTP): <ulink url="&requests-download-ftp;"/>
          </para>
        </listitem>
        <listitem>
          <para>
            Download MD5 sum: &requests-md5sum;
          </para>
        </listitem>
        <listitem>
          <para>
            Download size: &requests-size;
          </para>
        </listitem>
        <listitem>
          <para>
            Estimated disk space required: &requests-buildsize;
          </para>
        </listitem>
        <listitem>
          <para>
            Estimated build time: &requests-time;
          </para>
        </listitem>
      </itemizedlist>

    <bridgehead renderas="sect3">Recommended Additional Download</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Recommended patch: <ulink
          url="&patch-root;/requests-&requests-version;-use_system_certs-1.patch"/>
        </para>
      </listitem>
    </itemizedlist>
      <bridgehead renderas="sect4">Requests Dependencies</bridgehead>

      <bridgehead renderas="sect5">Required</bridgehead>
      <para role="required">
        <xref linkend="charset-normalizer"/>,
        <xref linkend="idna"/>, and
        <xref linkend="urllib3"/>
      </para>

      <bridgehead renderas="sect5">Recommended</bridgehead>
      <para role="recommended">
        <xref linkend="make-ca"/>, with
        <xref linkend="p11-kit"/> (both needed to use system https: certificates,
        removing an unnecessary dependency on the <application>Certifi</application>
        module).
      </para>

      <bridgehead renderas="sect5">Optional</bridgehead>
      <para role="optional">
        <ulink url="https://pypi.org/project/PySocks/">PySocks</ulink> (also needed for testing)
      </para>

      <bridgehead renderas="sect5">Optional (for testing)</bridgehead>
      <para role="optional">
        <xref linkend="pytest"/>,
        <ulink url="https://pypi.org/project/Flask/">Flask</ulink>&lt;2,
        <ulink url="https://pypi.org/project/httpbin/">httpbin</ulink>,
        <ulink url="https://pypi.org/project/MarkupSafe/">MarkupSafe</ulink>&lt;2.1,
        <ulink url="https://pypi.org/project/pytest-mock/">pytest-mock</ulink>,
        <ulink url="https://pypi.org/project/pytest-httpbin/">pytest-httpbin</ulink>,
        <ulink url="https://pypi.org/project/trustme/">trustme</ulink>, and
        <ulink url="https://pypi.org/project/Werkzeug/">Werkzeug</ulink>&lt;2
      </para>

    </sect3>

    <sect3 role="installation">
      <title>Installation of Requests</title>

    <para>
      First apply a patch so that the same environment variable already used to
      point to system certificates in <application>Python3</application> following
      the installation of <application>make-ca</application> can also be used by
      this module:
    </para>

<screen><userinput>patch -Np1 -i ../requests-&requests-version;-use_system_certs-1.patch</userinput></screen>

    <para> Build the module: </para>

<screen><userinput>pip3 wheel -w dist --no-build-isolation --no-deps $PWD</userinput></screen>

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

<screen role="root"><userinput>pip3 install --no-index --find-links dist --no-cache-dir --no-user requests</userinput></screen>

    <para>
      Assuming <xref linkend="pytest"/> is installed, but the other optional
      dependencies are not, the installation can be tested with the following
      commands:
    </para>

<screen remap="test"><userinput>python3 -m venv --system-site-packages testenv &amp;&amp;
source testenv/bin/activate                    &amp;&amp;
pip3 install pytest-mock    \
             werkzeug\&lt;2    \
             flask\&lt;2       \
             pytest-httpbin \
             pysocks        \
             trustme                           &amp;&amp;
pip3 install --force-reinstall Markupsafe\&lt;2.1 &amp;&amp;
python3 /usr/bin/pytest tests                  &amp;&amp;
deactivate</userinput></screen>

    <note>
      <para>
        See <xref linkend="make-ca"/> for how to set the environment variable,
        and for how local copies of the Certifi and Requests modules installed
        in a virtual environment <emphasis>will</emphasis> override the system
        certificates.
      </para>
    </note>

    </sect3>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../../xincludes/pip3-cmd-explain.xml"/>

    <sect3 role="content">
      <title>Contents</title>

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

        <seglistitem>
          <seg>None</seg>
          <seg>None</seg>
          <seg>
            /usr/lib/python&python3-majorver;/site-packages/requests and
            /usr/lib/python&python3-majorver;/site-packages/requests-&requests-version;.dist-info
          </seg>
        </seglistitem>
      </segmentedlist>
  
    </sect3>

  </sect2>