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    CredentialProvider
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  <h1>Credential provider</h1>

<div class="doc doc-object doc-module">


<a id="streampipes.client.credential_provider"></a>
  <div class="doc doc-contents first">
  
      <p>Implementation of credential providers.
A credential provider supplies the specified sort of credentials in the appropriate HTTP header format.
The headers are then used by the client to connect to StreamPipes.</p>

  
  <div class="doc doc-children">


<div class="doc doc-object doc-class">


<h2 id="streampipes.client.credential_provider.CredentialProvider" class="doc doc-heading">
          <code>CredentialProvider</code>


<a href="#streampipes.client.credential_provider.CredentialProvider" class="headerlink" title="Permanent link">&para;</a></h2>


  <div class="doc doc-contents ">
          <p class="doc doc-class-bases">
            Bases: <code><span title="abc.ABC">ABC</span></code></p>

  
      <p>Abstract implementation of a credential provider.
Must be inherited by all credential providers.</p>


  <div class="doc doc-children">


<div class="doc doc-object doc-function">


<h3 id="streampipes.client.credential_provider.CredentialProvider.make_headers" class="doc doc-heading">
<code class="highlight language-python"><span class="n">make_headers</span><span class="p">(</span><span class="n">http_headers</span><span class="o">=</span><span class="kc">None</span><span class="p">)</span></code>

<a href="#streampipes.client.credential_provider.CredentialProvider.make_headers" class="headerlink" title="Permanent link">&para;</a></h3>


  <div class="doc doc-contents ">
  
      <p>Creates the HTTP headers for the specific credential provider.</p>
<p>Concrete authentication headers must be defined in the implementation of a credential provider.</p>


  <table>
    <thead>
      <tr>
        <th><b>PARAMETER</b></th>
        <th><b> DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td><code>http_headers</code></td>
          <td class="doc-param-details">
            <div class="doc-md-description">
              <p>Additional HTTP headers the generated headers are extended by.</p>
            </div>
            <p>
                <span class="doc-param-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.Optional">Optional</span>[<span title="typing.Dict">Dict</span>[str, str]]</code>
                </span>
                <span class="doc-param-default">
                  <b>DEFAULT:</b> 
                    <code>None</code>
                </span>
            </p>
          </td>
        </tr>
    </tbody>
  </table>


  <table>
    <thead>
      <tr>
        <th><b>RETURNS</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td>
              <code>https_headers</code>
          </td>
          <td class="doc-returns-details">
            <div class="doc-md-description">
              <p>Dictionary with header information as string key-value pairs. <br>
Contains all pairs given as parameter plus the header pairs for authentication
determined by the credential provider.</p>
            </div>
              <p>
                <span class="doc-returns-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.Dict">Dict</span>[str, str]</code>
                </span>
              </p>
          </td>
        </tr>
    </tbody>
  </table>

  </div>

</div>


  </div>

  </div>

</div>

<div class="doc doc-object doc-class">


<h2 id="streampipes.client.credential_provider.StreamPipesApiKeyCredentials" class="doc doc-heading">
<code class="highlight language-python"><span class="n">StreamPipesApiKeyCredentials</span><span class="p">(</span><span class="n">username</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">api_key</span><span class="o">=</span><span class="kc">None</span><span class="p">)</span></code>

<a href="#streampipes.client.credential_provider.StreamPipesApiKeyCredentials" class="headerlink" title="Permanent link">&para;</a></h2>


  <div class="doc doc-contents ">
          <p class="doc doc-class-bases">
            Bases: <code><a class="autorefs autorefs-internal" title="streampipes.client.credential_provider.CredentialProvider" href="#streampipes.client.credential_provider.CredentialProvider">CredentialProvider</a></code></p>

  
      <p>A credential provider that allows authentication via a StreamPipes API Token.</p>
<p>The required token can be generated via the StreamPipes UI (see the description on our <a href="../../../">start-page</a>.</p>
<p>Both parameters can either be passed as arguments or remain unset.
If they are not passed, they are retrieved from environment variables:</p>
<ul>
<li><code>SP_USERNAME</code> is expected to contain the username</li>
<li><code>SP_API_KEY</code> is expected to contain the API key</li>
</ul>


  <table>
    <thead>
      <tr>
        <th><b>PARAMETER</b></th>
        <th><b> DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td><code>username</code></td>
          <td class="doc-param-details">
            <div class="doc-md-description">
              <p>The username to which the API token is granted, e.g., <code>demo-user@streampipes.apche.org</code>.<br>
If not passed, the username is retrieved from environment variable <code>SP_USERNAME</code>.</p>
            </div>
            <p>
                <span class="doc-param-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.Optional">Optional</span>[str]</code>
                </span>
                <span class="doc-param-default">
                  <b>DEFAULT:</b> 
                    <code>None</code>
                </span>
            </p>
          </td>
        </tr>
        <tr>
          <td><code>api_key</code></td>
          <td class="doc-param-details">
            <div class="doc-md-description">
              <p>The StreamPipes API key as it is displayed in the UI.<br>
If not passed, the api key is retrieved from environment variable <code>SP_API_KEY</code></p>
            </div>
            <p>
                <span class="doc-param-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.Optional">Optional</span>[str]</code>
                </span>
                <span class="doc-param-default">
                  <b>DEFAULT:</b> 
                    <code>None</code>
                </span>
            </p>
          </td>
        </tr>
    </tbody>
  </table>


<p><strong>Examples:</strong></p>
    <p>see <a class="autorefs autorefs-internal" href="../client/#streampipes.client.client.StreamPipesClient">StreamPipesClient</a></p>


  <div class="doc doc-children">


<div class="doc doc-object doc-function">


<h3 id="streampipes.client.credential_provider.StreamPipesApiKeyCredentials.from_env" class="doc doc-heading">
<code class="highlight language-python"><span class="n">from_env</span><span class="p">(</span><span class="n">username_env</span><span class="p">,</span> <span class="n">api_key_env</span><span class="p">)</span></code>
  
  <span class="doc doc-labels">
      <small class="doc doc-label doc-label-classmethod"><code>classmethod</code></small>
  </span>

<a href="#streampipes.client.credential_provider.StreamPipesApiKeyCredentials.from_env" class="headerlink" title="Permanent link">&para;</a></h3>


  <div class="doc doc-contents ">
  
      <p>DEPRECATED - use the class constructor instead</p>
<p>Returns an api key provider parameterized via environment variables.</p>


  <table>
    <thead>
      <tr>
        <th><b>PARAMETER</b></th>
        <th><b> DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td><code>username_env</code></td>
          <td class="doc-param-details">
            <div class="doc-md-description">
              <p>Name of the environment variable that contains the username</p>
            </div>
            <p>
                <span class="doc-param-annotation">
                  <b>TYPE:</b>
                    <code>str</code>
                </span>
            </p>
          </td>
        </tr>
        <tr>
          <td><code>api_key_env</code></td>
          <td class="doc-param-details">
            <div class="doc-md-description">
              <p>Name of the environment variable that contains the API key</p>
            </div>
            <p>
                <span class="doc-param-annotation">
                  <b>TYPE:</b>
                    <code>str</code>
                </span>
            </p>
          </td>
        </tr>
    </tbody>
  </table>


  <table>
    <thead>
      <tr>
        <th><b>RETURNS</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td>
              <span class="doc-returns-annotation">
                  <code><a class="autorefs autorefs-internal" title="streampipes.client.credential_provider.StreamPipesApiKeyCredentials" href="#streampipes.client.credential_provider.StreamPipesApiKeyCredentials">StreamPipesApiKeyCredentials</a></code>
              </span>
          </td>
          <td class="doc-returns-details">
            <div class="doc-md-description">
              
            </div>
          </td>
        </tr>
    </tbody>
  </table>


  <table>
    <thead>
      <tr>
        <th><b>RAISES</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
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          <td>
            <span class="doc-raises-annotation">
                <code>KeyError</code>
            </span>
          </td>
          <td class="doc-raises-details">
            <div class="doc-md-description">
              <p>If one of the environment variables is not defined</p>
            </div>
          </td>
        </tr>
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