ben
/
bitshift
镜像来自 https://github.com/earwig/bitshift


			
				
					
						
						
							
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  docs
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  <a id="logo" href="/">
    <div id="logo">
      <span id="logo-bit">bit</span
      ><span id="logo-angle">&laquo;</span
      ><span id="logo-shift">shift</span>
    </div>
  </a>

  <ul>
    <li>
      <h1><span>&raquo;</span> Usage</h1>
      <p>
        <span class="title">bitshift</span> is a search-engine optimized for
        source code: beyond supporting searches with the full range of ASCII
        symbols, the engine <em>understands</em> code, allowing users to query
        for metadata, like time of creation/last modification, programming
        language, and even symbols like function names and variables. Basic use
        boils down to general and advanced searches.

        <ul>
          <li>
            <h2>general search</h2>
            <p>
              To perform a "general search," simply place your cursor in the
              search bar on our home page and begin entering text; when you
              stop typing for a short period of time, we'll automatically
              execute the query for you. As you scroll down the page, new
              codelets, or results, will be seamlessly downloaded from our
              server and appended to the end.
            </p>
          </li>

          <li>
            <h2>advanced search</h2>
            <p>
              General searches, though, are limited. To allow users to make the
              best of our engine, we created an advanced search form that
              allows the creation of complex queries with the following
              specifiers:

              <ul>
                <li>
                  <h3>search fields</h3>
                  <ul id="search-fields">
                    <li>
                      <span class="code">languages</span> : The programming
                      languages to search for.
                    </li>
                    <li>
                      <span class="code">authors</span> : Search for code
                      written/modified by a specific person.
                    </li>
                    <li>
                      <span class="code">date last modified</span> : Search for
                      code last modified on a specific date
                      (<span class="code">mm/dd/yy</span> format).
                    </li>
                    <li>
                      <span class="code">date created</span> : Search for code
                      created on a specific date
                      (<span class="code">mm/dd/yy</span> format).
                    </li>
                    <li>
                      <span class="code">symbols</span> : Search for specific
                      symbols.
                    </li>
                    <li>
                      <span class="code">functions</span> : Search for
                      functions with specific names.
                    </li>
                    <li>
                      <span class="code">classes</span> : Search for classes
                      with specific names.
                    </li>
                    <li>
                      <span class="code">variables</span> : Search for
                      variables with specific names.
                    </li>
                  </ul>

                  <p>
                    Each of the search fields allows for numerous values; just
                    separate them with spaces. If you'd like to search for a
                    multi-word, space-delimited string, on the other hand,
                    enclose it in double quotes.

                    A query for <span class="code">foo bar</span> will search
                    for occurrences of both <span id="string">"foo"</span> and
                    <span class="string">"bar"</span>, while
                    <span class="code">"foo bar"</span> will search for
                    occurrences of <span class="string">"foo bar"</span>.
                  </p>
                </li>

                <li>
                  <h3>search groups</h3>
                  <p>
                    Search groups facilitate even more robust queries: they're
                    like a bunch of individual searches grouped into one. A
                    user searching for occurrenes of symbol
                    <span class="string">"curses"</span> in the language
                    <span class="string">"Python"</span>, and
                    <span class="string">"ncurses"</span> in
                    <span id="string">"C"</span>, won't get away with:
                    <span class="code">"symbols:curses ncurses"</span> and
                    <span class="code">"languages:Python C"</span>. The engine
                    might return results <span id="string">"curses"</span> in
                    <span class="string">"C"</span> and
                    <span class="string">"ncurses"</span> in
                    <span class="string">"Python"</span>!

                    To work around that, you can use two search groups: one for
                    <span class="string">"curses"</span> in
                    <span class="string">"Python"</span>, and another for
                    <span class="string">"curses"</span> in
                    <span id="string">"C"</span>.
                    <span class="title">bitshift</span> will return the union
                    of both sets of search results.
                  </p>
                </li>
              </ul>
            </p>
          </li>
        </ul>
      </p>
    </li>

    <li>
      <h1><span>&raquo;</span> API</h1>
      <p>
        <span class="title">bitshift</span> provides an API through GET
        requests to
        <a href="http://bitshift.it/search.json"><span class="code">/search.json</span></a>.
      </p>
      <h2>parameters</h2>
      <ul>
        <li>
          <span class="code">q</span> : The search query, as entered into the
          search bar.
        </li>
        <li>
          <span class="code">p</span> : The result page to return. Defaults to
          <span class="code">1</span>. Each page contains ten results, so this
          effectively offsets the search by
          <span class="code">10 * (p - 1)</span> codelets.
        </li>
        <li>
          <span class="code">hl</span> : Whether to return code as
          <a href="http://pygments.org/">pygments</a>-highlighted HTML or as
          plain source. Defaults to <span class="code">false</span>.
        </li>
      </ul>
      <h2>output</h2>
      <p>
        <span class="code">/search.json</span> returns a JSON-encoded
        dictionary. If there was an error, it will contain a single key,
        <span class="code">"error"</span>, whose value will contain a
        human-readable description of the error. Otherwise, there will be two
        keys: <span class="code">"count"</span>, storing the number of results,
        and <span class="code">"results"</span>, storing a list of codelets.
        Each codelet is a dictionary with the following key–value pairs:
      </p>
      <ul>
        <li>
          <span class="code">name</span> : The name of the codelet.
        </li>
        <li>
          <span class="code">code</span> : The actual source code if
          <span class="code">hl</span> was not given or was
          <span class="code">false</span>; HTML code otherwise.
        </li>
        <li>
          <span class="code">lang</span> : The language of the code.
        </li>
        <li>
          <span class="code">authors</span> : A list of authors. Each author is
          a list of two items: their name, and URL (or
          <span class="code">null</span> if none is known).
        </li>
        <li>
          <span class="code">url</span> : The URL of the page where the code
          was crawled from.
        </li>
        <li>
          <span class="code">created</span> : The date the code was created, as
          a
          <a href="https://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a>-formatted
          string (e.g. <span class="code">"2014-06-01T12:41:28"</span>).
        </li>
        <li>
          <span class="code">modified</span> : The date the code was last
          modified, as a
          <a href="https://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a>-formatted
          string (e.g. <span class="code">"2014-06-01T12:41:28"</span>).
        </li>
        <li>
          <span class="code">origin</span> : A list of two items: the
          originating site's name (e.g. <span class="code">"GitHub"</span>) and
          URL (e.g. <span class="code">"https://github.com"</span>).
        </li>
      </ul>
      <h2>example</h2>
      <p>
        The following example Python 2 code searches for a given Python
        function definition and prints the URL of the first result:
      </p>
      <table class="highlighttable code-example">
        <tr>
          <td class="linenos">
            <div class="linenodiv">
              <pre> 1
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            </div>
          </td>
          <td class="code">
            <div class="highlight">
              <pre><span class="c">#!/usr/bin/env python</span>

<span class="kn">from</span> <span class="nn">json</span> <span class="kn">import</span> <span class="n">loads</span>
<span class="kn">from</span> <span class="nn">sys</span> <span class="kn">import</span> <span class="n">argv</span>
<span class="kn">from</span> <span class="nn">urllib</span> <span class="kn">import</span> <span class="n">urlencode</span>
<span class="kn">from</span> <span class="nn">urllib2</span> <span class="kn">import</span> <span class="n">urlopen</span>

<span class="k">def</span> <span class="nf">get_function</span><span class="p">(</span><span class="n">name</span><span class="p">):</span>
    <span class="n">params</span> <span class="o">=</span> <span class="p">{</span><span class="s">&quot;q&quot;</span><span class="p">:</span> <span class="s">&quot;lang:python and func:def:</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">name</span><span class="p">}</span>
    <span class="n">request</span> <span class="o">=</span> <span class="n">urlopen</span><span class="p">(</span><span class="s">&quot;http://bitshift.it/search.json?&quot;</span> <span class="o">+</span> <span class="n">urlencode</span><span class="p">(</span><span class="n">params</span><span class="p">))</span>
    <span class="n">res</span> <span class="o">=</span> <span class="n">loads</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">read</span><span class="p">())[</span><span class="s">&quot;results&quot;</span><span class="p">]</span>
    <span class="k">if</span> <span class="n">res</span><span class="p">:</span>
        <span class="k">print</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">res</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="s">&quot;url&quot;</span><span class="p">])</span>
    <span class="k">else</span><span class="p">:</span>
        <span class="k">print</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s"> not found.&quot;</span> <span class="o">%</span> <span class="n">name</span>

<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&quot;__main__&quot;</span><span class="p">:</span>
    <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">argv</span><span class="p">)</span> <span class="o">==</span> <span class="mi">2</span><span class="p">:</span>
        <span class="n">get_function</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></pre>
            </div>
          </td>
        </tr>
      </table>
    </li>

    <li id="sec3">
      <h1><span>&raquo;</span> Get Involved</h1>
      <p>
        <span class="title">bitshift</span> is <span id="gasp">(gasp)</span>
        open-source! The project is hosted on
        <a href="https://github.com/earwig/bitshift">GitHub</a>; feel free to
        file an issue or submit a pull request.
      </p>
    </li>
  </ul>
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