chendeben
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ProxyPool


			
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  <h1>Source code for proxypool.utils</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">requests</span>
<span class="kn">import</span> <span class="nn">lxml</span>
<span class="kn">import</span> <span class="nn">asyncio</span>
<span class="kn">import</span> <span class="nn">time</span>
<span class="kn">import</span> <span class="nn">aiohttp</span>
<span class="kn">from</span> <span class="nn">bs4</span> <span class="k">import</span> <span class="n">BeautifulSoup</span>

<span class="n">headers</span> <span class="o">=</span> <span class="p">{</span>
    <span class="s1">&#39;User-Agent&#39;</span><span class="p">:</span> <span class="s1">&#39;Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 </span><span class="se">\</span>
<span class="s1">    (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36&#39;</span><span class="p">,</span>
    <span class="s1">&#39;Accept-Encoding&#39;</span><span class="p">:</span> <span class="s1">&#39;gzip, deflate, sdch&#39;</span><span class="p">,</span>
    <span class="s1">&#39;Accept-Language&#39;</span><span class="p">:</span> <span class="s1">&#39;zh-CN,zh;q=0.8&#39;</span>
<span class="p">}</span>


<div class="viewcode-block" id="get_page"><a class="viewcode-back" href="../../proxypool.html#proxypool.utils.get_page">[docs]</a><span class="k">def</span> <span class="nf">get_page</span><span class="p">(</span><span class="n">url</span><span class="p">):</span>
    <span class="n">r</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="n">headers</span><span class="p">)</span>
    <span class="k">try</span><span class="p">:</span>
        <span class="n">soup</span> <span class="o">=</span> <span class="n">BeautifulSoup</span><span class="p">(</span><span class="n">r</span><span class="o">.</span><span class="n">content</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s2">&quot;utf-8&quot;</span><span class="p">),</span> <span class="s1">&#39;lxml&#39;</span><span class="p">)</span>
    <span class="k">except</span> <span class="ne">UnicodeDecodeError</span><span class="p">:</span>
        <span class="n">soup</span> <span class="o">=</span> <span class="n">BeautifulSoup</span><span class="p">(</span><span class="n">r</span><span class="o">.</span><span class="n">text</span><span class="p">,</span> <span class="s1">&#39;lxml&#39;</span><span class="p">)</span>
    <span class="k">return</span> <span class="n">soup</span></div>


<div class="viewcode-block" id="Downloader"><a class="viewcode-back" href="../../proxypool.html#proxypool.utils.Downloader">[docs]</a><span class="k">class</span> <span class="nc">Downloader</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    一个异步下载器，可以对代理源异步抓取，但是容易被BAN。</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">urls</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">urls</span> <span class="o">=</span> <span class="n">urls</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_htmls</span> <span class="o">=</span> <span class="p">[]</span>

<div class="viewcode-block" id="Downloader.download_single_page"><a class="viewcode-back" href="../../proxypool.html#proxypool.utils.Downloader.download_single_page">[docs]</a>    <span class="k">async</span> <span class="k">def</span> <span class="nf">download_single_page</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">):</span>
        <span class="k">async</span> <span class="k">with</span> <span class="n">aiohttp</span><span class="o">.</span><span class="n">ClientSession</span><span class="p">()</span> <span class="k">as</span> <span class="n">session</span><span class="p">:</span>
            <span class="k">async</span> <span class="k">with</span> <span class="n">session</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">url</span><span class="p">)</span> <span class="k">as</span> <span class="n">resp</span><span class="p">:</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">_htmls</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="k">await</span> <span class="n">resp</span><span class="o">.</span><span class="n">text</span><span class="p">())</span></div>

<div class="viewcode-block" id="Downloader.download"><a class="viewcode-back" href="../../proxypool.html#proxypool.utils.Downloader.download">[docs]</a>    <span class="k">def</span> <span class="nf">download</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="n">loop</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">get_event_loop</span><span class="p">()</span>
        <span class="n">tasks</span> <span class="o">=</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">download_single_page</span><span class="p">(</span><span class="n">url</span><span class="p">)</span> <span class="k">for</span> <span class="n">url</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">urls</span><span class="p">]</span>
        <span class="n">loop</span><span class="o">.</span><span class="n">run_until_complete</span><span class="p">(</span><span class="n">asyncio</span><span class="o">.</span><span class="n">wait</span><span class="p">(</span><span class="n">tasks</span><span class="p">))</span></div>

    <span class="nd">@property</span>
    <span class="k">def</span> <span class="nf">htmls</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">download</span><span class="p">()</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_htmls</span></div>
</pre></div>

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