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<title>6. Http client — BL602 IoT SDK release_bl_iot_sdk_1.6.11-1-g66bb28da 文档</title>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">6. Http client</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#id1">6.1. 总览</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#id2">6.2. 准备和使用步骤</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../demo_protocols_httpc/httpc.html">7. Httpc client</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../demo_wifi/wifi.html">12. WiFi</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../demo_mesh/mesh.html">14. Mesh</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../demo_blsync_ble/blsync_ble.html">15. BLSYNC-BLE</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../sdk_app_easyflash_boottimes/easyflash_boottimes.html">16. Easyflash4 boot times</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/Command_line/aos_cli.html">3. cli</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/Hal_drv/gpio.html">4. GPIO</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/Middleware/bloop/bloop.html">5. BLOOP</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/Network/httpc/httpc.html">12. HTTPC</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/Network/https/https.html">13. HTTPS</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/Network/tls/tls.html">14. TLS</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/BLE/provision_WiFi/provision_WiFi.html">15. Provision_WiFi</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/BLE/mesh/mesh.html">16. Mesh</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../Components/BLE/ble_stack/ble_stack.html">17. BLE</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../API/wifi/wifi_mgmr.html">2. Wi-Fi Manager</a></li>
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<li><span class="section-number">6. </span>Http client</li>
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<a href="../../_sources/Examples/demo_protocols_http/http.rst.txt" rel="nofollow"> 查看页面源码</a>
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<div class="section" id="http-client">
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<span id="http-index"></span><h1><span class="section-number">6. </span>Http client<a class="headerlink" href="#http-client" title="永久链接至标题">¶</a></h1>
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<div class="section" id="id1">
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<h2><span class="section-number">6.1. </span>总览<a class="headerlink" href="#id1" title="永久链接至标题">¶</a></h2>
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<p>本示例主要介绍如何创建一个socket并连接到指定的Http服务器获取数据的过程。</p>
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</div>
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<div class="section" id="id2">
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<h2><span class="section-number">6.2. </span>准备和使用步骤<a class="headerlink" href="#id2" title="永久链接至标题">¶</a></h2>
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<ul>
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<li><p>使用之前需要准备可用的URL以及网络。</p></li>
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<li><p>使用步骤:</p>
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<ul>
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<li><p>编译 <code class="docutils literal notranslate"><span class="pre">customer_app/sdk_app_http_client_socket</span></code> 工程并下载工程;</p></li>
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<li><p>在终端输入开启wifi的命令: <code class="docutils literal notranslate"><span class="pre">stack_wifi</span></code> ,输入连接wifi的命令: <code class="docutils literal notranslate"><span class="pre">wifi_sta_connect</span> <span class="pre"><name></span> <span class="pre"><key></span></code> ,并确认wifi连接成功(如输入:wifi_sta_connect bl_test_005 12345678);</p>
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<div class="figure align-default">
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<img alt="" src="../../_images/image116.png" />
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</div>
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<div class="figure align-default">
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<img alt="" src="../../_images/image214.png" />
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</div>
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</li>
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<li><p>使用 <code class="docutils literal notranslate"><span class="pre">http</span></code> 命令通过socket的方式进行下载。</p>
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<div class="figure align-default">
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<img alt="" src="../../_images/image313.png" />
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</div>
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</li>
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</ul>
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</li>
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</ul>
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</div>
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<div class="section" id="id3">
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<h2><span class="section-number">6.3. </span>应用实例<a class="headerlink" href="#id3" title="永久链接至标题">¶</a></h2>
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<ul class="simple">
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<li><p>通过 <code class="docutils literal notranslate"><span class="pre">hostname</span></code> 获取 <code class="docutils literal notranslate"><span class="pre">hostinfo</span></code></p></li>
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</ul>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>struct hostent *hostinfo = gethostbyname(hostname);
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if (!hostinfo) {
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printf("gethostbyname Failed\r\n");
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return -1;
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}
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</pre></div>
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</div>
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<ul class="simple">
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<li><p>创建一个 <code class="docutils literal notranslate"><span class="pre">socket</span></code> 连接并发送http请求。</p></li>
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</ul>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">((</span><span class="n">sockfd</span> <span class="o">=</span> <span class="n">socket</span><span class="p">(</span><span class="n">AF_INET</span><span class="p">,</span> <span class="n">SOCK_STREAM</span><span class="p">,</span> <span class="mi">0</span><span class="p">))</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
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<span class="n">printf</span><span class="p">(</span><span class="s2">"Error in socket</span><span class="se">\r\n</span><span class="s2">"</span><span class="p">);</span>
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<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
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<span class="p">}</span>
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<span class="o">/*---</span><span class="n">Initialize</span> <span class="n">server</span> <span class="n">address</span><span class="o">/</span><span class="n">port</span> <span class="n">struct</span><span class="o">---*/</span>
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<span class="n">memset</span><span class="p">(</span><span class="o">&</span><span class="n">dest</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">sizeof</span><span class="p">(</span><span class="n">dest</span><span class="p">));</span>
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<span class="n">dest</span><span class="o">.</span><span class="n">sin_family</span> <span class="o">=</span> <span class="n">AF_INET</span><span class="p">;</span>
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<span class="n">dest</span><span class="o">.</span><span class="n">sin_port</span> <span class="o">=</span> <span class="n">htons</span><span class="p">(</span><span class="n">PORT</span><span class="p">);</span>
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<span class="n">dest</span><span class="o">.</span><span class="n">sin_addr</span> <span class="o">=</span> <span class="o">*</span><span class="p">((</span><span class="n">struct</span> <span class="n">in_addr</span> <span class="o">*</span><span class="p">)</span> <span class="n">hostinfo</span><span class="o">-></span><span class="n">h_addr</span><span class="p">);</span>
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<span class="o">//</span><span class="n">char</span> <span class="n">ip</span><span class="p">[</span><span class="mi">16</span><span class="p">];</span>
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<span class="n">uint32_t</span> <span class="n">address</span> <span class="o">=</span> <span class="n">dest</span><span class="o">.</span><span class="n">sin_addr</span><span class="o">.</span><span class="n">s_addr</span><span class="p">;</span>
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<span class="n">char</span> <span class="o">*</span><span class="n">ip</span> <span class="o">=</span> <span class="n">inet_ntoa</span><span class="p">(</span><span class="n">address</span><span class="p">);</span>
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<span class="n">printf</span><span class="p">(</span><span class="s2">"Server ip Address : </span><span class="si">%s</span><span class="se">\r\n</span><span class="s2">"</span><span class="p">,</span> <span class="n">ip</span><span class="p">);</span>
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<span class="o">/*---</span><span class="n">Connect</span> <span class="n">to</span> <span class="n">server</span><span class="o">---*/</span>
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<span class="k">if</span> <span class="p">(</span><span class="n">connect</span><span class="p">(</span><span class="n">sockfd</span><span class="p">,</span>
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<span class="p">(</span><span class="n">struct</span> <span class="n">sockaddr</span> <span class="o">*</span><span class="p">)</span><span class="o">&</span><span class="n">dest</span><span class="p">,</span>
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<span class="n">sizeof</span><span class="p">(</span><span class="n">dest</span><span class="p">))</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
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<span class="n">printf</span><span class="p">(</span><span class="s2">"Error in connect</span><span class="se">\r\n</span><span class="s2">"</span><span class="p">);</span>
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<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
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<span class="p">}</span>
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<span class="o">/*---</span><span class="n">Get</span> <span class="s2">"Hello?"</span><span class="o">---*/</span>
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<span class="n">memset</span><span class="p">(</span><span class="n">buffer</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">MAXBUF</span><span class="p">);</span>
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<span class="n">char</span> <span class="n">wbuf</span><span class="p">[]</span>
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<span class="o">=</span> <span class="s2">"GET /ddm/ContentResource/music/204.mp3 HTTP/1.1</span><span class="se">\r\n</span><span class="s2">Host: nf.cr.dandanman.com</span><span class="se">\r\n</span><span class="s2">User-Agent: wmsdk</span><span class="se">\r\n</span><span class="s2">Accept: */*</span><span class="se">\r\n\r\n</span><span class="s2">"</span><span class="p">;</span>
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<span class="n">write</span><span class="p">(</span><span class="n">sockfd</span><span class="p">,</span> <span class="n">wbuf</span><span class="p">,</span> <span class="n">sizeof</span><span class="p">(</span><span class="n">wbuf</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">);</span>
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</pre></div>
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</div>
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<ul class="simple">
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<li><p>获取http响应的数据,完成时打印获取数据花费的时间和传输的速度。</p></li>
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</ul>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="k">while</span> <span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
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<span class="n">ret</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="n">sockfd</span><span class="p">,</span> <span class="n">recv_buffer</span><span class="p">,</span> <span class="n">BUFFER_SIZE</span><span class="p">);</span>
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<span class="k">if</span> <span class="p">(</span><span class="n">ret</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
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<span class="n">printf</span><span class="p">(</span><span class="s2">"eof</span><span class="se">\n\r</span><span class="s2">"</span><span class="p">);</span>
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<span class="k">break</span><span class="p">;</span>
|
||
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">ret</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
<span class="n">printf</span><span class="p">(</span><span class="s2">"ret = </span><span class="si">%d</span><span class="s2">, err = </span><span class="si">%d</span><span class="se">\n\r</span><span class="s2">"</span><span class="p">,</span> <span class="n">ret</span><span class="p">,</span> <span class="n">errno</span><span class="p">);</span>
|
||
<span class="k">break</span><span class="p">;</span>
|
||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||
<span class="n">total</span> <span class="o">+=</span> <span class="n">ret</span><span class="p">;</span>
|
||
<span class="o">/*</span><span class="n">use</span> <span class="n">less</span> <span class="n">debug</span><span class="o">*/</span>
|
||
<span class="k">if</span> <span class="p">(</span><span class="mi">0</span> <span class="o">==</span> <span class="p">((</span><span class="n">debug_counter</span><span class="o">++</span><span class="p">)</span> <span class="o">&</span> <span class="mh">0xFF</span><span class="p">))</span> <span class="p">{</span>
|
||
<span class="n">printf</span><span class="p">(</span><span class="s2">"total = </span><span class="si">%d</span><span class="s2">, ret = </span><span class="si">%d</span><span class="se">\n\r</span><span class="s2">"</span><span class="p">,</span> <span class="n">total</span><span class="p">,</span> <span class="n">ret</span><span class="p">);</span>
|
||
<span class="p">}</span>
|
||
<span class="o">//</span><span class="n">vTaskDelay</span><span class="p">(</span><span class="mi">2</span><span class="p">);</span>
|
||
<span class="k">if</span> <span class="p">(</span><span class="n">total</span> <span class="o">></span> <span class="mi">82050000</span><span class="p">)</span> <span class="p">{</span>
|
||
<span class="n">ticks_end</span> <span class="o">=</span> <span class="n">xTaskGetTickCount</span><span class="p">();</span>
|
||
<span class="n">time_consumed</span> <span class="o">=</span> <span class="p">((</span><span class="n">uint32_t</span><span class="p">)(((</span><span class="n">int32_t</span><span class="p">)</span><span class="n">ticks_end</span><span class="p">)</span> <span class="o">-</span> <span class="p">((</span><span class="n">int32_t</span><span class="p">)</span><span class="n">ticks_start</span><span class="p">)))</span> <span class="o">/</span> <span class="mi">1000</span><span class="p">;</span>
|
||
<span class="n">printf</span><span class="p">(</span><span class="s2">"Download comlete, total time </span><span class="si">%u</span><span class="s2"> s, speed </span><span class="si">%u</span><span class="s2"> Kbps</span><span class="se">\r\n</span><span class="s2">"</span><span class="p">,</span>
|
||
<span class="p">(</span><span class="n">unsigned</span> <span class="nb">int</span><span class="p">)</span><span class="n">time_consumed</span><span class="p">,</span>
|
||
<span class="p">(</span><span class="n">unsigned</span> <span class="nb">int</span><span class="p">)(</span><span class="n">total</span> <span class="o">/</span> <span class="n">time_consumed</span> <span class="o">*</span> <span class="mi">8</span> <span class="o">/</span> <span class="mi">1000</span><span class="p">)</span>
|
||
<span class="p">);</span>
|
||
<span class="k">break</span><span class="p">;</span>
|
||
<span class="p">}</span>
|
||
<span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<ul class="simple">
|
||
<li><p>关闭 <code class="docutils literal notranslate"><span class="pre">socket</span></code> 。</p></li>
|
||
</ul>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">close</span><span class="p">(</span><span class="n">sockfd</span><span class="p">);</span>
|
||
</pre></div>
|
||
</div>
|
||
<ul class="simple">
|
||
<li><p>在 <code class="docutils literal notranslate"><span class="pre">customer_app/sdk_app_http_client_socket/sdk_app_http_client_socket/demo.c</span></code> 中 <code class="docutils literal notranslate"><span class="pre">static</span> <span class="pre">void</span> <span class="pre">_cli_init()</span></code> 的函数里调用 <code class="docutils literal notranslate"><span class="pre">http_client_cli_init()</span></code> 初始化http命令</p></li>
|
||
</ul>
|
||
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|
||
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||
|
||
|
||
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