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<!DOCTYPE HTML>
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<head><meta name="generator" content="Hexo 3.9.0">
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<title>jacpy's blog</title>
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<h1 class="site-name"><a href="/" title="jacpy's blog">jacpy's blog</a></h1>
<h2 class="blog-motto">enjoy mobile development</h2>
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<h1 itemprop="name">
<a href="/2019/11/07/nodejs-file-data-stream-has-unexpected-number-of-bytes.html" title="Nodejs使用archiver-zip-encrypted库加密压缩文件时报错" itemprop="url">Nodejs使用archiver-zip-encrypted库加密压缩文件时报错</a>
</h1>
<p class="article-author">By
<a href="/about" title="jacpy" target="_blank" itemprop="author">jacpy</a>
<p class="article-time">
<time datetime="2019-11-07T12:35:10.000Z" itemprop="datePublished"> 发表于 2019-11-07</time>
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<p>前几天在维护一个nodejs写的命令行工具，要增加一个压缩zip文件时加密码功能。压缩文件时使用了<a href="https://www.npmjs.com/package/archiver" target="_blank" rel="noopener">archiver</a>库，加密码使用了<a href="https://www.npmjs.com/package/archiver-zip-encrypted" target="_blank" rel="noopener">archiver-zip-encrypted</a>库。在windows系统上测试时，发现会概率的出现以下异常：</p>
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<a href="/2019/11/07/nodejs-file-data-stream-has-unexpected-number-of-bytes.html#more">Read More</a>
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<span></span> <a href="/tags/nodejs-archiver-zip-encrypted/">nodejs archiver-zip-encrypted</a>
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<span></span>
<a href="/2019/11/07/nodejs-file-data-stream-has-unexpected-number-of-bytes.html#comments" class="ds-thread-count comments-count-link" data-thread-key="2019/11/07/nodejs-file-data-stream-has-unexpected-number-of-bytes.html" data-count-type="comments"> </a>
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<a href="/2019/09/26/z-data-error-invalid-code-lengths-set.html" title="Android编译minizip库运行时报Z_DATA_ERROR invalid code lengths set错误处理方法" itemprop="url">Android编译minizip库运行时报Z_DATA_ERROR invalid code lengths set错误处理方法</a>
</h1>
<p class="article-author">By
<a href="/about" title="jacpy" target="_blank" itemprop="author">jacpy</a>
<p class="article-time">
<time datetime="2019-09-26T09:56:06.000Z" itemprop="datePublished"> 发表于 2019-09-26</time>
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<p>这几天在Android上给zip加上aes解密方法，刚开始使用的是<code>zlib</code>库中的<code>minizip</code>代码，发现不支持<code>aes</code>加解密，就换了github上的<a href="https://github.com/nmoinvaz/minizip" target="_blank" rel="noopener">minizip</a>库。等都编译OK，一运行就出现了异常，返回结果为-3，把msg输出如下所示：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">invalid code lengths set</span><br></pre></td></tr></table></figure>
<p>搜索了-3，发现对应的是Z_DATA_ERROR。把测试zip包用winrar解密，发现一切正常，不是zip包数据原因。</p>
<p>然后编译了源码中<code>minizip.c</code>文件，使用命令的方式执行了一下生成的<code>minizip</code>文件，发现能正常解密。看了一下<code>minizip</code>源码中的<code>CMakeLists.txt</code>文件，给<code>Android.mk</code>文件中增加了如下参数：</p>
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<a class="article-category-link" href="/categories/minizip/">minizip</a>
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<span></span> <a href="/tags/Z-DATA-ERROR-invalid-code-lengths-set/">Z_DATA_ERROR invalid code lengths set</a>
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<a href="/2019/09/19/cannot-install-apk-in-android-17-width-jarsigner.html" title="使用jarsigner签名的apk无法在android 4.2及以下版本系统安装" itemprop="url">使用jarsigner签名的apk无法在android 4.2及以下版本系统安装</a>
</h1>
<p class="article-author">By
<a href="/about" title="jacpy" target="_blank" itemprop="author">jacpy</a>
<p class="article-time">
<time datetime="2019-09-19T11:52:15.000Z" itemprop="datePublished"> 发表于 2019-09-19</time>
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<p>这几天遇到一件怪事，使用加固工具后，打包出来的APK无法在Android 4.2版本的手机上安装，不使用加固打出来的安装包却可以安装。于是找加固厂商询问原因，加固厂商拿了不能安装的文件后，又发了一个安装包让我们测试一下，结果可以了。询问原因，说是我们给的安装包没有签名，加上签名信息就好了。于是用<code>keytool</code>工具看了下原安装文件的签名信息，发现都有。把执行命令包含有签名信息的截图发过去了之后，加固厂商问了使用的签名工具，然后说是用<code>jarsigner</code>工具的问题。于是一查，还真是。</p>
<p class="article-more-link">
<a href="/2019/09/19/cannot-install-apk-in-android-17-width-jarsigner.html#more">Read More</a>
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<a class="article-category-link" href="/categories/android/">android</a>
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<span></span> <a href="/tags/cannot-install-apk/">cannot install apk</a>
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<a href="/2019/09/18/golang-exec-command-tools.html" title="golang执行命令获取执行结果状态" itemprop="url">golang执行命令获取执行结果状态</a>
</h1>
<p class="article-author">By
<a href="/about" title="jacpy" target="_blank" itemprop="author">jacpy</a>
<p class="article-time">
<time datetime="2019-09-18T05:00:27.000Z" itemprop="datePublished"> 发表于 2019-09-18</time>
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<p>这几天在用golang写一个工具，要执行外部命令工具，而且还要将外部命令工具输出的日志也要输出出来。网上找了一下，资料很多，关键是执行的结果成功或失败状态没找到好的方法获取到。刚开始想的是看错误日志，如果有错误日志，那么就是执行失败。测试的时候发现这样不行，发现有些时候会用error输出日志，但不一定就是执行失败。后来想用日志中的关键字匹配，因为有些命令执行成功或失败都是有关键字输出的，测试发现也不太好。最后没办法，看了一下<code>Cmd.Wait()</code>方法的实现，突然眼前一亮，找到方法了，有一个<code>Cmd.ProcessState</code>结构体可以使用。于是整理了一下，贴一下代码实现：</p>
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<a href="/2019/09/18/golang-exec-command-tools.html#more">Read More</a>
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<span></span> <a href="/tags/golang-command-status/">golang command status</a>
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<a href="/2019/09/16/jquery-cors.html" title="jquery跨域问题导致ajax请求直接走error回调函数" itemprop="url">jquery跨域问题导致ajax请求直接走error回调函数</a>
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<a href="/about" title="jacpy" target="_blank" itemprop="author">jacpy</a>
<p class="article-time">
<time datetime="2019-09-16T09:02:48.000Z" itemprop="datePublished"> 发表于 2019-09-16</time>
</p>
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<p>使用jquery的ajax请求时，发现每次都是走error的回调函数，错误提示的日志为<code>{"readyState":0, status: 0, status:"error"}</code>。抓包请求发现请求正常返回数据，但是js代码却执行error的回调。其他组开发人员反馈的问题描述是在App中使用离线代码没有问题，使用地址访问就有问题。自然而然就想到了跨域问题，一看请求地址，果然。</p>
<p>服务器端接口响应的头增加以下内容就可以解决：</p>
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<a href="/2019/09/16/jquery-cors.html#more">Read More</a>
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<a href="/2018/07/26/eventbus-implement-analysis-2.html" title="EventBus实现分析（下）" itemprop="url">EventBus实现分析（下）</a>
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<a href="/about" title="jacpy" target="_blank" itemprop="author">jacpy</a>
<p class="article-time">
<time datetime="2018-07-26T01:45:13.000Z" itemprop="datePublished"> 发表于 2018-07-26</time>
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<p><a href="/2018/07/23/eventbus-implement-analysis-1.html">EventBus实现分析（上）</a>中介绍了<code>EventBus</code>的<code>简单使用</code>和<code>解决什么问题</code>，这一节介绍EventBus的实现细节。</p>
<h2 id="三、实现细节"><a href="#三、实现细节" class="headerlink" title="三、实现细节"></a>三、实现细节</h2><p>前面在介绍EventBus的使用时，也顺带着讲了一些细节。下面先从两个流程开始，一个是注册流程，另一个是发送消息并且处理的流程。</p>
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<a href="/2018/07/23/eventbus-implement-analysis-1.html" title="EventBus实现分析（上）" itemprop="url">EventBus实现分析（上）</a>
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<time datetime="2018-07-23T04:59:17.000Z" itemprop="datePublished"> 发表于 2018-07-23</time>
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<p>最近看了一下<code>EventBus</code>实现的源码，分享一下自己的心得体会。</p>
<p><code>EventBus</code>这个库实现很简单，如官方所说一样，库体积很小。将组件之间的通信通过解耦的方式表现的淋漓尽致，废话不多说，<code>EventBus</code>优点官网上列举了一堆，有兴趣的可以去看一下<a href="http://greenrobot.org/eventbus/" target="_blank" rel="noopener">http://greenrobot.org/eventbus/</a>。</p>
<p>分享主要有以下几个方面：</p>
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<a href="/2018/07/05/android-security-check-tool-drozer.html" title="android 安全检测工具drozer环境搭建" itemprop="url">android 安全检测工具drozer环境搭建</a>
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<time datetime="2018-07-05T00:52:47.000Z" itemprop="datePublished"> 发表于 2018-07-05</time>
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<p>最近在处理公司App的安全问题，跟第三方公司人员沟通，提到有使用<code>drozer</code>工具检测。装了下这个工具，在这里记录一些坑。</p>
<p><code>drozer</code>是一个python编写的开源工具，在<code>github</code>上面有源码，地址：<a href="https://github.com/mwrlabs/drozer" target="_blank" rel="noopener">https://github.com/mwrlabs/drozer</a>。其功能很强大，可以检测App中的四大组件的导出情况、Intent拒绝服务、SQL注入风险以及可以自定义Module等。尤其是自定义Module功能，自己按格式编写一个Module功能，就可以获取终端设备及App的信息。</p>
<p><code>drozer</code>工具有两部分：一是PC端，另一部分是终端APK。</p>
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<a href="/2018/05/18/okhttp-too-many-follow-up-requests-21.html" title="okhttp too many follow-up requests 21" itemprop="url">okhttp too many follow-up requests 21</a>
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<time datetime="2018-05-18T05:12:17.000Z" itemprop="datePublished"> 发表于 2018-05-18</time>
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<p>博客好长时间没有更新了，因为年底和年初，你懂的，希望以后进入轨。</p>
<p>前几天在开发过程中遇到这样一个HTTP请求错误：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">okhttp too many follow-up requests: 21</span><br></pre></td></tr></table></figure>
<p>看到<code>okhttp</code>反应过来是底层请求出现问题了，以前从来没有遇到过，很好奇。在github上面<a href="https://github.com/square/okhttp" target="_blank" rel="noopener">okhttp</a>库搜索了一下上面的关键字，找到下面的代码：</p>
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<a href="/2018/02/28/android-camera-out-of-memory-solution.html" title="android使用相机扫描出现内存溢出解决过程" itemprop="url">android使用相机扫描出现内存溢出解决过程</a>
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<time datetime="2018-02-28T00:39:15.000Z" itemprop="datePublished"> 发表于 2018-02-28</time>
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<p>博客好长时间没有更新了，由于前段时间疯狂赶项目，有些问题没有来得及时整理，后面慢慢总结一下。</p>
<p>前段时间在优化相机扫描二维码时，遇到了一个内存溢出问题，内存被用完了，日志中出现<code>E/dalvikvm-heap: Out of memory on a 2366828-byte allocation</code>错误提示，App也没有崩溃，只是相机不再输出拍摄到的内容。使用<code>Zxing</code>做过二维码扫描的同学都知道，被扫描到的内容会不停的被处理，并识别出二维码内容，如果有。而此时内存被用完了的现象是：相应的回调处理识别二维码内容的方法没有被调用。于是展开了排查。</p>
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<a href="/2017/11/11/boost-compile-and-clion-config.html" title="boost编译和CLion配置" itemprop="url">boost编译和CLion配置</a>
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<time datetime="2017-11-11T14:54:44.000Z" itemprop="datePublished"> 发表于 2017-11-11</time>
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<p>前几天编译<code>boost</code>库<code>1.65.1</code>版本，遇到一些问题，主要是与环境和版本有关系，如果不知道这些细节，很难找出问题。这里记录一下。</p>
<h2 id="一、boost库编译"><a href="#一、boost库编译" class="headerlink" title="一、boost库编译"></a>一、boost库编译</h2><p>在windows下编译<code>boost</code>库可以参照这里：<a href="https://gist.github.com/sim642/29caef3cc8afaa273ce6" target="_blank" rel="noopener">https://gist.github.com/sim642/29caef3cc8afaa273ce6</a> ，整个过程配置都可以按照上面来，但是要注意下最新版本的<code>MinGW</code>，同时还要注意是64位的还是32位的。</p>
<p>因使用的<code>boost</code>版本是目前最新版本的，所以要求内置<code>gcc</code>编译器的<code>MinGW</code>也要是最新版本的，否则在执行<code>b2</code>命令设置<code>toolset=gcc</code>时，会提示找不到<code>gcc</code>。另外还要注意系统是32位还是64位，对应的gcc也要相同的版本。</p>
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<time datetime="2017-10-27T15:01:11.000Z" itemprop="datePublished"> 发表于 2017-10-27</time>
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<p>前几天处理一个很奇葩的问题，解决过程可谓一波三折啊，处理起来却很有意思，这里记录一下。</p>
<p>事情的起因是同事写了一个在android系统调用系统相机的拍照的功能，将路径通过Intent传过去，照片拍好后保存到路径，通过路径取这张照片。</p>
<p>突然有一天点这拍照功能无效了，直接crash。一看异常日志，发现抛出的是<code>ActivityNotFoundException</code>。第一反应是以为是Activity没有注册或者打包出现问题了，于是把Apk反编译，在AndroidManifest.xml中检查了下注册，在dex文件中也找了下相关的类，结果发现都没有问题。</p>
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<time datetime="2017-10-26T04:50:00.000Z" itemprop="datePublished"> 发表于 2017-10-26</time>
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<p>前几天使用<code>golang</code>时，遇到一个很奇怪的问题，原因是对<code>golang</code>不熟悉，所以记录一下。</p>
<p>在使用<code>append()</code>函数给<code>slice</code>中添加元素时，<code>slice</code>的初始大小可以为0，也就是<code>len</code>可以为0。每次向<code>slice</code>中<code>append</code>的时候，如果容量<code>cap</code>不够，会自动对<code>slice</code>进行扩容，也就是改变<code>slice</code>的<code>cap</code>的大小。</p>
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<a href="/2017/09/28/okhttp-used-attentions.html" title="Okhttp使用注意事项" itemprop="url">Okhttp使用注意事项</a>
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<time datetime="2017-09-28T07:10:42.000Z" itemprop="datePublished"> 发表于 2017-09-28</time>
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<p>前几天在使用<code>Okhttp</code>时遇到两个坑，这里记录一下。一个是在请求头中不需要设置<code>Accept-Encoding</code>为<code>gzip</code>，使用<code>Okhttp</code>默认的就好；第二个是添加到<code>Okhttp</code>请求头里面的键值对不能为空。</p>
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<a href="/2017/09/28/fresco-used-httpurlconnection-support-https-image-loader.html" title="Fresco使用HttpURLConnection支持加载https链接图片" itemprop="url">Fresco使用HttpURLConnection支持加载https链接图片</a>
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