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<!DOCTYPE html><html lang="zh-CN" data-theme="light"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"><title>王恒's Blog - Do one thing and do it well.</title><meta name="keywords" content="Java,Hadoop,Linux,Shell,C#,PHP,Python,Coder,Arduino,Raspberry pi"><meta name="author" content="王恒"><meta name="copyright" content="王恒"><meta name="format-detection" content="telephone=no"><meta name="theme-color" content="#ffffff"><meta name="description" content="make progress little day by day.">
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})(window)</script><meta name="generator" content="Hexo 5.4.2"></head><body><div id="sidebar"><div id="menu-mask"></div><div id="sidebar-menus"><div class="avatar-img is-center"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="/img/avatar.png" onerror="onerror=null;src='/img/friend_404.gif'" alt="avatar"/></div><div class="sidebar-site-data site-data is-center"><a href="/archives/"><div class="headline">文章</div><div class="length-num">86</div></a><a href="/tags/"><div class="headline">标签</div><div class="length-num">132</div></a><a href="/categories/"><div class="headline">分类</div><div class="length-num">7</div></a></div><hr/><div class="menus_items"><div class="menus_item"><a class="site-page" href="/archives/"><i class="fa-fw fas fa-archive"></i><span> 时间线</span></a></div><div class="menus_item"><a class="site-page" href="/tags/"><i class="fa-fw fas fa-tags"></i><span> 标签</span></a></div><div class="menus_item"><a class="site-page" href="/wiki/"><i class="fa-fw fas fa-pencil-alt"></i><span> 笔记</span></a></div><div class="menus_item"><a class="site-page" href="/link/"><i class="fa-fw fas fa-link"></i><span> 友情链接</span></a></div><div class="menus_item"><a class="site-page group" href="javascript:void(0);"><i class="fa-fw fas fa-list"></i><span> 其他</span><i class="fas fa-chevron-down"></i></a><ul class="menus_item_child"><li><a class="site-page child" href="/projects/"><i class="fa-fw fas fa-boxes"></i><span> 作品</span></a></li><li><a class="site-page child" href="/files/"><i class="fa-fw fas fa-folder-open"></i><span> 文件</span></a></li></ul></div><div class="menus_item"><a class="site-page" href="/about/"><i class="fa-fw fas fa-heart"></i><span> 关于</span></a></div></div></div></div><div class="page" id="body-wrap"><header class="not-top-img" id="page-header"><nav id="nav"><span id="blog_name"><a id="site-name" href="/">王恒's Blog</a></span><div id="menus"><div id="search-button"><a class="site-page social-icon search"><i class="fas fa-search fa-fw"></i><span> 搜索</span></a></div><div class="menus_items"><div class="menus_item"><a class="site-page" href="/archives/"><i class="fa-fw fas fa-archive"></i><span> 时间线</span></a></div><div class="menus_item"><a class="site-page" href="/tags/"><i class="fa-fw fas fa-tags"></i><span> 标签</span></a></div><div class="menus_item"><a class="site-page" href="/wiki/"><i class="fa-fw fas fa-pencil-alt"></i><span> 笔记</span></a></div><div class="menus_item"><a class="site-page" href="/link/"><i class="fa-fw fas fa-link"></i><span> 友情链接</span></a></div><div class="menus_item"><a class="site-page group" href="javascript:void(0);"><i class="fa-fw fas fa-list"></i><span> 其他</span><i class="fas fa-chevron-down"></i></a><ul class="menus_item_child"><li><a class="site-page child" href="/projects/"><i class="fa-fw fas fa-boxes"></i><span> 作品</span></a></li><li><a class="site-page child" href="/files/"><i class="fa-fw fas fa-folder-open"></i><span> 文件</span></a></li></ul></div><div class="menus_item"><a class="site-page" href="/about/"><i class="fa-fw fas fa-heart"></i><span> 关于</span></a></div></div><div id="toggle-menu"><a class="site-page"><i class="fas fa-bars fa-fw"></i></a></div></div></nav></header><main class="layout" id="content-inner"><div class="recent-posts" id="recent-posts"><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/migrating-from-wordpress-to-hexo.html" title="从wordpress迁移到hexo填坑">从wordpress迁移到hexo填坑</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2018-10-22T05:50:30.000Z" title="发表于 2018-10-22 13:50:30">2018-10-22</time></span></div><div class="content">前记用了好久的wordpress，说起来上次更新还是三年前。今天本想整理总结下最近的学习，却总也打不开wp-admin后台了，看了下是vps的php进程有报错 :( 想了想wordpress这套框架虽然很好，然而好多功能对我来说并不是必要的，于是动了心思从wordpress 迁移到静态化的博客框架 hexo。当然另外一个好处就是可以用 Markdown 语法写日志了 :)
迁移过程遇到一些坑，这里做下备忘…
开始迁移安装hexo网上安装hexo的文章已经很多了，这里不再冗述，大概流程就是
1、安装nodejs
2、配置环境变量
3、npm install -g hexo-cli
4、初始化站点 hexo init blog_dir
5、修改_config.yml
导出wordpress文章因为无法打开博客的后台管理，只能在本地临时又搭建了一套wordpress 环境，这里再次坚定了迁移的决心(弄php+mysql+nginx这一套只用来写博客，太麻烦了)访问后台 – 工具 – 导出，下载导出的文件，你将得到一个 .XML 文件，这个XML文件包含全部文章、页面、评论、自定义栏目、分 ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/kuaipan-uploader-dev-share.html" title="kuaipan_uploader开发分享">kuaipan_uploader开发分享</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-05-27T05:01:02.000Z" title="发表于 2015-05-27 13:01:02">2015-05-27</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/linux/">linux</a></span></div><div class="content">
PS：将原来的一篇文章拆开了，上篇是安装使用讲解，这篇是开发过程讲解。
以前使用dropbox的linux客户端备份VPS上的文件和数据，但是近来dorpbox在国内越来越难访问，加上dropbox本身的容量只有几G，于是有了自己动刀写一个网盘的客户端，首先想到的是百度网盘，2T的巨大容量肯定是够用了！
没想到这个决定却是悲剧的开始，按照百度PCS的API文档写了半天，没想到PCS开通居然审核了一周多还不通过！ 联系客服，没想到他们的PCS API已经不审核新的申请了！再次吐槽下，你不审核，申请的时候就不能给个提示么！！！ 遂放弃！
然后就想到了还是用金山快盘吧，前段时间刚被迅雷收购，速度方面应该是没有问题。找到金山快盘的官方开放平台，看了看文档似乎是…有点麻烦啊。不过本着有难度才有挑战的原则，还是开搞了。下面介绍下开发过程中遇到的一些问题。
首先就是快盘的授权机制，本来是不太复杂，但是它的授权流程签名并不支持PLAINTEXT明文文本格式，只支持了一个HMAC-SHA1加密方式。为了处理这个签名倒是走了一些弯路。
拿到授权token的过程可以总结为三歩走：
获取未授权的 ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/kuaipan-uploader.html" title="linux版快盘上传下载脚本">linux版快盘上传下载脚本</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-05-13T09:16:39.000Z" title="发表于 2015-05-13 17:16:39">2015-05-13</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/Technical/">Technical</a></span></div><div class="content">
PS:将脚本的开发过程移动到了这里。想了解下开发步骤的可以参考~~
安装使用
此脚本适用于大部分bash环境，已经在cygwin,ubuntu14.04,debian,centos6,mac-osx等环境通过测试。
1.依赖项使用此程序前请确认你的Linux或者Cygwin支持如下命令：
curl sed awk basename date grep tr od openssl base642.配置
如果你想使用自己的app_key你需要首先注册一个金山快盘账号，然后到这里地址创建一个你自己的应用并把得到的 consumer_key、consumer_secret填写到脚本相应位置。当然此步骤可以略过，你可以直接使用脚本中填写好的consumer_key、consumer_secret，我创建的应用名称all4fun.
3.安装wget https://github.com/wujiwh/kuaipan_uploader/archive/master.zipunzip master.zipcd kuaipan_uploader-master#或者 ：git clone htt ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/ubuntu-14-04-install-configure-denyhosts.html" title="ubuntu 安装配置denyhosts">ubuntu 安装配置denyhosts</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-05-06T01:19:37.000Z" title="发表于 2015-05-06 09:19:37">2015-05-06</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/linux/">linux</a></span></div><div class="content">
DenyHosts是使用Python语言写的一个程序，它会分析sshd的日志文件（/var/log/auth.log*），当发现大量重复的攻击时会记录IP到/etc/hosts.deny文件，从而达到自动屏攻击者IP的功能。
目前官网最新版本是2.10，记得以前的ubuntu版本(<=12.04LTS)中好像直接apt-get install denyhosts 就可以了，在最新的发行版不知为何不见了。
安装
你可以前往官网http://sourceforge.net/projects/denyhost/ 选择一个你喜欢的版本下载，或者直接运行下面的命令下载。
cd /tmp/ && wget http://jaist.dl.sourceforge.net/project/denyhost/denyhost-2.10/denyhosts-2.10.tar.gz
#解压
tar xzvf denyhosts-2.10.tar.gz
#切换到目录
cd denyhosts
#安装
sudo python setup.py install
配置
经过上面这几步，基 ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/raspberry-dht11-yeekink.html" title="raspi+DHT11+yeelink监控家里温湿度">raspi+DHT11+yeelink监控家里温湿度</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-01-27T16:25:09.000Z" title="发表于 2015-01-28 00:25:09">2015-01-28</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E6%9C%80%E8%BF%91%E6%B7%BB%E5%8A%A0/">最近添加</a></span></div><div class="content">
wiring Pi 是专门为树莓派打造的类似于arduino下的wiring驱动库，安装好这个库后可以直接调用函数配置和控制GPIO功能。
我买的树莓派B+版本，如图：
可见共有个40pin的扩展 gpio，电源IO包含3.3v 5v ，接口定义如下图所示：
一、首先我们先安装开发环境#首先安装依赖包
sudo apt-get install libi2c-dev
sudo apt-get install git-core
#获取安装包
git clone git://git.drogon.net/wiringPi
cd wiringPi
git pull origin
#切换到编译目录
cd wiringPi/
#编译并安装
./build
#检查安装
gpio -v
gpio readall
执行完 gpio readall 会显示当前板子的接口定义！如下图：
比如 12 | 1 | IN | GPIO. 1 | 1 | 18
表示你用wiring库中的函数操作gpio1，其实是操作BCM格式的gpio18端口，物理的12针脚。
二、模块 ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/resolve-syntaxhighlighter-google-fonts-pop-issue.html" title="解决插件调用google字体巨慢的问题">解决插件调用google字体巨慢的问题</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-01-25T14:40:50.000Z" title="发表于 2015-01-25 22:40:50">2015-01-25</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E6%9C%80%E8%BF%91%E6%B7%BB%E5%8A%A0/">最近添加</a></span></div><div class="content">
写博客免不了贴代码，但是每次使用syntaxhighlighter 贴代码弹出的窗体总是慢的要死，加上wordpress本来也不快，卡上加卡终于无法忍受。
wordpress现在越来越臃肿常常打扰我的思路，这也是我平时经常随手将一些笔记直接扔到了vimwiki中的缘由。
查看了一下网络请求，果然又是google font的问题。好吧，活在我大天朝，只好逆来顺受了。
难道每次贴个代码都要等四五十秒。。。还是自己开刀改一下网站插件吧，祭出神器chrome网页debug工具，一顿调试之后找到原来是在tiny_mce_popup.js 这个文件的65行出现请求超时，跟进去找到对应的css 是这个
wp-includes/js/tinymce/plugins/compat3x/css/dialog.css
编辑器打开，果然啊，第一行就是：
@import url(//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,300,400,600&subset=latin-ext,latin) ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/raspberry-wifi-car-3.html" title="树莓派Wifi小车(三)">树莓派Wifi小车(三)</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-01-25T13:26:39.000Z" title="发表于 2015-01-25 21:26:39">2015-01-25</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E6%9C%80%E8%BF%91%E6%B7%BB%E5%8A%A0/">最近添加</a></span></div><div class="content">
前面1,2中我们的小车能跑了，现在在加一些有意思的功能，那就是网络摄像头，这样我们的小车就变成了一个巡逻小车啦！
首先当然你需要有一个USB摄像头，现在市面上的大部门的UVC摄像头都能直接被Linux驱动，当然raspberry也是可以的，比起windows那乱七八糟的驱动程序是不是方便很多。
如果你不确定你的摄像头能不能直接被你的树莓派识别，你可以首先执行
lsusb 看看你的摄像头vid在不在UVC协议的官方支持列表。支持列表可查看：http://linux-uvc.berlios.de/
确定好了摄像头的驱动问题，下面就是安装网络摄像头监控软件了。
常用的有motion以及mjpg-streamer这两款软件
我之前一直用的是motion 这款软件，在openwrt和NAS的软件源里面都能很容易的安装，raspberry也不例外。我们先试试motion的效果！
一、motion安装以及使用#首先更新系统软件源sudo apt-get update#升级系统软件包sudo apt-get upgrade#安装motion软件包sudo apt-get install mot ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/raspberry-wifi-car-2.html" title="树莓派Wifi小车(二)">树莓派Wifi小车(二)</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-01-25T03:17:05.000Z" title="发表于 2015-01-25 11:17:05">2015-01-25</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E6%9C%80%E8%BF%91%E6%B7%BB%E5%8A%A0/">最近添加</a></span></div><div class="content">
上篇文章 之后，继续折腾我的小车，又用C#和Android 写了两个控制客户端。
思路比较直接，使用POST请求去发送小车转向参数，然后就动起来了。C#不说了，很熟练写起来也非常简单，使用钩子捕获全局键盘，这样及时程序不在前台也能控制小车。
核心代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
namespace WangHeng.Org.PiCar
{
public partial class Ma ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/raspberry-wifi-car-1.html" title="树莓派Wifi小车(一)">树莓派Wifi小车(一)</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2015-01-24T12:43:14.000Z" title="发表于 2015-01-24 20:43:14">2015-01-24</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E6%9C%80%E8%BF%91%E6%B7%BB%E5%8A%A0/">最近添加</a></span></div><div class="content">
到年末了，最近也有了一些自己的时间。回到了原来的技术处，晚上终于不用疯狂加班了，下班回家也终于有功夫折腾自己以前想玩的玩具了: )
树莓派刚发布的时候就一直想搞一台，但是淘宝上面的价格也是一直居高不下，想想家里已经N多PC，NAS和笔记本了，一直找不到入手的理由。圣诞节附近随便一刷淘宝，发现新版本B+ 已经降到了170块，果断买下。
回家折腾了几天，性能果然弱的跟价格成正比。。。百兆的小网卡实在看不上眼。算了，从小玩意玩起吧，先装一个wifi小车。
有了想法，开始组装！ 由于之前折腾了几天Arduino对于各种驱动板已经基本熟悉，所以接线非常简单。底盘随便找了块塑料板，轮子直接双面胶+热熔胶固定，总之是很丑，好吧。。。
不怕见笑，Beta版完成图如下：
驱动板有两种，一种是L298N
主控芯片L298N包装形式盒装出货逻辑电压5V驱动电压5V-35V逻辑电流0mA-36mA驱动电流2A(MAX单桥)存储温度-20℃ 到 +135℃最大功率25W
另一种是L9110S芯片的驱动板，参数如下： 模块供电电压：2.5-12V电机工作电压2.5v-12V之间，最大工作电 ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/disable-or-replace-google-font.html" title="禁用或替换博客google字体">禁用或替换博客google字体</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2014-06-13T10:08:42.000Z" title="发表于 2014-06-13 18:08:42">2014-06-13</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E6%9C%80%E8%BF%91%E6%B7%BB%E5%8A%A0/">最近添加</a></span></div><div class="content">
由于在Wordpress中很多地方用到了google的字体，加上最近我朝又在全面禁用google的服务，直接导致了博客访问慢的无法忍受。没办法只有割爱，先临时禁用google的字体。方法如下：
方法一：在functions.php中注释掉，vim打开functions.php文件，搜索googleapis， 加//注释即可，代码如下：
function wpan_fonts() {
$protocol = is_ssl() ? ‘https’ : ‘http’;
//</strong>wp_register_style( ‘underthesea-portlligatsans’, “$protocol://fonts.googleapis.com/css?family=Port+Lligat+Sans” );
//</strong>wp_register_style( ‘underthesea-oswald’, “$protocol://fonts.googleapis.com/css?family=Oswald:400,700,300″ ) ...</div></div></div><nav id="pagination"><div class="pagination"><span class="page-number current">1</span><a class="page-number" href="/page/2/#content-inner">2</a><span class="space">…</span><a class="page-number" href="/page/9/#content-inner">9</a><a class="extend next" rel="next" href="/page/2/#content-inner"><i class="fas fa-chevron-right fa-fw"></i></a></div></nav></div><div class="aside-content" id="aside-content"><div class="card-widget card-info"><div class="is-center"><div class="avatar-img"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="/img/avatar.png" onerror="this.onerror=null;this.src='/img/friend_404.gif'" alt="avatar"/></div><div class="author-info__name">王恒</div><div class="author-info__description">make progress little day by day.</div></div><div class="card-info-data site-data is-center"><a href="/archives/"><div class="headline">文章</div><div class="length-num">86</div></a><a href="/tags/"><div class="headline">标签</div><div class="length-num">132</div></a><a href="/categories/"><div class="headline">分类</div><div class="length-num">7</div></a></div><a id="card-info-btn" target="_blank" rel="noopener" href="https://github.com/all4fun"><i class="fab fa-github"></i><span>关注</span></a></div><div class="sticky_layout"><div class="card-widget card-tags"><div class="item-headline"><i class="fas fa-tags"></i><span>标签</span></div><div class="card-tag-cloud"><a href="/tags/NET/" style="font-size: 1.1em; 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