我們使用dmoz.org這個網(wǎng)站來作為小抓抓一展身手的對象。
首先先要回答一個問題。
問：把網(wǎng)站裝進爬蟲里，總共分幾步？
答案很簡單，四步：
新建項目 (Project)：新建一個新的爬蟲項目
明確目標（Items）：明確你想要抓取的目標
制作爬蟲（Spider）：制作爬蟲開始爬取網(wǎng)頁
存儲內(nèi)容（Pipeline）：設(shè)計管道存儲爬取內(nèi)容
好的，基本流程既然確定了，那接下來就一步一步的完成就可以了。
1.新建項目（Project）
在空目錄下按住Shift鍵右擊，選擇“在此處打開命令窗口”，輸入一下命令：
其中，tutorial為項目名稱。
可以看到將會創(chuàng)建一個tutorial文件夾，目錄結(jié)構(gòu)如下：
下面來簡單介紹一下各個文件的作用：
scrapy.cfg：項目的配置文件
tutorial/：項目的Python模塊，將會從這里引用代碼
tutorial/items.py：項目的items文件
tutorial/pipelines.py：項目的pipelines文件
tutorial/settings.py：項目的設(shè)置文件
tutorial/spiders/：存儲爬蟲的目錄
2.明確目標（Item）
在Scrapy中，items是用來加載抓取內(nèi)容的容器，有點像Python中的Dic，也就是字典，但是提供了一些額外的保護減少錯誤。
一般來說，item可以用scrapy.item.Item類來創(chuàng)建，并且用scrapy.item.Field對象來定義屬性（可以理解成類似于ORM的映射關(guān)系）。
接下來，我們開始來構(gòu)建item模型（model）。
首先，我們想要的內(nèi)容有：
名稱（name）
鏈接（url）
描述（description）
修改tutorial目錄下的items.py文件，在原本的class后面添加我們自己的class。
因為要抓dmoz.org網(wǎng)站的內(nèi)容，所以我們可以將其命名為DmozItem：
剛開始看起來可能會有些看不懂，但是定義這些item能讓你用其他組件的時候知道你的 items到底是什么。
可以把Item簡單的理解成封裝好的類對象。
3.制作爬蟲（Spider）
制作爬蟲，總體分兩步：先爬再取。
也就是說，首先你要獲取整個網(wǎng)頁的所有內(nèi)容，然后再取出其中對你有用的部分。
3.1爬
Spider是用戶自己編寫的類，用來從一個域（或域組）中抓取信息。
他們定義了用于下載的URL列表、跟蹤鏈接的方案、解析網(wǎng)頁內(nèi)容的方式，以此來提取items。
要建立一個Spider，你必須用scrapy.spider.BaseSpider創(chuàng)建一個子類，并確定三個強制的屬性：
name：爬蟲的識別名稱，必須是唯一的，在不同的爬蟲中你必須定義不同的名字。
start_urls：爬取的URL列表。爬蟲從這里開始抓取數(shù)據(jù)，所以，第一次下載的數(shù)據(jù)將會從這些urls開始。其他子URL將會從這些起始URL中繼承性生成。
parse()：解析的方法，調(diào)用的時候傳入從每一個URL傳回的Response對象作為唯一參數(shù)，負責解析并匹配抓取的數(shù)據(jù)(解析為item)，跟蹤更多的URL。
這里可以參考寬度爬蟲教程中提及的思想來幫助理解，教程傳送：[Java] 知乎下巴第5集：使用HttpClient工具包和寬度爬蟲。
也就是把Url存儲下來并依此為起點逐步擴散開去，抓取所有符合條件的網(wǎng)頁Url存儲起來繼續(xù)爬取。
下面我們來寫第一只爬蟲，命名為dmoz_spider.py，保存在tutorial\spiders目錄下。
dmoz_spider.py代碼如下：
allow_domains是搜索的域名范圍，也就是爬蟲的約束區(qū)域，規(guī)定爬蟲只爬取這個域名下的網(wǎng)頁。
從parse函數(shù)可以看出，將鏈接的最后兩個地址取出作為文件名進行存儲。
然后運行一下看看，在tutorial目錄下按住shift右擊，在此處打開命令窗口，輸入：
運行結(jié)果如圖：
報錯了：
UnicodeDecodeError: 'ascii' codec can't decode byte 0xb0 in position 1: ordinalnot in range(128)
運行第一個Scrapy項目就報錯，真是命運多舛。
應該是出了編碼問題，谷歌了一下找到了解決方案：
在python的Lib\site-packages文件夾下新建一個sitecustomize.py：
再次運行，OK，問題解決了，看一下結(jié)果：
最后一句INFO: Closing spider (finished)表明爬蟲已經(jīng)成功運行并且自行關(guān)閉了。
包含 [dmoz]的行 ，那對應著我們的爬蟲運行的結(jié)果。
可以看到start_urls中定義的每個URL都有日志行。
還記得我們的start_urls嗎？
http://www.dmoz.org/Computers/Programming/Languages/Python/Bookshttp://www.dmoz.org/Computers/Programming/Languages/Python/Resources
因為這些URL是起始頁面，所以他們沒有引用(referrers)，所以在它們的每行末尾你會看到 (referer: )。
在parse 方法的作用下，兩個文件被創(chuàng)建：分別是 Books 和 Resources，這兩個文件中有URL的頁面內(nèi)容。
那么在剛剛的電閃雷鳴之中到底發(fā)生了什么呢？
首先，Scrapy為爬蟲的 start_urls屬性中的每個URL創(chuàng)建了一個 scrapy.http.Request 對象 ，并將爬蟲的parse 方法指定為回調(diào)函數(shù)。
然后，這些 Request被調(diào)度并執(zhí)行，之后通過parse()方法返回scrapy.http.Response對象，并反饋給爬蟲。
3.2取
爬取整個網(wǎng)頁完畢，接下來的就是的取過程了。
光存儲一整個網(wǎng)頁還是不夠用的。
在基礎(chǔ)的爬蟲里，這一步可以用正則表達式來抓。
在Scrapy里，使用一種叫做 XPath selectors的機制，它基于 XPath表達式。
如果你想了解更多selectors和其他機制你可以查閱相關(guān)資料。
這是一些XPath表達式的例子和他們的含義
/html/head/title: 選擇HTML文檔
元素下面的
<a target="_blank"><u>標簽</u></a>。</p>
<p style="text-indent: 2em;">
/html/head/title/text(): 選擇前面提到的<title> 元素下面的文本內(nèi)容</p>
<p style="text-indent: 2em;">
//td: 選擇所有 <td> 元素</p>
<p style="text-indent: 2em;">
//div[@class="mine"]: 選擇所有包含 class="mine" 屬性的div 標簽元素</p>
<p style="text-indent: 2em;">
以上只是幾個使用XPath的簡單例子，但是實際上XPath非常強大。</p>
<p style="text-indent: 2em;">
為了方便使用XPaths，Scrapy提供XPathSelector 類，有兩種可以選擇，HtmlXPathSelector(HTML數(shù)據(jù)解析)和XmlXPathSelector(XML數(shù)據(jù)解析)。</p>
<p style="text-indent: 2em;">
必須通過一個 Response 對象對他們進行實例化操作。</p>
<p style="text-indent: 2em;">
你會發(fā)現(xiàn)Selector對象展示了文檔的節(jié)點結(jié)構(gòu)。因此，第一個實例化的selector必與根節(jié)點或者是整個目錄有關(guān) 。</p>
<p style="text-indent: 2em;">
在Scrapy里面，Selectors 有四種基礎(chǔ)的方法（點擊查看API文檔）：</p>
<p style="text-indent: 2em;">
xpath()：返回一系列的selectors，每一個select表示一個xpath參數(shù)表達式選擇的節(jié)點</p>
<p style="text-indent: 2em;">
css()：返回一系列的selectors，每一個select表示一個css參數(shù)表達式選擇的節(jié)點</p>
<p style="text-indent: 2em;">
extr<a target="_blank"><u>ac</u></a>t()：返回一個unicode字符串，為選中的數(shù)據(jù)</p>
<p style="text-indent: 2em;">
re()：返回一串一個unicode字符串，為使用正則表達式抓取出來的內(nèi)容</p>
<p style="text-indent: 2em;">
3.3xpath實驗</p>
<p style="text-indent: 2em;">
下面我們在Shell里面嘗試一下Selector的用法。</p>
<p style="text-indent: 2em;">
實驗的網(wǎng)址：http://www.dmoz.org/Computers/Programming/Languages/Python/Books/</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3OAMag2AAB7_dZ30Cg048.png" /></p>
<p style="text-indent: 2em;">
熟悉完了實驗的小白鼠，接下來就是用Shell爬取網(wǎng)頁了。</p>
<p style="text-indent: 2em;">
進入到項目的頂層目錄，也就是第一層tutorial文件夾下，在cmd中輸入：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3OAUgvEAAAvjyHSf78514.png" /></p>
<p style="text-indent: 2em;">
回車后可以看到如下的內(nèi)容：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3SATik7AAHbS5Z2YkQ587.png" /></p>
<p style="text-indent: 2em;">
在Shell載入后，你將獲得response回應，存儲在本地變量 response中。</p>
<p style="text-indent: 2em;">
所以如果你輸入response.body，你將會看到response的body部分，也就是抓取到的頁面內(nèi)容：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3aAFYdPAALND72cYfk023.png" /></p>
<p style="text-indent: 2em;">
或者輸入response.headers 來查看它的 header部分：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3mAe8tVAALBJa2ARnE086.png" /></p>
<p style="text-indent: 2em;">
現(xiàn)在就像是一大堆沙子握在手里，里面藏著我們想要的金子，所以下一步，就是用篩子搖兩下，把雜質(zhì)出去，選出關(guān)鍵的內(nèi)容。</p>
<p style="text-indent: 2em;">
selector就是這樣一個篩子。</p>
<p style="text-indent: 2em;">
在舊的版本中，Shell實例化兩種selectors，一個是解析HTML的 hxs 變量，一個是解析XML 的 xxs 變量。</p>
<p style="text-indent: 2em;">
而現(xiàn)在的Shell為我們準備好的selector對象，sel，可以根據(jù)返回的數(shù)據(jù)類型自動選擇最佳的解析方案(XML or HTML)。</p>
<p style="text-indent: 2em;">
然后我們來搗弄一下！~</p>
<p style="text-indent: 2em;">
要徹底搞清楚這個問題，首先先要知道，抓到的頁面到底是個什么樣子。</p>
<p style="text-indent: 2em;">
比如，我們要抓取網(wǎng)頁的標題，也就是<title>這個標簽：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3mAYZubAAAMzxt2yJ4194.png" /></p>
<p style="text-indent: 2em;">
可以輸入：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3mAdRyfAAAHpvVtoOo344.png" /></p>
<p style="text-indent: 2em;">
結(jié)果就是：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3qAQejMAAAvPB0_p9g042.png" /></p>
<p style="text-indent: 2em;">
這樣就能把這個標簽取出來了，用extract()和text()還可以進一步做處理。</p>
<p style="text-indent: 2em;">
備注：簡單的羅列一下有用的xpath路徑表達式：</p>
<p style="text-indent: 2em;">
表達式</p>
<p style="text-indent: 2em;">
描述</p>
<p style="text-indent: 2em;">
nodename 選取此節(jié)點的所有子節(jié)點。 </p>
<p style="text-indent: 2em;">
/ 從根節(jié)點選取。 </p>
<p style="text-indent: 2em;">
// 從匹配選擇的當前節(jié)點選擇文檔中的節(jié)點，而不考慮它們的位置。 </p>
<p style="text-indent: 2em;">
. 選取當前節(jié)點。 </p>
<p style="text-indent: 2em;">
.. 選取當前節(jié)點的父節(jié)點。 </p>
<p style="text-indent: 2em;">
@ 選取屬性。 </p>
<p style="text-indent: 2em;">
全部的實驗結(jié)果如下，In[i]表示第i次實驗的輸入，Out[i]表示第i次結(jié)果的輸出：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3qAVtJSAABq5y-5nTo180.png" /></p>
<p style="text-indent: 2em;">
當然title這個標簽對我們來說沒有太多的價值，下面我們就來真正抓取一些有意義的東西。</p>
<p style="text-indent: 2em;">
使用火狐的審查元素我們可以清楚地看到，我們需要的東西如下：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3uAdCiqAABSVCIAudw253.png" /></p>
<p style="text-indent: 2em;">
我們可以用如下代碼來抓取這個<li>標簽：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3uAEGbvAAAGwo7Xx3w887.png" /></p>
<p style="text-indent: 2em;">
從<li>標簽中，可以這樣獲取網(wǎng)站的描述：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3yAVaxqAAALDd45q6Y420.png" /></p>
<p style="text-indent: 2em;">
可以這樣獲取網(wǎng)站的標題：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3yALz5oAAALFMU58tc217.png" /></p>
<p style="text-indent: 2em;">
可以這樣獲取網(wǎng)站的超鏈接：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3yAb7ArAAALbImHF8A623.png" /></p>
<p style="text-indent: 2em;">
當然，前面的這些例子是直接獲取屬性的方法。</p>
<p style="text-indent: 2em;">
我們注意到xpath返回了一個對象列表，</p>
<p style="text-indent: 2em;">
那么我們也可以直接調(diào)用這個列表中對象的屬性挖掘更深的節(jié)點</p>
<p style="text-indent: 2em;">
（參考：Nesting selectorsandWorking with relative XPathsin theSelectors）：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3yAKXYOAAAFlcs_O2Q945.png" /></p>
<p style="text-indent: 2em;">
3.4xpath實戰(zhàn)</p>
<p style="text-indent: 2em;">
我們用shell做了這么久的實戰(zhàn)，最后我們可以把前面學習到的內(nèi)容應用到dmoz_spider這個爬蟲中。</p>
<p style="text-indent: 2em;">
在原爬蟲的parse函數(shù)中做如下修改：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK32APDm_AABf9RQ21Ug644.png" /></p>
<p style="text-indent: 2em;">
注意，我們從scrapy.selector中導入了Selector類，并且實例化了一個新的Selector對象。這樣我們就可以像Shell中一樣操作xpath了。</p>
<p style="text-indent: 2em;">
我們來試著輸入一下命令運行爬蟲（在tutorial根目錄里面）：</p>
<p style="text-indent: 2em;">
scrapy crawl dmoz</p>
<p style="text-indent: 2em;">
運行結(jié)果如下：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK36Acd2dAAFYpLNs00Y419.png" /></p>
<p style="text-indent: 2em;">
果然，成功的抓到了所有的標題。但是好像不太對啊，怎么Top，Python這種導航欄也抓取出來了呢？</p>
<p style="text-indent: 2em;">
我們只需要紅圈中的內(nèi)容：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK36AOjgYAACr0aW5qJA726.png" /></p>
<p style="text-indent: 2em;">
看來是我們的xpath語句有點問題，沒有僅僅把我們需要的項目名稱抓取出來，也抓了一些無辜的但是xpath語法相同的元素。</p>
<p style="text-indent: 2em;">
審查元素我們發(fā)現(xiàn)我們需要的<ul>具有class='directory-url'的屬性，</p>
<p style="text-indent: 2em;">
那么只要把xpath語句改成sel.xpath('//ul[@class="directory-url"]/li')即可</p>
<p style="text-indent: 2em;">
將xpath語句做如下調(diào)整：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK3-ACJoMAABs7DrGtok960.png" /></p>
<p style="text-indent: 2em;">
成功抓出了所有的標題，絕對沒有濫殺無辜：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK4CAHGdkAAGerLsr9Lo332.png" /></p>
<p style="text-indent: 2em;">
3.5使用Item</p>
<p style="text-indent: 2em;">
接下來我們來看一看如何使用Item。</p>
<p style="text-indent: 2em;">
前面我們說過，Item 對象是自定義的python字典，可以使用標準字典語法獲取某個屬性的值：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK4GASXyKAAAbv4i09k4540.png" /></p>
<p style="text-indent: 2em;">
作為一只爬蟲，Spiders希望能將其抓取的數(shù)據(jù)存放到Item對象中。為了返回我們抓取數(shù)據(jù)，spider的最終代碼應當是這樣:</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK4GASocHAACB7Ri1uLE782.png" /></p>
<p style="text-indent: 2em;">
4.存儲內(nèi)容（Pipeline）</p>
<p style="text-indent: 2em;">
保存信息的最簡單的方法是通過Feed exports，主要有四種：JSON，JSON lines，CSV，XML。</p>
<p style="text-indent: 2em;">
我們將結(jié)果用最常用的JSON導出，命令如下：</p>
<p style="text-indent: 2em;">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK4GAHhJ1AAAJ_lLGWaQ037.png" /></p>
<p style="text-indent: 2em;">
-o 后面是導出文件名，-t 后面是導出類型。</p>
<p style="text-indent: 2em;">
然后來看一下導出的結(jié)果，用文本編輯器打開json文件即可（為了方便顯示，在item中刪去了除了title之外的屬性）：</p>
<p align="center">
<img src="http://file.elecfans.com/web1/M00/7D/BB/pIYBAFwKK4KACVqfAAIE9eyo2bQ297.png" /></p>
<p style="text-indent: 2em;">
因為這個只是一個小型的例子，所以這樣簡單的處理就可以了。</p>
<p style="text-indent: 2em;">
如果你想用抓取的items做更復雜的事情，你可以寫一個 Item Pipeline(條目管道)。</p>
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<dd><a target="_blank" >評測試用</a></dd>
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<dd><a target="_blank" >產(chǎn)品</a></dd>
<dd><a target="_blank" >資料</a></dd>
<dd><a target="_blank" >文章</a></dd>
<dd><a target="_blank" >方案</a></dd>
<dd><a target="_blank" >企業(yè)</a></dd>
</dl>
<dl>
<dt>供應鏈服務</dt>
<dd><a target="_blank" href="http://www.xsypw.cn/kf/">硬件開發(fā)</a></dd>
<dd><a target="_blank" >華秋電路</a></dd>
<dd><a target="_blank" >華秋商城</a></dd>
<dd><a target="_blank" >華秋智造</a></dd>
<dd><a target="_blank" >nextPCB</a></dd>
<dd><a target="_blank" >BOM配單</a></dd>
<dt>媒體服務</dt>
<dd><a target="_blank" href="http://www.xsypw.cn/about/service.html">網(wǎng)站廣告</a></dd>
<dd><a target="_blank" >在線研討會</a></dd>
<dd><a target="_blank" >活動策劃</a></dd>
<dd><a target="_blank" href="http://www.xsypw.cn/news/">新聞發(fā)布</a></dd>
<dd><a target="_blank" href="http://www.xsypw.cn/xinpian/ic/">新品發(fā)布</a></dd>
<dd><a target="_blank" href="http://www.xsypw.cn/quiz/">小測驗</a></dd>
<dd><a target="_blank" href="http://www.xsypw.cn/contest/">設(shè)計大賽</a></dd>
</dl>
<dl>
<dt>華秋</dt>
<dd><a target="_blank" href="http://www.xsypw.cn/about/" rel="nofollow">關(guān)于我們</a></dd>
<dd><a target="_blank" rel="nofollow">投資關(guān)系</a></dd>
<dd><a target="_blank" rel="nofollow">新聞動態(tài)</a></dd>
<dd><a target="_blank" href="http://www.xsypw.cn/about/zhaopin.html" rel="nofollow">加入我們</a></dd>
<dd><a target="_blank" href="http://www.xsypw.cn/about/contact.html" rel="nofollow">聯(lián)系我們</a></dd>
<dd><a target="_blank" href="/about/tousu.html" rel="nofollow">舉報投訴</a></dd>
<dt>社交網(wǎng)絡(luò)</dt>
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<dt>移動端</dt>
<dd><a target="_blank" href="http://www.xsypw.cn/app/">發(fā)燒友APP</a></dd>
<dd><a target="_blank" >硬聲APP</a></dd>
<dd><a target="_blank" >WAP</a></dd>
</dl>
<dl>
<dt>聯(lián)系我們</dt>
<dd class="small_tit">廣告合作</dd>
<dd>王婉珠：<a href="mailto:wangwanzhu@elecfans.com">wangwanzhu@elecfans.com</a></dd>
<dd class="small_tit">內(nèi)容合作</dd>
<dd>黃晶晶：<a href="mailto:huangjingjing@elecfans.com">huangjingjing@elecfans.com</a></dd>
<dd class="small_tit">內(nèi)容合作（海外）</dd>
<dd>張迎輝：<a href="mailto:mikezhang@elecfans.com">mikezhang@elecfans.com</a></dd>
<dd class="small_tit">供應鏈服務 PCB/IC/PCBA</dd>
<dd>江良華：<a href="mailto:lanhu@huaqiu.com">lanhu@huaqiu.com</a></dd>
<dd class="small_tit">投資合作</dd>
<dd>曾海銀：<a href="mailto:zenghaiyin@huaqiu.com">zenghaiyin@huaqiu.com</a></dd>
<dd class="small_tit">社區(qū)合作</dd>
<dd>劉勇：<a href="mailto:liuyong@huaqiu.com">liuyong@huaqiu.com</a></dd>
</dl>
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<li>
<p>關(guān)注我們的微信</p>
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</li>
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<p>電子發(fā)燒友觀察</p>
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<a href="http://www.xsypw.cn/">電子發(fā)燒友</a>
<a href="http://www.xsypw.cn/" target="_blank"><strong>（電路圖）</strong></a>
<a target="_blank" rel="nofollow">湘公網(wǎng)安備43011202000918</a>
<!-- <a href="http://www.xsypw.cn/about/edi.html" target="_blank">電信與信息服務業(yè)務經(jīng)營許可證：合字B2-20210191</a> -->
<a target="_blank" rel="nofollow">
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</a>
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(function () {
postmessageScript()
function postmessageScript() {
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* postmessage
*/
var con_net = ""
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} else {
con_net = "com"
}
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://passport.elecfans.' + con_net + '/public/pc/plugin/postmessage.js';
var body = document.getElementsByTagName("body").item(0);
body.appendChild(script);
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/*
* 推薦文章無圖時樣式修改
* */
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$(this).parent().css('padding-left', '0px');
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bdText: '', //自定義分享內(nèi)容
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bdPic: ''
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share: [{
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}]
}
with(document) 0[(getElementsByTagName('head')[0] || body).appendChild(createElement('script')).src = ''];
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var add_url = '/d/article/write/';
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})
}
function CheckLogin() {
//alert(11)
now_uid = '';
var ElecfansApi_checklogin = '/webapi/passport/checklogin';
var logout_url = "/d/login/logout.html";
var logout_url = 'https://bbs.elecfans.com/member.php?mod=logging&action=logout&refer=front';
$.get(ElecfansApi_checklogin, function (data, textStatus) {
if (data != "") {
EchoLoginInfo(data);
CheckEmailInfo(data);
data = $.parseJSON(data);
now_uid = data.uid;
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now_uid + '/"><img src="' + data.avatar + '" width="33" height="33" /> <strong>' + data
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logout_url + '" ><i class="icon-switch"></i> 退出</a></div></div>';
$('#login_area').html(login_content);
var win_width = $(window).width();
if (win_width > 1000) {
$("#mine").mouseDelay(200).hover(function () {
$("#mymenu").show();
}, function () {
$("#mymenu").hide();
});
};
$('.newheader2021_tip_msg .tip_msg_num').text(data.msgnum).css({
'display': 'inline'
});
$('.no_login_2021').hide();
$('.yes_login_2021_more').css({
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});
$('.yes_login_2021').attr('href', 'https://bbs.elecfans.com/user/' + data.uid);
$('.yes_login_2021 .vtm').attr('src', data.avatar);
var yesLoginMoreBox = $('.yes_login_2021_more_box');
yesLoginMoreBox.find('.header_logo_2021').attr('href', 'https://bbs.elecfans.com/user/' + data
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yesLoginMoreBox.find('.header_logo_2021 img').attr('src', data.avatar);
yesLoginMoreBox.find('.header_logo_right_2021').attr('href', 'https://bbs.elecfans.com/user/' +
data.uid);
yesLoginMoreBox.find('.usename_href_2021').attr('href', 'https://bbs.elecfans.com/user/' + data
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$(".header_bottom_2021 .favorite_articles_2021").attr("href", "https://bbs.elecfans.com/user/" +
data.uid + "/favorite_articles?from=daohang");
$(".header_bottom_2021 .spacecp_2021").attr("href",
"https://bbs.elecfans.com/home.php?mod=space&uid=" + data.uid +
"&do=profile&from=daohang");
if (data.vip == 1) {
yesLoginMoreBox.find('.header_VIP_2021').hide();
yesLoginMoreBox.find('.vip_icon img').attr('src',
'https://skin.elecfans.com/images/2021-soft/vip_icon2.png');
};
} else {
remainLog();
var content =
'<a class="item special-login " href="javascript:;" title="">登錄</a><a class="item" target="_blank">注冊</a>';
$('#login_area').html(content);
//.send-write,.absolute-write
$(".special-login").click(function (e) {
$.tActivityLogin();
return false;
});
$('.no_login_2021').click(function () {
$.ssoDialogLogin();
})
}
});
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var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
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'<div id="a5mgapgs4i" class="fl LogBgPart">' +
'<h3>電子發(fā)燒友</h3> ' +
'<p>中國電子工程師最喜歡的網(wǎng)站</p> ' +
'<ul>' +
'<li>與<span id="downNum">2931785</span>位工程師會員交流學習</li>' +
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});
setTimeout(function () {
var netHost = window.location.host.split(".");
$.ajax({
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$(function () {
var follow_wrap = $(".author-collect");
var now_uid = "";
var face_src = "";
var getFollowNum = $(".followNum strong").html();
//關(guān)注
$(window).on('click', '.author-collect', function () {
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$.tActivityLogin();
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action:'follow'
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follow_wrap.html('已關(guān)注').attr('id', 'cancelFollow').addClass(
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}else{
alert(data.msg);
}
});
}else{
$.post('/webapi/home/evipArticle/followEvip',{
evip_id : $(".evip_id").val(),
action:'cancel' }, function (data) {
//返回的數(shù)據(jù)格式：
if (data.code == "0") {
follow_wrap.html('關(guān)注').attr('id', 'follow').removeClass(
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}else{
alert(data.msg);
}
});
}
}else{
if ($(this).attr('id') == 'follow') {
$.post('/d/user/follow', {
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//返回的數(shù)據(jù)格式：
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$(".followNum strong").html(++getFollowNum);
// follow_wrap.html('已關(guān)注').attr('id','cancelFollow').css('background','#999');
follow_wrap.html('已關(guān)注').attr('id', 'cancelFollow').addClass(
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var follow_user = '<a href="/d/user/' + now_uid + '/" data-uid="' +
now_uid + '" class="face" rel="nofollow"><img src="' + face_src +
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$('#follow_list').append(follow_user);
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if (data.status == "failed") {
alert(data.msg);
}
});
}else{
$.post('/d/user/cancelFollow',{tuid: article_user_id }, function (data) {
//返回的數(shù)據(jù)格式：
if (data.status == "successed") {
// follow_wrap.html('關(guān)注').attr('id', 'follow').css('background', '#f90');
follow_wrap.html('關(guān)注').attr('id', 'follow').removeClass(
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$(".followNum strong").html(--getFollowNum);
$('#follow_list .face').each(function () {
var target_uid = $(this).attr('data-uid');
if (target_uid == now_uid) {
$(this).remove();
}
})
}
if (data.status == "failed") {
alert(data.msg);
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}
});
});
// 綁定手機號
$(".send-write").click(function () {
$.ajax({
url: '/webapi/passport/checklogin',
type: "get",
dataType: 'json',
success: function (login) {
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$.ssoDialogLogin();
} else {
isVerification(function () {
window.open("/d/article/write/")
})
}
}
})
});
/*
* ********: 驗證手機號
* callback: 驗證成功的回調(diào)函數(shù)
*/
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// })
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var passport = null;
var bbs_host = null;
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python爬蟲框架Scrapy實戰(zhàn)案例！