百度嵌入式站内搜索https化实践分享

yun

百度站内嵌入式搜索，相信很多网站都已经用了有一段时间了。可惜在百度自己大力提倡网站https化的同时，百度的周边产品却自己打脸了，完全跟不上进度。


不得不说，百度这个嵌入式站内搜索给了网站更多的DIY遐想，让搜索更加贴合各种主题

这玩意好是好，但是不支持https！不过，我们可以有多种办法来变相实现。比如，利用七牛将百度分享https化、利用七牛将百度打赏https化，貌似七牛无所不能哦？
这里，当然也是可以利用七牛来解决问题，但是我并不想“邯郸学步”，所以这里打算用Nginx来实现。

一、改造原理Ps：只求结果，不求过程的朋友请忽略此段啰嗦内容！
由于百度站内嵌入式搜索不支持https，那么就算把主js（iframe.js）本地化或者七牛化，也只是这一个文件实现了https！从这个js加载出来的图片等各种资源却还是调用的百度的http资源！因此，我们得分析这个js会调用的资源，然后全部https化。

百度嵌入式搜索其实就一个主js：http://zhannei.baidu.com/static/js/iframe.js，我们把它下载到本地，然后将其中的百度静态域名全部清空，只保留相对路径。比如：http://zhannei.baidu.com/customer_search/***，我们需要删除协议和域名部分，改成 /customer_search/*** 这种相对路径，这样我们才可以实现 Nginx 反代，七牛也是一样原理。

可能，光从肉眼去看js具体调用了哪些静态资源是比较困难苦逼的，这是我们可以将js上传到本地，然后将百度嵌入式代码改成本地js，刷新前台的时候就可以在F12控制台去看某某资源因为不是https被拦截了，这样就知道哪些资源还需要继续改造了！

二、改造代码既然分享，说明第一步的苦逼工作也已经做过了，直接分享代码：

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c,e,f,g,h,i,j,k;w(y),c=document.createElement("div"),c.className="bcse-wn-card",c.id="bdcsWnCard",document.body.appendChild(c),c.innerHTML=x,e=r("bcse-card-query")[0],e.innerHTML=a["query"],e.setAttribute("title",a["query"]),f=r("bcse-card-first-link")[0],f.innerHTML=a["results"][0]["title"].replace(/<em>/g,"").replace(/<\/em>/g,""),f.setAttribute("title",a["results"][0]["title"].replace(/<em>/g,"").replace(/<\/em>/g,"")),f.setAttribute("href",a["results"][0]["url"]),g=r("bcse-card-next-link")[0],g.innerHTML=a["results"][1]["title"].replace(/<em>/g,"").replace(/<\/em>/g,""),g.setAttribute("title",a["results"][1]["title"].replace(/<em>/g,"").replace(/<\/em>/g,"")),g.setAttribute("href",a["results"][1]["url"]),h=r("bcse-card-result-abstract")[0],h.innerHTML=a["results"][0]["abstract"].replace(/<em>/g,"").replace(/<\/em>/g,""),i=document.getElementById("bdcsCardFrame"),a["results"][0]["img"]?i.setAttribute("src","/static/customer-search/html/wncard.html?a="+a["results"][0]["url"]+"&q="+r("bcse-card-query")[0].getAttribute("title")+"&s="+d+"&p="+window.location.href+"&t="+b+"#"+a["results"][0]["img"]):i.style.display="none",window.bdcsMncardMtd=1,window.bdcsMncardReady=1,j=document.documentElement.scrollTop||document.body.scrollTop,k=Math.max(document.documentElement.scrollHeight,document.body.clientHeight),j>=(k-document.documentElement.clientHeight)/2&&1===window.bdcsMncardMtd&&(document.getElementById("bdcsWnCard").style.display="block",document.getElementById("bdcsWnCard").style.left=0),this.bind(b)},f.prototype.bind=function(f){s(r("bcse-card-close")[0],"click",function(){document.getElementById("bdcsWnCard").style.display="none",window.bdcsMncardMtd=0}),window.onscroll=function(){var d=document.documentElement.scrollTop||document.body.scrollTop,g=Math.max(document.documentElement.scrollHeight,document.body.clientHeight),h=document.getElementById("bdcsWnCard");d>=(g-document.documentElement.clientHeight)/2&&1===window.bdcsMncardMtd&&1===window.bdcsMncardReady&&1===b?(h.style.display="block",c(f)):d<(g-document.documentElement.clientHeight)/2&&1===window.bdcsMncardReady&&1===a&&e()};for(var g=0;g<document.getElementById("bdcsWnCard").getElementsByTagName("a").length;g++)s(document.getElementById("bdcsWnCard").getElementsByTagName("a")[g],"click",function(){var c,b=this.getAttribute("href");t.send("/customer_search/click",c,{query:r("bcse-card-query")[0].getAttribute("title"),url:b,log_type:"wn-card-click",site_id:d,plate_url:window.location.href,type:f,from:"iframe",cpos:this.getAttribute("cpos")?this.getAttribute("cpos"):3})})},f}(),function(){var g,i,k,l,m,n,o,p,q,r,s,t,u,v,w,b=[],c=[],e=0,f={s:d,locUrl:window.location.href},h=document.referrer;if(h){if(l={},decodeURIComponent(h)&&(i=decodeURIComponent(h)),k=i.split("?"),k[1])for(m=k[1].split("&"),n=0;n<m.length;n++)o=m[n].split("=")[0],p=m[n].split("=")[1],o&&p&&(l[o]=p);q=/www\.baidu\.com/,r=/cse\/search/,q.test(i)&&l["eqid"]?(f["eqid"]=l["eqid"],g=1):r.test(i)&&l["q"]&&(f["q"]=l["q"],g=2)}if(!f["q"]){for(s=document.getElementsByTagName("meta"),t="",u=[],v=[],n=0;n<s.length;n++)s[n].getAttribute("name")&&s[n].getAttribute("content")&&"keywords"===s[n].getAttribute("name").toLowerCase()&&(u=s[n].getAttribute("content").split(/,| |、|;|，/));if(u.length>0){for(n=0;n<u.length;n++)""!==u[n]&&v.push(u[n]);v.length>0&&(t=v[0],1!==g&&(g=3))}""===t&&document.title&&(t=document.title,1!==g&&(g=4)),""!==t&&(f["q"]=t)}for(w=0;w<c.length;w++)window.location.href===c[w]&&(e=1);for(n=0;n<b.length;n++)window.location.href.indexOf(b[n])>=0&&0===e&&0===j()&&!document.getElementById("bdcsWnCard")&&(f["q"]||f["eqid"])&&(a.init(),a.get({url:"/api/customsearch/search",parameters:f,success:function(a){a&&0===a.error&&a.results.length>1&&new z({data:a,qType:g})}}))}()}();

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将以上代码保存为js文件，比如 baidusearch.js ，然后上传到服务器网站目录，（推荐放于主题下，比如：/wp-content/themes/begin/js/baidusearch.js）

然后，将百度站内嵌入式搜索代码中的iframe.js地址替换为以上js地址，到此完成网站代码部分改造：

1. <div id="bdcs-frame-box"></div>
   
2. <script type="text/javascript">
   
3. var bdcsFrameSid="此处填写你的百度站内搜索ID";
   
4. var bdcsFrameCharset= "utf-8";
   
5. var bdcsFrameWidth = 650; //宽度请自行调整
   
6. var bdcsFrameHeight = 0;
   
7. var bdcsFrameWt = 1;
   
8. var bdcsFrameHt = 2;
   
9. var bdcsFrameResultNum = 20;
   
10. var bdcsFrameBgColor = "#fff";
    
11. var bdcsRecommend = 0;
    
12. var bdcsDefaultQuery = 0;
    
13. var bdcsRemoveUrl = 0;
    
14. </script>
    
15. <!-- 按照实际情况修改下面js地址 -->
    
16. <script type="text/javascript" src="/wp-content/themes/begin/js/baidusearch.js"></script>

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三、反向代理第二步还只是将相关资源全部指向了本地，所以下面需要改造Nginx，将这些指向全部反代到百度站内搜索，修改很简单，将以下Nginx代码添加到网站Nginx配置的 location / { 之前：

1.     location ~* /static/img/ {
   
2.         proxy_pass http://zhannei.baidu.com;
   
3.         proxy_redirect off;
   
4.         #支持purge缓存的环境可以取消以下三行注释，让资源缓存到服务器，注意cache_oneg改成实际名称
   
5.         #proxy_cache cache_one;
   
6.         #proxy_cache_valid 200 302 304 7d;
   
7.         #proxy_cache_valid any 1m;
   
8.     }
   
9.    
   
10.     location ~* ^/(cse|static|api) {
    
11.         proxy_pass http://zhannei.baidu.com;
    
12.         proxy_redirect off;
    
13.         #支持purge缓存的环境可以取消以下三行注释，让资源缓存到服务器，注意cache_oneg改成实际名称
    
14.         #proxy_cache cache_one;
    
15.         #proxy_cache_valid 200 302 304 7d;
    
16.         #proxy_cache_valid any 1m;
    
17.         expires max;
    
18.     }
    
19. 
    
20.     location ~* "customer(.+)search" {
    
21.         proxy_pass http://znsv.baidu.com;
    
22.         proxy_redirect off;
    
23.         #支持purge缓存的环境可以取消以下三行注释，让资源缓存到服务器，注意cache_oneg改成实际名称
    
24.         #proxy_cache cache_one;
    
25.         #proxy_cache_valid 200 302 304 7d;
    
26.         #proxy_cache_valid any 1m;
    
27.         expires max;
    
28. 
    
29.         }

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如果，Nginx集成了ngx_cache_purge 缓存模块，那么可以将上述代码中的缓存规则打开，避免每次搜索还要到百度去请求资源！
规则添加后，重启或重载Nginx即可生效。这时候，https前台就能正常使用百度嵌入式站内搜索了！

四、更多花絮https实现了，但是还是有些瑕疵，那就是搜索结果中缩略图默认使用https协议，可能会被浏览器拦截。在张戈博客应用这个改造后，发现大部分缩略图居然返回403禁止了，仔细看了下，大部分如下形式：
http://i8.baidu.com/it/u=1582249672,3936911246&fm=85&s=6BAAA3475C1300C649B5710B0100E09

看来是百度站内搜索zhannei.baidu.com开启了防盗链机制，自己不支持https，还不让别人改造么？于是直接给站内搜索管理员发了一份邮件

目前，站内搜索确实取消防盗链了，虽然管理员牛逼哄哄的也没回我邮件。。。
虽然不再禁止访问了，但里面的图片依然是http协议的，严格的浏览器还是会禁止加载，不过对于完全不能用来说，这个瑕疵还算可以忍受！