有道字典 Chrome Extension
Dec 12th, 2011
有道字典的chrome extension会把鼠标下的词log到console里，debug的时候让人烦, 看了下code, 直接用的console.log, 发布的时候也没注释掉. 跑到~/Library/Application Support/Google/Chrome/Default/Extensions/nbndkplefmmhmcmfjanjaakhhkiegogd/1.0_0下把content.js,background.html里的console.log都注释掉，安静了。
大概看了下extension code, 发现两个有意思的地方：
- 打包的时候连.svn目录都没放过
$ svn info Path: . URL: https://dev.corp.youdao.com/svn/outfox/products/desktop/incubator/mac/GetWordExtension/Chrome/extension Repository Root: https://dev.corp.youdao.com/svn/outfox Repository UUID: 36a6777f-fe3c-0410-890b-904d6044f29d Revision: 285097 Node Kind: directory Schedule: normal Last Changed Author: huangdx Last Changed Rev: 277738 Last Changed Date: 2011-09-13 14:00:17 +0800 (二, 13 9 2011)
- 取词的时候调用的是本机有道字典app提供的http接口
//in background.html function SendResult(word, pos, type) { var s = new XMLHttpRequest; s.open("GET", "http://localhost:32445/getword?word=" + word + "&pos=" + pos + "&type=" + type, true); //console.log('sending...') s.send() };用curl试了下，可以发送请求，但响应为空
$ curl -vv 'http://localhost:32445/getword?word=for%20suppliers&pos=8&type=0' * About to connect() to localhost port 32445 (#0) * Trying ::1... Connection refused * Trying 127.0.0.1... connected * Connected to localhost (127.0.0.1) port 32445 (#0) > GET /getword?word=for%20suppliers&pos=8&type=0 HTTP/1.1 > User-Agent: curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8r zlib/1.2.5 > Host: localhost:32445 > Accept: */* > * Empty reply from server * Connection #0 to host localhost left intact curl: (52) Empty reply from server * Closing connection #0word, pos, type这三个参数只要少一个有道字典就会crash
这次http request只是一个trigger, 有道字典会向dict.youdao.com发一个request:
$ curl -vv 'http://dict.youdao.com/fsearch?q=for%20suppliers&pos=8&keyfrom=mac.scrtrans.0&id=E33EC7736AFDCABB184051CD3757CA73&vendor=cidian.youdao.com&client=macdict' * About to connect() to dict.youdao.com port 80 (#0) * Trying 61.135.218.32... connected * Connected to dict.youdao.com (61.135.218.32) port 80 (#0) > GET /fsearch?q=for%20suppliers&pos=8&keyfrom=mac.scrtrans.0&id=E33EC7736AFDCABB184051CD3757CA73&vendor=cidian.youdao.com&client=macdict HTTP/1.1 > User-Agent: curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8r zlib/1.2.5 > Host: dict.youdao.com > Accept: */* > < HTTP/1.1 200 OK < Server: nginx < Date: Tue, 13 Dec 2011 07:10:55 GMT < Content-Type: text/xml; charset=utf-8 < Connection: keep-alive < Cache-Control: private < Content-Language: en-US < Set-Cookie: OUTFOX_SEARCH_USER_ID=-447518408@123.117.56.163; domain=.youdao.com; expires=Thu, 05-Dec-2041 07:10:55 GMT < Set-Cookie: JSESSIONID=abcdjNBcCWPPK4igOq2qt; domain=youdao.com; path=/ < Vary: Accept-Encoding < Content-Length: 1477 < <?xml version="1.0" encoding="UTF-8"?> <yodaodict> <return-phrase><![CDATA[suppliers]]></return-phrase> <phonetic-symbol>sə'plaiəz</phonetic-symbol> <dictcn-speach>suppliers</dictcn-speach> <custom-translation> <type>ec</type> <translation><content><![CDATA[n. 供应商（supplier的复数）]]></content></translation> </custom-translation> <yodao-web-dict> <web-translation> <key><![CDATA[Suppliers]]></key> <trans><value><![CDATA[供应商]]></value></trans> <trans><value><![CDATA[供货商]]></value></trans> <trans><value><![CDATA[数据库]]></value></trans> </web-translation> <web-translation> <key><![CDATA[Overview Suppliers]]></key> <trans><value><![CDATA[概览]]></value></trans> <trans><value><![CDATA[供应商]]></value></trans> </web-translation> <web-translation> <key><![CDATA[select suppliers]]></key> <trans><value><![CDATA[挑选供应商]]></value></trans> </web-translation> </yodao-web-dict> <recommend><![CDATA[supplier]]></recommend> <sexp>0</sexp> </yodaodict> * Connection #0 to host dict.youdao.com left intact * Closing connection #0拿到结果后由有道字典显示一个提示窗口.
这种实现方式倒也算精巧, 其他app要用这个http接口也比较方便，只是32445端口连个http 200都不返回粗暴了点.