What to consider first when designing a meta-search engine using Erlang, Mnesia and Yaws?_问答_开发者

What to consider first when designing a meta-search engine using Erlang, Mnesia and Yaws?

开发者 https://www.devze.com 2023-02-13 21:16 出处：网络

Can someone explain to me what to consider first when designing a meta-search engine using Erlang, Mnesia and the Yaws web server? This engine should have SMS capability but I am still wondering how I

The meta search engine, you need REST or Ajax APIs from Google, Yahoo and Bing. Below am providing you with examples which you may use within your back end HTTP capable Library or your front end JavaScript. I personally use mochiweb and yaws Appmods. For example: Google has an Ajax search API which works like this:

http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=computers

Hitting that URL will give you a JSON Object which contains several search responses. In this case, the search term is "computers"
Yahoo has what it calls Boss APIs. An example of Yahoo Rest search API using Boss is here below:

For an XML result: 

http://boss.yahooapis.com/ysearch/web/v1/animals?appid=APPID&format=xml&start=1&count=3

For a Json result:

http://boss.yahooapis.com/ysearch/web/v1/animals?appid=APPID&format=json&start=1&count=3

Analyse the whole HTTP GET query very well, you notice something they call an APPID. This you will get when you register with them here. I cannot give to you my APPID, you will have to get yours,then paste it in there and you will be good to go. Yahoo has something more powerful called
YQL. In the above query, the search term is: "animals"
Bing as well has got an API for you, but you will need an APPID:

http://api.bing.net/json.aspx?AppId=APPID&Query=love&Sources=Web&Version=2.0&Market=en-us&Web.Count=10

Above, the search term is: "love"

About the Meta Search Engine

You have a web page, people enter search queries in this page. You use your javaScript (JSONP). JSONP could be implemented in any one of your favorite JavaScript Framework you use e.g. JQUERY,Ext JS,Dojo, Prototype e.t.c
Then you would have to parse the XML or JSON response from the three sources (Google, Yahoo and Bing),and make an appropriate display for your users to navigate the results.

About the SMS part
SMS capability is attained using SMS Gateway. There are several open and close source SMS Gateways. the most powerful of them all is the one built in Erlang/OTP technology called: OSERL, but to test it, you need direct connection with an SMSC in anyone of your local service provider.You need a Port on their SMSC, a user name and a password.There is another one which is better for development reasons called: NowSMS because it has capabilities for USSD, Modem Internet Communication, SMSC service connectivity, HTTP 1.1 and HTTP 1.0, configuration of two-way SMS messaging e.t.c from a Web App to-and -from the SMS Gateway. Go to their site, grab the trial version, follow the documentation and then configure two-way from your web app to the gateway and vice versa. Since NowSMS is not free, you can try: Kannel, it is open source but you will need help from the community to set it up on your Unix or Linux box. More on incorporating SMS capability in Web Applications can be found:
Here

I also asked once a Question related to development of a powerful search engine using Erlang, Mnesia & YAWS webserver on Stackoverflow. I got plenty of good answers and responses.

Please CLICK ME!

Hope this may help. As I am not sure about SMS thing.