Laravel小应用集锦（1）：搭建短网址生成器

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1、routes中

Route::get('/','HomeController@index');
Route::get('{url_code}','HomeController@shortened');
Route::post('/','HomeController@store');

2、数据库Urls

Schema::create('urls',function (Blueprint $table){
            $table->increments('id');
            $table->string('url');
            $table->string('shortened',5);
            $table->timestamps();
        });

3、Url模型

 public static function get_unique_short_url(){
        $shortened = base_convert(rand(10000,99999),10,36);
        $record = \App\Url::where('shortened','=',$shortened)->first();
        if(!empty($record)){
            static::get_unique_short_url();//如果数据库中已有数据记录，则重新调用
        }
        return $shortened;
    }

4、view中

<h1>短链生成器</h1>
    <div class="col-lg-8">
        {{Form::open(['url'=>'/'])}}
        <div class="input-group">
            {{Form::text('url','',['class'=>'form-control input-lg','placeholder'=>'请输入您的网址'])}}
            <span class="input-group-btn">
                    {{Form::submit('缩短','',['class'=>'btn btn-success btn-lg'])}}
		      </span>
        </div><!-- /input-group -->
        {{Form::close()}}
        <br><br>
        <h2>您的短链:<a href="/{{$shortened}}" target="_blank">http://xxx.cn/{{$shortened}}</a></h2>
    </div>

5、Home控制器

   
 public function store(){
        $url = \request('url');

        $this->validate(\request(),[
            'url'=>'required|url'
        ]);

        $record = \App\Url::where('url',$url)->first();

    //如果数据库中已经有记录，则直接返回数据库中的记录
        if($record){
            $shortened = $record->shortened;
            return view('/home/result',compact(['shortened']));
        }


        //如果数据库中没有记录，则生成随机短链，将原本网址和随机短链存入数据库
        $shortened = \App\Url::get_unique_short_url();

        \App\Url::create(['url'=>$url,'shortened'=>$shortened]);

        return view('/home/result',compact(['shortened']));
    }


//用户在首页点击短网址时，根据传递的参数短链 4glj 在数据库中寻找，如果数据库中有记录，则直接跳转到原本的网址，否则返回首页
    public function shortened($url_code){
        $shortened = \App\Url::where('shortened',$url_code)->first();
        if(is_null($shortened)){
            return redirect('/home/index');
        }

        return redirect($shortened->url);
    }

6、项目地址

短网址生成器