Question

I am using Springer OpenAccess API with JS, they provide their data with many ways, one of them is jsonp format. My code is shown below. What ever i do, i couldn’t make it run synchronuously. Callback mechanism is good solution but i want to learn how to run this function syncronously or how enable this function to behave syncronous.

Any help will be appreciated.

 SpringerAPI.prototype.getArticleInfo = function(doi){
    //create  url of article according to given doi...
    var url = this.endpoint.host+this.endpoint.method+''+'?q=doi:'+doi+'&api_key='+this.endpoint.apikey+"&callback=?";
    //get information about article...      
    //perform async request to the Springer API
    this.situation = true;
    var article;
    jQuery.ajax({
      method:'POST',
      url: url,
      dataType: 'JSON',
      cache: true,
     async: false, // to set local variable
     success: function(data)
     {
        article = FromSpringerToArticle(data,-1);
     }
    });


    return article;
};

Answer 1

You can’t do synchronous JSONP because jQuery doc says

async

…
Cross-domain requests and dataType: "jsonp" requests do not support synchronous operation…

You’ll have to do an asyc operation and use callbacks.