如何使用头参数发送HTTP请求?

I'm very new to javascript and web programming in general and I need some help with this. I have an HTTP request that I need to send through javascript and get need to store the output in a variable. I tried using just the call url:

我对javascript和web编程很陌生，我需要一些帮助。我有一个HTTP请求，需要通过javascript发送，并需要将输出存储在一个变量中。我试着只用调用url:

https://api.fantasydata.net/nfl/v2/JSON/PlayerSeasonStats/2015

But it returns an authentication error because I didn't send my API key and it doesn't show me how to do it just in the URL. The API key is listed as a header and not a paramater and I'm not sure what to do with that. I tried using the XMLHttpRequest() class but I'm not quite sure I understand exactly what it does nor could I get it to work.

但它会返回一个认证错误，因为我没有发送API密钥，它也没有告诉我如何在URL中执行。API键被列成一个头，而不是一个参数，我不知道该怎么做。我尝试使用XMLHttpRequest()类，但我不太确定我是否确切地理解了它的功能，也不确定它是否能够正常工作。

The actual HTTP Request

实际的HTTP请求

GET https://api.fantasydata.net/nfl/v2/JSON/PlayerSeasonStats/2015 HTTP/1.1
Host: api.fantasydata.net
Ocp-Apim-Subscription-Key: ••••••••••••••••••••••••••••••••

I just need to figure out how to send that request along with the key and how to store the JSON doc it returns as a variable in javascript.

我只需要弄清楚如何将请求连同密钥一起发送，以及如何将它返回的JSON文档存储为javascript中的变量。

EDIT: This is what I have so far:

编辑:这就是我目前所拥有的:

function testingAPI(){
var key = "8a1c6a354c884c658ff29a8636fd7c18";
httpGet("https://api.fantasydata.net/nfl/v2/JSON/PlayerSeasonStats/2015",key    );
alert(xmlHttp.responseText);
var x = 0;
}

function httpGet(theUrl,key)
{
var xmlHttp = new XMLHttpRequest();

xmlHttp.open( "GET", theUrl, false ); // false for synchronous request
xmlHttp.setRequestHeader("Ocp-Apim-Subscription-Key",key);
xmlHttp.send( null );
return xmlHttp.responseText;
}

Thank you!

谢谢你！

2 个解决方案

#1

If it says the API key is listed as a header, more than likely you need to set it in the headers option of your http request. Normally something like this :

如果它说API键被列为头文件，那么您很可能需要在http请求的头选项中设置它。通常是这样的:

headers: {'Authorization': '[your API key]'}

Here is an example from another Question

这是另一个问题的例子

$http({method: 'GET', url: '[the-target-url]', headers: {
  'Authorization': '[your-api-key]'}
});

Edit : Just saw you wanted to store the response in a variable. In this case I would probably just use AJAX. Something like this :

编辑:刚才看到您想将响应存储在一个变量中。在这种情况下，我可能只使用AJAX。是这样的:

$.ajax({ 
   type : "GET", 
   url : "[the-target-url]", 
   beforeSend: function(xhr){xhr.setRequestHeader('Authorization', '[your-api-key]');},
   success : function(result) { 
       //set your variable to the result 
   }, 
   error : function(result) { 
     //handle the error 
   } 
 }); 

I got this from this question and I'm at work so I can't test it at the moment but looks solid

我从这个问题中得到这个，我正在工作，所以我现在不能测试它，但看起来很可靠

Edit 2: Pretty sure you should be able to use this line :

编辑2:非常确定你应该能够使用这一行:

headers: {'Authorization': '[your API key]'},

instead of the beforeSend line in the first edit. This may be simpler for you

而不是第一次编辑的前一行。这对你来说可能更简单

#2

With your own Code and a Slight Change withou jQuery,

使用您自己的代码，稍微改变一下jQuery，

function testingAPI(){ 
    var key = "8a1c6a354c884c658ff29a8636fd7c18"; 
    var url = "https://api.fantasydata.net/nfl/v2/JSON/PlayerSeasonStats/2015";
    console.log(httpGet(url,key)); 
}


function httpGet(url,key){
    var xmlHttp = new XMLHttpRequest();
    xmlHttp.open( "GET", url, false );
    xmlHttp.setRequestHeader("Ocp-Apim-Subscription-Key",key);
    xmlHttp.send(null);
    return xmlHttp.responseText;
}

Thank You

谢谢你！