与 curl 命令等效的 Javascript
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Javascript equivalent for curl command
提问by amol-jore
I am using below curl command to get the data from Druid cluster hosted on remote server, in the json format
我使用下面的 curl 命令从远程服务器上托管的 Druid 集群中获取数据，格式为 json
curl -X POST "http://www.myserverIP.com:8080/druid/v2/" -H 'content-type: application/json' -d '{"queryType": "groupBy","dataSource": "twsample","granularity": "none","dimensions": ["created_at"],"aggregations": [{"type": "count", "name": "tweetcount"}],"intervals": ["2013-08-06T11:30:00.000Z/2020-08-07T11:40:00.000Z"]}'
but I am not able create an equivalent javascript method which will do the same thing, I am using below code to do this.
但我无法创建一个等效的 javascript 方法来做同样的事情，我使用下面的代码来做到这一点。
function sendCurlRequest(){
var json_data = {
"queryType": "groupBy",
"dataSource": "twsample",
"granularity": "none",
"dimensions": ["created_at"],
"aggregations": [
{"type": "count", "name": "tweetcount"}
],
"intervals": ["2013-08-06T11:30:00.000Z/2020-08-07T11:40:00.000Z"]
};
$.ajax({
cache : false,
type: 'POST',
crossDomain:true,
url: 'http://www.myserverIP:8080/druid/v2/',
data:json_data,
//dataType: "jsonp",
contentType:"application/jsonp",
success: function(data){
alert(data);
var pubResults = data;
},
error: function(data){
alert("ERROR RESPONSE FROM DRUID SERVER : "+JSON.stringify(data));
},
complete: function(data){
console.log("call completed");
}
});
}
Any help will be appreciated.
任何帮助将不胜感激。
回答by PJR
cURL is able to send and receive data cross domain to remote servers but that is not the case with javascript for security reasons
cURL 能够跨域向远程服务器发送和接收数据，但出于安全原因，javascript 并非如此
Your options I believe are
我相信你的选择是
1) Use CORSto set headers on the remote server to accept cross domain calls (if you have access to the Server) as also pointed by thriqon
1) 用于CORS在远程服务器上设置标头以接受跨域调用（如果您有权访问服务器），这也由 thriqon 指出
2) Use jsonPformat response from the server(again if you have control over how the response is generated or if its already in jsonP format)
2）使用jsonP来自服务器的格式响应（同样，如果您可以控制响应的生成方式或者它是否已经是 jsonP 格式）
3) Write a server-side proxythat acts as the intermediary between your calls and the remote server. You can then format the header or response on the proxy to enable it to respond to cross domain calls
3）编写一个server-side proxy充当您的调用和远程服务器之间的中介。然后，您可以格式化代理上的标头或响应，以使其能够响应跨域调用
