[英]Make nested promise call in javascript
我嘗試使用yammer SDK https://c64.assets-yammer.com/assets/platform_js_sdk.js
進行異步調用,如下面的代碼。
javascript SDK文檔在這里https://developer.yammer.com/docs/js-sdk
該代碼當前執行的操作是返回一個由50個用戶的個人資料組成的數組。 用戶總數不可預測。
我想要的是:當先前調用中返回的array.length
equal to 50
,即在下一頁中可能會有更多用戶,請使用index++
再次調用相同的API URL。
重復此操作,直到沒有更多用戶要獲取為止。
但是如何做到呢?
yam.connect.loginButton('#yammer-login', function (resp) { console.log(resp.authResponse); var index = 1; if (resp.authResponse) { //trigger data process yam.platform.request({ url: "users.json",
method: "GET", data: {
"page": index }, success: function (user) { console.log("The request was successful."); console.log(user.length); }, error: function (user) { console.log("There was an error with the request."); } }); }else{ console.log("error to get access_token"); } });
簡單地通過創建一個getUsers
函數和一個全局變量(在本例中,我通過一個立即調用的函數將其范圍限定在內)來控制索引,您可以僅檢查用戶長度是否為50,如果是,請再次運行該函數:
(function() {
var index = 1;
var getUsers = function() {
yam.platform.request({
url: "users.json",
method: "GET",
data: {
"page": index
},
success: function (user) {
console.log("The request was successful.");
console.log(user.length);
if (user.length === 50) {
// There are additonal users - increment index and run the function again
index++;
getUsers();
}
},
error: function (user) {
console.log("There was an error with the request.");
}
});
};
yam.connect.loginButton('#yammer-login', function (resp) {
console.log(resp.authResponse);
if (resp.authResponse) {
//trigger data process
getUsers();
} else {
console.log("error to get access_token");
}
});
})();
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