qt qml ajax 获取 json 天气数据示例

/** ajax 辅助函数 */ // GET function get(url, success, failure) { var xhr = new XMLHttpRequest; xhr.open("GET", url); xhr.onreadystatechange = function() { handleResponse(xhr, success, failure); } xhr.send(); } // POST function post(url, arg, success, failure) { var xhr = new XMLHttpRequest; xhr.open("POST", url); xhr.setRequestHeader("Content-Length", arg.length); xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;"); //用POST的时候一定要有这句 xhr.onreadystatechange = function() { handleResponse(xhr, success, failure); } xhr.send(arg); } // 处理返回值 function handleResponse(xhr, success, failure){ if (xhr.readyState == XMLHttpRequest.DONE) { if (xhr.status == 200){ if (success != null && success != undefined) { var result = xhr.responseText; try{ success(result, JSON.parse(result)); }catch(e){ success(result, {}); } } } else{ if (failure != null && failure != undefined) failure(xhr.responseText, xhr.status); } } } // pastebin post demo function demo(){ var url = "http://pastebin.com/api/api_post.php"; var name = 'project1'; var code = 'hello world'; var params = "api_option=paste" + "&" + "api_dev_key=7ffdaa2800e8c5da75589596f405d739" + "&" + "api_paste_format=javascript" + "&" + "api_paste_expire_date=1M" + "&" + "api_paste_private=1" + "&" + "api_paste_name=" + name + "&" + "api_paste_code=" + code; post(url, params, function(result, json){ console.log(result); }); }