我正在处理rails应用程序,从UI我需要在表中选择大约500个参数(逗号分隔(以执行。我正在 AJAX 调用中发送这些选定的数据。我无法发布巨大的字符串值,因此如果所选参数计数超过 200 长度,我计划获取所选参数的长度。我需要拆分两到三批并发送执行。如何实现?
if (Device1) {
parameter_name = $('#parameters_object').val();
var getParams=parameter_name.split(',');
paramLen=getParams.length;
alert(paramLen);
if (paramLen > 200){
}
//m is a selected mac address length count
for (var i = 0; i < m; i++) {
(function () {
var macAdd = values[i];
$.ajax({
method: "POST",
url: "get_object",
dataType: "json",
data: {
parameter: getParams,
mac: macAdd,
protocol: protocol,
serialnumber: serialnumber,
},
success: function (result) {
console.log(result);
}
},
statusCode: {
404: function () {
console.log("Call failed");
}
}
});
})();
}
您可以将数组拆分为 200 个项目的块,然后遍历块数组并执行 AJAX 调用。
const chunkSize = 200
const chunkParams = getParams.reduce((resultArray, item, index) => {
const chunkIndex = Math.floor(index/chunkSize)
if(!resultArray[chunkIndex]) {
resultArray[chunkIndex] = [] // start a new chunk
}
resultArray[chunkIndex].push(item)
return resultArray
}, [])
values.forEach(macAddress =>
chunkParams.forEach(chunkParam =>
$.ajax({
method: "POST",
url: "get_object",
dataType: "json",
data: {
parameter: chunkParam,
mac: macAddress,
....
},
...
});
)
)
您可以直接在reduce循环中执行AJAX调用,性能更高,但可读性较差。
您需要将参数拆分为批处理,并为每个批处理进行 ajax 调用。请尝试以下操作:
if (Device1) {
parameter_name = $('#parameters_object').val();
var getParams=parameter_name.split(',');
paramLen=getParams.length;
alert(paramLen)
var paramsBatches = [];
var batchSize = 200;
for (i = 0, j = getParams.length; i < j; i += batchSize) {
paramsBatches.push(getParams.slice(i, i + batchSize));
}
//m is a selected mac address length count
for (var i = 0; i < m; i++) {
paramsBatches.forEach((batch, index) => {
var macAdd = values[i];
$.ajax({
method: "POST",
url: "get_object",
dataType: "json",
data: {
parameter: batch,
mac: macAdd,
protocol: protocol,
serialnumber: serialnumber,
},
success: function (result) {
console.log(result);
}
},
statusCode: {
404: function () {
console.log("Call failed");
}
}
});
}
}
}