"PHP versions below 7.0 are not supported"我尝试将JSON发送给客户端，但是客户端警报XMLHttpRequest为Server site:
app.post('/myaction', async function(req, res) {
async function next_func(req, res){
var st = req.body.status;
var myJson = await show();
return myJson;
}
dataJ = await next_func(req, res);
try {
dataJson = JSON.parse(JSON.stringify(dataJ));
} catch (e) {
console.log("parse error");
}
if( isJSON(JSON.stringify(dataJ))) console.log("be Json ");
else console.log("not Json ");
console.log("send JSON : "+JSON.stringify(dataJ));
console.log("type JSON : "+typeof JSON.stringify(dataJ));
console.log("dataJson : "+dataJson);
console.log("type dataJson : "+typeof dataJson);
res.status(200);
res.setHeader('Content-Type', 'application/json');
res.send(dataJson);
});
async function show(){
var con = mysql.createConnection({
host: "127.0.0.1",
user: "root",
password: "aaaaaaaa",
database: "doto"
});
var sql ="select * from task_list";
resultsArray = [];
await new Promise((resolve, reject) => {
con.connect((err, connection) => {
if (err) return reject(err)
con.query(sql, (err, rows, fields) => {
if (err) return reject(err)
resolve(
rows.forEach( (row) => {
resultsArray.push(
{detail:row.details, status:row.status, subject:row.subject}
);
})
)
})
})
})
return resultsArray;
}
function isJSON(str) {
try {
return (JSON.parse(str) && !!str);
} catch (e) {
return false;
}
}
Cleint site
$.fn.ajaxShow = function(st) {
xhrct = $.ajax({
type: 'POST',
dataType: "json",
data : {
status : st
},
url: 'http://127.0.0.1:8081/myaction',
success: function (data) {
alert("function");
$('#tb').empty();
if(data!=null) {
var fotoData = $.parseJSON(data);
$(fotoData).each(function (i, obx) {
alert("fotoData");
$('#tb').append('<tr>')
.append('<td>'+obx.detail+'</td>'
.append('<td>'+obx.status+'</td>')
.append('<td>'+obx.subject+'</td>')
.append('</tr>');
});
}
},
error: function(XMLHttpRequest, textStatus, errorThrown)
{
alert("XMLHttpRequest:"+XMLHttpRequest.responseText);
alert("textStatus: "+textStatus);
alert("errorThrown: "+errorThrown);
}
});
}
，textStatus：error和errorThrown为null。在控制台上，它显示'be Json'和dataJson的类型是一个对象并发送JSON：
null请帮助我
答案 0 :(得分：2)
尝试添加内容类型并对要发送的对象进行字符串化：
data: JSON.stringify({status : st}),
contentType: "application/json"