我一开始有一个GET请求来检索数据结构。然后我执行一些更改并执行PUT将数据结构发送到服务器并更新记录的请求。当我单击第一个表单上的提交按钮时，它按预期工作，当我提交第二个表单时，它按预期执行，但它记录了 2 个错误。此外，当我连续进行 2 次编辑时，它会使应用程序崩溃并出现RangeError: Maximum call stack size exceeded错误。与错误相关的代码RangeError: Maximum call stack size exceeded在底部。
这是我的客户端脚本：
<script>
const capitalize = ([first, ...rest]) =>
${first.toUpperCase()}${rest.join('')};
let patientDataRetrieved = false;
let _xhr,_xhr2 = null;
let patientID ;
let first_name;
let last_name;
let email;
let sex;
let date_of_birth;
let patient_phone;
let marital_status;
let emergency_contact1_rel ;
let emergency_contact1_phone;
let emergency_contact2_rel ;
let emergency_contact2_phone;
let spouse_phone;
$("body").on("contextmenu",function(e){
return false;
});
$('body').bind('cut copy ', function (e) {
e.preventDefault();
});
document
.getElementById("search")
.addEventListener("submit",ev => {
ev.preventDefault();
patientID = ev.target.patientID.value;
let uid = patientID;
getPatientDetails()
function getPatientDetails(){
if(_xhr2!= null)
_xhr2.abort();
if(patientDataRetrieved===false){
$(document).ready(()=>{
_xhr = $.ajax({
url: '/profile/'+uid,
type: 'GET',
cache: false,
success: function(data){
//Instantiate Variables of User Data
let userdata = data;
console.log(userdata);
first_name = userdata.first_name;
last_name = userdata.last_name;
sex = userdata.sex;
email = userdata.email;
let blood_type = userdata.blood_type;
date_of_birth = userdata.date_of_birth;
spouse_phone = userdata.spouse_phone;
patient_phone = userdata.patient_phone;
marital_status =userdata.marital_status;
spouse_phone = userdata.spouse_phone;
emergency_contact1_rel = userdata.emergency.contact1.relationship;
emergency_contact1_phone = userdata.emergency.contact1.phone;
emergency_contact2_rel = userdata.emergency.contact2.relationship;
emergency_contact2_phone = userdata.emergency.contact2.phone;
let chronic_illnesses = userdata.chronic_illnesses;
let past_surgeries = userdata.past_surgeries;
let allergies = userdata.allergies;
let long_term_medication = userdata.long_term_medication;
//Append User Data to respective td in table
$(".firstname").append(capitalize(first_name));
$(".lastname").append(capitalize(last_name));
$("#blood_type").val(blood_type);
$(".sex").append(capitalize(sex));
$(".date_of_birth").append(date_of_birth);
$(".patient_phone").append(patient_phone);
$(".marital_status").append(capitalize(marital_status));
$(".spouse_phone").append(spouse_phone);
$(".emergency_contact1_rel").append(capitalize(emergency_contact1_rel));
$(".emergency_contact1_rel").append(", Phone: "+emergency_contact1_phone);
$(".emergency_contact2_rel").append(capitalize(emergency_contact2_rel));
$(".emergency_contact2_rel").append(", Phone: "+emergency_contact2_phone);
$("#chronic_illnesses").val(chronic_illnesses);
$("#past_surgeries").val(past_surgeries);
$("#allergies").val(allergies);
$("#long_term_medication").val(long_term_medication);
document.getElementById("patientData").style.display ="block";
patientDataRetrieved = true;
return true;
}
, error: function(jqXHR, textStatus, err){
alert('text status '+textStatus+', err
'+err)
}
});
});
}
}
});
document.getElementById("editForm").addEventListener("submit", ev =>{
ev.preventDefault();
updatePatientInfo()
function updatePatientInfo() {
if(_xhr!=null){_xhr.abort()}
let formData = {
first_name: first_name,
last_name: last_name,
email: email,
blood_type: $("#blood_type").val(),
sex: sex,
date_of_birth:date_of_birth,
patient_phone:patient_phone,
marital_status:marital_status,
spouse_phone: spouse_phone,
emergency_contact1_relationship:emergency_contact1_rel,
emergency_contact1_phone:emergency_contact1_phone,
emergency_contact2_relationship:emergency_contact2_rel,
emergency_contact2_phone: emergency_contact2_phone,
chronic_illnesses: $("#chronic_illnesses").val(),
past_surgeries: $("#past_surgeries").val(),
allergies: $("#allergies").val(),
long_term_medication: $("#long_term_medication").val(),
uid: patientID,
};
_xhr2 = $.ajax({
url: "/edit_record_process",
type: "PUT",
data: formData,
datatype:"text",
encoded:true,
cache: false,
success:function(data){
if(data){
window.location.reload()
}
},
error: (err)=>{
alert(err);
}
});
}
});
这是服务器端代码：
app.get("/profile/:uid", function (req, res){
//const current_user =
//const current_user =
const uid = req.params.uid;
db.ref("user_file_ref").on("value", snapshot=>{
snapshot.forEach( dataSnapshot=>{
if(uid === dataSnapshot.val().user_id){
//line referenced in range error
getFileFromNet(dataSnapshot.val().ipfs_ref).then( result =>
{
const hash = JSON.parse(result);
let decrypted_string = decrypt(hash);
let return_data = JSON.parse(decrypted_string);
return res.send(return_data);
}).catch((err) =>{
return console.log(err);
});
}else{
}
})
})
return true;
});
app.put("/edit_record_process", (req,res)=>{
let first_name = req.body.first_name;
let last_name= req.body.last_name;
let blood_type = req.body.blood_type ;
let sex = req.body.sex ;
let date_of_birth= req.body.date_of_birth ;
let email = req.body.email ;
let patient_phone= req.body.patient_phone ;
let userID = req.body.uid;
let marital_status= req.body.marital_status ;
let emergency= {
contact1:
{
"relationship":req.body.emergency_contact1_relationship,
"phone": req.body.emergency_contact1_phone
},
contact2:
{
"relationship":req.body.emergency_contact2_relationship,
"phone": req.body.emergency_contact2_phone
}
};
let chronic_illnesses = req.body.chronic_illnesses ;
let past_surgeries = req.body.past_surgeries ;
let allergies = req.body.allergies ;
let long_term_medication = req.body.long_term_medication ;
const userdata = {
"first_name" : first_name,
"last_name" : last_name,
"sex": sex,
"blood_type": blood_type,
"date_of_birth":date_of_birth,
"email":email,
"patient_phone": patient_phone,
"marital_status": marital_status,
"emergency": emergency,
"chronic_illnesses": chronic_illnesses,
"past_surgeries":past_surgeries,
"allergies": allergies,
"long_term_medication": long_term_medication,
}
let userdata_string = JSON.stringify(userdata);
let encrypted_user_data = JSON.stringify(encrypt(userdata_string));
sendFileToNet(encrypted_user_data).then((ipfs_object)=>{
let ipfs_path = ipfs_object.path;
db.ref("user_file_ref").on("value", snapshot=>{
snapshot.forEach(dataSnapshot => {
if(userID === dataSnapshot.val().user_id){
dataSnapshot.ref.update({ipfs_ref:ipfs_path}).then(()=>
{
return res.sendStatus(201);
}).catch((err)=>{
console.log(err)
})
}
})
})
});
});
IPFS API 代码：
const sendFileToNet = async (file_data) => {
const cid = function (data) {
return client.add(data).then(cid =>{return cid;}).catch(err=>{
console.log(err)})
}
const real_cid = await cid(file_data);
return real_cid;
}
const getFileFromNet = async (cid) =>{
const stream = client.cat(cid)
let data = ''
for await (const chunk of stream) {
// chunks of data are returned as a Buffer, convert it back to a
string
data += chunk.toString()
}
return data;
}