我想从用户端为我的项目上传个人资料图片。
我的 HTML 代码是
<div class=" col-xs-12">
<div class="thumbnail">
<!--<img id="profilepic" class="profilepicholder" height="200" width="200">-->
<img id="profilepic" class="profilepicholder" src="#" alt="your image" height="200" width="200" />
<input type='file' />
<button id="save" class="save btn btn-primary btn-block">Save</button>
</div>
</div>
上传文件的Javascript是
$(function () {
$(":file").change(function () {
if (this.files && this.files[0]) {
var reader = new FileReader();
reader.onload = imageIsLoaded;
reader.readAsDataURL(this.files[0]);
}
});
});
function imageIsLoaded(e) {
$('#profilepic').attr('src', e.target.result);
};
$(document).ready(function () {
profile_url = "";
upload_counter = 0;
uploaded_counter = 0;
/*
Function to carry out the actual PUT request to S3 using the signed request from the app.
*/
function upload_file(file, signed_request, url, type) {
var xhr = new XMLHttpRequest();
xhr.open("PUT", signed_request);
xhr.setRequestHeader('x-amz-acl', 'public-read');
xhr.onload = function () {
if (xhr.status === 200) {
console.log(url)
//this is the URL , keep the value in the variable
$(document).ready(function () {
/* $("#social_card").attr("value", url);
console.log("oi" + url);
*/ //national_id_url = url;
upload_counter = upload_counter + 1;
console.log(upload_counter);
if (type == "profilepic") {
profile_url = url;
}
});
}
};
xhr.onerror = function () {
alert("Could not upload file.");
};
xhr.send(file);
}
/*
Function to get the temporary signed request from the app.
If request successful, continue to upload the file using this signed
request.
*/
function get_signed_request(file, type) {
var xhr = new XMLHttpRequest();
xhr.open("GET", "/sign_s3?file_name=" + $(".username").val() + "/" + file.name + "&file_type=" + file.type);
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
var response = JSON.parse(xhr.responseText);
upload_file(file, response.signed_request, response.url, type);
} else {
alert("Could not get signed URL.");
}
}
};
xhr.send();
}
/*
Function called when file input updated. If there is a file selected, then
start upload procedure by asking for a signed request from the app.
*/
function init_upload() {
console.log("here");
var profilepic_files = document.getElementById("profilepic").innerHTML;
var profilepic_file = profilepic_files[0];
if (profilepic_file == null) {
//alert("No file selected.");
} else {
get_signed_request(profilepic_file, "profilepic");
}
}
var myInterval;
$("#save").mouseup(function () {
$('.loadingcustom').css({
display: 'block',
position: 'absolute',
width: '200vw',
});
init_upload();
var profilepic_files = document.getElementById("profilepic").innerHTML;
var profilepic_file = profilepic_files[0];
if (profilepic_file != null) {
uploaded_counter = uploaded_counter + 1;
}
myInterval = setInterval(function () {
console.log(upload_counter);
console.log(uploaded_counter);
if (upload_counter == uploaded_counter) {
upload_counter = uploaded_counter + 1;
var userData = {
"profile_url": profile_url,
};
console.log(userData);
$.ajax({
type: "POST",
url: "/users/",
contentType: "application/json; charset=utf-8",
dataType: "json",
data: JSON.stringify(userData),
success: function (data) {
console.log("user created");
$('.alert').show();
$('.loadingcustom').hide();
$('.savebtn').show();
clearInterval(myInterval);
setTimeout(function () {
window.location.reload();
}, 2000);
}
});
}
}, 3000);
});
});
我正在将此文件上传到 MongoDB。 我的要求是为特定用户上传图片。
最佳答案
是的!我可以那样做。想与您分享我的代码 :) 此代码用于上传文件和更新上传的文件。
<script>
$(document).ready(function () {
var get_params = function (search_string) {
var parse = function (params, pairs) {
var pair = pairs[0];
var parts = pair.split('=');
var key = decodeURIComponent(parts[0]);
var value = decodeURIComponent(parts.slice(1).join('='));
// Handle multiple parameters of the same name
if (typeof params[key] === "undefined") {
params[key] = value;
} else {
params[key] = [].concat(params[key], value);
}
return pairs.length == 1 ? params : parse(params, pairs.slice(1))
}
// Get rid of leading ?
return search_string.length == 0 ? {} : parse({}, search_string.substr(1).split('&'));
}
var params = get_params(location.search);
var usersId = params['id'];
var uid = usersId.replace(/\s+/g, "");
var username;
var profilepicture;
var passcard;
$.ajax({
type: "GET",
url: "/users/" + uid,
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
console.log(data.passport_url);
username = data.username;
$('#nidimage').attr('src', data.nid_url);
$('#passcard').attr('src', data.passport_url);
$('#birthimage').attr('src', data.birth_url);
$('#vehiclelicenceimage').attr('src', data.vehicle_url);
$('#drivinglicimage').attr('src', data.driving_url);
}
});
national_id_url = "";
passport_url = "";
birth_certificate_url = "";
driving_license_url = "";
vehicle_license_url = "";
profile_pic_url = "";
upload_counter = 0;
uploaded_counter = 0;
/*
Function to carry out the actual PUT request to S3 using the signed request from the app.
*/
function upload_file(file, signed_request, url, type) {
var xhr = new XMLHttpRequest();
xhr.open("PUT", signed_request);
xhr.setRequestHeader('x-amz-acl', 'public-read');
xhr.onload = function () {
if (xhr.status === 200) {
// console.log(url)
//this is the URL , keep the value in the variable
var userData;
if (type == "nid") {
national_id_url = url;
userData = {
nid_url: national_id_url
};
} else if (type == "passport") {
passport_url = url;
userData = {
passport_url: passport_url
};
} else if (type == "birth") {
birth_certificate_url = url;
userData = {
birth_url: birth_certificate_url
};
} else if (type == "vehicle") {
vehicle_license_url = url;
userData = {
vehicle_url: vehicle_license_url
};
} else if (type == "driving") {
driving_license_url = url;
userData = {
driving_url: driving_license_url
};
} else if (type == "propic") {
profile_pic_url = url;
userData = {
profile_url: profile_pic_url
};
}
// console.log("pp"+ passport_url);
// console.log("boo "+uid);
$.ajax({
type: "PUT",
url: "/users/" + uid,
contentType: "application/json; charset=utf-8",
dataType: "json",
data: JSON.stringify(userData),
success: function (data) {
console.log("user Updated");
$('.loadingcustom').css({
display: 'none',
});
//swal("Your file has been updated successfully!", "success")
swal("Good job!", "Your file has been updated successfully!", "success")
}
});
}
};
xhr.onerror = function () {
alert("Could not upload file.");
};
xhr.send(file);
}
// /*
// Function to get the temporary signed request from the app.
// If request successful, continue to upload the file using this signed
// request.
// */
function get_signed_request(file, type) {
var xhr = new XMLHttpRequest();
xhr.open("GET", "/sign_s3?file_name=" + username + "/" + file.name + "&file_type=" + file.type);
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
var response = JSON.parse(xhr.responseText);
upload_file(file, response.signed_request, response.url, type);
} else {
alert("Could not get signed URL.");
}
}
};
xhr.send();
}
//
// /*
// Function called when file input updated. If there is a file selected, then
// start upload procedure by asking for a signed request from the app.
// */
function init_upload(filetype) {
console.log("here");
if (filetype == "nid-upload") {
var nid_files = document.getElementById("national-card").files;
var nid_file = nid_files[0];
if (nid_file == null) {
alert("No file selected.");
}
get_signed_request(nid_file, "nid");
}
if (filetype == "pass-upload") {
var pass_files = document.getElementById("passport-card").files;
var pass_file = pass_files[0];
if (pass_file == null) {
alert("No file selected.");
}
get_signed_request(pass_file, "passport");
}
if (filetype == "birth-upload") {
var birth_files = document.getElementById("birth-cirtificate").files;
var birth_file = birth_files[0];
if (birth_file == null) {
alert("No file selected.");
}
get_signed_request(birth_file, "birth");
}
if (filetype == "driving-upload") {
var driving_files = document.getElementById("driving-license").files;
var driving_file = driving_files[0];
if (driving_file == null) {
alert("No file selected.");
}
get_signed_request(driving_file, "driving");
}
if (filetype == "vehicle-upload") {
var vehicle_files = document.getElementById("vehicle-license").files;
var vehicle_file = vehicle_files[0];
if (vehicle_file == null) {
alert("No file selected.");
}
get_signed_request(vehicle_file, "vehicle");
}
if (filetype == "propic-upload") {
var profile_files = document.getElementById("profile-pic").files;
var profile_file = profile_files[0];
if (profile_file == null) {
alert("No file selected.");
}
get_signed_request(profile_file, "propic");
}
}
$(".save").mouseup(function () {
$('.loadingcustom').css({
display: 'block',
//zindex: 1,
position: 'fixed',
width: '200vw',
// top: '450px'
});
console.log("clicked");
var toupload = ($(this).attr("id"));
toupload.replace(/\s+/g, "");
init_upload(toupload);
});
/* $(function () {
$(":file").change(function () {
if (this.files && this.files[0]) {
var reader = new FileReader();
reader.onload = imageIsLoaded;
reader.readAsDataURL(this.files[0]);
}
});
});
*/
function imageIsLoaded(e) {
};
});
</script>
关于javascript - 使用 Javascript 上传个人资料图片，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33751158/
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