我正在尝试将客户端数据(纬度和经度的html5 api)发送到服务器端。我不熟悉JS,但是找到了两个用于纬度和经度的JS函数的代码:
function latitude() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
return document.getElementById('latitude').setAttribute("value", position.coords.latitude);
}
);
}
else {
alert("Sorry, your browser does not support HTML5 geolocation.");
}
}
function longitude() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
return document.getElementById('longitude').setAttribute("value", position.coords.longitude);
}
);
}
else {
alert("Sorry, your browser does not support HTML5 geolocation.");
}
}
然后我创建了将接收数据的django表单:
class CordsForm(forms.Form):
latitude = forms.CharField(widget=forms.TextInput(
attrs={'id': 'latitude', 'type': 'hidden'}))
longitude = forms.CharField(widget=forms.TextInput(
attrs={'id': 'longitude', 'type': 'hidden'}))
我还创建了使用以下形式的视图:
def index(request):
if request.method == 'POST':
cords_form = CordsForm(request.POST)
if cords_form.is_valid():
latitude = cords_form.cleaned_data['latitude']
longitude = cords_form.cleaned_data['longitude']
print(longitude) # only for testing
print(latitude) # only for testing
else:
cords_form = CordsForm()
return render(request, 'weather/index.html', {'form': cords_form})
这是索引页:
{% extends 'weather/base.html' %}
{% block content %}
<form method="POST" id="geoform" name="geoform">
{% csrf_token %}
{{ form.latitude }}
<script>latitude();</script>
{{ form.longitude }}
<script>longitude();</script>
</form>
<script>
document.addEventListener("DOMContentLoaded", function (event) {
document.getElementById("geoform").submit();
});
</script>
{% endblock content %}
每次用户访问索引页时,纬度和经度都是通过表格自动发送的,但是此代码如下:
<script>
document.addEventListener("DOMContentLoaded", function (event) {
document.getElementById("geoform").submit();
});
</script>
发送数据,但刷新页面,就像我向F5按钮发送垃圾邮件一样。索引页被访问后,我如何仅发送一次数据?
答案 0 :(得分:0)
您应该本地存储:
,当您要将数据发送到服务器时,请检查并确认是否具有该功能可以发送
您应在if语句中使用此代码,以检查您的本地存储,然后运行此代码:
document.addEventListener("DOMContentLoaded", function (event) {
document.getElementById("geoform").submit();
像这样:
var check = localStorage.getItem('posted');
if(check !== 'true'){
document.addEventListener("DOMContentLoaded", function (event) {
document.getElementById("geoform").submit();
localStorage.setItem('posted','true')
}
https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage