我试图将客户端数据(经纬度的html5api)发送到服务器端。我不熟悉JS,但我找到了纬度和longtitude两个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django表单,它将接收数据:
^{pr2}$我还创建了一个视图,它使用以下形式:
def index(request):
if request.method == 'POST':
cords_form = CordsForm(request.POST)
if cords_form.is_valid():
latitude = cords_form.cleaned_data['latitude']
longitude = cords_form.cleaned_data['longitude']
print(longitude) # only for testing
print(latitude) # only for testing
else:
cords_form = CordsForm()
return render(request, 'weather/index.html', {'form': cords_form})
这是索引页:
{% extends 'weather/base.html' %}
{% block content %}
<form method="POST" id="geoform" name="geoform">
{% csrf_token %}
{{ form.latitude }}
<script>latitude();</script>
{{ form.longitude }}
<script>longitude();</script>
</form>
<script>
document.addEventListener("DOMContentLoaded", function (event) {
document.getElementById("geoform").submit();
});
</script>
{% endblock content %}
每次用户访问索引页时,纬度和经度都会通过表单自动发送,但以下代码:
<script>
document.addEventListener("DOMContentLoaded", function (event) {
document.getElementById("geoform").submit();
});
</script>
发送数据,但它正在刷新页面,就像我在垃圾邮件F5按钮。当索引页被访问时,如何才能只发送一次数据?在
您应该本地存储:
当你想把数据发送到服务器时,检查一下,如果你没有这个功能,就可以把它发送出去
您应该在检查本地存储的if语句中使用此代码,然后运行以下命令:
像这样:
^{pr2}$https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage
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