龙卷风发布请求:缺少参数 [英] tornado post request: missing argument
问题描述
我正在使用龙卷风构建一个Web服务器，现在正在创建一个登录模块.这是代码:
I'm using tornado to build a web server and now I'm creating a login module. Here is the code:
<body>
<form id="uploadForm">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input name="name" type="email" class="form-control" id="exampleInputEmail1" placeholder="Email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input name="password" type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<button id="submit" type="button" class="btn btn-default">Submit</button>
</form>
</body>
<script src="../js/plugins/jquery-3.2.1.min.js?v=c9f5aeeca3"></script>
<script src="../js/common/bootstrap.min.js?v=5869c96cc8"></script>
<script>
$(function(){
$('#submit').on('click',function(){
$.ajax({
url: 'http://www.example.com/login',
method: 'POST',
data: $('#uploadForm').serialize(),
contentType: false,
processData: false,
cache: false,
success: function(data) {
console.log(data);
if( data === 'ERROR'){
alert('login failed')
}else{
location.href = data;
}
},
error: function (jqXHR) {
alert('ERROR');
}
});
});
});
</script>
和后端部分:
And the backend part:
class LoginHandler(tornado.web.RequestHandler):
def post(self, path):
try:
print(self.request.body)
name = self.get_body_argument("name")
except Exception as e:
print(e)
进行测试时，我可以看到 print(self.request.body)给了我结果: b'name = test& password = tttt'但是之后我得到一个例外:
When I do a test, I can see that print(self.request.body) gives me the result: b'name=test&password=tttt' but after that I get an exception:
HTTP 400:错误的请求(缺少参数名称)
HTTP 400: Bad Request (Missing argument name)
name = test 只是在http正文中，但是为什么它告诉我缺少参数名称?
name=test is just in the http body but why it tells me missing argument name?
推荐答案
Tornado仅支持将"application/x-www-form-urlencoded"和"multipart/form-data"作为内容类型.因此，当我们向服务器发送发布请求时，我们必须使用正确的contentType发送请求.例如，
Tornado only supports "application/x-www-form-urlencoded" and "multipart/form-data" as content type. So when we send a post request to the server, we must send the request with the right contentType. For example,
$.ajax({
url: 'http://www.example.com/login',
method: 'POST',
data: $('#uploadForm').serialize(),
contentType: 'application/x-www-form-urlencoded',
processData: false,
...
此外，由于默认设置为'application/x-www-form-urlencoded'，因此我们可以忽略ajax中的 contentType .
Also, we can neglect the contentType in ajax as 'application/x-www-form-urlencoded' is set by default.
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