[英]Issues with handling http errors with jQuery AJAX webservice calls
我正在开发一个jQuery应用程序,在该应用程序中,我需要在HTTP错误发生时捕获它。 以下是我的摘录。
// Function to validate URL
function validateURL(url)
{
var pattern = new RegExp();
pattern.compile("^[A-Za-z]+://[A-Za-z0-9-_]+\\.[A-Za-z0-9-_%&\?\/.=]+$");
if (!pattern.test(url))
{
return false;
}
return true;
}
// Generic error handler for handling the webservice requests.
function initWebService(wstype, wsurl,jsonData)
{
// If the method parameter is not either "GET" or "POST" display an error message to the developer.
var msgValidateArgument;
var wsCallStatus;
var callbackData;
if ((arguments[0] != 'GET') && (arguments[0] != 'POST'))
{
//alert("Invalid");
//alert("You must provide a valid http method in your webservice call.");
msgValidateArgument = "You must provide a valid http method in your webservice call.";
return msgValidateArgument;
}
// Making sure whether the developer is passing the required number of parameters.
if(arguments.length < 3)
{
//alert("Some required arguments seems to be missing. Please check your webservice invocation.");
msgValidateArgument = "Some required arguments seems to be missing. Please check your webservice invocation.";
return msgValidateArgument;
}
if (!validateURL(arguments[1]))
{
msgValidateArgument = "You must provide a valid URL in your webservice call.";
return msgValidateArgument;
}
if(arguments[2] != ''){
var response=jQuery.parseJSON(arguments[2]);
if(typeof response =='object'){
//It is JSON
alert(response.toSource());
}
else{
msgValidateArgument = "The JSON data being passed is not in valid JSON format.";
return msgValidateArgument;
}
}
// Making the AJAX call with the parameters being passed. The error handler handles some of the possble http error codes as of now.
$.ajax({
type: arguments[0],
url: arguments[1],
data: arguments[2],
dataType: 'json',
async:false,
statusCode:{
404: function(){
alert('Page not found');
},
500: function(){
alert('Page not found');
},
504: function(){
alert('Unknown host');
}
},
success: function(data){
//alert('Data being returned from server: ' +data.toSource());
//alert('Data being returned from server: ' +data.toSource());
//alert(data);
callbackData = data;
}
});
return callbackData;
}
但是,当我以编程方式更改web服务url以保留错误的值时,并且在调用html页面时,我能够在firebug控制台中看到错误消息,但是我的代码段似乎根本没有捕获到该错误。
例如,在调用GEONames API时,我在Firebug的控制台中遇到“ 407需要授权”的提示。但是,即使我在错误块中处理了该状态代码,也没有触发。这是什么原因?
我们没有有效解决这些HTTP错误的全面解决方案吗?
我认为您的代码存在一些问题……首先,如何调用handleError
? 因为您调用了一个名为handleError
的方法,但未传递任何信息……我假设您使用的是.ajax()
您应该这样做:
$.ajax({
statusCode: {
404: function() {
alert('page not found');
},
500: function() {
alert('server error');
}
},
success : {
alert('it working');
},
complete : {
alert('im complete');
});
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