I declared a variable inside a function and modify it again inside another function that is within the variable function. Why the value of variable upload is reset or reinitialize when returning it?
var upload = [];
$upload.upload({
url: '/ibsapp/app/app/api/libs/upload.php',
file: file[0],
data: fileLocation,
}).success(function (data, status, headers, config) {
// add publication data
AppService.insertService('publication', publication).then(function(response){
// If unsuccessful in inserting data in the database, delete the files that are uploaded.
if(response['status'] === "error"){
$upload.upload({
url: '/ibsapp/app/app/api/dbHelper/delete.php',
data: fileLocation + '/' + file[0].name,
});
/* upload value is now the response */
upload = response;
});
}
});
/* When I log here, the value of upload is reset to [] */
console.log(upload);
return upload;
Related
A follow-up on a similar question I posted yesterday. I am trying to delete data from a table in Azure App service. This is my function in my Angular file.
function delName(user) {
//$scope.categories.push(user);
alert("about to delete. Action cannot be undone. Continue?")
$http.delete('https://test-evangelists-1.azurewebsites.net/tables/people', user, config)
.then(function (res) {
$scope.getNames();
});
}
Then I added an HTML button:
<button id="btn-del-evangelist" class="btn btn-default btn" ng-click="delName(user);">Delete User</button>
This is the value of my headers variable:
var config = {
headers: {
'Access-Control-Allow-Origin':'*',
'ZUMO-API-VERSION': '2.0.0'
}
};
But when I tried to run it, the console returns the following error:
which states that the header for ZUMO-API-VERSION must be specified.
Below is my code for GET and POST
GET:
function getNames() {
$http.get('https://test-evangelists-1.azurewebsites.net/tables/people', config)
.then(function (res) {
console.log(res);
$scope.people = res.data;
});
}
POST
function addName(user){
//$scope.categories.push(user);
alert("about to post!")
$http.post('https://test-evangelists-1.azurewebsites.net/tables/people', user, config)
.then(function (res) {
$scope.getNames();
});
}
Since I have already specified the header in my variable, I wonder what can be wrong here. Any help will be appreciated.
UPDATE:
I figured out that the Id must be appended to the URL before I can perform delete. However, I need to run a GET to retrieve the ID given the parameters but I am still encountering errors when getting the ID.
This is now my Delete function
function delName(user) {
alert("About to delete. Action cannot be undone. Continue?")
var retrievedId = "";
$http.get('https://test-evangelists-1.azurewebsites.net/tables/people', {
params: { name: user.name, location: user.location },
headers: { 'Access-Control-Allow-Origin': '*', 'ZUMO-API-VERSION': '2.0.0' }
})
.then(function (res) {
retrievedId = res.id;
alert(retrievedId);
});
$http.delete('https://test-evangelists-1.azurewebsites.net/tables/people/' + retrievedId, config)
.then(function (res) {
$scope.getNames();
});
}
Does anyone know what is wrong in the GET command when getting the ID?
UPDATE 2: I have written instead an Web Method (asmx) that will connect to SQL server to retrieve the ID passing the needed parameters. The ID will be returned as a string literal but in JSON format. Then I called JSON.parse to parse the string into JSON object then assigned the ID to a variable to which I appended in the URL. –
This is now my Delete function after I have written the Web Method.
function delName(user) {
var confirmres = confirm("You are about to delete this record. Action cannot be undone. Continue?");
var retrievedId = "";
if (confirmres == true) {
//get the ID via web service
$http.get('\\angular\\EvangelistsWebService.asmx/GetId', {
params: { name: user.name, location: user.location },
headers: { 'Access-Control-Allow-Origin': '*', 'ZUMO-API-VERSION': '2.0.0' },
dataType: "json",
contentType: "application/json; charset=utf-8"
})
.then(function (res) {
$scope.retData = res.data;
var obj = JSON.parse($scope.retData);
angular.forEach(obj, function (item) {
if (item.length == 0)
alert('No data found');
else {
//perform delete after getting the ID and append it to url
$http.delete('https://test-evangelists-1.azurewebsites.net/tables/people/' + item.id, config)
.then(function (res) {
$scope.getNames();
});
alert(item.id + ' deleted');
}
});
});
}
}
That is one way that I have learned on how to call HTTP DELETE on AngularJS. But I don't know if that is the optimal one. In any case, that works for me, unless there will be other suggestions.
$http.delete only has one parameter (config), not two (data, config).
Delete API
delete(url, [config]);
vs.
Post API
post(url, data, [config]);
To your updated problem:
To delete an item from your table, it appears the correct url is:
/tables/tablename/:id
Note the : before id.
I have a code
transformRequest: function(obj) {
var str = [];
for(var p in obj)
str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
return str.join("&");
}
I know this code is change the serialization algorithm and post the data with the content-type, "application/x-www-form-urlencoded". But i dont know what is syntax of it . What is obj in function . Please explain for me . Thank
Transform Request is generally used for converting request data in the format which can be easily handled by server (Your Back end code).
For Example - If you want to send data with some modification in request then you can use it .
$scope.save = function() {
$http({
method: 'POST',
url: "/Api/PostStuff",
//IMPORTANT!!! You might think this should be set to 'multipart/form-data'
// but this is not true because when we are sending up files the request
// needs to include a 'boundary' parameter which identifies the boundary
// name between parts in this multi-part request and setting the Content-type
// manually will not set this boundary parameter. For whatever reason,
// setting the Content-type to 'undefined' will force the request to automatically
// populate the headers properly including the boundary parameter.
headers: { 'Content-Type': undefined},
//This method will allow us to change how the data is sent up to the server
// for which we'll need to encapsulate the model data in 'FormData'
transformRequest: function (data) {
var formData = new FormData();
//need to convert our json object to a string version of json otherwise
// the browser will do a 'toString()' on the object which will result
// in the value '[Object object]' on the server.
formData.append("model", angular.toJson(data.model));
//now add all of the assigned files
for (var i = 0; i < data.files; i++) {
//add each file to the form data and iteratively name them
formData.append("file" + i, data.files[i]);
}
return formData;
},
//Create an object that contains the model and files which will be transformed
// in the above transformRequest method
data: { model: $scope.model, files: $scope.files }
}).
success(function (data, status, headers, config) {
alert("success!");
}).
error(function (data, status, headers, config) {
alert("failed!");
});
};
};
I'm trying to learn ExpressJS and I'm having trouble getting IP address from an Express route to display in the browser via Angular controller.
I'm using 2 Nodejs modules (request-ip and geoip2) to get the IP and then lookup geolocation data for that IP. Then trying to use Angular to display the geolocation data in the browser using an Angular $http get call.
My Express route for the IP:
// get IP address
router.get('/ip', function (req, res, next) {
console.log('requestIP is ' + ip);
// geolocation
geoip2.lookupSimple(ip, function(error, result) {
if (error) {
//return res.status(400).json({error: 'Something happened'});//default
return res.sendStatus(400).json({error: 'Something happened'});
}
else if (result) {
return res.send(result);
}
});
});
And my AngularJS controller code:
function MainController($http) {
var vm = this;
vm.message = 'Hello World';
vm.location = '';
vm.getLocation = function() {
$http({
method: 'GET',
url: 'localhost:8000/ip'
}).then(function (result) {
console.log(result);
return vm.location = result;
});
};
};
The Hello World message displays but not the location...? I can also go to localhost:8000/ip and see the JSON result. The result doesn't appear in Chrome's console either. The result is a json object like this:
{"country":"US","continent":"NA","postal":"98296","city":"Snohomish","location":{"accuracy_radius":20,"latitude":47.8519,"longitude":-122.0921,"metro_code":819,"time_zone":"America/Los_Angeles"},"subdivision":"WA"}
I'm not sure why the Hello Word displays and the location doesn't when it seems that I have everything configured correctly... so obviously I'm doing something wrong that I don't see...?
You have initialised 'vm.location' as a string when in fact it is a JSON object.
vm.location = {};
You need to adjust the url paramater in your request to:
url: '/ip'
As you are sending back JSON from Express.js, you should change your response line to:
return res.json(result);
Do you call vm.getLocation() somewhere in your code after this?
The data you need is under result.data from the response object.
Also in order to display the data in the html you have to specify which property to display from the vm.location object (vm.location.country, vm.location.city etc..).
From angular docs about $http:
The response object has these properties:
data – {string|Object} – The response body transformed with the transform functions.
status – {number} – HTTP status code of the response.
headers – {function([headerName])} – Header getter function.
config – {Object} – The configuration object that was used to generate the request.
statusText – {string} – HTTP status text of the response.
Is this express js and angular hosted on the same port? If so please replace your
$http({
method: 'GET',
url: 'localhost:8000/ip'
}).then(function (result) {
console.log(result);
return vm.location = result;
});
with
$http({
method: 'GET',
url: '/ip'
}).then(function (result) {
console.log(result);
return vm.location = result;
});
It may be considered as CORS call and you have it probably disabled.
You can also specify second function to then (look code below) and see if error callback is called.
$http({
method: 'GET',
url: '/ip'
}).then(function (result) {
console.log(result);
return vm.location = result;
}, function (error) {
console.log(error);
});
I have an array of photo files that needed to upload to Azure Cloud Storage, and i using foreach loop to call upload as below:
$scope.savetemplate = function () {
var imagePathsArray = [];
$scope.filesimage = [];
$scope.filesimage.push($scope.file1);
$scope.filesimage.push($scope.file2);
$scope.filesimage.push($scope.file3);
for (var i in $scope.filesimage) {
$scope.upload($scope.filesimage[i]);
}
$scope.data.Images = imagePathsArray ;
$http({
//after finish uploads i need to post the paths
//of all images to save into database
})
};
$scope.upload = function (file) {
Upload.upload({
url: '/uploadImage',
data: { file: file }
}).then(function (resp) {
imagePathsArray.push(resp.data);
})
};
resp.data returns azure storage path and i need to push the paths into the imagePathsArray
How can i uses Angular Promise to wait for upload all the files finished and all the paths are stored in the imagePathsArray so i can proceed with
$scope.data.Images = imagePathsArray ;
so that i can get the paths in the array and perform $http post?
You can do that with $q.all.
var promises = [];
for (var i in $scope.filesimage) {
promises.push(upload($scope.filesimage[i]));
}
$q.all(promises).then(function() {
$scope.data.Images = imagePathsArray ;
$http.post({
//after finish uploads i need to post the paths
//of all images to save into database
});
});
function upload(file) {
return Upload.upload({
url: '/uploadImage',
data: { file: file }
}).then(function (resp) {
imagePathsArray.push(resp.data);
})
};
In the success callback of the upload function, after pushing the path:
imagePathsArray.push(resp.data);
if(imagePathsArray.length == $scope.filesimage.length){
pushtoDatabase();
}
Inside pushtoDatabase call the $http({ .... });
NOTE : You might like to consider the probability of the upload getting failed. In that case you can work-around using a counter of failed files say failCounter , and then inside the if check for the condition
if ((imagePathsArray.length + failCounter) == $scope.filesimage.length){....}
I'm using $http on angularjs, and I have a fairly big request to send.
I'm wondering if there a way to do something like this:
content = "I'm a very long content string!"
$http.post content, url, 'gzip'
and have the post request content auto-gzipped and add an appropriate request header, so the server will know to unzip the content and pass it correctly to the controller
I can gzip the content on my side, and re-open it manually on the server, but I thought there should be some way to do it automatically. Is there?
See this post, like that you could give a parameter on the model so the server can decide if the content is a file and if the file should be unziped first
function Ctrl($scope, $http) {
//a simple model to bind to and send to the server
$scope.model = {
gzip: true,
file: true
};
//an array of files selected
$scope.files = [];
//listen for the file selected event
$scope.$on("fileSelected", function (event, args) {
$scope.$apply(function () {
//add the file object to the scope's files collection
$scope.files.push(args.file);
});
});
//the save method
$scope.save = function() {
$http({
method: 'POST',
url: "/Api/PostStuff",
//IMPORTANT!!! You might think this should be set to 'multipart/form-data'
// but this is not true because when we are sending up files the request
// needs to include a 'boundary' parameter which identifies the boundary
// name between parts in this multi-part request and setting the Content-type
// manually will not set this boundary parameter. For whatever reason,
// setting the Content-type to 'false' will force the request to automatically
// populate the headers properly including the boundary parameter.
headers: { 'Content-Type': false },
//This method will allow us to change how the data is sent up to the server
// for which we'll need to encapsulate the model data in 'FormData'
transformRequest: function (data) {
var formData = new FormData();
//need to convert our json object to a string version of json otherwise
// the browser will do a 'toString()' on the object which will result
// in the value '[Object object]' on the server.
formData.append("model", angular.toJson(data.model));
//now add all of the assigned files
for (var i = 0; i < data.files; i++) {
//add each file to the form data and iteratively name them
formData.append("file" + i, data.files[i]);
}
return formData;
},
//Create an object that contains the model and files which will be transformed
// in the above transformRequest method
data: { model: $scope.model, files: $scope.files }
}).
success(function (data, status, headers, config) {
alert("success!");
}).
error(function (data, status, headers, config) {
alert("failed!");
});
};
};