HTTP POST using Angular.js

问题:

I'm new to the scene and I want to use Angular.js to make an HTTP POST request. I'm accessing PHP scripts which have parameters that are just POST variables. What gets returned from each script is a JSON string. Normally in an HTML form you can make such a request like:

<form method="post" action="url.php">
<input name="this">
<input name="that">
<input value="Submit">
</form>

Depending on your input and after you click submit, JSON data1 will return something like this: { "code" : 1 }

I have no access to the scripts or to the servers that hosts them.

I was wondering if it's possible for Angular.js to read the JSON data1, match that data1 to what they're defined in my JSON data2, and then output them to my view (<pre>data2</pre>).

For example, if { "code" : 1 } is retrieved, I want my JSON to output the value for code #1:

{ "code" : [
  { 1: "User already logged in." }, 
  { 2: "Wrong parameters, try again."}, 
  { 3: "etc., etc." }
 ] 
};

Here's my attempt:

<form ng-controller="PhpCtrl" name="f1">
<input type="text" name="name">
<input type="text" name="password">
<pre ng-model="codeStatus">{{codeStatus}}</pre>
<input type="submit" ng-click="add()" value="Submit">
</form>

function PhpCtrl($scope, $http, $templateCache) {
    $scope.method = 'POST';
    $scope.url = 'url.php';
    $scope.codeStatus = "";

    $scope.add = function() {

        $http({
            method: $scope.method, 
            url: $scope.url,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},  
            cache: $templateCache
        }).
        success(function(response) {
            $scope.codeStatus = response.data;
        }).
        error(function(response) {
            $scope.codeStatus = response || "Request failed";
        });
        return false;   
    };
}

All it's posting so far to the view is "Request failed" lol, although it's processing HTTP/1.1 200. I know I still have a ways to go but I would appreciate any help. Once I figure out how to post the proper JSON data1 to the view, the next step is matching and outputting the appropriate data2. Thank you in advance!

回答1:

Acctually the problem is in the backend with PHP you don't retrieve the posted data like usual, this worked for me:

function PhpCtrl($scope, $http, $templateCache) {
  var method = 'POST';
  var url = 'url.php';
  $scope.codeStatus = "";
  $scope.add = function() {
    var FormData = {
      'name' : document.f1.name.value,
      'password' : document.f1.password.value
    };
    $http({
      method: method,
      url: url,
      data: FormData,
      headers: {'Content-Type': 'application/x-www-form-urlencoded'},
      cache: $templateCache
    }).
    success(function(response) {
        $scope.codeStatus = response.data;
    }).
    error(function(response) {
        $scope.codeStatus = response || "Request failed";
    });
    return false;
  };
}

in the PHP file:

$data = json_decode(file_get_contents("php://input"));
echo $data->name;

Hope this help.

回答2:

Rather old post... but I figure my solution might come in handy for others as well.

I did not like the

json_decode(file_get_contents("php://input"));

solution... Basically because it seems against good practice (I might be wrong on this)

This is how I got it solved (adapted to the example above)

function PhpCtrl($scope, $http, $templateCache) {
  var method = 'POST';
  var url = 'url.php';
  $scope.codeStatus = "";
  $scope.add = function() {
    var FormData = {
      'name' : document.f1.name.value,
      'password' : document.f1.password.value
    };
    $http({
      method: method,
      url: url,
      data: $.param({'data' : FormData}),
      headers: {'Content-Type': 'application/x-www-form-urlencoded'},
      cache: $templateCache
    }).
    success(function(response) {
        $scope.codeStatus = response.data;
    }).
    error(function(response) {
        $scope.codeStatus = response || "Request failed";
    });
    return false;
  };
}

once this done

data: $.param({'data' : FormData}),
headers: {'Content-Type': 'application/x-www-form-urlencoded'},

you can access the data you normally would in PHP

$data = $_POST['data'];

回答3:

A possible alternative it is to use an XHR request handler to serialize the payload of the POST request.

$httpProvider.interceptors.push(['$q', function($q) {
    return {
        request: function(config) {
            if (config.data && typeof config.data === 'object') {
                // Check https://gist.github.com/brunoscopelliti/7492579 for a possible way to implement the serialize function.
                config.data = serialize(config.data);
            }
            return config || $q.when(config);
        }
    };
}]);

Moreover, if you didn't do it before, you've also to change the default content-type header of the post request:

$http.defaults.headers.post["Content-Type"] = 
    "application/x-www-form-urlencoded; charset=UTF-8;";

Recently I wrote a post on my blog, where you could find more info about this approach, and XHR request interceptor.