$http Post Multipart/form-data Boundary Not Set

I am setting the boundary for the below post call but on chrome the boundary looks different from the one I set. how do I get my custom boundary '--test' to show up on the request

Solution 1:

I can interpret your question in 2 ways:

1. You are talking about why you are not getting ------WebKitFormBoundaryB5LjM2a6Qly3Xruj in the POST request header, which you are getting in the request payload. I had the same issue while sending a multi-part formdata using $http.post (also I was using FormData).The solution to this is using $http(config).To my understanding $http.post underlying uses $http() itself to generate XMLHttpRequest object, which should run the multipart/form-data encoding algorithm to set the multipart boundary in payload and the header as well. In $http.post, it seems whenever you give a custom config object it overwrites the header generated by the algorithm. This answer is also helpful.

2. If you just want to add a custom multipart boundary in the content-header, then you can achieve that by add a tranformRequest function in the config object:

   var url = '/site/apkUpload';
   var deferred = $q.defer();
   console.log(formdata);
   $http.post(url, formdata, {
       processData: false,
       transformRequest: function (data, headers) {
           var boundary = yourCustomLogic();
           headers()['Content-Type'] = 'multipart/form-data;charset=utf-
           8;boundary=' + boundary;
       },
       'Accept': ...,
       'x-access-token': token,
       'cache-control': 'max-age=0'
   })
   .success( function () {...});