angularjs - Convert .ajax to $http - Method not Allowed (405) -

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i attempting convert .ajax $http use in angular app, throwing "method not allowed" error. believe missing obvious, can't figure out failing.

here .ajax version:

function uploadfilesync(spweburl , library, filename, file)          {             var reader = new filereader();             reader.onloadend = function(evt)              {                 if (evt.target.readystate == filereader.done)                  {                     var buffer = evt.target.result;                     var completeurl = spweburl                       + "/_api/web/lists/getbytitle('"+ library +"')"                       + "/rootfolder/files/add(url='"+ filename +"',overwrite='true')?"                       + "@targetlibrary='"+library+"'&@targetfilename='"+ filename +"'";                      $.ajax({                         url: completeurl,                         type: "post",                         data: buffer,                         async: false,                         processdata: false,                         headers: {                             "accept": "application/json;odata=verbose",                             "x-requestdigest": $("#__requestdigest").val(),                             "content-length": buffer.bytelength                         },                         complete: function (data) {                             //uploaded pic url                             console.log(data.responsejson.d.serverrelativeurl);                             $route.reload();                         },                         error: function (err) {                             alert('failed');                         }                     });                  }             };             reader.readasarraybuffer(file);         }

here $http version:

function uploadfilesync(spweburl , library, filename, file)      {         var reader = new filereader();         reader.onloadend = function (evt) {             if (evt.target.readystate == filereader.done) {                 var buffer = evt.target.result;                 var completeurl = spweburl                   + "/_api/web/lists/getbytitle('" + library + "')"                   + "/rootfolder/files/add(url='" + filename + "',overwrite='true')?"                   + "@targetlibrary='" + library + "'&@targetfilename='" + filename + "'";                  $http({                     url: completeurl,                     type: "post",                     data: buffer,                     processdata: false,                     headers: {                         "accept": "application/json;odata=verbose",                         "x-requestdigest": $("#__requestdigest").val(),                         "content-length": buffer.bytelength                     }                 }).success(function (data) {                     //uploaded pic url                     //console.log(data.responsejson.d.serverrelativeurl);                     $route.reload();                 }).error(function (err) {                     alert(err);                 });             }         };         reader.readasarraybuffer(file);     }


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