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How to cancel sending request with OPTION http method?
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This is a migrated thread and some comments may be shown as answers.
Bartlomiej
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Bartlomiej asked on 02 Oct 2018, 11:15 AM
I want to avoid sending request with OPTION http method. With below configuration Kendo sending two requests, first with OPTION method that sending nothing and right after with POST method with file data.
$("#fileupload").kendoUpload({
  async: {
    saveUrl: API_URL+'...',
    withCredentials: false,
    autoUpload: false,
  },
  uploadEventHandler (e) {
    e.headers.set('Access-Control-Allow-Credentials', 'true');
  },
  type: "post",
  error: function (e) {
    var files = e.files;
    if (e.operation === "upload") {
      ...
    }
  },
  upload: function (d) {
    d.data = {
    ...
    };
  },
  showFileList: true,
})

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Plamen
Telerik team
answered on 04 Oct 2018, 06:56 AM
Hello,

Options http request is a common issue that is observed by all cross origin requests and is not specific for Kendo Upload. You can refer to this forum thread where more information about it is provided and possible ways to disable it are added. In Kendo Upload you can use the upload event to add custom headers as it is described here at the bottom of the page.

Regards,
Plamen
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Bartlomiej
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Plamen
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