Try this:
https://benjaminhorn.io/code/setting-cors-cross-origin-resource-sharing-on-apache-with-correct-response-headers-allowing-everything-through/
I had similar issues until I made the setting: always set header.... along
with the mod-rewrite rule so that the web server responds with 200 success
as the API wasn't written to perform that.
On Monday, November 16, 2015 at 10:57:02 PM UTC+11, Eng. Chrispinus
Onyancha wrote:
>
>
>
>
> <dom-module id="upload-button">
> <template>
>
> <iron-ajax
> id="advertURL"
> auto
> url="https:\\app-spot.com/get_upload_url"
> handle-as="json"
> method="GET"
> last-response="{{returned_url}}">
> </iron-ajax>
> <iron-ajax
> id="advertsub"
> auto="[[false]]"
> url="{{returned_url}}"
> handle-as="json"
> method="POST"
> params='{{params_advert}}'
> on-response="_returnedResp">
> </iron-ajax>
>
>
> <input hidden name="myupload" id="file"
> value="{{fileName::change}}" on-change="readURL" type="file" class="upload"
> />
>
>
> </template>
> <script>
>
> Polymer({
> is:'upload-button',
>
>
> readURL: function(t) {
> var e =t.srcElement;
> var formData = new FormData();
> for (var i = 0, f; f= e.files[i]; ++i) {
> formData.append(e.name, f,f.name);
> }
>
> this.$.advertsub.body = formData;
>
> this.$.advertsub.contentType = null;
> this.$.advertsub.generateRequest();
> },
>
> _returnedResp:function(e){
>
> console.log(e.detail.response);
>
> }
>
>
> });
>
> </script>
> </dom-module>
>
>
>
> *WHEN I TRY TO select an image and sends i get.*
>
> XMLHttpRequest cannot load
> http://localhost:8080/_ah/upload/ahFwcmVjaXNlLXJheS05NDAwMHIiCxIVX19CbG9iVXBsb2FkU2Vzc2lvbl9fGICAgICAgIAJDA.
>
> No 'Access-Control-Allow-Origin' header is present on the requested
> resource. Origin 'http://localhost' is therefore not allowed access.
> add-advert.html:183
>
>
> HOW DO I HANDLE THIS?
>
> My server uses the blobstore to handle the image.
> I have even added the Access-Control-Allow-Origin on the server redirect
> header but still i failed.
>
>
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>
> *Onyancha Chrispinus*
> Developer
> creativeDNA (U) LTD. <http://www.creativedna.co.ug>
>
> @Google Plus <https://plus.google.com/+ChrispinusOnyancha> , @LinkedIn
> <http://ug.linkedin.com/in/ChrispinusOnyancha>, @Tweeter
> <https://twitter.com/Chrisp_onyanx>
>
>
> <https://play.google.com/store/apps/details?id=com.creativeDNA.ntvuganda&rdid=com.creativeDNA.ntvuganda&rdot=1&feature=md>
>
>
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