How to upload Image on server using ReactNative

Question

I am setting headers and body , Using fetch with Post to upload image on server.I am getting the response code 200 but it is not uploading image but rest of the Data is getting uploaded.

Here is the code of body:

export default function setRequestBody(imagePath){

    let boundry = "----WebKitFormBoundaryIOASRrUAgzuadr8l";

    let body = new FormData();

    body.append("--"+boundry+"\r\n");
    body.append("Content-Disposition: form-data; name=imageCaption\r\n\r\n");
    body.append("Caption"+"\r\n");
    body.append("--"+boundry+"\r\n");
    body.append("Content-Disposition: form-data; name=imageFormKey; filename =iimageName.pngg \r\n");
    body.append("Content-Type: image/png \r\n\r\n");
    body.append({uri : imagePath});
    // appened image Data Here
    body.append("\r\n");
    body.append("--"+boundry+"--\r\n");
    return body

}

Please help.What mistake I am making. :(

Answer 1

I've found the solution:

let body = new FormData();
body.append('photo', {uri: imagePath,name: 'photo.png',filename :'imageName.png',type: 'image/png'});
    body.append('Content-Type', 'image/png');

fetch(Url,{ method: 'POST',headers:{  
     "Content-Type": "multipart/form-data",
     "otherHeader": "foo",
     } , body :body} )
  .then((res) => checkStatus(res))
  .then((res) => res.json())
  .then((res) => { console.log("response" +JSON.stringify(res)); })
  .catch((e) => console.log(e))
  .done()

** filename is optional...

Answer 2

The problem is body.append({uri : imagePath}); because react native JSC does not support File and Blob, so you have to use libraries.

react-native-fetch-blob has very good support for this, example from its README.md

    RNFetchBlob.fetch('POST', 'http://www.example.com/upload-form', {
        Authorization : "Bearer access-token",
        otherHeader : "foo",
        'Content-Type' : 'multipart/form-data',
    }, [
    // element with property `filename` will be transformed into `file` in form data
    { name : 'avatar', filename : 'avatar.png', data: binaryDataInBase64},
    // custom content type
    { name : 'avatar-png', filename : 'avatar-png.png', type:'image/png', data: binaryDataInBase64},
    // part file from storage
    { name : 'avatar-foo', filename : 'avatar-foo.png', type:'image/foo', data: RNFetchBlob.wrap(path_to_a_file)},
    // elements without property `filename` will be sent as plain text
    { name : 'name', data : 'user'},
    { name : 'info', data : JSON.stringify({
      mail : '[email protected]',
      tel : '12345678'
    })},
  ]).then((resp) => {
    // ...
  }).catch((err) => {
    // ...
  })