react-native - Unhandled promise rejection: TypeError: Network request failed in react native

Question

I am new to react native. I have crated a form. from this form I am uploading images to server. But the problem not a single data uploading to server. So what is problem is my code is wrong or what please help . I am not getting any specific error. please help. thanks. and my other forms is submitting properly they have not any images to upload but only problem with this form becuase here is images to upload

here is my code

export default function Add(props) {

  const { navigation } = props

  const [singleFilePAN, setSingleFilePAN] = useState('');
  const [singleFileADH, setSingleFileADH] = useState('');
  const [singleFileADH1, setSingleFileADH1] = useState('');
  const [singleFileSIGN, setSingleFileSIGN] = useState('');
  const [imageArray, setImageArray] = useState({
    PAN: null,
    GST: null,
    ADH: null,
    ADH1: null,
  });

 const validateInputs = () => {

    console.log(singleFilePAN)
    console.log(singleFileADH)
    console.log(singleFileADH1)
    console.log(singleFileSIGN)
    
    if (singleFilePAN && singleFileADH && singleFileADH1 && singleFileSIGN != null) 
    {
    if (!/[A-Z]{5}[0-9]{4}[A-Z]{1}/.test(PAN) && imageArray.GST === null){
      setPanError('Please Insert valid PAN Card Image \n And Valid Pan card number')
      return;
    }
    if (!/^[0-9]{2}[A-Z]{5}[0-9]{4}[A-Z]{1}[1-9A-Z]{1}Z[0-9A-Z]{1}$/.test(GST))  {
      setGstError('Please Insert valid GST Number')
      return;
    }
    if (!/^\d{4}\s\d{4}\s\d{4}$/.test(ADH)) { 
      setAdhError('Please Insert valid Aadhar Card Image \n And Valid Adhar card number')
      return;
    }
    else 
    {

        //+++++++++++++++++++++++++++++++++=submitting form data to api start+++++++++++++++++++++++++++++++++++
{

  const leadTagNumber = props.route.params.leadTagNumber

    AsyncStorage.multiGet(["application_id", "created_by",'leadTagNumber']).then(response => {

  const formData = new FormData();


formData.append('lead_tag_number',leadTagNumber);
formData.append('pan_card_number', PAN);
formData.append('gstin_number', GST);
formData.append('aadhar_card_number', ADH);
formData.append('idfy_pan_card_status', "Done");
formData.append('idfy_aadhar_card_status',"Done");
formData.append('entry_sorce', "App");
formData.append('created_by', response[1][1]);
formData.append('application_id', response[0][1]);
formData.append('is_active', "Y");
formData.append('is_deleted', "N");
formData.append('created_time', "");

formData.append('upload_pancard', 
  {
    uri: singleFilePAN,
    name: 'pancardImage.jpg',
    type: 'image/jpg/png'
  }
);
formData.append('upload_aadhar', 
    {
        uri: singleFileADH,
        name: 'upload_aadhar.jpg',
        type: 'image/jpg/png'
    }
);
formData.append('upload_aadhar_second', 
    {
        uri: singleFileADH1,
        name: 'upload_aadhar_second.jpg',
        type: 'image/jpg/png'
    }
);
formData.append('digital_signature', 
    {
        uri: singleFileSIGN,
        name: 'digital_signature.jpg',
        type: 'image/jpg/png'
    }
);

  fetch('https://nasdigital.tech/Android_API_CI/upload_multipart_data', {
      method: 'POST',
      headers: {'Accept': 'application/json, text/plain, */*', "Content-Type": "application/json" },

      body: formData

    })
    .then((returnValue) => returnValue.json())
    .then(function(response) {
      console.log(response)
      Alert.alert("File uploaded");
      return response.json();
      
     
    });
  });
  // event.preventDefault();
  }
  //+++++++++++++++++++++++++++++++++submitting form data to api end++++++++++++++++++++++++++++++++++++++

      Alert.alert("success")
      return;
}
    }
  };

 const takePicture = async (type) => {
    if (camera) {

      const data = await camera.takePictureAsync({
        mediaTypes: ImagePicker.MediaTypeOptions.All,
      });

      console.log(data.uri);
      const newImageArr = imageArray;
      if (imageType === 'PAN') {
        newImageArr.PAN = data.uri;
      }else if (imageType === 'ADH' && evenTry) {
        newImageArr.ADH = data.uri;
        setEvenTry((val) => !val);
      } else if (imageType === 'ADH' && !evenTry) {
        newImageArr.ADH1 = data.uri;
        setEvenTry((val) => !val);
      }
      setImageArray({...newImageArr});
      
      setShowCamera(false);
      setImageType('');
      setSingleFilePAN({ singleFilePAN: newImageArr.PAN});
      setSingleFileADH({ singleFileADH: newImageArr.ADH});
      setSingleFileADH1({ singleFileADH1: newImageArr.ADH1});
    }
  };


  const pickImage = async (type) => {
    let result = await ImagePicker.launchImageLibraryAsync({
      mediaTypes: ImagePicker.MediaTypeOptions.All,
    });

    console.log(result.uri);
    if (!result.cancelled) {
      const newImageArr = imageArray;
      if (type === 'PAN') {
        newImageArr.PAN = result.uri;
      } else if (type === 'ADH' && evenTry) {
        newImageArr.ADH = result.uri;
        setEvenTry((val) => !val);
      } else if (type === 'ADH' && !evenTry) {
        newImageArr.ADH1 = result.uri;
        setEvenTry((val) => !val);
      }
      setImageArray({ ...newImageArr });
     setSingleFilePAN({ singleFilePAN: newImageArr.PAN});
     setSingleFileADH({ singleFileADH: newImageArr.ADH});
     setSingleFileADH1({ singleFileADH1: newImageArr.ADH1});
    }

please ignore this = I am new to react native. I have crated a form. from this form I am uploading images to server. But the problem not a single data uploading to server. So what is problem is my code is wrong or what please help . I am not getting any specific error. please help. thanks

标签： react-nativemultipartform-datamultipart

Answer 1

我认为您通过图像传递的表单数据类型错误，如果您不传递要发送的数据类型，BE 可能不会得到它

代替

{
    uri: singleFilePAN,
    name: 'pancardImage.jpg', <- don't add extenstion
    type: 'image/jpg/png' <- bad type 
}

{
    uri: singleFilePAN,
    name: 'pancardImage', 
    type: 'image/jpg' 
}

在此处检查所有 MIME 类型 -> MIME DOCS