我的代码有什么问题数据未发送或上传到具有多部分反应本机的服务器

问题描述

我是新来的。我已经从这个表单创建了一个表单，我正在使用 multipart formData 发送和上传图像到服务器。但问题是当我提交数据时没有进入服务器。并且不会出现任何错误。所以请告诉我是不是我写错了代码。或者有什么问题。我在代码中犯了什么错误。

这是我的代码。

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(JSON.stringify('lead_tag_number',leadTagNumber));
formData.append(JSON.stringify('pan_card_number',PAN));
formData.append(JSON.stringify('aadhar_card_number',GST));
formData.append(JSON.stringify('idfy_pan_card_status',"Done"));
formData.append(JSON.stringify('idfy_aadhar_card_status',"Done"));
formData.append(JSON.stringify('entry_sorce',"App"));
formData.append(JSON.stringify('created_by',response[1][1]));
formData.append(JSON.stringify('application_id',response[0][1]));
formData.append(JSON.stringify('is_active',"Y"));
formData.append(JSON.stringify('is_deleted',"N"));
formData.append(JSON.stringify('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://xyz.tech/Android_API_CI/_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});
    }

解决方法

这里您只在表单数据中使用 JSON.stringify('','') 时发送密钥。

您必须在附加键和值的同时分别放置键和值。

例如：

formData.append('lead_tag_number',leadTagNumber);
formData.append('pan_card_number',PAN);
formData.append('aadhar_card_number',GST);
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',"");