当我调用post方法(get方法工作正常)post参数在服务器端获取空数据时，反应本机Axios或fetch [英] React native Axios or fetch when i called post method (get method working fine) post parameters are getting null data on server side

问题描述

在调用post方法时，在服务器端获取null参数(PHP-Codeigniter).当我使用 JSON.stringify 时，它可以工作，但是在服务器端，我必须使用有效负载来处理请求( $ request_body = file_get_contents('php://input'))到现在还可以，问题是当我尝试上传文件(视频/图像)时，不支持有效负载.因此，如果我使用表单数据，则会引发网络错误，这意味着Axios甚至都没有进入服务器.我已经测试了来自javascript，php的相同服务，并且postman都工作正常，只有react-native调用失败了.那是3天的解决方案了，我正在尝试通过更改标头内容来解决这一问题，这是另一种方法，仍然无法明白.

When called the post method getting null parameters on the server-side (PHP - Codeigniter). When I used JSON.stringify it is working but on the server-side, I have to handle the request with the payload ( $request_body = file_get_contents('php://input')) as of now is fine, Problem is when I am trying to upload a file (Video/ Image) , Payload won't support. So If I am using the form data it is throwing network error it means Axios did not even go to the server. I have tested the same service from javascript,php, and postman all are working fine only react-native call failing So what is the solution it's been 3 days I am trying for this by changing the header content is a different way still not able to understand.

以下给出的代码

   // alert('check ');
    // const res = DocumentPicker.pick({
    //     type: [DocumentPicker.types.allFiles],
    // }).catch(error => {
    //     alert('doct' + error);
    // });
    //Printing the log realted to the file  
    const imageUrl = 'https://image.shutterstock.com/image-photo/floral-spring-natural-landscape-wild-260nw-1274207287.jpg';
    // if (true) {
    // const fileToUpload = res;
    const formData = new FormData();
    formData.append('name', 'Image Upload');
    formData.append('file_attachment', {
        uri: imageUrl,
        type: "image/jpg",
        name: 'floral-spring-natural-landscape-wild-260nw-1274207287.jpg'
    });
    Axios({
        url: URL + '/VideosController/upload',
        method: 'POST',
        data: formData,
        headers: {
            'Accept': 'application/json',
            'Content-Type': 'multipart/form-data'
        },
    }).then(
        response => {
            alert('res' + JSON.stringify(response.data));
        },
        error => {
            alert('check+ ' + error);
        })
        .catch(error => {
            alert('No error' + error);
        });

服务器端PHP代码

header("Access-Control-Allow-Methods: GET,POST, OPTIONS");
header("Access-Control-Allow-Headers: Content-Type, Content-Length, Accept-Encoding");
// By searching i seen it might cors error so added headers on top of my method no use



  if(!empty($_FILES['file_attachment']['name'])) {
    $res        = array();
    $name       = 'file_attachment';
    $imagePath  = 'assets/upload/file_attachment';
    $temp       = explode(".",$_FILES['file_attachment']['name']);
    $extension  = end($temp);
    $filenew    = str_replace($_FILES['file_attachment']['name'],$name,$_FILES['file_attachment']['name']).'_'.time().''. "." .$extension;          
    $config['file_name']   = $filenew;
    $config['upload_path'] = $imagePath;
   
    $this->upload->initialize($config);
    $this->upload->set_allowed_types('*');
     print_r($_FILES);
    exit;
    $this->upload->set_filename($config['upload_path'],$filenew);
    
    if(!$this->upload->do_upload('file_attachment')) {
      $data = array('msg' => $this->upload->display_errors());
    } else {
      $data = $this->upload->data();    
      if(!empty($data['file_name'])){
        $res['url'] = 'assets/upload/file_attachment/'.$data['file_name']; 
      }
      if (!empty($res)) {
    echo json_encode(array("status" => 1, "data" => array() ,"msg" => 'upload successfully', 'base_url' => base_url(), "count" => '0'));
      }else{
    echo json_encode(array("status" => 1,"data" => array() ,"msg" => 'not found', 'base_url' => base_url(), "count" => '0'));
      }
    }
  }

当我使用formdData时出错:

Error when i am using formdData:

错误=错误:在EventTarget.handleError(http://localhost的createError(http://localhost:8081/index.bundle?platform = android& dev = true& minify = false:155044:17)处出现网络错误:EventTarget.dispatchEvent(http://localhost:8081/index.bundle?platform = android& dev = true& minify =处的:8081/index.bundle?platform = android& dev = true& minify = false:154946:16)false:34135:27)，位于EventTarget .__ didCompleteResponse(http://localhost:8081/index.bundle?platform = android& dev = true& minify = false:33046:16)，网址为http://localhost:8081/index.bundle?platform = android& dev = true& minify = false:33156:47在RTCDeviceEventEmitter.emit(http://localhost:8081/index.bundle?platform = android& dev = true& minify = false:3422:37)在MessageQueue .__ callFunction(http://localhost:8081/index.bundle?platform = android& dev = true& minify = false:2750:44)，网址为http://localhost:8081/index.bundle?platform = android& dev = true& minify = false:2472:17在MessageQueue .__ guard(http://localhost:8081/index.bundle?platform = android& dev = true& minify = false:2704:13)

error = Error: Network Error at createError (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:155044:17) at EventTarget.handleError (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:154946:16) at EventTarget.dispatchEvent (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:34135:27) at EventTarget.setReadyState (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:33219:20) at EventTarget.__didCompleteResponse (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:33046:16) at http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:33156:47 at RCTDeviceEventEmitter.emit (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:3422:37) at MessageQueue.__callFunction (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:2750:44) at http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:2472:17 at MessageQueue.__guard (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false:2704:13)

请说明实际情况以及解决方案.

Please explain the subject of what is actually happening and the solution.

推荐答案

最后，我找到了将FLIPPER_VERSION升级到0.41.0的解决方案，此问题已解决，但如果我升级应用程序甚至无法为我打开.所以现在我所做的是在下面的文件中，我仅对这些行进行了评论.为我工作.

Finally, I found the solution by upgrading the FLIPPER_VERSION to 0.41.0 this issue gets resolved but If I upgraded the app not even opening for me. So for now what I did is in the below file I just commented on these lines. worked for me.

\ android \ app \ src \ debug \ java \ com \ appname \ ReactNativeFlipper.java

\android\app\src\debug\java\com\appname\ReactNativeFlipper.java

public void apply(OkHttpClient.Builder builder) {
            //  builder.addNetworkInterceptor(new FlipperOkhttpInterceptor(networkFlipperPlugin));
            }

我刚刚在这一行中发表了评论，以寻求更多帮助，您可以查看下面的链接

I just commented this line for more assistance you can check the below link

URL: https://github.com/facebook/react-native/issues/28551#issuecomment-656601532

如果您想更新鳍状肢的版本，将在以下位置提供.. \ android \ gradle.properties

If you wanna update flipper version it will be available at ..\android\gradle.properties

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