Cordova/phonegap：带文件传输插件的 FileTransferError.FILE_NOT_FOUND_ERR

Question

在我的 phonegap 应用程序中，我用相机拍照，它按预期工作。

然后，我想将它发送到我的服务器。我发现发送 base64 编码的字符串是一种不好的做法，我认为最好的解决方案是使用文件传输插件。

所以，我添加了插件并写了这个：

function onPhotoURISuccess(imageURI) {
    try{
        var url = "myserver/addPhoto";
        alert(url);
        var options = new FileUploadOptions();
        options.chunkedMode = false;
        options.fileKey = "recFile";
        var imagefilename = imageURI;
        options.fileName = imagefilename;
        options.mimeType = "image/jpeg";
        options.params = { "token": APP.TOKEN};
        var ft = new FileTransfer();
        alert(imagefilename);
        ft.upload(imageURI, url, win, fail, options); 
    }
    catch (err) {
        alert(err.message);
    }
}

在 try 分支的最后一行，我收到错误 FileTransferError.FILE_NOT_FOUND_ERR。

在此行之前的警报中，我在警报中显示路径（imagefilename 变量）。如果我尝试在我的 Android 设备中手动进入该路径，我将找不到它。路径是file:///storage/emulated/0/Android/data/com.My.App/cache/1505307795417.jpg

所以，我尝试设置选项

saveToPhotoAlbum: true

检查图像是否已保存以及我是否正确地在我的相册中看到了照片。我不知道为什么我在发送时收到错误，可能是路径错误？

我不认为问题出在服务器端，因为我什至在服务器日志中都看不到请求。

更新：

我也在Anuj T的建议下试过这个，但结果还是一样：

function onPhotoURISuccess(imageURI) {
    var filepath;
    window.resolveLocalFileSystemURL(imageURI, function success(fileEntry) {

        // Do something with the FileEntry object, like write to it, upload it, etc.
        // writeFile(fileEntry, imageURI);
        filepath = fileEntry.fullPath;
        alert("got file: " + fileEntry.fullPath);
        // displayFileData(fileEntry.nativeURL, "Native URL");

        try {
            var url = "myUrl";
            alert(url);
            var options = new FileUploadOptions();
            options.chunkedMode = false;
            options.fileKey = "recFile";
            var imagefilename = filepath;
            options.fileName = imagefilename;
            options.mimeType = "image/jpeg";
            options.params = { "token": APP.TOKEN }; // if we need to send parameters to the server request
            var ft = new FileTransfer();
            alert(imagefilename);
            alert(imageURI);

            ft.upload(filepath, url, win, fail, options);
        }
        catch (err) {
            alert(err.message);
        }

    }, function () {
        // If don't get the FileEntry (which may happen when testing
        // on some emulators), copy to a new FileEntry.
        alert("file system fail");
        createNewFileEntry(imgUri);

    });


}

更新 2：

这是我的服务器端代码。

internal GenericResponse AddChiusuraPhoto(string token)
    {
        Utility.Logger("AddChiusuraPhoto");
        var gr = new GenericResponse();
        if (CheckToken(token, out IS_UTENZE utente))
        {
            try
            {
                var md5 = new md5Manager();
                HttpPostedFile file = HttpContext.Current.Request.Files["recFile"];
                if (file == null)
                    return null;
                string targetFilePath = @"C:\ProgramData\" + file.FileName;
                file.SaveAs(targetFilePath);
                Utility.Logger("[AddChiusuraPhoto] Returning lista ");
                return gr;
            }
            catch (Exception ex)
            {
                gr.ESITO = "[KO]";
                gr.MESSAGGIO = ex.ToSafeString();
                Utility.Logger("AddChiusuraPhoto " + gr.MESSAGGIO);
            }
        }
        else
        {
            gr.ESITO = "[KO]";
            gr.MESSAGGIO = "Utente non loggato, impossibile effettuare il logout.";
            Utility.Logger("AddChiusuraPhoto " + gr.MESSAGGIO);
        }
        return gr;
    }

请注意，这是一个 WCF。这是寻址部分：

[OperationContract]
[WebInvoke(UriTemplate = "chiusure/addPhoto", Method = "POST", BodyStyle = WebMessageBodyStyle.Wrapped, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
GenericResponse AddChiusuraPhoto(string token);

Answer 1

需要拍照并获取一个FileEntry对象

如果您需要使用 FileEntry 对象，请在您的 CameraOptions 对象中将 destinationType 设置为 Camera.DestinationType.FILE_URI

更新代码

function getPicture(){

      var srcType = Camera.PictureSourceType.CAMERA;
      var options = setOptions(srcType);
      //var func = createNewFileEntry;

      navigator.camera.getPicture(function cameraSuccess(imageUri) {

          //displayImage(imageUri);
          // You may choose to copy the picture, save it somewhere, or upload.
          //func(imageUri);
          var filename = imageUri.substr(imageUri.lastIndexOf('/') + 1);
          window.resolveLocalFileSystemURL(cordova.file.cacheDirectory, function success(dirEntry) {

              // Do something with the FileEntry object, like write to it, upload it, etc.
              // writeFile(fileEntry, imgUri);
              console.log("got file: " + dirEntry.fullPath);

              console.log("file name " + filename);
              // JPEG file
              dirEntry.getFile(filename, { create: true, exclusive: false }, function (fileEntry) {

                      // Do something with it, like write to it, upload it, etc.
                      // writeFile(fileEntry, imgUri);
                      console.log("got file: " + fileEntry.fullPath);
                      // displayFileData(fileEntry.fullPath, "File copied to");
                      upload(fileEntry);

                  }, onErrorCreateFile);                      
              // displayFileData(fileEntry.nativeURL, "Native URL");
          }, function () {
            // If don't get the FileEntry (which may happen when testing
            // on some emulators), copy to a new FileEntry.
              //createNewFileEntry(imgUri);
          });
          //console.log(imageUri);

      }, function cameraError(error) {
          console.debug("Unable to obtain picture: " + error, "app");

      }, options);
 };

设置选项功能。

function setOptions(srcType) {
  var options = {
      // Some common settings are 20, 50, and 100
      quality: 50,
      destinationType: Camera.DestinationType.NATIVE_URI ,
      // In this app, dynamically set the picture source, Camera or photo gallery
      sourceType: srcType,
      encodingType: Camera.EncodingType.JPEG,
      mediaType: Camera.MediaType.PICTURE,
      allowEdit: false,
      saveToPhotoAlbum:false,
      correctOrientation: true  //Corrects Android orientation quirks
  };
  return options;
}

详细解释见here。

上传文件到服务器

function upload(fileEntry) {

 var fileURL = fileEntry.toURL();

 var success = function (r) {
     console.log("Successful upload..." + JSON.stringify(r));
     console.log("Code = " + JSON.stringify(r.responseCode));
     alert(JSON.stringify(r.response));
     // displayFileData(fileEntry.fullPath + " (content uploaded to server)");
 };

 var fail = function (error) {
     alert("An error has occurred: Code = " + error.code);
     console.log("Error= " + error);
 };

 var options = new FileUploadOptions();
  options.fileKey = "file";
  options.fileName = fileURL.substr(fileURL.lastIndexOf('/') + 1);
  options.mimeType = "text/plain";

var params = {};
 params.value1 = "test";
 params.value2 = "param";

 options.params = params;

 var SERVER = "http://posttestserver.com/post.php";

 var ft = new FileTransfer();
 // SERVER must be a URL that can handle the request, like
 // http://some.server.com/upload.php
 ft.upload(fileURL, encodeURI(SERVER), success, fail, options);
}

当您收到成功警报时，您还可以检查您的参数是否上传到服务器，您将成功收到链接。

希望对您有所帮助。