Phonegap fileTransfer.Download 不工作错误代码 3

Question

在我在 android 4.4 上运行 phonegap cordova 3.5 的应用程序中，使用文件传输插件上传文件效果很好，但下载会产生异常。我在设备和模拟器 blueStacks 上进行了测试 此代码适用于cordova 2.9，但是当我将cordova 更新到3.5 时，下载创建异常

下载功能：

download = function () {    
    viewModel.popup_download.visible(false);
    loadPanelVisible(true);
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSystem) {
      fileSystem.root.getFile(viewModel.file_download_name(), {create: true, exclusive: false}, function() {
        var ft = new FileTransfer(); 
        uri="https://api.exemple-exemple.com/api/Dav/Download/"+path+"/"+viewModel.folder_downlod();
        filePath=currPath+"/"+viewModel.file_download_name();

        ft.download(uri,filePath,win_download,fail_download,false, {
                headers: { 
                   "HeaderUserData": JSON.stringify({ ID: id, Token: token }),
                   "HeaderDavData": JSON.stringify({ UserName: viewModel.userId_dav(), Password: viewModel.userPassword_dav() }),
                }
        });

      }, fail);
    }, fail); 
}

Answer 1

您在空格和特殊字符方面遇到问题，您必须在发送请求之前使用 encodeURI。

download = function () {    
viewModel.popup_download.visible(false);
loadPanelVisible(true);
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSystem) {
  fileSystem.root.getFile(viewModel.file_download_name(), {create: true, exclusive: false}, function() {
    var ft = new FileTransfer(); 
    uri="https://api.phosphorus-technologies.com/api/Dav/Download/"+path+"/"+viewModel.folder_downlod();
    filePath=currPath+"/"+viewModel.file_download_name();

    uri = encodeURI(uri);

    ft.download(uri,filePath,win_download,fail_download,false, {
            headers: { 
               "HeaderUserData": JSON.stringify({ ID: id, Token: token }),
               "HeaderDavData": JSON.stringify({ UserName: viewModel.userId_dav(), Password: viewModel.userPassword_dav() }),
            }
    });

  }, fail);
}, fail);} 

Answer 2

从未定义变量 currPath，我认为您根本不想使用它。您从 viewModel 传递了您的下载文件夹，然后在回调中获取文件夹结果。

download = function () {    
    viewModel.popup_download.visible(false);
    loadPanelVisible(true);
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSystem) {
      fileSystem.root.getFile(viewModel.folder_downlod(), {create: true, exclusive: false}, function(filePath) { // ADD PARAMETER HERE
        var ft = new FileTransfer(); 
        uri="https://api.phosphorus-technologies.com/api/Dav/Download/"+path+"/"+viewModel.folder_downlod(); //IS THIS A VALID URL ENDING IN THE FOLDER NAME?
//REMOVE FILE PATH HERE
        ft.download(uri,filePath,win_download,fail_download,false, {
                headers: { 
                   "HeaderUserData": JSON.stringify({ ID: id, Token: token }),
                   "HeaderDavData": JSON.stringify({ UserName: viewModel.userId_dav(), Password: viewModel.userPassword_dav() }),
                }
        });

      }, fail);
    }, fail); 
}

您构建以文件夹结尾的 API 调用让我担心，因为此代码仅适用于下载单个文件。我认为可能只是命名不一致。