MFP 8, Javascript adapters should read the JSON file (TestData.json) placed in
"\src\main\adapter-resources"
I need to read the static array contents from json/text file within the same JAVASCRIPT HTTP adapter. How to do the same ?
Read the static arrays from file (Text/JSON) within same adapter folder.
As explained in this solution, you can read a JSON file with Javascript as shown below.
function readFile(filename) {
var content = "";
var fileReader = new java.io.FileReader(filename);
var bufferedReader = new java.io.BufferedReader(fileReader);
var line;
while((line = bufferedReader.readLine()) != null) {
content += line;
}
bufferedReader.close();
return content;
}
function test() {
var file = 'yourfilename.json';
var fileContents;
try {
fileContents = JSON.parse(readFile(file));
} catch(ex) {
// handle error
}
return {
fileContents: fileContents
};
Related
With the reference of following StackOverflow suggestion,
Convert HTML to PDF in .NET
I tried to convert the HTML file to PDF using HtmlRenderer.PdfSharp but unfortunately it shows compatible error like below,
HtmlRendererCore.PdfSharpCore 1.0.1 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package HtmlRendererCore.PdfSharpCore 1.0.1 supports: netcoreapp2.0 (.NETCoreApp,Version=v2.0)
HtmlRenderer.Core 1.5.0.5 is not compatible with monoandroid90 (MonoAndroid,Version=v9.0). Package HtmlRenderer.Core 1.5.0.5 supports:
- net20 (.NETFramework,Version=v2.0)
- net30 (.NETFramework,Version=v3.0)
- net35-client (.NETFramework,Version=v3.5,Profile=Client)
- net40-client (.NETFramework,Version=v4.0,Profile=Client)
- net45 (.NETFramework,Version=v4.5)
HtmlRendererCore.PdfSharpCore 1.0.1 is not compatible with monoandroid90 (MonoAndroid,Version=v9.0). Package HtmlRendererCore.PdfSharpCore 1.0.1 supports: netcoreapp2.0 (.NETCoreApp,Version=v2.0)
And I tried with wkhtmltopdf too but it throws similar error in android and other platform projects.
My requirement is to convert the HTML file to PDF file only (no need to view the PDF file, just to save it in local path).
Can anyone please provide suggestions?
Note : Need open source suggestion :)
Awaiting for your suggestions !!!
Support to convert the HTML to PDF in Xamarin Forms
You can read the HTML as a stream and store it into local like below,
public static class FileManager
{
public static async Task<MemoryStream> DownloadFileAsStreamAsync(string url)
{
try
{
var stream = new MemoryStream();
using (var httpClient = new HttpClient())
{
var downloadStream = await httpClient.GetStreamAsync(new Uri(url));
if (downloadStream != null)
{
await downloadStream.CopyToAsync(stream);
}
}
return stream;
}
catch (Exception exception)
{
return null;
}
}
public static async Task<bool> DownloadAndWriteIntoNewFile(string url, string fileName)
{
var stream = await DownloadFileAsStreamAsync(url);
if (stream == null || stream.Length == 0)
return false;
var filePath = GetFilePath(fileName);
if (!File.Exists(filePath))
return false;
File.Delete(filePath);
// Create file.
using (var createdFile = File.Create(filePath))
{
}
// Open and write into file.
using (var openFile = File.Open(filePath, FileMode.Open, FileAccess.ReadWrite))
{
stream.WriteTo(openFile);
}
return true;
}
public static string GetFilePath(string fileName)
{
var filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), fileName);
return filePath;
}
public static void WriteAsText(string filePath, string contents)
{
File.WriteAllText(filePath, contents);
}
public static string ReadAsText(string filePath)
{
return File.ReadAllText(filePath);
}
}
You can read a stored pdf file and displayed using webview like below,
private async void HtmlToPDF()
{
await FileManager.DownloadAndWriteIntoNewFile("https://www.google.co.in/?gws_rd=ssl", "SavePDF.pdf");
var filePath = FileManager.GetFilePath("SavePDF.pdf");
var pdfString = FileManager.ReadAsText(filePath);
var webView = new WebView
{
Source = new HtmlWebViewSource
{
Html = pdfString
}
};
this.Content = webView;
}
And the output below,
Likewise, you can save HTML as PDF and do what you want..
you can use the HtmlToPdfConverter
private void ConvertUrlToPdf()
{
try {
String serverIPAddress = serverIP.Text;
uint serverPortNumber = uint.Parse (serverPort.Text);
// create the HTML to PDF converter object
HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter (serverIPAddress, serverPortNumber);
// set service password if necessary
if (serverPassword.Text.Length > 0)
htmlToPdfConverter.ServicePassword = serverPassword.Text;
// set PDF page size
htmlToPdfConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4;
// set PDF page orientation
htmlToPdfConverter.PdfDocumentOptions.PdfPageOrientation = PdfPageOrientation.Portrait;
// convert the HTML page from given URL to PDF in a buffer
byte[] pdfBytes = htmlToPdfConverter.ConvertUrl (urlToConvert.Text);
string documentsFolder = Environment.GetFolderPath (Environment.SpecialFolder.MyDocuments);
string outPdfFile = System.IO.Path.Combine (documentsFolder, "EvoHtmlToPdf.pdf");
// write the PDF buffer in output file
System.IO.File.WriteAllBytes (outPdfFile, pdfBytes);
// open the PDF document in the default PDF viewer
UIDocumentInteractionController pdfViewer = UIDocumentInteractionController.FromUrl (Foundation.NSUrl.FromFilename (outPdfFile));
pdfViewer.PresentOpenInMenu (this.View.Frame, this.View, true);
} catch (Exception ex) {
UIAlertView alert = new UIAlertView ();
alert.Title = "Error";
alert.AddButton ("OK");
alert.Message = ex.Message;
alert.Show ();
}
}
another
you can see thisurl
[HttpPost("FilePost")]
public async Task<IActionResult> FilePost(List<IFormFile> files)
{
long size = files.Sum(f => f.Length);
var filePath = Directory.GetCurrentDirectory() + "/files";
if (!System.IO.Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
foreach (var item in files)
{
if (item.Length > 0)
{
using (var stream = new FileStream(filePath,FileMode.CreateNew))
{
await item.CopyToAsync(stream);
}
}
}
return Ok(new { count = files.Count, size, filePath });
}
FormFile. FileName = directory + filename,
Uploaded file, file name with path information, how to do?
I just need to get the name of the file.
I just need to get the name of the file.
Use Path.GetFileName() to get the name of the file , and use Path.Combine() to combine the the save path you want with the file name , try the code like below
var filesPath = Directory.GetCurrentDirectory() + "/files";
if (!System.IO.Directory.Exists(filesPath))
{
Directory.CreateDirectory(filesPath);
}
foreach (var item in files)
{
if (item.Length > 0)
{
var fileName = Path.GetFileName(item.FileName);
var filePath = Path.Combine(filesPath, fileName);
using (var stream = new FileStream(filesPath, FileMode.CreateNew))
{
await item.CopyToAsync(stream);
}
}
}
Seem like you want to get the file name base on your file path.
You can get it into way
using System.IO;
Path.GetFileName(filePath);
or extension method
public static string GetFilename(this IFormFile file)
{
return ContentDispositionHeaderValue.Parse(
file.ContentDisposition).FileName.ToString().Trim('"');
}
Please let me know if you need any help
I faced the same issue with different browsers. IE send FileName with full path and Chrome send only the file name. I used Path.GetFileName() to overcome issue.
Other fix is at your front end side. Refer this to solve from it front end side.
I use the code stated here to upload files through a webapi http://bartwullems.blogspot.pe/2013/03/web-api-file-upload-set-filename.html. I also made the following api to list all the files I have :
[HttpPost]
[Route("sharepoint/imageBrowser/listFiles")]
[SharePointContextFilter]
public async Task<HttpResponseMessage> Read()
{
string pathImages = HttpContext.Current.Server.MapPath("~/Content/images");
DirectoryInfo d = new DirectoryInfo(pathImages);//Assuming Test is your Folder
FileInfo[] Files = d.GetFiles(); //Getting Text files
List<object> lst = new List<object>();
foreach (FileInfo f in Files)
{
lst.Add(new
{
name = f.Name,
type = "f",
size = f.Length
});
}
return Request.CreateResponse(HttpStatusCode.OK, lst);
}
When calling this api, all the files uploaded are listed. But when I go to azure I dont see any of them (Content.png is a file I manually uploaded to azure)
Why are the files listed if they dont appear on azure.
According to your description, I suggest you could firstly use azure kudu console to locate the right folder in the azure web portal to see the image file.
Open kudu console:
In the kudu click the debug console and locate the site\wwwroot\yourfilefolder
If you find your file is still doesn't upload successfully, I guess there maybe something wrong with your upload codes. I suggest you could try below codes.
Notice: You need add image folder in the wwwort folder.
{
public class UploadingController : ApiController
{
public async Task<HttpResponseMessage> PostFile()
{
// Check if the request contains multipart/form-data.
if (!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
string root = Environment.GetEnvironmentVariable("HOME").ToString() + "\\site\\wwwroot\\images";
//string root = HttpContext.Current.Server.MapPath("~/images");
var provider = new FilenameMultipartFormDataStreamProvider(root);
try
{
StringBuilder sb = new StringBuilder(); // Holds the response body
// Read the form data and return an async task.
await Request.Content.ReadAsMultipartAsync(provider);
// This illustrates how to get the form data.
foreach (var key in provider.FormData.AllKeys)
{
foreach (var val in provider.FormData.GetValues(key))
{
sb.Append(string.Format("{0}: {1}\n", key, val));
}
}
// This illustrates how to get the file names for uploaded files.
foreach (var file in provider.FileData)
{
FileInfo fileInfo = new FileInfo(file.LocalFileName);
sb.Append(string.Format("Uploaded file: {0} ({1} bytes)\n", fileInfo.Name, fileInfo.Length));
}
return new HttpResponseMessage()
{
Content = new StringContent(sb.ToString())
};
}
catch (System.Exception e)
{
return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
}
}
}
public class FilenameMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
{
public FilenameMultipartFormDataStreamProvider(string path) : base(path)
{
}
public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers)
{
var name = !string.IsNullOrWhiteSpace(headers.ContentDisposition.FileName) ? headers.ContentDisposition.FileName : Guid.NewGuid().ToString();
return name.Replace("\"", string.Empty);
}
}
}
Result:
I am trying to read a file in my Windows 8 Store App. Here is a fragment of code I use to achieve this:
if(file != null)
{
var stream = await file.OpenAsync(FileAccessMode.Read);
var size = stream.Size;
using(var inputStream = stream.GetInputStreamAt(0))
{
DataReader dataReader = new DataReader(inputStream);
uint numbytes = await dataReader.LoadAsync((uint)size);
string text = dataReader.ReadString(numbytes);
}
}
However, an exeption is thrown at line:
string text = dataReader.ReadString(numbytes);
Exeption message:
No mapping for the Unicode character exists in the target multi-byte code page.
How do I get by this?
I managed to read file correctly using similar approach to suggested by duDE:
if(file != null)
{
IBuffer buffer = await FileIO.ReadBufferAsync(file);
DataReader reader = DataReader.FromBuffer(buffer);
byte[] fileContent = new byte[reader.UnconsumedBufferLength];
reader.ReadBytes(fileContent);
string text = Encoding.UTF8.GetString(fileContent, 0, fileContent.Length);
}
Can somebody please elaborate, why my initial approach didn't work?
Try this instead of string text = dataReader.ReadString(numbytes):
dataReader.ReadBytes(stream);
string text = Convert.ToBase64String(stream);
If, like me, this was the top result when search for the same error regarding UWP, see the below:
The code I had which was throwing the error (no mapping for the unicode character exists..):
var storageFile = await Windows.Storage.AccessCache.StorageApplicationPermissions.FutureAccessList.GetFileAsync(fileToken);
using (var stream = await storageFile.OpenAsync(FileAccessMode.Read))
{
using (var dataReader = new DataReader(stream))
{
await dataReader.LoadAsync((uint)stream.Size);
var json = dataReader.ReadString((uint)stream.Size);
return JsonConvert.DeserializeObject<T>(json);
}
}
What I changed it to so that it works correctly
var storageFile = await Windows.Storage.AccessCache.StorageApplicationPermissions.FutureAccessList.GetFileAsync(fileToken);
using (var stream = await storageFile.OpenAsync(FileAccessMode.Read))
{
T data = default(T);
using (StreamReader astream = new StreamReader(stream.AsStreamForRead()))
using (JsonTextReader reader = new JsonTextReader(astream))
{
JsonSerializer serializer = new JsonSerializer();
data = (T)serializer.Deserialize(reader, typeof(T));
}
return data;
}
I currently am able to save a file being uploaded to a WebAPI controller, but I'd like to be able to save the file as a guid with the correct file name extension so it can be viewed correctly.
Code:
[ValidationFilter]
public HttpResponseMessage UploadFile([FromUri]string AdditionalInformation)
{
var task = this.Request.Content.ReadAsStreamAsync();
task.Wait();
using (var requestStream = task.Result)
{
try
{
// how can I get the file extension of the content and append this to the file path below?
using (var fileStream = File.Create(HttpContext.Current.Server.MapPath("~/" + Guid.NewGuid().ToString())))
{
requestStream.CopyTo(fileStream);
}
}
catch (IOException)
{
throw new HttpResponseException(HttpStatusCode.InternalServerError);
}
}
HttpResponseMessage response = new HttpResponseMessage();
response.StatusCode = HttpStatusCode.Created;
return response;
}
I can't seem to get a handle on the actual filename of the content. I thought headers.ContentDisposition.FileName might be a candidate but that doesn't seem to get populated.
Thanks for the comments above which pointed me in the right direction.
To clarify the final solution, I used a MultipartFormDataStreamProvider which streams the file automatically. The code is in another question I posted to a different problem here:
MultipartFormDataStreamProvider and preserving current HttpContext
My full provider code is listed below. The key to generating the guid file name is to override the GetLocalFileName function and use the headers.ContentDisposition property. The provider handles the streaming of the content to file.
public class MyFormDataStreamProvider : MultipartFormDataStreamProvider
{
public MyFormDataStreamProvider (string path)
: base(path)
{ }
public override Stream GetStream(HttpContent parent, HttpContentHeaders headers)
{
// restrict what images can be selected
var extensions = new[] { "png", "gif", "jpg" };
var filename = headers.ContentDisposition.FileName.Replace("\"", string.Empty);
if (filename.IndexOf('.') < 0)
return Stream.Null;
var extension = filename.Split('.').Last();
return extensions.Any(i => i.Equals(extension, StringComparison.InvariantCultureIgnoreCase))
? base.GetStream(parent, headers)
: Stream.Null;
}
public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers)
{
// override the filename which is stored by the provider (by default is bodypart_x)
string oldfileName = headers.ContentDisposition.FileName.Replace("\"", string.Empty);
string newFileName = Guid.NewGuid().ToString() + Path.GetExtension(oldfileName);
return newFileName;
}
}