My flutter web app creates files (csv and pdf) that should be downloaded on user click. It works fine on PC Chrome but fails on Android Chrome. No downloaded file is shown and a file named ".com.google.Chrome.xxxxxx" is stored (where the suffix is random).
Here is my code:
import 'dart:html' as html;
void saveFile(String name, dynamic data, String type) {
final blob = html.Blob([data], type);
html.AnchorElement(href: html.Url.createObjectUrlFromBlob(blob))
..download = name
..click();
}
I pass either the result of pdf.save() or the csv String into the data parameter.
I also tried this and it works perfectly on the same android Chrome (but I can't set the file name in this case and the automatically generated file name looks awful):
import 'dart:html' as html;
void saveFile(String name, dynamic data, String type) {
final blob = html.Blob([data], type);
html.window.open(html.Url.createObjectUrlFromBlob(blob), '_blank');
}
Any suggestions how to fix this?
Related
I'm trying to upload/delete image to/from aws s3 bucket using spring boot.
public class AmazonClient {
private AmazonS3 s3client;
private void initializeAmazon() {
AWSCredentials credentials = new BasicAWSCredentials(this.accessKey, this.secretKey);
this.s3client = AmazonS3ClientBuilder.standard().withRegion(region).withCredentials(new AWSStaticCredentialsProvider(credentials)).build();
}
private void uploadFileTos3bucket(String fileName, File file) {
s3client.putObject(new PutObjectRequest(bucketName, fileName, file)
.withCannedAcl(CannedAccessControlList.PublicRead));
}
public void deleteFileFromS3Bucket(String fileUrl) {
String fileName = fileUrl.substring(fileUrl.lastIndexOf("/") + 1);
s3client.deleteObject(new DeleteObjectRequest(bucketName + "/", fileName));
}
}
The upload function works well, I can see the file has been uploaded to the s3 bucket, but the delete function seems malfunctioning, I get a successful message but the file is still in the bucket.
Thanks in advance if anyone could help me to figure out the problem.
From the javadoc of deleteObject (emphasis mine)
Deletes the specified object in the specified bucket. Once deleted, the object can only be restored if versioning was enabled when the object was deleted.
If attempting to delete an object that does not exist, Amazon S3 will return a success message instead of an error message.
So, most probably the path (fileName) you construct in deleteFileFromS3Bucket does not point to an S3 object.
EDIT
I'm updating my answer based on the comments:
The file name used has special characters (: in the provided example) which gets URL encoded (percent encoded). This encoded URL cannot be used to retrieve or delete the S3 object as the percent in the URL would get encoded again(% gets encoded to %25).
The encoded URL has to be decoded. One way is to use java.net.URLDecoder
URLDecoder.decode(encodedPath, "UTF-8")
public boolean deleteFileFromS3Bucket(String fileUrl) {
String fileName = fileUrl.substring(fileUrl.lastIndexOf("/") + 1);
try {
DeleteObjectsRequest delObjReq = new DeleteObjectsRequest(bucketName).withKeys(fileName);
s3client.deleteObjects(delObjReq);
return true;
} catch (SdkClientException s) {
return false;
}
}
For me, working here is an option.
Just found out that I added an additional slash in new DeleteObjectRequest.
The only thing that worked for me is deleting it through Cyberduck (I neither work for nor am promoting Cyberduck, I genuinely used it and it worked). Here are the steps of what I did:
Download and install Cyberduck.
Click on Open Connection
Select Amazon S3 from the dropdown (default would be FTP)
Enter your access key ID and secret Access key (if you don't have one then you need to create one on your s3 bucket through IAM on AWS).
You will see a list your S3 buckets. Select the file or folder or bucket you want to delete, right click and delete. Even files with 0kb show up here and can be deleted.
I have some code that saves an xml file to the file system.
public static void Save(T obj, string FileName)
{
if (Application.Current.HasElevatedPermissions)
{
string myDocuments = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
string path = System.IO.Path.Combine(myDocuments, FileName);
using (var writer = new StreamWriter(path))
{
var serializer = new XmlSerializer(typeof(T));
serializer.Serialize(writer, obj);
writer.Flush();
}
}
else
{
throw new Exception("Cannot Save File. Application Requires Elevated permissions.");
}
}
While debugging using Internet Explorer 10 the file is not saved to the listed path in the path variable "C:\Users\Travis\Documents\Save.xml"
I call load with the exact same path "C:\Users\Travis\Documents\Save.xml" and the file loads correctly but the file still does not exist at the listed location.
I searched the file system with no results for Save.xml but it has to exist since it is able to load after application exit.
If I access the same page using Chrome the file is created successfully at the location.
I am wondering where Internet Explorer saves the file?
I found that if I uncheck "Enable Protected Mode" in IE's Security tab then the file is created in the location as expected.
I am having some trouble with a asp.net MVC3 web application that I am developing. I need an upload page which Allows the user to upload excel files and dump them to the file system. I got this to work fine. The next part is the part that I am having trouble with, After I upload the excel files I need to programmatically kick off a SSIS package which I have created already to import the excel files.
Here is what I have so far in code:
//
// POST: /Home/Update/
[HttpPost]
public ActionResult Update(HttpPostedFileBase file)
{
// Verify that the user selected a file
if (file != null && file.ContentLength > 0)
{
var fileName = Path.GetFileName(file.FileName);
// store the file inside ~/App_Data/uploads folder
var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
ViewBag.Message = "File Uploaded Successfully";
file.SaveAs(path);
}
//Start the SSIS here
try
{
Application app = new Application();
Package package = null;
package = app.LoadPackage( #"C:\Users\Chris\Documents\Visual Studio
2008\Projects\Integration Services Project1\Integration Services Project1
\bin\Package.dtsx", null);
// Execute Package
DTSExecResult results = package.Execute();
if(results == DTSExecResult.Failure)
{
foreach(DtsError local_DtsError in package.Errors)
{
ViewBag.Message("Package Execution results:{0}",
local_DtsError.Description.ToString());
}
}
}
catch(DtsException ex)
{
//ViewBag.Message("{0} Exception caught.", ex);
}
// redirect back to the index action to show the form once again
return RedirectToAction("Update");
}
When I run the code and upload an excel file I get a DtsException caught, which says:
Failed to open package file "C:\Users\Chris\Documents\Visual Studio 2008\Projects\Integration Services Project1\Integration Services Project1\bin\Package.dtsx" due to error 0x80070003 "The system cannot find the path specified.". This happens when loading a package and the file cannot be opened or loaded correctly into the XML document. This can be the result of either providing an incorrect file name was specified when calling LoadPackage or the XML file was specified and has an incorrect format.
I don't understand why it is giving me this because the file path is right I checked and it is exactly correct. I need some help fixing this issue I would greatly appreciate any help you guys can give.
Permissions I should think. Put the file somewhere where account running IIS can see it. Whereever you were planning on deploying it, would be good.
We download a file from our CdN and then return a url to that downloaded file to the user. I'm trying to get this implemented so that when a user clicks the download buttton, it goes and test that url to that downloaded file then forces a save prompt based on that local url.
So for example if there is a button called download on the page for a specific .pdf, we ultimately have code in our controller going to the cdn and downloading the file, zipping it then returning a url such as: http://www.ourLocalAssetServer.com/assets/20120331002728.zip
I'm not sure if you you can use the File() method to return the resource to the user as to cause a save prompt when you have a url to the file, not a system directory virtual path.
So how can I get this working with the url? I need the download button to ultimately force a save prompt on their end given a url such as what is generated per this example above? Not I am using POST, not a GET, so not sure which I should use in this case either besides this not working overall to force a save prompt. It is hitting my GetFileDownloadUrl but ultimately errors saying it's not a virtual path.
Here's my code:
#foreach (CarFileContent fileContent in ModelCarFiles)
{
using (Html.BeginForm("GetFileDownloadUrl", "Car", FormMethod.Get, new { carId = Model.CarId, userId = Model.UserId, #fileCdnUrl = fileContent.CdnUrl }))
{
#Html.Hidden("userId", Model.UserId);
#Html.Hidden("carId", Model.CarId);
#Html.Hidden("fileCdnUrl", fileContent.CdnUrl);
<p><input type="submit" name="SubmitCommand" value="download" /> #fileContent.Name</p>
}
}
public ActionResult GetFileDownloadUrl(string fileCdnUrl, int carId, int userId)
{
string downloadUrl = string.Empty;
// take the passed Cdn Url and go and download that file to one of our other servers so the user can download that .zip file
downloadUrl = GetFileZipDownloadUrl(carId, userId, fileCdnUrl;
// now we have that url to the downloaded zip file e.g. http://www.ourLocalAssetServer.com/assets/20120331002728.zip
int i = downloadUrl.LastIndexOf("/");
string fileName = downloadUrl.Substring(i);
return File(downloadUrl, "application/zip", fileName);
}
error: not a valid virtual path
This won't work except the zip file is in your virtual path.
The File method you have used here File(string, string, string) expects a fileName which will be used to create a FilePathResult.
Another option would be to download it (using WebClient.DownloadData or DownloadFile methods) and passing either the byte array or the file path (depending on which you choose).
var webClient = new Webclient();
byte[] fileData = webClient.DownloadData(downloadUrl);
return File(fileData, "application/zip", fileName);
And the lines where you get the index of "/" just to get the filename is unnecessary as you could have used:
string fileName = System.IO.Path.GetFileName(downloadUrl);
My web application loads a pdf in the browser. I have figured out how to check that the pdf has loaded correctly using:
verifyAttribute
xpath=//embed/#src
{URL of PDF goes here}
It would be really nice to be able to check the contents of the pdf with Selenium - for example verify that some text is present. Is there any way to do this?
While not natively supported, I have found a couple ways using the java driver. One way is to have the pdf open in your browser (having adobe acrobat installed) and then use keyboard shortcut keys to select all text (CTRL+A), then copy it to the clipboard (CTRL+C) and then you can verify the text in the clipboard. eg:
protected String getLastWindow() {
return session().getEval("var windowId; for(var x in selenium.browserbot.openedWindows ){windowId=x;} ");
}
#Test
public void testTextInPDF() {
session().click("link=View PDF");
String popupName = getLastWindow();
session().waitForPopUp(popupName, PAGE_LOAD_TIMEOUT);
session().selectWindow(popupName);
session().windowMaximize();
session().windowFocus();
Thread.sleep(3000);
session().keyDownNative("17"); // Stands for CTRL key
session().keyPressNative("65"); // Stands for A "ascii code for A"
session().keyUpNative("17"); //Releases CTRL key
Thread.sleep(1000);
session().keyDownNative("17"); // Stands for CTRL key
session().keyPressNative("67"); // Stands for C "ascii code for C"
session().keyUpNative("17"); //Releases CTRL key
TextTransfer textTransfer = new TextTransfer();
assertTrue(textTransfer.getClipboardContents().contains("Some text in my pdf"));
}
Another way, still in java, is to download the pdf and then convert the pdf to text with PDFBox, see http://www.prasannatech.net/2009/01/convert-pdf-text-parser-java-api-pdfbox.html for an example on how to do this.
You cannot do this using WebDriver natively. However, PDFBox API can be used here to read content of PDF file. You will have to first of all shift a focus to browser window where PDF file is opened. You can then parse all the content of PDF file and search for the desired text string.
Here is a code to use PDFBox API to search within PDF document.
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import org.pdfbox.cos.COSDocument;
import org.pdfbox.pdfparser.PDFParser;
import org.pdfbox.pdmodel.PDDocument;
import org.pdfbox.util.PDFTextStripper;
public class pdfToTextConverter {
public static void pdfToText(String path_to_PDF_file, String Path_to_output_text_file) throws FileNotFoundException, IOException{
//Parse text from a PDF into a string variable
File f = new File("path_to_PDF_file");
PDFParser parser = new PDFParser(new FileInputStream(f));
parser.parse();
COSDocument cosDoc = parser.getDocument();
PDDocument pdDoc = new PDDocument(cosDoc);
PDFTextStripper pdfStripper = new PDFTextStripper();
String parsedText = pdfStripper.getText(pdDoc);
System.out.println(parsedText);
//Write parsed text into a file
PrintWriter pw = new PrintWriter("Path_to_output_text_file");
pw.print(parsedText);
pw.close();
}
}
JAR Source
http://sourceforge.net/projects/pdfbox/files/latest/download?source=files
Unfortunately you can not do this at all with Selenium
There is a way.
Before you click the link you can obtain the href value
element.FindElement(By.TagName("href")).Text
Then after the PDF loads you can get the Url
driver.GetUrl();
Then you can just check to see if the url contains the href.
It's not the best, but it's better than nothing.