I can download pdf file from AWS, download is working fine but I need get byte before download.
String awsBucket = params.awsBucket
String awsKey = params.awsKey
String fileName = params.fileName
String pdfLink = params.pdfLink
File file = grailsApplication.mainContext.getResource('WSCredential.properties').file
FileInputStream fileInputStream = new FileInputStream(file)
AmazonS3 s3Client = new AmazonS3Client(new PropertiesCredentials(fileInputStream))
GetObjectRequest getObjectRequest = new GetObjectRequest(awsBucket, awsKey)
userReceipt = s3Client.getObject(getObjectRequest)
if (userReceipt)
{
response.setContentType("application/image/png")
response.setHeader("Content-disposition", "attachment;filename=\"${fileName}\"")
response.outputStream << userReceipt.getObjectContent()
}
If you mean the size of PDF, then you can use HeadObject.
Related
Currently I'm having issues sending a mp4 video file over put request to a presigned AWS url. We have it generated but when I send the video, its just a 32kb file that doesn't play.
My current code is as follows:
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("PUT");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Cache-Control", "no-cache");
connection.setRequestProperty("Content-Type", "video/mp4");
DataOutputStream request = new DataOutputStream(connection.getOutputStream());
byte[] buffer = new byte[BUFFER_SIZE];
InputStream inputStream = new BufferedInputStream(new FileInputStream(file));
while (inputStream.read(buffer) != -1) {
request.write(buffer);
}
I get OK - 200 Response Code but I think my video file is being messed up somehow?
What am I doing wrong?
This streaming code is incorrect:
byte[] buffer = new byte[BUFFER_SIZE];
InputStream inputStream = ...;
while (inputStream.read(buffer) != -1) {
request.write(buffer);
}
It should be more like this:
int length;
byte[] buffer = new byte[BUFFER_SIZE];
InputStream inputStream = ...;
while ((length = inputStream.read(buffer)) != -1) {
request.write(buffer, 0, length);
}
I am trying to display a PDF file in a browser using the action below.
When this is executed the result is an entire screen that looks like the image attached. Rendered result
It looks like MediaTypeNames.Application.Pdf is being ignored.
The same result with Chrome or Firfox.
What I am missing?
[HttpGet]
public FileResult ViewFile()
{
Response.AppendHeader("Content-Disposition", "inline; filename=" + Server.UrlEncode("file.pdf") + ";");
var path = #"C:\temp\file.pdf";
FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read);
return new FileStreamResult(stream, MediaTypeNames.Application.Pdf);
}
You can use below below code snippet to display a PDF document in browser.
FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
fileStream.Position = 0;
return new FileStreamResult(fileStream, System.Net.Mime.MediaTypeNames.Application.Pdf);
I want to create power-point presentation using power-point-template(which may be already exists or may be generated by poi.) for creating power point template file which have a background image in the slides, I write the following code which creates template file which opens in open-office but giving error to opening in Microsoft-power-point.
The Code is
private static void generatePOTX() throws IOException, FileNotFoundException {
String imgPathStr = System.getProperty("user.dir") + "/src/resources/images/TestSameChnl_001_t.jpeg";
File imgFile = new File(imgPathStr);
File potxFile = new File(System.getProperty("user.dir") + "/src/resources/Examples/layout.potx");
FileOutputStream out = new FileOutputStream(potxFile);
HSLFSlideShow ppt = new HSLFSlideShow();
HSLFSlide slide = ppt.createSlide();
slide.setFollowMasterBackground(false);
HSLFFill fill = slide.getBackground().getFill();
HSLFPictureData pd = ppt.addPicture(imgFile, PictureData.PictureType.JPEG);
fill.setFillType(HSLFFill.FILL_PICTURE);
fill.setPictureData(pd);
ppt.write(out);
out.close();
}
After that I tried to create a PPT file using the generated POTX file but
But it's giving error. I am trying bellow code for this.
And the code is
private static void GeneratePPTXUsingPOTX() throws FileNotFoundException, IOException {
File imgFile = new File(System.getProperty("user.dir")+"/src/resources/images/TestSameChnl_001_t.jpeg");
File potx_File = new File(System.getProperty("user.dir") + "/src/resources/Examples/layout.potx" );
File pptx_File = new File(System.getProperty("user.dir") + "/src/resources/Examples/PPTWithTemplate.pptx" );
File movieFile = new File(System.getProperty("user.dir") + "/src/resources/movie/Dummy.mp4");
FileInputStream ins = new FileInputStream(potx_File);
FileOutputStream out = new FileOutputStream(pptx_File);
HSLFSlideShow ppt = new HSLFSlideShow(ins);
List<HSLFSlide> slideList = ppt.getSlides();
int movieIdx = ppt.addMovie(movieFile.getAbsolutePath(), MovieShape.MOVIE_MPEG);
HSLFPictureData pictureData = ppt.addPicture(imgFile, PictureData.PictureType.JPEG);
MovieShape shape = new MovieShape(movieIdx, pictureData);
shape.setAnchor(new java.awt.Rectangle(300,225,420,280));
slideList.get(0).addShape(shape);
shape.setAutoPlay(true);
ppt.write(out);
out.close();
}
And the exception which is coming is as fallows:
java.lang.NullPointerException
at org.apache.poi.hslf.usermodel.HSLFPictureShape.afterInsert(HSLFPictureShape.java:185)
at org.apache.poi.hslf.usermodel.HSLFSheet.addShape(HSLFSheet.java:189)
I am working on a wgt webapp and would like to upload files to s3 from the browser.
Since my credentials are on the server, I need to create the signature on the server and send it to the client to be able to ulpoad.
here is the code I am using:
-dateStamp is in the right format - yyyyMMdd
-policy is base64 encoded - I double checked that
public static String getSignatureForS3Upload(final String dateStamp, final String policy) {
byte[] signingKey = null;
byte[] signature = null;
String strSignature = null;
try {
signingKey = AwsUtill.getSignatureKey(AppConfig.getS3SecretKey(), dateStamp,
AppConfigShared.getMyAwsS3RegionName(), "s3");
signature = HmacSHA256(policy, signingKey);
strSignature = bytesToHex(signature);
}
catch (Exception e) {
// log
}
ServerDBLogger.log(Level.INFO, byteArrayToHex(signature));
ServerDBLogger.log(Level.INFO, bytesToHex(signature));
return strSignature;
private static byte[] HmacSHA256(final String data, final byte[] key) throws Exception {
String algorithm = "HmacSHA256";
Mac mac = Mac.getInstance(algorithm);
mac.init(new SecretKeySpec(key, algorithm));
return mac.doFinal(data.getBytes("UTF-8"));
}
private static byte[] getSignatureKey(final String key, final String dateStamp, final String regionName,
final String serviceName) throws Exception {
byte[] kSecret = ("AWS4" + key).getBytes("UTF-8");
byte[] kDate = HmacSHA256(dateStamp, kSecret);
byte[] kRegion = HmacSHA256(regionName, kDate);
byte[] kService = HmacSHA256(serviceName, kRegion);
byte[] kSigning = HmacSHA256("aws4_request", kService);
return kSigning;
}
final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(final byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
With the genarated signature I get an error message:
The request signature we calculated does not match the signature you provided. Check your key and signing method.
What am I doing wrong?
Is there any good tutorial or sample code to do this?
Thank you!
There have been changes to the AWS signature process - the version at this time (May 2016) is AWS Signature version 4 (http://docs.aws.amazon.com/general/latest/gr/signature-version-4.html). You need to be careful when looking at examples and Stackoverflow etc that the information relates to the same signature version you are using as they don't mix well.
I started using the AWS SDK for an angular/node file upload but eventually found it easier to generate the policy on the server (node.js) side without the SDK. There is a good example (albeit node based which may not be what you are looking for) here: https://github.com/danialfarid/ng-file-upload/wiki/Direct-S3-upload-and-Node-signing-example (but note the issue with the S3 bucket name here: AngularJs Image upload to S3 ).
One key thing to watch is that you correctly include the file content type in the policy generation and that this content type properly matches the content type of the file you are actually uploading.
I am trying to use Aspose.PDF to load PDF from databases, convert it to HTML and render them to our web page.I want to know if we can save both the document and the resource to stream since current example in the document of Aspose.PDF saves css and images to a local path. I have tried this but the is and error that Aspose.Pdf.SaveFormat.Html is not supported.
Aspose.Pdf.Document PDFDocument = new Aspose.Pdf.Document(PDFStream);
MemoryStream HTMLStreamFromPDF = new MemoryStream();
PDFDocument.Save(HTMLStreamFromPDF, Aspose.Pdf.SaveFormat.Html);
If it can be done, how to write the parameters of CustomResourceSavingStrategy, CustomCssSavingStrategy, and CustomStrategyOfCssUrlCreation of HtmlSaveOptions. I am sorry that I am not quite familiar with delegate in C#
Thanks!
Finally found a way to save all files to stream.
MemoryStream HTMLStreamFromPDF = new MemoryStream();
List<MemoryStream> ResourseStreamList = new List<MemoryStream>();
List<string> ResourceNameList = new List<string>();
MemoryStream CSSStream = new MemoryStream();
Aspose.Pdf.HtmlSaveOptions saveOptions = new Aspose.Pdf.HtmlSaveOptions();
CustomResourcesProcessingBind customResourcesProcessingBind = new CustomResourcesProcessingBind((_1) => CustomResourcesProcessing(ResourseStreamList,ResourceNameList, RequestURL, _1));
saveOptions.CustomResourceSavingStrategy = new Aspose.Pdf.HtmlSaveOptions.ResourceSavingStrategy(customResourcesProcessingBind);
CssUrlCreationCustomStrategyBind cssUrlCreationCustomStrategyBind = new CssUrlCreationCustomStrategyBind((_1) => CssUrlCreationCustomStrategy(RequestURL, _1));
saveOptions.CustomStrategyOfCssUrlCreation = new Aspose.Pdf.HtmlSaveOptions.CssUrlMakingStrategy(cssUrlCreationCustomStrategyBind);
CustomCssSavingProcessingBind customCssSavingProcessingBind = new CustomCssSavingProcessingBind((_1) => CustomCssSavingProcessing(CSSStream, _1));
saveOptions.CustomCssSavingStrategy = new Aspose.Pdf.HtmlSaveOptions.CssSavingStrategy(customCssSavingProcessingBind);
saveOptions.HtmlMarkupGenerationMode = Aspose.Pdf.HtmlSaveOptions.HtmlMarkupGenerationModes.WriteOnlyBodyContent;
PDFDocument.Save(HTMLStreamFromPDF, saveOptions);
private delegate string CustomResourcesProcessingBind(Aspose.Pdf.SaveOptions.ResourceSavingInfo resourceSavingInfo);
private static string CustomResourcesProcessing(List<MemoryStream> ResourseStreamList, List<string> ResourceNameList, string RequestURL, Aspose.Pdf.SaveOptions.ResourceSavingInfo resourceSavingInfo)
{
MemoryStream newResource = new MemoryStream();
resourceSavingInfo.ContentStream.CopyTo(newResource);
ResourceNameList.Add(resourceSavingInfo.SupposedFileName);
ResourseStreamList.Add(newResource);
string urlThatWillBeUsedInHtml = RequestURL +"/"+ Path.GetFileName(resourceSavingInfo.SupposedFileName);
return urlThatWillBeUsedInHtml;
}
private delegate string CssUrlCreationCustomStrategyBind(Aspose.Pdf.HtmlSaveOptions.CssUrlRequestInfo requestInfo);
private static string CssUrlCreationCustomStrategy(string RequestURL,Aspose.Pdf.HtmlSaveOptions.CssUrlRequestInfo requestInfo)
{
return RequestURL + "/css_style.css";
}
private delegate void CustomCssSavingProcessingBind(Aspose.Pdf.HtmlSaveOptions.CssSavingInfo resourceInfo);
private static void CustomCssSavingProcessing(MemoryStream CSSStream, Aspose.Pdf.HtmlSaveOptions.CssSavingInfo resourceInfo)
{
resourceInfo.ContentStream.CopyTo(CSSStream);
}
Check the following sample code regarding how to use parameters CustomResourceSavingStrategy, CustomCssSavingStrategy and CustomStrategyOfCssUrlCreation of HtmlSaveOptions when converting from PDF to HTML.
static string _folderForReferencedResources;
static void Main(string[] args)
{
Document pdfDocument = new Document(#"F:\ExternalTestsData\input.pdf");
string outHtmlFile = #"F:\ExternalTestsData\output.html";
_folderForReferencedResources = #"F:\ExternalTestsData\resources\";
//-----------------------------------------------------
// 2)clean results if they already present
//-----------------------------------------------------
if (Directory.Exists(_folderForReferencedResources))
{
Directory.Delete(_folderForReferencedResources, true);
}
File.Delete(outHtmlFile);
//-----------------------------------------------------
// create HtmlSaveOption with tested feature
//-----------------------------------------------------
HtmlSaveOptions saveOptions = new HtmlSaveOptions();
saveOptions.CustomResourceSavingStrategy = new HtmlSaveOptions.ResourceSavingStrategy(Strategy_11_CUSTOM_SAVE_OF_FONTS_AND_IMAGES);
saveOptions.CustomCssSavingStrategy = new HtmlSaveOptions.CssSavingStrategy(Strategy_11_CSS_WriteCssToPredefinedFolder);
saveOptions.CustomStrategyOfCssUrlCreation = new HtmlSaveOptions.CssUrlMakingStrategy(Strategy_11_CSS_ReturnResultPathInPredefinedTestFolder);
using (Stream outStream = File.OpenWrite(outHtmlFile))
{
pdfDocument.Save(outStream, saveOptions);
}
}
private static void Strategy_11_CSS_WriteCssToPredefinedFolder(HtmlSaveOptions.CssSavingInfo resourceInfo)
{
if (!Directory.Exists(_folderForReferencedResources))
{
Directory.CreateDirectory(_folderForReferencedResources);
}
string path = _folderForReferencedResources + Path.GetFileName(resourceInfo.SupposedURL);
System.IO.BinaryReader reader = new BinaryReader(resourceInfo.ContentStream);
System.IO.File.WriteAllBytes(path, reader.ReadBytes((int)resourceInfo.ContentStream.Length));
}
private static string Strategy_11_CSS_ReturnResultPathInPredefinedTestFolder(HtmlSaveOptions.CssUrlRequestInfo requestInfo)
{
return "file:///" + _folderForReferencedResources.Replace(#"\", "/") + "css_style{0}.css";
}
private static string Strategy_11_CUSTOM_SAVE_OF_FONTS_AND_IMAGES(SaveOptions.ResourceSavingInfo resourceSavingInfo)
{
if (!Directory.Exists(_folderForReferencedResources))
{
Directory.CreateDirectory(_folderForReferencedResources);
}
string path = _folderForReferencedResources + Path.GetFileName(resourceSavingInfo.SupposedFileName);
// first path of this method is for saving of font
System.IO.BinaryReader contentReader = new BinaryReader(resourceSavingInfo.ContentStream);
System.IO.File.WriteAllBytes(path, contentReader.ReadBytes((int)resourceSavingInfo.ContentStream.Length));
string urlThatWillBeUsedInHtml = "file:///" + _folderForReferencedResources.Replace(#"\", "/") + Path.GetFileName(resourceSavingInfo.SupposedFileName);
return urlThatWillBeUsedInHtml;
}
The details are available here.
P.S. I am Social Media Developer at Aspose.