I have a legacy classic asp application, that allows us to upload pdf files. The file is saved as hex into a MS SQL DB into an image column. Here is a snip of the data in the column:
0x4A564245526930784C6A634E436957317462573144516F784944416762324A7144516F...
We are now working on a rework of the app using node.js as our backend and angular4 as the front end. As part of that, we need to be able to download the same file in the new app. If I upload the same file using angular4 then the image data looks like this:
0x255044462D312E370D0A25B5B5B5B50D0A312030206F626A0D0A3C3C2F547970652F43...
As you can see the hex is completely different and I am not sure what is causing this. I have tried to look at the classic asp code, but its very old and there is no special encoding or such that is happening that would cause this.
In Angular4 we are using the standard input type file control with the change event to capture the contents of the file and then saving it into our db:
myReader.onloadend = (f) => {
let image64;
if (myReader.result.toString()) {
let base64id = ';base64,';
image64 = myReader.result.substr(myReader.result.indexOf(base64id) + base64id.length);
}
someService.upload(image64);
}
So nothing crazy going on, right? The problem now is that I am able to download the file uploaded via angular fine, but not the ones that were uploaded via classic asp. I receive the following error when I try:
Failed to execute 'atob' on 'Window': The string to be decoded is not
correctly encoded.
Here is the code used to upload the files via classic ASP:
Public Function Load()
Dim PosBeg, PosEnd, PosFile, PosBound, boundary, boundaryPos, Pos
Dim Name, Value, FileName, ContentType
Dim UploadControl
PosBeg = 1
PosEnd = InstrB(PosBeg,m_FormRawData,getByteString(chr(13)))
boundary = MidB(m_FormRawData,PosBeg,PosEnd-PosBeg)
boundaryPos = InstrB(1,m_FormRawData,boundary)
'Get all data inside the boundaries
Do until (boundaryPos=InstrB(m_FormRawData,boundary & getByteString("--")))
Set UploadControl = Server.CreateObject("Scripting.Dictionary")
Pos = InstrB(BoundaryPos,m_FormRawData,getByteString("Content-Disposition"))
Pos = InstrB(Pos,m_FormRawData,getByteString("name="))
PosBeg = Pos+6
PosEnd = InstrB(PosBeg,m_FormRawData,getByteString(chr(34)))
Name = getString(MidB(m_FormRawData,PosBeg,PosEnd-PosBeg))
PosFile = InstrB(BoundaryPos,m_FormRawData,getByteString("filename="))
PosBound = InstrB(PosEnd,m_FormRawData,boundary)
If PosFile<>0 AND (PosFile<PosBound) Then
PosBeg = PosFile + 10
PosEnd = InstrB(PosBeg,m_FormRawData,getByteString(chr(34)))
FileName = getString(MidB(m_FormRawData,PosBeg,PosEnd-PosBeg))
UploadControl.Add "FileName", FileName
Pos = InstrB(PosEnd,m_FormRawData,getByteString("Content-Type:"))
PosBeg = Pos+14
PosEnd = InstrB(PosBeg,m_FormRawData,getByteString(chr(13)))
ContentType = getString(MidB(m_FormRawData,PosBeg,PosEnd-PosBeg))
UploadControl.Add "ContentType",ContentType
PosBeg = PosEnd+4
PosEnd = InstrB(PosBeg,m_FormRawData,boundary)-2
Value = MidB(m_FormRawData,PosBeg,PosEnd-PosBeg)
UploadControl.Add "value" , Value
m_dicFileData.Add LCase(name), UploadControl
Else
Pos = InstrB(Pos,m_FormRawData,getByteString(chr(13)))
PosBeg = Pos+4
PosEnd = InstrB(PosBeg,m_FormRawData,boundary)-2
Value = getString(MidB(m_FormRawData,PosBeg,PosEnd-PosBeg))
UploadControl.Add "value" , Value
End If
m_dicForm.Add LCase(name), UploadControl
BoundaryPos=InstrB(BoundaryPos+LenB(boundary),m_FormRawData,boundary)
Loop
Load = m_blnSucceed
End Function
Any idea what I can do here to fix this? I need to be able to download the old files as well. Is there an encoding or something else I am missing here?
After further looking into this, it seems the following is causing the error: Node.js will send a buffer to the front-end. On the front-end I then convert the buffer into base64 using the below code:
_arrayBufferToBase64(buffer) {
let base64 = '';
let bytes = new Uint8Array(buffer);
let len = bytes.byteLength;
for (let i = 0; i < len; i++) {
bbase64 += String.fromCharCode(bytes[i]);
}
return base64;
}
The returned base64 from the old classic asp is returned as garbage and looks like this:
*R{£ÌõGpÃì#j¾é>i¿ê A l Ä ð!!H!u!¡!Î!û"'"U""¯"Ý#
(?(q(¢(Ô))8)k))Ð5*hÏ++6+i++Ñ,,9,n,¢,×-''I'z'«'Ü(
3F33¸3ñ4+4e44Ø55M55Â5ý676r6®6é7$7`77×88P88È99B99¼9ù:6:t
I am still not sure how to fix this though.
Trying to decode base64 and write it to file using groovy
File f = new File("c:\\document1.doc")
PrintWriter writer = null
byte[] b1 = Base64.decodeBase64(info.getdata());
writer = new PrintWriter(f)
writer.print(b1)
writer.close()
This creates a byte[] values like [-121,25,-180....] printed to file.
How to get original data into the file.
You could use a binary stream instead of a Writer:
File f = new File("c:\\document1.doc")
FileOutputStream out = null
byte[] b1 = Base64.decodeBase64(info.getdata());
out = new FileOutputStream(f)
try {
out.write(b1)
} finally {
out.close()
}
But far simpler is to use the Groovy JDK extension File.setBytes:
new File("c:\\document1.doc").bytes = Base64.decodeBase64(info.getdata())
From https://gist.github.com/mujahidk/7fdda0c69d11fc3e4a0907ce4ea77537:
def text = "Going to convert this to Base64 encoding!"
def encoded = text.bytes.encodeBase64().toString()
println encoded
byte[] decoded = encoded.decodeBase64()
println new String(decoded)
I have series of xml files placed in 2 separate folders as below. My objective is to read each file one at a time from both folders and apply xmlunit comaprison methods.
Folder1 : actual1.xml
actual2.xml
actual3.xml
Folder2 : compare1.xml
compare2.xml
compare3.xml
Part1: Am reading each file at a time from both folders by using below script. I welcome suggestions if there are more simpler methods to do this
log.info "**********Read files from Folder1************"
def xml_file1 = []
new File("D:\\GroovyTest\\Folder1").eachFile{ f ->
f (f.isFile()&& f.name.contains('.xml'))
{
def filename = f.name[0..-1]
xml_file1.add(filename)
log.info filename
}
}
if (xml_file1.size() <1)
{
testRunner.fail("No request files found")
}
log.info "**********Read files from Folder2************"
def xml_file2 = []
new File("D:\\GroovyTest\\Folder2").eachFile{ f ->
if (f.isFile()&& f.name.contains('.xml'))
{
def filename = f.name[0..-1]
xml_file2.add(filename)
log.info filename
}
}
if (xml_file2.size() <1)
{
testRunner.fail("No request files found")
}
Part2: Script to perform comparison for each combination of xml files contained in array xml_file1 and xml_file2.
Am actually stuck at this part as the below script works for single files if each xml file is kept in a string, but i have to pass an array as arguments since i have series of xml files to be compared. I get a run time error - groovy.lang.GroovyRuntimeException: Could not find matching constructor for: java.io.FileInputStream(java.util.ArrayList) error at line: 60
InputStream xml_stream1 = new FileInputStream(xml_file1)
String xml1 = getStringFromInputStream(xml_stream1)
InputStream xml_stream2 = new FileInputStream(xml_file2)
String xml2 = getStringFromInputStream(xml_stream2)
def factory = TransformerFactory.newInstance()
def transformer = factory.newTransformer(new StreamSource(new StringReader(xslt)))
StreamResult result_xml1 = new StreamResult(new StringWriter());
transformer.transform(new StreamSource(new StringReader(xml1)), result_xml1)
xml1 = result_xml1.getWriter().toString()
StreamResult result_xml2 = new StreamResult(newStringWriter());
transformer.transform(new StreamSource(new StringReader(xml2)), result_xml2)
xml2 = result_xml2.getWriter().toString()
XMLUnit.setIgnoreComments(true)
DifferenceListener differenceListener = newIgnoreTextAndAttributeValuesDifferenceListener();
DetailedDiff myDiff = new DetailedDiff(new Diff(xml1, xml2));
myDiff.overrideDifferenceListener(differenceListener);
myDiff.overrideElementQualifier(new RecursiveElementNameAndTextQualifier());
log.info "similar ? " + myDiff.similar()
log.info "identical ? " + myDiff.identical()
List allDifferences = myDiff.getAllDifferences();
for (Object object : allDifferences) {
Difference difference = (Difference)object;
log.info(difference);
}
Could someone also help me with methods to ignore empty tags during comparison?
Thanks
I need to display the average file size in MB of given directory.
I started coding like this
string filePath = #"DesiredFilePath";
var getFiles = Directory.GetFiles(filePath);
var length = getFiles.Select(f => new FileInfo(f).Length);
how to extend the code to find average file size?
You are almost near.
Try this
string filePath = #"DesiredFilePath";
var getFiles = Directory.GetFiles(filePath);
var avg = getFiles.Select(f =>
new FileInfo(f).Length).Average();
Console.WriteLine("The Average file size in {0} directory is {1} MB",
filePath,Math.Round(avg/1048576,1));
You could use the Average extension method:
// using System.Linq;
string filePath = #"DesiredFilePath";
double averageFileSize = Directory
.EnumerateFiles(filePath)
.Average(x => new FileInfo(x).Length);
It think this is the shortest way (less code) to do it:
string filePath = "My Path";
double averageBytes = new DirectoryInfo(filePath)
.EnumerateFiles()
.Average(file => file.Length);
double averageMb = averageBytes / 1048576.0;
My code is not working and not giving any exception:
OutputConnection con = (OutputConnection) Connector.open("file:///epsd/rescuer.txt", Connector.WRITE);
System.out.println("below con");
OutputStream out = con.openOutputStream();
PrintStream ps = new PrintStream(out);
System.out.println("below ps");
ps.println(name+"!"+no+"!"+"!"+mtype+"!#!");
System.out.println("below println");
ps.close();
con.close();
Control doesn't reach after OutputConnection line. Is this how to append data to a text file in J2ME?
Use the following to get the SDCard path and concat it with your file name
String memoryCardPath = System.getProperty("fileconn.dir.memorycard");
String filePath = memoryCardPath + "/rescuer.txt";
OutputConnection con = (OutputConnection) Connector.open(filePath, Connector.WRITE);