I have a c# code:
while (true) {
String s = portR.ReadLine();
byteArray = Encoding.ASCII.GetBytes(s);
File.WriteAllBytes("byte.txt", byteArray);
Console.WriteLine(s);
}
it reads from a serial port where a simulator/machine is sending data in certain encoded form( unknown to me). When I read the data it is not ASCII format in console or the file where i saved.
Its like:
??,y? ??????`??H#???5??? ?? ?? ?I0???????(? ??????#?????/??/???????*??????5 ??????]?
What to do? I want to read it in ASCII format. please help
Related
I'm using sendgrid to send mails with attachments. But seems like excel file is corrupted in the mail. This is the code I'm using
byte[] byteData = System.Text.Encoding.ASCII.GetBytes(File.ReadAllText(#"fullpath\test.xlsx"));
msg.Attachments = new List<SendGrid.Helpers.Mail.Attachment>
{
new SendGrid.Helpers.Mail.Attachment
{
Content = Convert.ToBase64String(byteData),
Filename = "test.xlsx",
Type = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
Disposition = "attachment"
}
};
On opening of excel file, I'm getting a popup "We found a problem with content...If you trust click "Yes". On Yes, Excel cannot open this file. Can anyone please help me on this
#Sendgrid
Twilio SendGrid developer evangelist here.
I think the issue may be that you are getting the byte data by reading the file as text and then converting that text to bytes through the lens of ASCII encoding. It may work better to just read the file as bytes initially.
Try:
byte[] byteData = File.ReadAllBytes(#"fullpath\test.xlsx");
msg.Attachments = new List<SendGrid.Helpers.Mail.Attachment>
{
new SendGrid.Helpers.Mail.Attachment
{
Content = Convert.ToBase64String(byteData),
Filename = "test.xlsx",
Type = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
Disposition = "attachment"
}
};
Try below
msg.AddAttachment("test.xlsx"); // Physical file path
Make assure file path is relevant
or You try with Bytes as well,
var bytes = File.ReadAllBytes(filePath);
var file = Convert.ToBase64String(bytes);
msg.AddAttachment("Name.xls", file);
To read a file contents of .txt file I am using
List<String> linesList = await file.readAsLines(encoding: latin1);
return linesList;
Files with Encodng UTF-8 are working perfectly with this above code.
But for Encoding UTF-16LE its returning a list with length double of the lines in the file but are all empty except first line. This first index contains ÿþ#
As package:utf is now abandoned (and therefore will never support null-safety), another way to read a UTF-16LE file as a String is to take advantage of Dart Strings using UTF-16 code units internally. You therefore can read the file, interpret the data as 16-bit (unsigned) integers, and then create a String using those as UTF-16 code units:
Basically:
var f = File("utf-16le.txt");
var bytes = f.readAsBytesSync();
// Note that this assumes that the system's native endianness is the same as
// the file's.
var utf16CodeUnits = bytes.buffer.asUint16List();
var s = String.fromCharCodes(utf16CodeUnits);
I also leave it as an exercise for the reader to deal with potential BOMs at the beginning of the file.
Also see https://github.com/dart-lang/convert/issues/30, which requests that the Dart SDK provide UTF-16 conversion functions.
So the first credit goes to #Richard_Heap , who has commented on the above question. He mentioned a dart package that encodes and decodes UTF formats. I have been able to decode the txt files as expected in my Flutter app using this package.
First I am identifying the utf format type by these functions available from the package mentioned by #Richard_Heap
List<int> bytes = await file.readAsBytes();
hasUtf16beBom(bytes)
hasUtf16Bom(bytes)}
hasUtf16leBom(bytes)
hasUtf32beBom(bytes)
hasUtf32Bom(bytes)
hasUtf32leBom(bytes)
There are different decoder & encoder functions in this package that can be used once the utf format is known using these above functions. Like I used
String decodedString = decodeUtf16le(bytes);
Check out the charset package. It is null-safe and supports both UTF-16BE and UTF-16LE according to documentation.
Usage:
import 'package:charset/charset.dart';
main() {
// default
print(utf16.decode([254, 255, 78, 10, 85, 132, 130, 229, 108, 52]));
print(utf16.encode("上善若水"));
// detect
print(hasUtf16Bom([0xFE, 0xFF, 0x6C, 0x34]));
// advance
Utf16Encoder encoder = utf16.encoder as Utf16Encoder;
print(encoder.encodeUtf16Be("上善若水", false));
print(encoder.encodeUtf16Le("上善若水", true));
}
I have:
Raw xml filled by a select query.This xml transformed into a HL7
message
One of the tags of this xml represents a clob column from a table in
the database
I mapped this data (from edit transformer section) as a variable.
Now I am trying to convert this variable into a base64 string then
replace it in my transformed hl7 message.
5.I tried this conversion on a destination channel which is a javascript writer.
I read and tried several conversion methods like
Packages.org.apache.commons.codec.binary.Base64.encodeBase64String();
I have got only error messages like :
EvaluatorException: Can't find method org.apache.commons.codec.binary.Base64.encodeBase64String(java.lang.String);
Code piece:
var ads=$('V_REPORT_CLOB');
var encoded = Packages.org.apache.commons.codec.binary.Base64.encodeBase64String(ads.toString());
It is pretty clear that I am a newbie on that.How can I manage to do this conversion ?
Here is what I use for Base64 encoding a string with your var substituted.
//Encode Base 64//
var ads = $('V_REPORT_CLOB');
var adsLength = ads.length;
var base64Bytes = [];
for(i = 0; i < adsLength;i++){
base64Bytes.push(ads.charCodeAt(i));
}
var encodedData = FileUtil.encode(base64Bytes);
I am trying to make a JavaScript function with package crypto-js to decode AES (CBC mode).
I input the data in an online decoding tool and it decrypted correctly, so I am sure the following data is correct, but I just can't reproduce it by JavaScript.
Here is the online decrypting (so I'm sure the data, key, iv are correct): http://aes.online-domain-tools.com/link/deb718giF4dUxZylq/
My code with crypto-js#3.1.8:
// data, key, iv are all Hex
var data = "bd6e0a73147a2c224c7c20346d0e9a138b744a5d94463cdff6dbb965055f974f097104399d2c40af2f0ac667f3857e70e9703bf27f6411f7e97c3449e8921f3c98e665914689b4b77b5bbcc8d8bc319e680eb89eedb1c25178923ae57fb3fb476755d6009f1aed88fffcb9b2ed3b4cf6f23d9c4c56da1dde6619e45a8d6f06412853ae1941cf554b6824112a913750a7485ed67fb38b950411310410de998f2597c2fcc81a305b0df369f54b75426176";
var key = 'befce5c6da98837ea421811c832817ae';
var iv = "a884a7edd5d06a48d6da9ad11fd36a75";
// transfer Hex to WordArray
var _data = CryptoJS.enc.Hex.parse(data);
var base64_data = _data.toString(CryptoJS.enc.Base64);
var _key = CryptoJS.enc.Hex.parse(key);
var _iv = CryptoJS.enc.Hex.parse(iv);
decrypted = CryptoJS.AES.decrypt(
base64_data, // pass base64
_key, // pass WordArray
{iv: _iv, // pass WordArray
mode: CryptoJS.mode.CBC,
padding: CryptoJS.pad.ZeroPadding
})
console.log(decrypted.toString(CryptoJS.enc.Utf8));
// out put fail to match Utf8
It output Error: Malformed UTF-8 data
The decoded string should be: (the link is not important)
https://emogo-media-testing.s3.amazonaws.com/1503342403787_blob?AWSAccessKeyId=AKIAI5MUDCK6XYWKGAKA&Expires=1534882403&Signature=t1PFesQuOpOlIMKoOqje%2Bs7I%2Fhg
Any hint is appreciated. Thank you!
I know it has been a while since you asked the question but I will respond just so the next person does not stumble upon an unanswered question.
Your code works fine, it decrypts AES.CBC encrypted data correct, the problem lies with your input data.
Your encrypted data string should have looked like:
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
for this example to work correctly.
The key you used is not a hex string but a text string. Your online example is no longer valid but I figured it out after a couple of tries.
If change the following line:
var _key = CryptoJS.enc.Hex.parse(key);
to:
var _key = CryptoJS.enc.Utf8.parse(key);
Your code example will work fine with your original data string.
When you decrypted the text on http://aes.online-domain-tools.com/ you probably had the plaintext textbox selected instead of hex for your key input.
I have a trouble in received data with chinese-big5 encoded web-page,
and I tried to get some sample code but can not find I need for big5 like below:
if ([encodingName isEqualToString:#"euc-jp"]) {
receivedDataEncoding = NSJapaneseEUCSStringEncoding;
} else {
receivedDataEncoding = NSUTF8StringEncoding};
How to replace the part of "NSJapaneseEUCSStringEncoding" for big5 chinese encoding?
Thanks for answer first.
You can use the kCFStringEncodingBig5_E constant which is available in
CoreFoundation/CFStringEncodingExt.h