I am trying to read a data from a chunk and converting it to byte array at gateway layer of application.
Now this chunk data is POST method with form-data , that consists of 2 parameters , a JSON string.
and Multipart data that is an image.
So , the purpose of me try to read the data that is being pushed as chunk encoding for manipulating this JSON string and appending a extra key:value to it (example : attaching log id to it)
Now the problem is once i convert the data from chunk to a byte array.
then i'm unable to create the multipart data with same format.
So is there anyway to fetch the multipart form data with a string paramter and then again reverse the process to once the manipulation is done in java.
Related
I have a JSON payload encoded to Base64 that needs to be stored in a ByteBuffer to be returned.
Upon trying to convert it from Base64 to JSON on base64decode.org I am able to get the proper json but on trying to do the same in code, it just prints out the data but not the {, } or the :
I am using DatatypeConverter.parseBase64Binary to achieve it.
What should I use in the code to return the properly formatted JSON payload?
I am working with the GCS API, attempting to create a survey with image data.
I am using the NuGet package Google.Apis.ConsumerSurveys.v2 version 1.14.0.564 on the .Net platform. I can create surveys that do not contain image data without problem. However, when I try to create a survey with image data I receive an error from the API.
I have on hand base64 encoded png format image data. My images display properly in an IMG tag on a web page when the src attribute is set to
'data:image/png;base64,<image base64 string>'
I want to send this image data to the API to populate the survey image. My understanding is that I need to set the Data property of the Google.Apis.ConsumerSurveys.v2.Data.SurveyQuestionImage object to a string containing the image data. I have not been successful.
I first decode my base64 string to a byte array:
byte[] bytes = Convert.FromBase64String(<image base64 string>);
I have tried setting the Data property in the SurveyQuestionImage object as:
image.Data = Encoding.Unicode.GetString(bytes);
This results in this error from the API:
Google.Apis.Requests.RequestError Invalid value for ByteString: <the Data string>
I have also tried converting the byte array to a hexadecimal encoded string as:
StringBuilder sb = new StringBuilder(bytes.Length);
foreach (Byte b in bytes)
{
sb.Append(b.ToString("X2"));
}
image.Data = sb.ToString();
This results in the more hopeful error:
Google.Apis.Requests.RequestError Invalid Value supplied to API: image_data was bad. Request Id: 579665c300ff05e6c316a09e600001737e3430322d747269616c320001707573682d30372d32322d72313000010112 [400] Errors [ Message[Invalid Value supplied to API: image_data was bad. Request Id: 579665c300ff05e6c316a09e600001737e3430322d747269616c320001707573682d30372d32322d72313000010112] Location[ - ] Reason[INVALID_VALUE] Domain[global] ]
Does anyone know the correct format for the Data property of the Google.Apis.ConsumerSurveys.v2.Data.SurveyQuestionImage object?
The data needs to be base64 encoded and also "urlsafe" or "websafe" depending on what language you are using. (python and java, respectively)
In other words, you'll need to first base64 encode then:
Web safe encoding uses '-' instead of '+', '_' instead of '/'
Hope this helps!
For c# users, check out this technique for making websafe b64:
How to achieve Base64 URL safe encoding in C#?
For .net users, look at the comments in this question:
Converting string to web-safe Base64 format
And also this link for more info about .net specific options for encoding:
http://www.codeproject.com/Tips/76650/Base-base-url-base-url-and-z-base-encoding
And to specifically answer the original poster, try this for converting your byte array to a string.
public static string ToBase64ForUrlString(byte[] input)
{
StringBuilder result = new StringBuilder(Convert.ToBase64String(input).TrimEnd('='));
result.Replace('+', '-');
result.Replace('/', '_');
return result.ToString();
}
I have to upload a file attachment and send it via an HTTP GET request to a server location. I am using IBM websphere integration designer to implement this functionality.
I have the attachment as a byte array and it has to be converted to an Excel .csv file.
Please help me understand how to write a .csv file using a byte array.
If you have a byte array. Let's say.
byte[] byteArray = ThisIsWhereMyByteArrayIsComingFrom.getArray();
String convertedString = new String(byteArray);
That gets the string value of whatever your byte array is. Then you can either, use a csv library to output whatever it is to a file.
Is there a possibility to send a json text with binary data?
I'am calling it multipart/form-data cause in the html form we can send text with a binary file, how to do the same with the websockets, is that possible?
so here is an example:
var arrayBuffer = new ArrayBuffer();
// lets say here we fill our array buffer with binary data in the browser
// so here we got 2 ways
// 1) First we can send the json text indicating that the next request will be a binary data file
// so using this way the next request will have ready an Id for the uploaded file if we are working
// with database
var obj = {};
obj.somedata = "hello This is a name for my item";
websocket.send(JSON.stringify(obj)); //first sending the text
websocket.send(arrayBuffer); //sending the binary data file
// 2) Second, This is the way I prefer most, but I don't know if this is possible
// we send a json object
var obj = {};
obj.somedata = "hello This is a name for my item";
obj.file = arrayBuffer;
websocket.send(JSON.stringify(obj));
but the problem is that I can't put a binary data into a text json, the binary data gets corrupted this way, in the server side I'am using java... cause using 2 requests for sending a file and the input text data is not a good way I think, any hints?
If server cannot handle binary data (which is maybe problem with configuration or your program, I'm sending binary data this way without no problem), then you can encode your data in base64 or escape them into json. But the best way would be repairing server side...
If you wanna use base64 way, look at this: https://github.com/niklasvh/base64-arraybuffer, and for example this: Base64 Encoding in Java
I am streaming an image to Magento, and encoding an image using android.util.Base64 using either of:
Base64.encodeToString(content, Base64.CRLF)
Base64.encodeToString(content, Base64.DEFAULT)
But I always receive fault:
The image contents is not valid base64 data
Working: I found that the data had to be encoded twice, one time using
Base64 and another encoding using custom Library
Try removing data node from your base64 code for image.
e.g. if you have data like data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAVQAAABXCAYAA...
then remove data node. It should look like below and pass it to Magento.
iVBORw0KGgoAAAANSUhEUgAAAVQAAABXCAYAA...