binary-protocol | Create and parse multibyte binary buffers | Parser library
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kandi X-RAY | binary-protocol Summary
Create and parse multibyte binary buffers
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QUESTION
I hope I don't have misunderstood the Thrift concept, but what I see from (example) questions like this, this framework is composed by different modular layers that can be enabled or disabled.
I'm mostly interesed in the "IDL part" of Thrift, so that I can create a common interface between my C++ code and an external Javascript application. I would like to call C++ functions using JS, with Binary data transmission, and I've already used the compiler for this.
But both my C++ (the server) and JS (client) application already exchange data using a C++ Webserver with Websockets support, it is not provided by Thrift.
So I was thinking to setup the following items:
In JS (already done):
- TWebSocketTransport to send data to my "Websocket server" (with host ws://xxx.xxx.xxx.xxx)
- TBinaryProtocol to encapsulate the data (using this JS implementation)
- The compiled Thrift JS library with the correspondent C++ functions to call (done with the JS compiler)
In C++ (partial):
- TBinaryProtocol to encode/decode the data
- A TProcessor with handler to get the data from the client and process it
For now, the client is already able to sent requests to my websocket server, I see receiving them in binary form and I just need Thrift to:
- Decode the input
- Call the appropriate C++ function
- Encode the output
My webserver will send the response to the client. So no "Thrift server" is needed here. I see there is the TProcessor->process() function, I'm trying to use it when I receive the binary data but it needs an in/out TProtocol. No problem here... but in order to create the TBinaryProtocol I also need a TTransport! If no Thrift server is expected... what Transport should I use?
I tried to set TTransport to NULL in TBinaryProtocol constructor, but once I use it it gives nullptr exception.
Code is something like:
Init:
...ANSWER
Answered 2019-Jun-19 at 13:32I've managed to do it using the following components:
QUESTION
I am fairly new to F# but have been reading about workflows and computation expressions. From the reading I have done, I thought I felt I had at least a basic understanding of the purpose of a workflow and the syntax for using a workflow. Then, I came across an example here: BitWorker Workflow.
I tried copying the example code to a local project and ran it successfully. I started moving things around and getting a feel for what the code did, but I am still having trouble understanding how this workflow actually works. I haven't seen other examples where the workflow syntax was like: do bitWriter stream {...
instead of do workflow {...
.
ANSWER
Answered 2019-Feb-01 at 14:19This should be easier to explain if we look at a minimal example that implements a workflow like this. First, I'll define a type for operations that you can do. For simplicity, let's have just one:
QUESTION
Summary: when I use Thrift to serialize map in C++ to disk, and then de-serialize it using Python, I do not get back the same object.
A minimal example to reproduce to the problem is in Github repo https://github.com/brunorijsman/reproduce-thrift-crash
Clone this repo on Ubuntu (tested on 16.04) and follow the instructions at the top of the file reproduce.sh
I have the following Thrift model file, which (as you can see) contains a map indexed by a struct:
...ANSWER
Answered 2018-Dec-05 at 14:12Sadly C++ TFileTransport is not totally portable and will not work with Python's TFileObjectTransport. If you switch to C++ TSimpleFileTransport it will work as expected, with Python TFileObjectTransport and with Java TSimpleFileTransport.
Take a look at the examples here:
https://github.com/RandyAbernethy/ThriftBook/tree/master/part2/types/complex
They do pretty much exactly what you are attempting in Java and Python and you can find examples with C++, Java and Python here (though they add a zip compression layer):
https://github.com/RandyAbernethy/ThriftBook/tree/master/part2/types/zip
Another caution however would be against the use of complex key types. Complex key types require (as you discovered) comparators but will flat out not work with some languages. I might suggest, for example:
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