How can we call a json RPC 2.0 using Postman along with ,Is there any library for java to call JSON RPC

[Barun Vishwakarma]

How can we call a json RPC 2.0 using Postman along with ,Is there any library for java to call JSON RPC.

Please help me with that.

[Pascal Charbonneau]

JSON RPC endpoints are simple POST so you should be able to do that with Postman.

Just make sure you set your content-type to be 'application/json' and set your POST body accordingly.

{
  "jsonrpc" : "2.0",
  "method" : "GetAllYourRiches",
  "params" : [],
  "id": 1
}

I personally prefer the Advanced Rest Client for its simplicity and beautiful interface.

I have not done java for 15 years, so can't help with that bit.

On Thu, Jun 18, 2020 at 8:54 AM Barun Vishwakarma <barunvishw...@gmail.com> wrote:

How can we call a json RPC 2.0 using Postman along with ,Is there any library for java to call JSON RPC.

Please help me with that.

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[Aigerim Iskakova]

Dear All,

I have urgent question regarding calling jsonrpc. In the react app I would like to use client simple jsonrpc js library to call from the http server. I don't know the syntax. I would like to use the response text in method of the App.class. What can you suggest me? It is extremely important and urgent. Thank you in advance?

чт, 18 июн. 2020 г., 19:52 Pascal Charbonneau <pchar...@gmail.com>:

To view this discussion on the web visit https://groups.google.com/d/msgid/json-rpc/CAKoUUBL3D%3DpL8nrDDHSy8BZojcPrQXPXeCGY05PFn6s5vyOQuw%40mail.gmail.com.

[Pascal Charbonneau]

I suggest reading the JSOn-RPC 2.0 specification first which explains the structure of the messages. You can use any HTTP javascript library like Axios to do the POST yourself and get the response or you can use a more specialized library like Simple-jsonrpc-js or Json-rpc. You just need to know the methods and their parameters as well as the expected responses that are available to you on the server side.

Hope this helps.

Pascal

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[Aigerim Iskakova]

Thank you! I've got it!

To view this discussion on the web visit https://groups.google.com/d/msgid/json-rpc/CAKoUUBJ79BGDDtkQ4usvOXy%2BEivj%2B%3DxiQ%3DJ0Sn4VoY62VrNBMg%40mail.gmail.com.

--

Sincerely,

--------------------------------------

Aigerim Iskakova

4 year undergraduate student

Electrical and Computer Engineering

School of Engineering

Nazarbayev University

53 Kabanbay Batyr Ave, Astana

Republic of Kazakhstan, 010000

Phone: +7 771 369 37 69 

Mail:  aigerim....@nu.edu.kz

[welfor...@gmail.com]

Just to confirm,

JSON-RPC 1.0 or 2.0 does not have to be sent via any specific method if you're using an HTTP server to handle your requests then you can just use HTTP POST or PUT, if you're using WebSockets you would need to use a WebSocket Tester something like https://chrome.google.com/webstore/detail/simple-websocket-client/pfdhoblngboilpfeibdedpjgfnlcodoo?hl=en,

If your using another custom server method you could use a Telnet client if not encrypted if encrypted you will have to build your own client that works with the server.

[Arne Blankerts]

Hi,

On Wed, 2020-10-21 at 05:25 -0700, welfor...@gmail.com wrote:

> If your using another custom server method you could use a Telnet
> client if not encrypted if encrypted you will have to build your own
> client that works with the server.

Just for the record: No you don't, you use openSSL, e.g. like this:

openssl s_client -crlf -connect <server>:<port>

Just like you'd use telnet.. :)


Regards,
Arne

--
Arne Blankerts <ar...@blankerts.de>
GnuPG Key: 0xEA2EBCDC

[welfor...@gmail.com]

If your using an OpenSSL Encrypted server, you could be using another such as libsodium 

[Arne Blankerts]

On Wed, 2020-10-21 at 06:46 -0700, welfor...@gmail.com wrote:
> If your using an OpenSSL Encrypted server, you could be using another
> such as libsodium

This is getting a bit off-topic, but afaik libsodium is, as the name
suggest, a library and not a CLI client.

I was merely suggesting that if you have a TLS enabled endpoint that is
not speaking HTTP, you could use openssl's telnet-emulation via CLI
rather than writing your own client.