python - Which protocol should I use for pyzmq? -


i working on project have client server model in python. set server monitor requests , send data. pyzmq supports: tcp, udp, pgm, epgm, inproc , ipc. have been using tcp interprocess communication, have no idea should use sending request on internet server. need put in:

    socket.bind(bind_address)

diagram: client communicating on internet server running program

any particular reason you're not using ipc or inproc interprocess communication?

other that, generally, can consider tcp universal communicator; it's not best choice, no matter (so long have ip address) work.

here's need know when making choice between transports:

  1. pgm/epgm multicast transports - idea send 1 message , gets delivered single message until last possible moment broken multiple messages, 1 each receiver. unless absolutely know need this, don't need this.
  2. ipc/inproc interprocess communication... if you're communicating between different threads in same process, or different processes on same logical host, these might appropriate. benefit of little less overhead. if might ever add new logical hosts, not appropriate.
  3. russle borogove enumerates difference between tcp , udp well. typically you'll want use tcp. if absolute speed more important reliability you'll use udp.

it understanding udp wasn't supported zmq, if it's there it's added pyzmq binding.

also, took @ diagram - probably want server zmq socket bind , client zmq socket connect... there reasons why might reverse this, general rule server considered "reliable" peer, , client "transient" peer, , want "reliable" peer bind, "transient" peer connect.


Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod...
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based ...
Read more

ios - Change Storyboard View using Seague -

i have following code checks connection server, , depending on want change views if no connection found. nsstring *connect = [nsstring stringwithcontentsofurl:[nsurl urlwithstring:@"http://myserver.com"] encoding:nsutf8stringencoding error:nil]; if (connect == null) { [self performseguewithidentifier:@"network_failure" sender:self]; } else { // other code here } my problem not change views. have added storyboard segue between 2 views identifier of network_failure . not have navigation controller or that, problem? thanks help! no not problem. first of all, in objectivec exists nil object oriented null . must use that. so: if(connect == nil) or better: if(!connect) so due fact nil not same of null , probably code does't enter in if scope . you have been able discover breakpoint. anyway: be sure set trigger segue (line) 2 view controller , , name network_failure (that not best name. should instead view1toview2 ) as, m...
Read more