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Origin of files `holoclient.js` and `holoclient.map` in holochain application?


By : user2176097
Date : October 14 2020, 02:22 PM
wish helps you ui/holoclient.js is a tiny library that makes it much easier to talk to a running Holochain app instance. The current way of connecting your GUI to an instance is a JSON-RPC-like process via a local WebSocket connection. It's intended as a nice wrapper to make zome function calls feel like local, in-browser function calls. Documentation is currently very light, but it shouldn't take much to figure out how it's supposed to work using the example. In a nutshell:
code :
const url =  'ws://localhost:3000/'
window.holoclient.connect(url).then(({call, close}) => {
  document.getElementById('form').addEventListener('submit', e => {
    e.preventDefault()
    // First, get a list of locally running Holochain instances...
    call('info/instances')().then(info => {
      // Now that we have instance info, we can make zome calls into any of them
      // by referring to them by DNA hash (and agent ID) as specified in our
      // container config.
      // Search for the instance we're looking for, given known DNA and agent
      // hashes.
      const matchingInstances = Object.entries(info)
        .find(([id, value]) => value.dna === 'blog_dna_hash' && value.agent === 'my_agent_hash')
      const instance = getInstance(info, 'the_dna_hash', 'the_agent_hash')
      const content = document.querySelector('#message').value
      // Make another zome call now
      call(instance, 'blog', 'main', 'create_post')({
        content: content
      })
    })
  })
})


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Origin http://localhost:3000 is not allowed by Access-Control-Allow-Origin in Rails 3 application


By : Will Spencer
Date : March 29 2020, 07:55 AM
seems to work fine The following PHP code works for me. Note that the if (...) are very important, if you returns the same CORES header for all request then (at least) chrome will cancel request (for at least localhost server)
code :
<?php
if (isset($_SERVER['HTTP_ORIGIN'])) {
    //header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
    header("Access-Control-Allow-Origin: *");
    header('Access-Control-Allow-Credentials: true');    
    header("Access-Control-Allow-Methods: GET, POST, OPTIONS"); 
}   
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
    if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
        header("Access-Control-Allow-Methods: GET, POST, OPTIONS");         
    if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
        header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");

    exit(0);
} 

Twitter :Application-only authentication error Origin null is not allowed by Access-Control-Allow-Origin


By : lil_so_so
Date : March 29 2020, 07:55 AM
I hope this helps . You are sending a cross domain ajax request from your browser, which is mostly not allowed for security reasons. You must send the request from your server instead of client's browser.

Access-Control-Allow-Origin header when Origin 'null' when trying to post data to a LOCAL application


By : user2101972
Date : March 29 2020, 07:55 AM
I hope this helps you . Ok I solved the issue. I had to edit the bitcoinrpc file it's self to handle CORS.
http://www.html5rocks.com/en/tutorials/cors/

Why the origin of contentview doesn't coincide the origin of scrollview when application setup?


By : Sko
Date : March 29 2020, 07:55 AM
I wish this help you Make the UIScrollView a global variable. Make the contentInset of the UIScrollView and UIScrollView's indicators UIEdgeInsetsZero when the views are loaded like this:
code :
- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];
    _scrollView.contentInset = UIEdgeInsetsZero;
    _scrollView.scrollIndicatorInsets = UIEdgeInsetsZero;
}

In holochain-rust what is the best way get and show a list of all users?


By : dbau
Date : March 29 2020, 07:55 AM
wish helps you Link from the DNA Hash (not recommended; read about anchors below)
Each user could link from the DNA hash to themselves in the genesis() function -- the DNA hash is the one hash on the DHT that everyone knows. Then all you need to do is getLinks(App.DNA.Hash, "user") to get them all. (watch out, it could get to be a huge list. I also feel bad for the poor nodes who are in the neighborhood of the DNA hash... that's a lot of metadata to store.
code :
function genesis() {
    commit({ Links: [ { Base: App.DNA.Hash, Link: App.Key.Hash, Tag: "registered_user" } ] };
}
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