commit

2026-09-10 00:38:07 +00:00 · 2025-10-03 15:28:16 +08:00
parent d5c4b04746
commit fcb83bd16b
925 changed files with 165721 additions and 4 deletions
@@ -0,0 +1,97 @@
+<!DOCTYPE html>
+<html>
+    <body>
+        <h2>CCXT running on a Webworker example</h2>
+        <p>This example uses a web worker to continuously call <b>fetchTicker</b> on a user-defined exchange, symbol and interval. Then, the web worker reaches back with the results.</p>
+        <h3>Parameters</h3>
+        <label for="exchange">Exchange:</label>
+        <input type="text" id="exchange" name="exchange" ><br><br>
+        <label for="symbol">Symbol:   </label>
+        <input type="text" id="symbol" name="symbol"><br><br>
+        <label for="interval">Interval (ms):   </label>
+        <input type="text" id="interval" name="interval"><br><br>
+        <button onclick="startWorker()">Start CCXT worker</button>
+        <button onclick="stopWorker()">Stop CCXT worker</button>
+        <h3> Received Results:</h3>
+        <output id="result"></output>
+        <table id="resultsTable" style="left:300px;width:400px; border:1px solid black;" >
+            <thead>
+                <tr>
+                    <th>Symbol</th>
+                    <th>Last Price</th>
+                    <th>Base Volume</th>
+                    <th>Exchange Ts</th>
+                    <th>Local Ts</th>
+                </tr>
+            </thead>
+            <tbody id="tbody">
+            </tbody>
+        </table>
+    </body>
+    <script>
+        // fill in default values
+        document.addEventListener('DOMContentLoaded', function(event) { 
+                document.getElementById('exchange').value = 'coinbasepro';
+                document.getElementById('symbol').value = 'BTC/USDT';
+                document.getElementById('interval').value = '1000';
+        });
+        
+        var ccxtWorker;
+        function startWorker() {
+        
+          if (typeof(Worker) !== "undefined") {
+            // if the worker does not exist yet, creates it
+            if (typeof(ccxtWorker) == "undefined") {
+              ccxtWorker = new Worker("worker.js");
+            }
+        
+            // reads user-defined parameters
+            var exchange = document.getElementById('exchange').value
+            var symbol = document.getElementById('symbol').value
+            var interval = document.getElementById('interval').value
+            
+            // send a message with those values
+            ccxtWorker.postMessage([exchange,symbol, interval]);
+            
+            ccxtWorker.onmessage = function(event) {
+                // every time the ccxtworker posts a message
+                // this handler will be invoked
+                handleReceivedData(event.data)
+            };
+          } else {
+            document.getElementById("result").innerHTML = "Sorry! No Web Worker support.";
+          }
+        }
+        
+        function handleReceivedData(data) {
+          var [symbol, last, baseVolume, timestamp, ourTimestamp] = data;
+          var tableRef = document.getElementById('resultsTable');
+          var tbody = document.getElementById('tbody');
+          row = tbody.insertRow(0);
+        
+          cellSymbol = row.insertCell();
+          cellSymbol.innerHTML = symbol;
+        
+          cellPrice = row.insertCell();
+          cellPrice.innerHTML = last;
+
+          cellPrice = row.insertCell();
+          cellPrice.innerHTML = baseVolume;
+        
+          cellTimestamp = row.insertCell();
+          cellTimestamp.innerHTML = timestamp;
+        
+          cellOurtimestamp = row.insertCell();
+          cellOurtimestamp.innerHTML = ourTimestamp;
+        
+        }
+        
+        function stopWorker() {
+          if (ccxtWorker !== undefined) {
+            ccxtWorker.terminate();
+            ccxtWorker = undefined;
+          }
+        }
+    </script>
+    </body>
+</html>
@@ -0,0 +1,43 @@
+self.importScripts('https://unpkg.com/ccxt@1.79.2/dist/ccxt.browser.js');
+
+console.log("Loaded ccxt version:", self.ccxt.version);
+
+var exchangeInstance = undefined;
+
+// handler of received messages
+self.onmessage = async function handler(msg) {
+  await handleMessageFromMain(msg)
+}
+
+// get messages from the main script
+async function handleMessageFromMain(msg) {
+  console.log(msg.data);
+  var [exchange, symbol, interval] = msg.data;
+  console.log('Worker received:', symbol,exchange, interval)
+  interval = parseInt(interval)
+  await processTicker(symbol, exchange)  
+  // schedule process ticker execution
+  setInterval (async () => {
+    await processTicker(symbol, exchange)  
+  }, interval)
+}
+
+async function processTicker(symbol, exchangeId) {
+  if (exchangeInstance === undefined) {
+    exchangeInstance = new ccxt[exchangeId]
+  }
+  var result = await fetchTicker(symbol)
+  var symbol = result['symbol']
+  var last = result['last']
+  var timestamp = result['timestamp']
+  var baseVolume = result['baseVolume']
+  var ourTimestamp = Date.now()
+  // send the data back to the main script
+  postMessage([symbol, last, baseVolume, timestamp, ourTimestamp]);
+}
+
+async function fetchTicker(symbol){
+  // use ccxt to fetch ticker info
+  var result = await exchangeInstance.fetchTicker(symbol)
+  return result;
+}