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‎samples/api-degradation-scenarios/.devproxy/devproxyrc.json‎

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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "genericRandomErrorPlugin"
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},
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{
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"name": "MockResponsePlugin",
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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "mockResponsePlugin"
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}
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],
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"urlsToWatch": [
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/genericrandomerrorplugin.schema.json",
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"errorsFile": "errors-503.json",
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"rate": 30
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},
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"mockResponsePlugin": {
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/mockresponseplugin.schema.json",
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"mocksFile": "mocks.json"
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}
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}

‎samples/api-degradation-scenarios/.devproxy/errors-503.json‎

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{
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"name": "Retry-After",
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"value": "@dynamic"
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},
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{
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"name": "Access-Control-Allow-Origin",
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"value": "*"
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}
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],
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"body": {
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{
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"name": "Retry-After",
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"value": "@dynamic"
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},
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{
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"name": "Access-Control-Allow-Origin",
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"value": "*"
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}
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],
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"body": {
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{
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"name": "Retry-After",
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"value": "@dynamic"
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},
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{
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"name": "Access-Control-Allow-Origin",
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"value": "*"
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}
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],
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"body": {

‎samples/api-degradation-scenarios/.devproxy/intermittent-errors.devproxyrc.json‎

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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "genericRandomErrorPlugin"
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},
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{
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"name": "MockResponsePlugin",
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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "mockResponsePlugin"
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}
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],
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"urlsToWatch": [
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/genericrandomerrorplugin.schema.json",
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"errorsFile": "errors-503.json",
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"rate": 30
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},
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"mockResponsePlugin": {
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/mockresponseplugin.schema.json",
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"mocksFile": "mocks.json"
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}
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}

‎samples/api-degradation-scenarios/.devproxy/mocks.json‎

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{
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/mockresponseplugin.mocksfile.schema.json",
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"mocks": [
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{
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"request": {
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"url": "https://api.example.com/*"
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},
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"response": {
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"statusCode": 200,
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"headers": [
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{
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"name": "Content-Type",
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"value": "application/json"
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},
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{
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"name": "Access-Control-Allow-Origin",
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"value": "*"
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}
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],
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"body": {
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"status": "ok",
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"message": "Request processed successfully"
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}
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}
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}
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]
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}

‎samples/api-degradation-scenarios/.devproxy/rate-limiting.devproxyrc.json‎

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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "rateLimitingPlugin"
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},
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{
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"name": "MockResponsePlugin",
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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "mockResponsePlugin"
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}
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],
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"urlsToWatch": [
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/ratelimitingplugin.schema.json",
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"costPerRequest": 1,
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"rateLimit": 10
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},
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"mockResponsePlugin": {
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/mockresponseplugin.schema.json",
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"mocksFile": "mocks.json"
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}
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}

‎samples/api-degradation-scenarios/.devproxy/slow-responses.devproxyrc.json‎

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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "latencyPlugin"
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},
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{
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"name": "MockResponsePlugin",
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"enabled": true,
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"pluginPath": "~appFolder/plugins/DevProxy.Plugins.dll",
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"configSection": "mockResponsePlugin"
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}
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],
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"urlsToWatch": [
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/latencyplugin.schema.json",
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"minMs": 3000,
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"maxMs": 5000
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},
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"mockResponsePlugin": {
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"$schema": "https://raw.githubusercontent.com/dotnet/dev-proxy/main/schemas/v2.0.0/mockresponseplugin.schema.json",
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"mocksFile": "mocks.json"
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}
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}

‎samples/api-degradation-scenarios/README.md‎

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Version|Date|Comments
2020
-------|----|--------
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1.0|January 10, 2026|Initial release
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1.0|January 18, 2026|Initial release
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## Prerequisites
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| `.devproxy/rate-limiting.devproxyrc.json` | Rate limiting at 10 requests/minute |
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| `.devproxy/slow-responses.devproxyrc.json` | Random latency between 3-5 seconds |
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| `.devproxy/errors-503.json` | Error responses for the GenericRandomErrorPlugin |
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| `.devproxy/mocks.json` | Mock responses for successful requests |
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| `index.html` | Monitoring dashboard web app |
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| `package.json` | Node.js configuration to run the sample |
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‎samples/api-degradation-scenarios/assets/sample.json‎

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"longDescription": [
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"This sample demonstrates how to simulate various API degradation scenarios including intermittent errors, rate limiting, and slow responses to test your application's resilience."
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],
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"creationDateTime": "2026-01-10",
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"updateDateTime": "2026-01-10",
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"creationDateTime": "2026-01-18",
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"updateDateTime": "2026-01-18",
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"products": [
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"Dev Proxy"
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],
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},
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{
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"key": "MOCKS",
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"value": "No"
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"value": "Yes"
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},
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{
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"key": "PLUGIN",

‎samples/api-degradation-scenarios/assets/screenshot.png‎

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‎samples/api-degradation-scenarios/index.html‎

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@@ -255,6 +255,10 @@ <h1>🔥 API Degradation Scenarios</h1>
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<h3>Total Requests</h3>
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<div class="metric-value neutral" id="totalRequests">0</div>
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</div>
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<div class="metric-card">
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<h3>Pending</h3>
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<div class="metric-value neutral" id="pendingRequests">0</div>
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</div>
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<div class="metric-card">
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<h3>Success Rate</h3>
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<div class="metric-value success" id="successRate">100%</div>
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<h3>Rate Limited (429)</h3>
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<div class="metric-value warning" id="errors429">0</div>
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</div>
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<div class="metric-card">
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<h3>Other Errors</h3>
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<div class="metric-value error" id="otherErrors">0</div>
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</div>
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<div class="metric-card">
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<h3>Successful (2xx)</h3>
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<div class="metric-value success" id="successCount">0</div>
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</div>
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<span class="count" id="error429Percent">0%</span>
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</div>
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<div class="error-bar">
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<span class="label">Other Errors</span>
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<div class="bar-container">
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<div class="bar error-503" id="otherErrorsBar" style="width: 0%"></div>
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</div>
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<span class="count" id="otherErrorsPercent">0%</span>
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</div>
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</div>
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<div class="log-container">
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<script>
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const stats = {
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total: 0,
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pending: 0,
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success: 0,
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error503: 0,
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error429: 0,
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otherErrors: 0,
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totalResponseTime: 0,
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responseTimes: []
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};
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function updateUI() {
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document.getElementById('totalRequests').textContent = stats.total;
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document.getElementById('pendingRequests').textContent = stats.pending;
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const pendingEl = document.getElementById('pendingRequests');
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pendingEl.textContent = stats.pending;
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pendingEl.className = 'metric-value ' + (stats.pending > 0 ? 'warning' : 'neutral');
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document.getElementById('successCount').textContent = stats.success;
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document.getElementById('errors503').textContent = stats.error503;
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document.getElementById('errors429').textContent = stats.error429;
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document.getElementById('otherErrors').textContent = stats.otherErrors;
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const successRate = stats.total > 0 ? ((stats.success / stats.total) * 100).toFixed(1) : 100;
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const successRateEl = document.getElementById('successRate');
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const successPercent = (stats.success / stats.total) * 100;
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const error503Percent = (stats.error503 / stats.total) * 100;
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const error429Percent = (stats.error429 / stats.total) * 100;
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const otherErrorsPercent = (stats.otherErrors / stats.total) * 100;
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document.getElementById('successBar').style.width = successPercent + '%';
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document.getElementById('error503Bar').style.width = error503Percent + '%';
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document.getElementById('error429Bar').style.width = error429Percent + '%';
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document.getElementById('otherErrorsBar').style.width = otherErrorsPercent + '%';
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document.getElementById('successPercent').textContent = successPercent.toFixed(0) + '%';
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document.getElementById('error503Percent').textContent = error503Percent.toFixed(0) + '%';
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document.getElementById('error429Percent').textContent = error429Percent.toFixed(0) + '%';
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document.getElementById('otherErrorsPercent').textContent = otherErrorsPercent.toFixed(0) + '%';
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}
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}
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async function makeRequest() {
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const startTime = performance.now();
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stats.pending++;
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updateUI();
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try {
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const response = await fetch('https://api.example.com/data', {
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const endTime = performance.now();
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const responseTime = Math.round(endTime - startTime);
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stats.pending--;
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stats.total++;
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stats.totalResponseTime += responseTime;
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stats.responseTimes.push(responseTime);
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const retryAfter = response.headers.get('Retry-After');
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addLogEntry(response.status, responseTime, `Rate limited. Retry after: ${retryAfter || 'unknown'}s`);
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} else {
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stats.otherErrors++;
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addLogEntry(response.status, responseTime, `HTTP ${response.status}`);
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}
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} catch (error) {
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const endTime = performance.now();
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const responseTime = Math.round(endTime - startTime);
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stats.pending--;
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stats.total++;
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stats.totalResponseTime += responseTime;
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function clearStats() {
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stats.total = 0;
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stats.pending = 0;
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stats.success = 0;
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stats.error503 = 0;
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stats.error429 = 0;
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stats.otherErrors = 0;
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stats.totalResponseTime = 0;
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stats.responseTimes = [];
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