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harbor

Harbor is a lightweight load balancer written in Rust. It is fun side-project to learn more about networking and load balancing. And also to learn Rust better. Not intended for production use.

This project does not use any external libraries for handling HTTP requests. It is built from scratch using the std::net and std::thread modules. I used httparse for parsing the HTTP requests.

Roadmap

Here are some of the features that I plan to implement in the future. As of now, I am focusing on the basic features and will add more features as I go along.

  • Supports HTTP/1.1
  • Add support for HTTP/2
  • Add support for keep-alive connections
  • Load balancing algorithms
    • Round-robin
    • Weighted round-robin
    • Least Active Connections
    • Random
    • Least Response Time
    • IP Hash
  • Health checks for backend servers
  • Configuration file support
  • Logging

Usage

First of all, you will need to have Rust installed on your system. Then you could simply run the ./start.sh script to start the server. The server will start on localhost:8080 by default. This will also start a few backend servers on localhost:8081, localhost:8082 and localhost:8083.

You can pass a config file. Use environment variable HARBOR_CONFIG to specify the path to the config file. You can find an example config in the config.json file.

To test the load balancer performance (and how it performs under load), you can use the siege tool. Here is an example command to test the load balancer:

siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output

And this is how it performed on my machine (Ryzen 5/16GB RAM):

Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00

License

This project is licensed under the MIT License - see the LICENSE file for details.

Check out Coding Challenges.

About

Harbor is a load balancer written in Rust

Topics

load-balancernetworkrust

Resources

Readme
MIT license
Activity

Stars

1 star

Watchers

1 watching

Forks

0 forks
Report repository

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
Repository files navigation
harbor
Harbor is a lightweight load balancer written in Rust. It is fun side-project
to learn more about networking and load balancing. And also to learn Rust
better. Not intended for production use.
This project does not use any external libraries for handling HTTP requests. It
is built from scratch using the std::net and std::thread modules. I used
httparse for parsing the HTTP requests.
Roadmap
Here are some of the features that I plan to implement in the future. As of
now, I am focusing on the basic features and will add more features as I go
along.
  •  Supports HTTP/1.1
  •  Add support for HTTP/2
  •  Add support for keep-alive connections
  • Load balancing algorithms

    •  Round-robin
    •  Weighted round-robin
    •  Least Active Connections
    •  Random
    •  Least Response Time
    •  IP Hash
  •  Health checks for backend servers
  •  Configuration file support
  •  Logging
Usage
First of all, you will need to have Rust installed on your system. Then you
could simply run the ./start.sh script to start the server. The server will
start on localhost:8080 by default. This will also start a few backend
servers on localhost:8081, localhost:8082 and localhost:8083.
You can pass a config file. Use environment variable HARBOR_CONFIG to specify
the path to the config file. You can find an example config in the
config.json file.
To test the load balancer performance (and how it performs under load), you can
use the siege tool. Here is an example command to test the load balancer:
siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output
And this is how it performed on my machine (Ryzen 5/16GB RAM):
Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00
License
This project is licensed under the MIT License - see the LICENSE
file for details.
Check out Coding Challenges.
About
Harbor is a load balancer written in Rust
Topics
load-balancernetworkrust
Resources
Readme
MIT license
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
harbor
Harbor is a lightweight load balancer written in Rust. It is fun side-project
to learn more about networking and load balancing. And also to learn Rust
better. Not intended for production use.
This project does not use any external libraries for handling HTTP requests. It
is built from scratch using the std::net and std::thread modules. I used
httparse for parsing the HTTP requests.
Roadmap
Here are some of the features that I plan to implement in the future. As of
now, I am focusing on the basic features and will add more features as I go
along.
  •  Supports HTTP/1.1
  •  Add support for HTTP/2
  •  Add support for keep-alive connections
  • Load balancing algorithms

    •  Round-robin
    •  Weighted round-robin
    •  Least Active Connections
    •  Random
    •  Least Response Time
    •  IP Hash
  •  Health checks for backend servers
  •  Configuration file support
  •  Logging
Usage
First of all, you will need to have Rust installed on your system. Then you
could simply run the ./start.sh script to start the server. The server will
start on localhost:8080 by default. This will also start a few backend
servers on localhost:8081, localhost:8082 and localhost:8083.
You can pass a config file. Use environment variable HARBOR_CONFIG to specify
the path to the config file. You can find an example config in the
config.json file.
To test the load balancer performance (and how it performs under load), you can
use the siege tool. Here is an example command to test the load balancer:
siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output
And this is how it performed on my machine (Ryzen 5/16GB RAM):
Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00
License
This project is licensed under the MIT License - see the LICENSE
file for details.
Check out Coding Challenges.
About
Harbor is a load balancer written in Rust
Topics
load-balancernetworkrust
Resources
Readme
MIT license
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
harbor
Harbor is a lightweight load balancer written in Rust. It is fun side-project
to learn more about networking and load balancing. And also to learn Rust
better. Not intended for production use.
This project does not use any external libraries for handling HTTP requests. It
is built from scratch using the std::net and std::thread modules. I used
httparse for parsing the HTTP requests.
Roadmap
Here are some of the features that I plan to implement in the future. As of
now, I am focusing on the basic features and will add more features as I go
along.
  •  Supports HTTP/1.1
  •  Add support for HTTP/2
  •  Add support for keep-alive connections
  • Load balancing algorithms

    •  Round-robin
    •  Weighted round-robin
    •  Least Active Connections
    •  Random
    •  Least Response Time
    •  IP Hash
  •  Health checks for backend servers
  •  Configuration file support
  •  Logging
Usage
First of all, you will need to have Rust installed on your system. Then you
could simply run the ./start.sh script to start the server. The server will
start on localhost:8080 by default. This will also start a few backend
servers on localhost:8081, localhost:8082 and localhost:8083.
You can pass a config file. Use environment variable HARBOR_CONFIG to specify
the path to the config file. You can find an example config in the
config.json file.
To test the load balancer performance (and how it performs under load), you can
use the siege tool. Here is an example command to test the load balancer:
siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output
And this is how it performed on my machine (Ryzen 5/16GB RAM):
Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00
License
This project is licensed under the MIT License - see the LICENSE
file for details.
Check out Coding Challenges.
About
Harbor is a load balancer written in Rust
Topics
load-balancernetworkrust
Resources
Readme
MIT license
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
harbor
Harbor is a lightweight load balancer written in Rust. It is fun side-project
to learn more about networking and load balancing. And also to learn Rust
better. Not intended for production use.
This project does not use any external libraries for handling HTTP requests. It
is built from scratch using the std::net and std::thread modules. I used
httparse for parsing the HTTP requests.
Roadmap
Here are some of the features that I plan to implement in the future. As of
now, I am focusing on the basic features and will add more features as I go
along.
  •  Supports HTTP/1.1
  •  Add support for HTTP/2
  •  Add support for keep-alive connections
  • Load balancing algorithms

    •  Round-robin
    •  Weighted round-robin
    •  Least Active Connections
    •  Random
    •  Least Response Time
    •  IP Hash
  •  Health checks for backend servers
  •  Configuration file support
  •  Logging
Usage
First of all, you will need to have Rust installed on your system. Then you
could simply run the ./start.sh script to start the server. The server will
start on localhost:8080 by default. This will also start a few backend
servers on localhost:8081, localhost:8082 and localhost:8083.
You can pass a config file. Use environment variable HARBOR_CONFIG to specify
the path to the config file. You can find an example config in the
config.json file.
To test the load balancer performance (and how it performs under load), you can
use the siege tool. Here is an example command to test the load balancer:
siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output
And this is how it performed on my machine (Ryzen 5/16GB RAM):
Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00
License
This project is licensed under the MIT License - see the LICENSE
file for details.
Check out Coding Challenges.
About
Harbor is a load balancer written in Rust
Topics
load-balancernetworkrust
Resources
Readme
MIT license
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
harbor
Harbor is a lightweight load balancer written in Rust. It is fun side-project
to learn more about networking and load balancing. And also to learn Rust
better. Not intended for production use.
This project does not use any external libraries for handling HTTP requests. It
is built from scratch using the std::net and std::thread modules. I used
httparse for parsing the HTTP requests.
Roadmap
Here are some of the features that I plan to implement in the future. As of
now, I am focusing on the basic features and will add more features as I go
along.
  •  Supports HTTP/1.1
  •  Add support for HTTP/2
  •  Add support for keep-alive connections
  • Load balancing algorithms

    •  Round-robin
    •  Weighted round-robin
    •  Least Active Connections
    •  Random
    •  Least Response Time
    •  IP Hash
  •  Health checks for backend servers
  •  Configuration file support
  •  Logging
Usage
First of all, you will need to have Rust installed on your system. Then you
could simply run the ./start.sh script to start the server. The server will
start on localhost:8080 by default. This will also start a few backend
servers on localhost:8081, localhost:8082 and localhost:8083.
You can pass a config file. Use environment variable HARBOR_CONFIG to specify
the path to the config file. You can find an example config in the
config.json file.
To test the load balancer performance (and how it performs under load), you can
use the siege tool. Here is an example command to test the load balancer:
siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output
And this is how it performed on my machine (Ryzen 5/16GB RAM):
Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00
License
This project is licensed under the MIT License - see the LICENSE
file for details.
Check out Coding Challenges.
About
Harbor is a load balancer written in Rust
Topics
load-balancernetworkrust
Resources
Readme
MIT license
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
harbor
Harbor is a lightweight load balancer written in Rust. It is fun side-project
to learn more about networking and load balancing. And also to learn Rust
better. Not intended for production use.
This project does not use any external libraries for handling HTTP requests. It
is built from scratch using the std::net and std::thread modules. I used
httparse for parsing the HTTP requests.
Roadmap
Here are some of the features that I plan to implement in the future. As of
now, I am focusing on the basic features and will add more features as I go
along.
  •  Supports HTTP/1.1
  •  Add support for HTTP/2
  •  Add support for keep-alive connections
  • Load balancing algorithms

    •  Round-robin
    •  Weighted round-robin
    •  Least Active Connections
    •  Random
    •  Least Response Time
    •  IP Hash
  •  Health checks for backend servers
  •  Configuration file support
  •  Logging
Usage
First of all, you will need to have Rust installed on your system. Then you
could simply run the ./start.sh script to start the server. The server will
start on localhost:8080 by default. This will also start a few backend
servers on localhost:8081, localhost:8082 and localhost:8083.
You can pass a config file. Use environment variable HARBOR_CONFIG to specify
the path to the config file. You can find an example config in the
config.json file.
To test the load balancer performance (and how it performs under load), you can
use the siege tool. Here is an example command to test the load balancer:
siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output
And this is how it performed on my machine (Ryzen 5/16GB RAM):
Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00
License
This project is licensed under the MIT License - see the LICENSE
file for details.
Check out Coding Challenges.
About
Harbor is a load balancer written in Rust
Topics
load-balancernetworkrust
Resources
Readme
MIT license
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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harbor
Harbor is a lightweight load balancer written in Rust. It is fun side-project
to learn more about networking and load balancing. And also to learn Rust
better. Not intended for production use.
This project does not use any external libraries for handling HTTP requests. It
is built from scratch using the std::net and std::thread modules. I used
httparse for parsing the HTTP requests.
Roadmap
Here are some of the features that I plan to implement in the future. As of
now, I am focusing on the basic features and will add more features as I go
along.
  •  Supports HTTP/1.1
  •  Add support for HTTP/2
  •  Add support for keep-alive connections
  • Load balancing algorithms

    •  Round-robin
    •  Weighted round-robin
    •  Least Active Connections
    •  Random
    •  Least Response Time
    •  IP Hash
  •  Health checks for backend servers
  •  Configuration file support
  •  Logging
Usage
First of all, you will need to have Rust installed on your system. Then you
could simply run the ./start.sh script to start the server. The server will
start on localhost:8080 by default. This will also start a few backend
servers on localhost:8081, localhost:8082 and localhost:8083.
You can pass a config file. Use environment variable HARBOR_CONFIG to specify
the path to the config file. You can find an example config in the
config.json file.
To test the load balancer performance (and how it performs under load), you can
use the siege tool. Here is an example command to test the load balancer:
siege -t1M -c1000 -v http://0.0.0.0:8080
# -t1M: Run the test for 1 minute# -c1000: Use 1000 concurrent connections# -v: Verbose output
And this is how it performed on my machine (Ryzen 5/16GB RAM):
Lifting the server siege...
Transactions: 173012 hits
Availability: 100.00 %
Elapsed time: 60.58 secs
Data transferred: 25.29 MB
Response time: 0.31 secs
Transaction rate: 2855.93 trans/sec
Throughput: 0.42 MB/sec
Concurrency: 892.15
Successful transactions: 173013
Failed transactions: 0
Longest transaction: 54.73
Shortest transaction: 0.00
License
This project is licensed under the MIT License - see the LICENSE
file for details.
Check out Coding Challenges.
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Harbor is a load balancer written in Rust
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