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This is a starting point for Go solutions to the "Build Your Own HTTP server" Challenge.

HTTP is the protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server that is capable of serving multiple clients.

Along the way you'll learn about TCP servers, HTTP request syntax, and more.

Note: If you're viewing this repo on GitHub, head over to codecrafters.io to try the challenge.

Passing the first stage

The entry point for your HTTP server implementation is in app/main.go. Study and uncomment the relevant code, and push your changes to pass the first stage:

git commit -am "pass 1st stage"# any msg
git push origin master

Time to move on to the next stage!

Stage 2 & beyond

Note: This section is for stages 2 and beyond.

  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in app/main.go.
  3. Commit your changes and run git push origin master to submit your solution to CodeCrafters. Test output will be streamed to your terminal.

About

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, '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" + '

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This is a starting point for Go solutions to the
"Build Your Own HTTP server" Challenge.
HTTP is the
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
that is capable of serving multiple clients.
Along the way you'll learn about TCP servers,
HTTP request syntax,
and more.
Note: If you're viewing this repo on GitHub, head over to
codecrafters.io to try the challenge.
Passing the first stage
The entry point for your HTTP server implementation is in app/main.go. Study
and uncomment the relevant code, and push your changes to pass the first stage:
git commit -am "pass 1st stage"# any msg
git push origin master
Time to move on to the next stage!
Stage 2 & beyond
Note: This section is for stages 2 and beyond.
  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in
app/main.go.
  3. Commit your changes and run git push origin master to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.
About
No description, website, or topics provided.
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
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Used by
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, '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
progress-banner
This is a starting point for Go solutions to the
"Build Your Own HTTP server" Challenge.
HTTP is the
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
that is capable of serving multiple clients.
Along the way you'll learn about TCP servers,
HTTP request syntax,
and more.
Note: If you're viewing this repo on GitHub, head over to
codecrafters.io to try the challenge.
Passing the first stage
The entry point for your HTTP server implementation is in app/main.go. Study
and uncomment the relevant code, and push your changes to pass the first stage:
git commit -am "pass 1st stage"# any msg
git push origin master
Time to move on to the next stage!
Stage 2 & beyond
Note: This section is for stages 2 and beyond.
  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in
app/main.go.
  3. Commit your changes and run git push origin master to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.
About
No description, website, or topics provided.
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
progress-banner
This is a starting point for Go solutions to the
"Build Your Own HTTP server" Challenge.
HTTP is the
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
that is capable of serving multiple clients.
Along the way you'll learn about TCP servers,
HTTP request syntax,
and more.
Note: If you're viewing this repo on GitHub, head over to
codecrafters.io to try the challenge.
Passing the first stage
The entry point for your HTTP server implementation is in app/main.go. Study
and uncomment the relevant code, and push your changes to pass the first stage:
git commit -am "pass 1st stage"# any msg
git push origin master
Time to move on to the next stage!
Stage 2 & beyond
Note: This section is for stages 2 and beyond.
  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in
app/main.go.
  3. Commit your changes and run git push origin master to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.
About
No description, website, or topics provided.
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
progress-banner
This is a starting point for Go solutions to the
"Build Your Own HTTP server" Challenge.
HTTP is the
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
that is capable of serving multiple clients.
Along the way you'll learn about TCP servers,
HTTP request syntax,
and more.
Note: If you're viewing this repo on GitHub, head over to
codecrafters.io to try the challenge.
Passing the first stage
The entry point for your HTTP server implementation is in app/main.go. Study
and uncomment the relevant code, and push your changes to pass the first stage:
git commit -am "pass 1st stage"# any msg
git push origin master
Time to move on to the next stage!
Stage 2 & beyond
Note: This section is for stages 2 and beyond.
  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in
app/main.go.
  3. Commit your changes and run git push origin master to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.
About
No description, website, or topics provided.
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
progress-banner
This is a starting point for Go solutions to the
"Build Your Own HTTP server" Challenge.
HTTP is the
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
that is capable of serving multiple clients.
Along the way you'll learn about TCP servers,
HTTP request syntax,
and more.
Note: If you're viewing this repo on GitHub, head over to
codecrafters.io to try the challenge.
Passing the first stage
The entry point for your HTTP server implementation is in app/main.go. Study
and uncomment the relevant code, and push your changes to pass the first stage:
git commit -am "pass 1st stage"# any msg
git push origin master
Time to move on to the next stage!
Stage 2 & beyond
Note: This section is for stages 2 and beyond.
  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in
app/main.go.
  3. Commit your changes and run git push origin master to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.
About
No description, website, or topics provided.
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
progress-banner
This is a starting point for Go solutions to the
"Build Your Own HTTP server" Challenge.
HTTP is the
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
that is capable of serving multiple clients.
Along the way you'll learn about TCP servers,
HTTP request syntax,
and more.
Note: If you're viewing this repo on GitHub, head over to
codecrafters.io to try the challenge.
Passing the first stage
The entry point for your HTTP server implementation is in app/main.go. Study
and uncomment the relevant code, and push your changes to pass the first stage:
git commit -am "pass 1st stage"# any msg
git push origin master
Time to move on to the next stage!
Stage 2 & beyond
Note: This section is for stages 2 and beyond.
  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in
app/main.go.
  3. Commit your changes and run git push origin master to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.
About
No description, website, or topics provided.
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
progress-banner
This is a starting point for Go solutions to the
"Build Your Own HTTP server" Challenge.
HTTP is the
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
that is capable of serving multiple clients.
Along the way you'll learn about TCP servers,
HTTP request syntax,
and more.
Note: If you're viewing this repo on GitHub, head over to
codecrafters.io to try the challenge.
Passing the first stage
The entry point for your HTTP server implementation is in app/main.go. Study
and uncomment the relevant code, and push your changes to pass the first stage:
git commit -am "pass 1st stage"# any msg
git push origin master
Time to move on to the next stage!
Stage 2 & beyond
Note: This section is for stages 2 and beyond.
  1. Ensure you have go (1.24) installed locally
  2. Run ./your_program.sh to run your program, which is implemented in
app/main.go.
  3. Commit your changes and run git push origin master to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.
About
No description, website, or topics provided.
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages