Streamable HTTP - resume streams on disconnect - #332

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Streamable HTTP - resume streams on disconnect#332
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As per spec servers might support resumability and redelivery.

Introducing resumability and re-delivery of events for disconnection within the same client.

  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing

Follow ups:

  • resume long running requests from a new instance of the client

@ihrpr
ihrpr changed the base branch from main to streamablehttp-server-testsApril 13, 2025 20:58
jspahrsummers
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.

Comment threadsrc/client/streamableHttp.ts
* Maximum backoff time between reconnection attempts in milliseconds.
* Default is 30000 (30 seconds).
*/
maxReconnectionDelay: number;

@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.

@ihrprihrprApr 15, 2025

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the logic is minimal, can come back to this later if it's non-blocking?

Comment threadsrc/client/streamableHttp.ts Outdated
Comment threadsrc/client/streamableHttp.ts Outdated
Comment threadsrc/client/streamableHttp.ts Outdated
Comment threadsrc/client/streamableHttp.ts Outdated
Comment threadsrc/client/streamableHttp.ts Outdated
Comment threadsrc/client/streamableHttp.ts Outdated
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts Outdated
Base automatically changed from streamablehttp-server-tests to mainApril 15, 2025 08:07
jspahrsummers
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thankyou

I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.

Comment threadsrc/server/streamableHttp.ts Outdated
@ihrpr
ihrpr merged commit 9ed2254 into mainApr 15, 2025
@ihrpr
ihrpr deleted the resumability branch April 15, 2025 17:45
@felixweinbergerfelixweinberger mentioned this pull request Oct 30, 2025
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
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;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
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codeBlock.parentElement.style.position = 'relative';
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addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} 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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Streamable HTTP - resume streams on disconnect - #332
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ihrpr merged 10 commits into
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resumability
Apr 15, 2025
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Streamable HTTP - resume streams on disconnect#332
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resumability
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As per spec servers might support resumability and redelivery.
Introducing resumability and re-delivery of events for disconnection within the same client.
  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing
Follow ups:
  • resume long running requests from a new instance of the client
@ihrpr
ihrpr
changed the base branch from
main
to
streamablehttp-server-testsApril 13, 2025 20:58
jspahrsummers
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.
Comment threadsrc/client/streamableHttp.ts
 * Maximum backoff time between reconnection attempts in milliseconds.
 * Default is 30000 (30 seconds).
 */
 maxReconnectionDelay: number;
@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.
@ihrprihrprApr 15, 2025

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the logic is minimal, can come back to this later if it's non-blocking?
Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Outdated


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thankyou
I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.
Comment threadsrc/server/streamableHttp.ts
Outdated

@ihrpr
ihrpr
merged commit 9ed2254
into
mainApr 15, 2025
@ihrpr
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resumability

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

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Streamable HTTP - resume streams on disconnect - #332
Merged
ihrpr merged 10 commits into
mainfrom 
resumability
Apr 15, 2025
Merged
Streamable HTTP - resume streams on disconnect#332
ihrpr merged 10 commits into
mainfrom 
resumability
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@ihrpr
@ihrprihrpr
commented
Apr 13, 2025

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As per spec servers might support resumability and redelivery.
Introducing resumability and re-delivery of events for disconnection within the same client.
  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing
Follow ups:
  • resume long running requests from a new instance of the client
@ihrpr
ihrpr
changed the base branch from
main
to
streamablehttp-server-testsApril 13, 2025 20:58
jspahrsummers
jspahrsummers
requested changes
Apr 14, 2025
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.
Comment threadsrc/client/streamableHttp.ts
 * Maximum backoff time between reconnection attempts in milliseconds.
 * Default is 30000 (30 seconds).
 */
 maxReconnectionDelay: number;
@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.
@ihrprihrprApr 15, 2025

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the logic is minimal, can come back to this later if it's non-blocking?
Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Outdated


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thankyou
I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.
Comment threadsrc/server/streamableHttp.ts
Outdated

@ihrpr
ihrpr
merged commit 9ed2254
into
mainApr 15, 2025
@ihrpr
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deleted the

resumability

branch
April 15, 2025 17:45
@felixweinbergerfelixweinberger
mentioned this pull request
Oct 30, 2025

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
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var found = false;
terms.forEach(function(term) {
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frag.appendChild(document.createTextNode(part));
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});
node.parentNode.replaceChild(frag, node);
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});
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if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
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highlight(document.body);
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mutations.forEach(function(m) {
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if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
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observer.observe(document.body, { childList: true, subtree: true });
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}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Streamable HTTP - resume streams on disconnect - #332
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ihrpr merged 10 commits into
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resumability
Apr 15, 2025
Merged
Streamable HTTP - resume streams on disconnect#332
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resumability
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As per spec servers might support resumability and redelivery.
Introducing resumability and re-delivery of events for disconnection within the same client.
  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing
Follow ups:
  • resume long running requests from a new instance of the client
@ihrpr
ihrpr
changed the base branch from
main
to
streamablehttp-server-testsApril 13, 2025 20:58
jspahrsummers
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.
Comment threadsrc/client/streamableHttp.ts
 * Maximum backoff time between reconnection attempts in milliseconds.
 * Default is 30000 (30 seconds).
 */
 maxReconnectionDelay: number;
@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.
@ihrprihrprApr 15, 2025

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the logic is minimal, can come back to this later if it's non-blocking?
Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
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thankyou
I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.
Comment threadsrc/server/streamableHttp.ts
Outdated

@ihrpr
ihrpr
merged commit 9ed2254
into
mainApr 15, 2025
@ihrpr
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resumability

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

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Streamable HTTP - resume streams on disconnect - #332
Merged
ihrpr merged 10 commits into
mainfrom 
resumability
Apr 15, 2025
Merged
Streamable HTTP - resume streams on disconnect#332
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resumability
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As per spec servers might support resumability and redelivery.
Introducing resumability and re-delivery of events for disconnection within the same client.
  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing
Follow ups:
  • resume long running requests from a new instance of the client
@ihrpr
ihrpr
changed the base branch from
main
to
streamablehttp-server-testsApril 13, 2025 20:58
jspahrsummers
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Apr 14, 2025
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.
Comment threadsrc/client/streamableHttp.ts
 * Maximum backoff time between reconnection attempts in milliseconds.
 * Default is 30000 (30 seconds).
 */
 maxReconnectionDelay: number;
@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.
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the logic is minimal, can come back to this later if it's non-blocking?
Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
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thankyou
I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.
Comment threadsrc/server/streamableHttp.ts
Outdated

@ihrpr
ihrpr
merged commit 9ed2254
into
mainApr 15, 2025
@ihrpr
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deleted the

resumability

branch
April 15, 2025 17:45
@felixweinbergerfelixweinberger
mentioned this pull request
Oct 30, 2025

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

Skip to content
Streamable HTTP - resume streams on disconnect - #332
Merged
ihrpr merged 10 commits into
mainfrom 
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Apr 15, 2025
Merged
Streamable HTTP - resume streams on disconnect#332
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As per spec servers might support resumability and redelivery.
Introducing resumability and re-delivery of events for disconnection within the same client.
  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing
Follow ups:
  • resume long running requests from a new instance of the client
@ihrpr
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.
Comment threadsrc/client/streamableHttp.ts
 * Maximum backoff time between reconnection attempts in milliseconds.
 * Default is 30000 (30 seconds).
 */
 maxReconnectionDelay: number;
@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.
@ihrprihrprApr 15, 2025

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the logic is minimal, can come back to this later if it's non-blocking?
Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
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thankyou
I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.
Comment threadsrc/server/streamableHttp.ts
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@ihrpr
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merged commit 9ed2254
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@ihrpr
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resumability

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April 15, 2025 17:45
@felixweinbergerfelixweinberger
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Streamable HTTP - resume streams on disconnect - #332
Merged
ihrpr merged 10 commits into
mainfrom 
resumability
Apr 15, 2025
Merged
Streamable HTTP - resume streams on disconnect#332
ihrpr merged 10 commits into
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resumability
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@ihrpr
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Apr 13, 2025

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As per spec servers might support resumability and redelivery.
Introducing resumability and re-delivery of events for disconnection within the same client.
  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing
Follow ups:
  • resume long running requests from a new instance of the client
@ihrpr
ihrpr
changed the base branch from
main
to
streamablehttp-server-testsApril 13, 2025 20:58
jspahrsummers
jspahrsummers
requested changes
Apr 14, 2025
View reviewed changes
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.
Comment threadsrc/client/streamableHttp.ts
 * Maximum backoff time between reconnection attempts in milliseconds.
 * Default is 30000 (30 seconds).
 */
 maxReconnectionDelay: number;
@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.
@ihrprihrprApr 15, 2025

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the logic is minimal, can come back to this later if it's non-blocking?
Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
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Base automatically changed from
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jspahrsummers
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thankyou
I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.
Comment threadsrc/server/streamableHttp.ts
Outdated

@ihrpr
ihrpr
merged commit 9ed2254
into
mainApr 15, 2025
@ihrpr
ihrpr
deleted the

resumability

branch
April 15, 2025 17:45
@felixweinbergerfelixweinberger
mentioned this pull request
Oct 30, 2025

Closed

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
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style = document.createElement('style');
style.id = 'universal-dark-mode-style';
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}
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background: #1a1a2e !important;
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filter: invert(1) hue-rotate(180deg) !important;
}
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[data-theme="light"], [data-theme="light"],
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.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
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::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
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if (style) style.remove();
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console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
Streamable HTTP - resume streams on disconnect - #332
Merged
ihrpr merged 10 commits into
mainfrom 
resumability
Apr 15, 2025
Merged
Streamable HTTP - resume streams on disconnect#332
ihrpr merged 10 commits into
mainfrom 
resumability
Conversation
@ihrpr
@ihrprihrpr
commented
Apr 13, 2025

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As per spec servers might support resumability and redelivery.
Introducing resumability and re-delivery of events for disconnection within the same client.
  • maintaining a map of streamID per request
  • moved a special case for standalone stream to a map for simplicity
  • adding StreamableHTTPReconnectionOptions interface for custom reconnection and backoff
  • adding example of start-notification-stream' tool which starts notifications for that can be used for testing
Follow ups:
  • resume long running requests from a new instance of the client
@ihrpr
ihrpr
changed the base branch from
main
to
streamablehttp-server-testsApril 13, 2025 20:58
jspahrsummers
jspahrsummers
requested changes
Apr 14, 2025
View reviewed changes
@jspahrsummersjspahrsummers
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Haven't had a chance to look at the examples or tests in depth yet, but pointed out some things I think we need to change before getting this in.
Comment threadsrc/client/streamableHttp.ts
 * Maximum backoff time between reconnection attempts in milliseconds.
 * Default is 30000 (30 seconds).
 */
 maxReconnectionDelay: number;
@jspahrsummersjspahrsummersApr 14, 2025

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There's probably a library on npm that can do some of this out of the box.
@ihrprihrprApr 15, 2025

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the logic is minimal, can come back to this later if it's non-blocking?
Comment threadsrc/client/streamableHttp.ts
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Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/client/streamableHttp.ts
Outdated

Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Comment threadsrc/server/streamableHttp.ts
Outdated


Base automatically changed from
streamablehttp-server-tests to
mainApril 15, 2025 08:07
jspahrsummers
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Apr 15, 2025
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thankyou
I don't have bandwidth to review the tests and examples, but the main implementation looks good to me now.
Comment threadsrc/server/streamableHttp.ts
Outdated

@ihrpr
ihrpr
merged commit 9ed2254
into
mainApr 15, 2025
@ihrpr
ihrpr
deleted the

resumability

branch
April 15, 2025 17:45
@felixweinbergerfelixweinberger
mentioned this pull request
Oct 30, 2025

Closed

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