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Update accept header used with GraphQL17Alpha9Handler #12973

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Merged
merged 5 commits into from
Oct 21, 2025
Merged

Update accept header used with GraphQL17Alpha9Handler #12973

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4e21031
Add spec version to alpha.9 handler
jerelmiller Oct 14, 2025
0036137
Update size limits
jerelmiller Oct 14, 2025
a67f028
Add changeset
jerelmiller Oct 14, 2025
5db41bb
Update tests
jerelmiller Oct 14, 2025
4b6a9a5
Update to final value of header
jerelmiller Oct 21, 2025
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5 changes: 5 additions & 0 deletions .changeset/slimy-ducks-scream.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@apollo/client": patch
---

Update the `accept` header used with the `GraphQL17Alpha9Handler` to `multipart/mixed;incrementalSpec=v0.2` to ensure the newest incremental delivery format is requested.
8 changes: 4 additions & 4 deletions .size-limits.json
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
{
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\" (CJS)": 44752,
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\" (production) (CJS)": 39500,
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\"": 33897,
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\" (production)": 27749
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\" (CJS)": 44831,
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\" (production) (CJS)": 39452,
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\"": 33875,
"import { ApolloClient, InMemoryCache, HttpLink } from \"@apollo/client\" (production)": 27756
}
6 changes: 5 additions & 1 deletion src/incremental/handlers/graphql17Alpha9.ts
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Expand Up @@ -259,7 +259,11 @@ export class GraphQL17Alpha9Handler
if (hasDirectives(["defer", "stream"], request.query)) {
const context = request.context ?? {};
const http = (context.http ??= {});
http.accept = ["multipart/mixed", ...(http.accept || [])];
// https://specs.apollo.dev/incremental/v0.2/
http.accept = [
"multipart/mixed;incrementalSpec=v0.2",
...(http.accept || []),
];

request.context = context;
}
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4 changes: 2 additions & 2 deletions src/link/http/__tests__/HttpLink.ts
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Expand Up @@ -1636,7 +1636,7 @@ describe("HttpLink", () => {
headers: {
"content-type": "application/json",
accept:
"multipart/mixed,application/graphql-response+json,application/json;q=0.9",
"multipart/mixed;incrementalSpec=v0.2,application/graphql-response+json,application/json;q=0.9",
},
})
);
Expand Down Expand Up @@ -1744,7 +1744,7 @@ describe("HttpLink", () => {
headers: {
"content-type": "application/json",
accept:
"multipart/mixed,application/graphql-response+json,application/json;q=0.9",
"multipart/mixed;incrementalSpec=v0.2,application/graphql-response+json,application/json;q=0.9",
},
})
);
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