nestjs/nest `513080d8..7850c9ab`

base and head as given

Server-sent event endpoints are now part of the HTTP routing API
HTTP routing now uses a dedicated server-sent event stream service
A server-sent events sample application was added
An eventsource dependency was added without component usage

files changed: 29
in a component: 13
lines in components: 261
components: 7
public routes changed: 0
schema statements: 0
new dependencies: 1
excluded by role: 16

Based on 12 of 13 eligible changed files

Server-sent event endpoints

Added

Before: SSE endpoints did not exist
After: SSE endpoints stream observables

Controllers can declare GET endpoints that stream observable messages as W3C server-sent events. The router formats event fields, opens a streaming HTTP response, and closes the subscription when the request closes.

In favour

In favour: Closes subscriptions when requests end, avoiding streams that outlive disconnected clients
In favour: Sets streaming headers that disable caching and proxy buffering

Against

Against: Declares eventsource without any component use

Inspect 12 source files behind this explanation

Files changed in 7 components (6 shown). Dependencies shown: 1 new, 2 unchanged

unchanged · 2new · 11 component added

1 new dependency between components — Core Router → Core Services

What else could behave differently

16 components · 36 files

These components import changed code, directly or through other files. A traced dependency is a place to review, not a confirmed runtime failure.

Reached 3

Component	Symbol	Cited at	Files	Reached by
Commonpackages/common/	Added `MessageEvent`1 of 2 changed symbols reaching it	packages/common/interfaces/http/http-server.interface.ts:73-78	1	1 direct Trace path Shortest component path from the changed symbol: HTTP Interfaces Common Later steps follow file imports; they do not prove this symbol is called.
Core Routerpackages/core/router/	Added `HandleResponseFn`1 of 6 changed symbols reaching it	packages/core/helpers/handler-metadata-storage.ts:9-13	4	3 direct · 1 at two steps Trace path Shortest component path from the changed symbol: Core Helpers Core Router Later steps follow file imports; they do not prove this symbol is called.
packages/common/pipes/	Added `MessageEvent`1 of 2 changed symbols reaching it	packages/common/interfaces/http/http-server.interface.ts:73-78	7	none direct · 6 at two steps · 1 at three steps Trace path Shortest component path from the changed symbol: HTTP Interfaces Common packages/common/pipes/ Later steps follow file imports; they do not prove this symbol is called.

Held back 9

Component	Files	Reached by	Resolution
packages/core/	3	none direct · 1 at three steps · 2 at four steps	precise
packages/common/utils/	1	none direct · 1 at three steps	precise
packages/common/decorators/	1	none direct · 1 at three steps	precise
packages/common/cache/	1	none direct · 1 at four steps	precise
packages/common/serializer/	1	none direct · 1 at four steps	precise
packages/common/http/	1	none direct · 1 at four steps	precise
packages/common/cache/decorators/	2	none direct · 2 at four steps	precise
packages/common/cache/interceptors/	1	none direct · 1 at four steps	precise
packages/common/serializer/decorators/	1	none direct · 1 at four steps	precise

Ranked lower 4

Component	Files	Reached by
packages/core/middleware/	4	none direct · 1 at two steps · 2 at three steps · 1 at four steps
sample/28-sse/src/	2	2 direct
packages/common/decorators/core/	2	none direct · 1 at two steps · 1 at three steps
packages/common/decorators/http/	4	1 direct · 3 at two steps

Statements 3

The added MessageEvent reached 1 file in Common. 1

http-server.interface.ts:73-78

The added HandleResponseFn reached 4 files in Core Router. 31

handler-metadata-storage.ts:9-13

The added MessageEvent reached 7 files in Common Pipes. 61

http-server.interface.ts:73-78

39 reached files belong to no component — tests, docs and config.

Routes, schema, dependencies

What	Object	Where
+ dependency	eventsource@^1.0.7	declared, and used by no file in any component

1 statement, with the line behind it

eventsource was declared, and used by no file in any component.

Inspect components, files and symbols

Component

CommonModified

packages/common/

2 files · 2 lines

5 dependents

Common exported MessageEvent and SSE_METADATA.

Core HelpersModified

packages/core/helpers/

1 file · 11 lines

9 dependents

Core Helpers exported HandleResponseFn.

Core ServicesModified

packages/core/services/

2 files · 105 lines

3 dependents

Core Services exported HeaderStream and SseStream.

Core RouterModified

packages/core/router/

2 files · 64 lines

3 dependents

SSE SampleAdded

sample/28-sse/src/

3 files · 43 lines

The SSE sample exported AppController and AppModule.

HTTP InterfacesModified

packages/common/interfaces/http/

1 file · 7 lines

3 dependents

HTTP Interfaces exported MessageEvent.

HTTP DecoratorsModified

packages/common/decorators/http/

2 files · 29 lines

2 dependents

ranked lower · 0.07

HTTP Decorators exported Sse.

File

Commonpackages/common/

constants.ts

+1 −0

Commonpackages/common/

index.ts

+1 −0

Core Helperspackages/core/helpers/

handler-metadata-storage.ts

+7 −4

Core Servicespackages/core/services/

sse-stream.service.ts

+104 −0

Core Servicespackages/core/services/

index.ts

+1 −0

Core Routerpackages/core/router/

router-response-controller.ts

+43 −1

Core Routerpackages/core/router/

router-execution-context.ts

+18 −2

SSE Samplesample/28-sse/src/

app.controller.ts

+25 −0

SSE Samplesample/28-sse/src/

app.module.ts

+9 −0

SSE Samplesample/28-sse/src/

main.ts

+9 −0

HTTP Interfacespackages/common/interfaces/http/

http-server.interface.ts

+7 −0

HTTP Decoratorspackages/common/decorators/http/

sse.decorator.ts

+28 −0

HTTP Decoratorspackages/common/decorators/http/

index.ts

+1 −0

Function

imports what changeddownstream of it, one mark per step

SSE_METADATA()constants.ts

reaches 7 components

The added SSE_METADATA reached 4 files in HTTP Decorators. 13

constants.ts:29

The added SSE_METADATA reached 1 file in Common Decorators. 1

constants.ts:29

The added SSE_METADATA reached 1 file in Common Cache. 1

constants.ts:29

The added SSE_METADATA reached 1 file in Common HTTP. 1

constants.ts:29

The added SSE_METADATA reached 2 files in Cache Decorators. 2

constants.ts:29

The added SSE_METADATA reached 1 file in Cache Interceptors. 1

constants.ts:29

The added SSE_METADATA reached 1 file in Serializer Decorators. 1

constants.ts:29

MessageEvent()http-server.interface.ts

reaches 3 components

The added MessageEvent reached 2 files in Core Decorators. 11

http-server.interface.ts:73-78

The added MessageEvent reached 1 file in Common Utils. 1

http-server.interface.ts:73-78

The added MessageEvent reached 1 file in Common Serializer. 1

http-server.interface.ts:73-78

RouterExecutionContext()router-execution-context.ts

reaches 2 components

The RouterExecutionContext signature changed and reached 4 files in Core Middleware. 121

router-execution-context.ts:56-435

The RouterExecutionContext signature changed and reached 3 files in Core. 12

router-execution-context.ts:56-435

AppController()app.controller.ts

reaches SSE Sample

The added AppController reached 2 files in the SSE sample. 2

app.controller.ts:5-25

Diff

Commonpackages/common/

constants.ts

29–29

Commonpackages/common/

index.ts

34–34

Core Helperspackages/core/helpers/

handler-metadata-storage.ts

9–14, 26–26

Core Servicespackages/core/services/

sse-stream.service.ts

1–104

Core Servicespackages/core/services/

index.ts

2–2

Core Routerpackages/core/router/

router-response-controller.ts

1–6, 8–11, 90–122

Core Routerpackages/core/router/

router-execution-context.ts

16–16, 30–30, 165–165 and 3 more spans

SSE Samplesample/28-sse/src/

app.controller.ts

1–25

SSE Samplesample/28-sse/src/

app.module.ts

1–9

SSE Samplesample/28-sse/src/

main.ts

1–9

HTTP Interfacespackages/common/interfaces/http/

http-server.interface.ts

72–78

HTTP Decoratorspackages/common/decorators/http/

sse.decorator.ts

1–28

HTTP Decoratorspackages/common/decorators/http/

index.ts

8–8

Analysis scope

1447 → 7

1,447
files at head
210
components
7
changed by this change
6
shown above of 7

Where the new files landed

5 new files

New file	Belongs to	Used by	Calls	Serves
packages/core/services/sse-stream.service.ts	Core Servicesbase frame	Core Router	nothing outside its own component	—
sample/28-sse/src/3 new files	SSE Samplenew territory	its own component only — 1 of 3 files imported by nothing	nothing outside its own component	—
packages/common/decorators/http/sse.decorator.ts	HTTP Decoratorsbase frame	its own component only	Commonpackages/common/enums/	—

12 added files carry no component — 7 config, 3 test, 1 asset, 1 docs.

7components changed

12reached, not changed

1components added/removed

1dependencies added between components

0dependencies removed between components

0files moved to another path

29 files changed, 30 claims stated. 16 components reached in total.