Sourcegraph Stream API

With the Stream API you can consume search results and related metadata as a stream of events. The Sourcegraph UI calls the Stream API for all interactive searches. Compared to our GraphQL API, it offers shorter times to first results and supports running exhaustive searches returning a large volume of results without putting pressure on the backend.

Endpoint

/.api/search/stream

Request

BASH
curl --header "Accept: text/event-stream" \
     --header "Authorization: token <access token>" \
     --get \
     --url "<Sourcegraph URL>/.api/search/stream" \
     --data-urlencode "q=<query>" \
     --data-urlencode "v=<version>" \
     --data-urlencode "t=<pattern type>" \
     --data-urlencode "max-line-len=<maximum line length>" \
     --data-urlencode "cm=<enable chunk matches>" \
     --data-urlencode "display=<display limit>" \
     --data-urlencode "cl=<context lines>"

Parameter	Description
access token	Sourcegraph access token
Sourcegraph URL	The URL of your Sourcegraph instance, or https://sourcegraph.com.
query	A Sourcegraph query string, see our search query syntax
version (optional)	The version of the search query syntax. We recommend to explicitly set the version. The latest version is "V3". (Default: "V3")
pattern type (optional)	Either "keyword", "standard", or "regexp". This pattern type is only used if the query doesn't already contain a `patternType:` filter. (Default: "standard")
maximum line length (optional)	If set, will truncate the context field of `ChunkMatch` such that no line is longer than max-line-len. (Default: -1 (no limit))
enable chunk matches (optional)	Enables chunk matches. Must be parseable as boolean. (Default: false)
display limit (optional)	The maximum number of matches the backend returns. If the backend finds more than display-limit results, it will keep searching and aggregating statistics, but the matches will not be returned anymore. Note that the display-limit is different from the query filter `count:` which causes the search to stop and return once we found `count:` matches. (Default: -1 (no limit))
context lines (optional)	The number of lines around a match that should be returned. Works only in conjunction with `cm=true`. Must be parseable as boolean. (Default: 1)

See Example.

Event stream format

The API responds with a stream of events. Each event consists of exactly two fields, event and data, one per line. Events are separated by 2 newline characters, \n\n. The value of event: is always a string that describes the type of the event. The value of data: is always JSON.

TEXT
event: <event-type> // event 1
data: <JSON>

event: <event-type> // event 2
data: <JSON>

...

event: done // last event
data: {}

NOTE: The search stream API follows the server-sent events format. However, we do not guarantee compatibility with any third-party clients written for server-sent events, and recommend using the src-cli tool or writing your own wrapper around the API.

Event-types

Events can be of the following types:

event-type	description
matches	matches can be of type content, path, commit, diff, symbol and repo
progress	statistics such as match count, count of repositories with matches, and duration
filters	suggestions for additional filters to further narrow down the search
alert	info, warning and error messages
done	always the last event

Example (curl)

On Sourcegraph.com we can run queries without authentication.

SHELLSESSION
$ curl --header "Accept: text/event-stream" \
     --get \
     --url "https://sourcegraph.com/.api/search/stream" \
     --data-urlencode "q=r:sourcegraph/sourcegraph stream results patternType:keyword count:1" \
     --data-urlencode "v=V3"
 
 
event: filters
data: [{"value":"archived:yes","label":"Include archived repos","count":15,"exhaustive":false,"kind":"utility"}]
 
event: progress
data: {"done":false,"matchCount":0,"durationMs":206,"skipped":[{"reason":"excluded-archive","title":"15 archived","message":"By default we exclude archived repositories. Include them with `archived:yes` in your query.","severity":"info","suggested":{"title":"include archived","queryExpression":"archived:yes"}}],"trace":"https://sourcegraph.com/-/debug/jaeger/trace/b1be66f71a79e0dbeda6bb200dae8326"}
 
event: filters
data: [{"value":"archived:yes","label":"Include archived repos","count":15,"exhaustive":false,"kind":"utility"},{"value":"type:file","label":"Code","count":1,"exhaustive":false,"kind":"type"},{"value":"type:path","label":"Paths","count":1,"exhaustive":false,"kind":"type"},{"value":"lang:go","label":"Go","count":1,"exhaustive":false,"kind":"lang"},{"value":"repo:^github\\.com/sourcegraph/sourcegraph$","label":"github.com/sourcegraph/sourcegraph","count":1,"exhaustive":false,"kind":"repo"}]
 
event: matches
data: [{"type":"content","path":"cmd/frontend/graphqlbackend/search_results.go","pathMatches":[{"start":{"offset":35,"line":0,"column":35},"end":{"offset":42,"line":0,"column":42}}],"repositoryID":36809250,"repository":"github.com/sourcegraph/sourcegraph","repoStars":9918,"repoLastFetched":"2024-07-11T13:40:33.306273Z","branches":[""],"commit":"be0cd097f5f20d1444786ed7bb6c34cbad85c676","hunks":null,"lineMatches":[{"line":"// Results are the results found by the search. It respects the limits set. To","lineNumber":124,"offsetAndLengths":[[3,7]]}],"language":"Go"}]
 
event: filters
data: [{"value":"archived:yes","label":"Include archived repos","count":15,"exhaustive":false,"kind":"utility"},{"value":"type:file","label":"Code","count":1,"exhaustive":false,"kind":"type"},{"value":"type:path","label":"Paths","count":1,"exhaustive":false,"kind":"type"},{"value":"lang:go","label":"Go","count":1,"exhaustive":false,"kind":"lang"},{"value":"repo:^github\\.com/sourcegraph/sourcegraph$","label":"github.com/sourcegraph/sourcegraph","count":1,"exhaustive":false,"kind":"repo"}]
 
event: progress
data: {"done":true,"repositoriesCount":1,"matchCount":1,"durationMs":359,"skipped":[{"reason":"shard-match-limit","title":"result limit hit","message":"Not all results have been returned due to hitting a match limit. Sourcegraph has limits for the number of results returned from a line, document and repository.","severity":"info","suggested":{"title":"increase limit","queryExpression":"count:1000"}},{"reason":"excluded-archive","title":"15 archived","message":"By default we exclude archived repositories. Include them with `archived:yes` in your query.","severity":"info","suggested":{"title":"include archived","queryExpression":"archived:yes"}}],"trace":"https://sourcegraph.com/-/debug/jaeger/trace/b1be66f71a79e0dbeda6bb200dae8326"}
 
event: done
data: {}

FAQ

Q: How can I run an exhaustive search directly against the Stream API?

To search a pattern over all indexed repositories, add count:all and remove all repo filters. For example, to search all indexed repositories for the string "secret", you can run the following command

BASH
curl --header "Accept:text/event-stream" --get --url "https://sourcegraph.com/.api/search/stream" --data-urlencode "q=secret count:all"

If you don't want to write your own client, you can also use Sourcegraph's src-cli.

BASH
src search -stream "secret count:all"

Q: Are there plans for supporting a streaming client or interface with more functionality (e.g., parallelizing multiple streaming requests or aggregating results from multiple streams)?

There are currently no plans to support additional client-side functionality to interact with a streaming endpoint. We recommend users write their own scripts or client wrappers that handle, e.g., firing multiple requests, accepting and aggregating the return values, and additional result formatting or processing.