From de1f301d2ffe5f8a002a0d456e9f0c7015c8b2a5 Mon Sep 17 00:00:00 2001
From: Brendan Kellam <10233483+brendan-kellam@users.noreply.github.com>
Date: Tue, 30 Jun 2026 19:29:19 +0000
Subject: [PATCH 1/2] fix(backend): handle Gitea ERR_STREAM_PREMATURE_CLOSE and
 null repo data

Force identity encoding / connection close in the Gitea API fetch to avoid
cross-fetch failing to read the response body, and guard against null repo
data so a failed fetch no longer crashes on repo.full_name.

Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>
---
 packages/backend/src/gitea.ts | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/packages/backend/src/gitea.ts b/packages/backend/src/gitea.ts
index ac7566ee8..4ebdc2033 100644
--- a/packages/backend/src/gitea.ts
+++ b/packages/backend/src/gitea.ts
@@ -12,6 +12,22 @@ import { measure } from './utils.js';
 const logger = createLogger('gitea');
 const GITEA_CLOUD_HOSTNAME = "gitea.com";
 
+// Some Gitea instances (particularly when behind certain reverse proxies or with
+// response compression enabled) cause `cross-fetch` to fail while reading the
+// response body with ERR_STREAM_PREMATURE_CLOSE. Forcing identity encoding and
+// closing the connection avoids the premature close.
+// @see https://github.com/sourcebot-dev/sourcebot/issues/1404
+const customFetch: typeof fetch = (url, options = {}) => {
+    return fetch(url, {
+        ...options,
+        headers: {
+            ...(options.headers ?? {}),
+            'Accept-Encoding': 'identity',
+            'Connection': 'close',
+        },
+    });
+};
+
 export const getGiteaReposFromConfig = async (config: GiteaConnectionConfig) => {
     const hostname = config.url ?
         new URL(config.url).hostname :
@@ -25,7 +41,7 @@ export const getGiteaReposFromConfig = async (config: GiteaConnectionConfig) =>
 
     const api = giteaApi(config.url ?? 'https://gitea.com', {
         token: token,
-        customFetch: fetch,
+        customFetch,
     });
 
     let allRepos: GiteaRepository[] = [];
@@ -49,8 +65,11 @@ export const getGiteaReposFromConfig = async (config: GiteaConnectionConfig) =>
         allWarnings = allWarnings.concat(warnings);
     }
     
-    allRepos = allRepos.filter(repo => repo.full_name !== undefined);
     allRepos = allRepos.filter(repo => {
+        if (repo === null || repo === undefined) {
+            logger.warn(`Skipping null/undefined repository returned by the Gitea API`);
+            return false;
+        }
         if (repo.full_name === undefined) {
             logger.warn(`Repository with undefined full_name found: repoId=${repo.id}`);
             return false;
@@ -208,6 +227,10 @@ const getRepos = async <T>(repoList: string[], api: Api<T>) => {
                 api.repos.repoGet(owner, repoName),
             );
 
+            if (response.error || !response.data) {
+                throw response.error ?? new Error(`Received empty response body while fetching repository ${repo}`);
+            }
+
             logger.debug(`Found repo ${repo} in ${durationMs}ms.`);
             return {
                 type: 'valid' as const,

From 474b7be2a2ce28c20521e36d7bcce02467726926 Mon Sep 17 00:00:00 2001
From: Brendan Kellam <10233483+brendan-kellam@users.noreply.github.com>
Date: Tue, 30 Jun 2026 19:29:46 +0000
Subject: [PATCH 2/2] docs: add CHANGELOG entry for #1405

Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>
---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32a565fc3..333546b6f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [EE] Fixed Ask Sourcebot mermaid diagrams overflowing their container by contain-fitting them to both width and height, and made revealing a diagram from the answer jump it into view instantly to avoid over/undershooting. [#1373](https://github.com/sourcebot-dev/sourcebot/pull/1373)
 - Verified GitHub review webhook deliveries before processing them. [#1378](https://github.com/sourcebot-dev/sourcebot/pull/1378)
 - Passed Zoekt index parameters via argv to preserve revision names with punctuation. [#1376](https://github.com/sourcebot-dev/sourcebot/pull/1376)
+- Fixed Gitea sync failing with `ERR_STREAM_PREMATURE_CLOSE` by forcing identity encoding on the Gitea API fetch and guarding against null repository responses. [#1405](https://github.com/sourcebot-dev/sourcebot/pull/1405)
 
 ## [5.0.4] - 2026-06-18