From e237115285dc12c78f3c63b8b23dd7649af52c4a Mon Sep 17 00:00:00 2001
From: Nimo Beeren <nimobeeren@gmail.com>
Date: Tue, 24 Dec 2024 18:59:22 +0100
Subject: [PATCH 1/3] return raw response body when no content-type response
 header is provided

---
 packages/client-fetch/src/__tests__/utils.test.ts |  2 +-
 packages/client-fetch/src/index.ts                | 12 ++++++------
 packages/client-fetch/src/utils.ts                |  6 ++++--
 3 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/packages/client-fetch/src/__tests__/utils.test.ts b/packages/client-fetch/src/__tests__/utils.test.ts
index 7189f016b..74cd0c986 100644
--- a/packages/client-fetch/src/__tests__/utils.test.ts
+++ b/packages/client-fetch/src/__tests__/utils.test.ts
@@ -77,7 +77,7 @@ describe('getParseAs', () => {
   }> = [
     {
       content: null,
-      parseAs: undefined,
+      parseAs: 'stream',
     },
     {
       content: 'application/json',
diff --git a/packages/client-fetch/src/index.ts b/packages/client-fetch/src/index.ts
index 7c8193f20..31dcacd23 100644
--- a/packages/client-fetch/src/index.ts
+++ b/packages/client-fetch/src/index.ts
@@ -93,18 +93,18 @@ export const createClient = (config: Config = {}): Client => {
         };
       }
 
-      if (opts.parseAs === 'stream') {
+      const parseAs =
+        (opts.parseAs === 'auto'
+          ? getParseAs(response.headers.get('Content-Type'))
+          : opts.parseAs) ?? 'json';
+
+      if (parseAs === 'stream') {
         return {
           data: response.body,
           ...result,
         };
       }
 
-      const parseAs =
-        (opts.parseAs === 'auto'
-          ? getParseAs(response.headers.get('Content-Type'))
-          : opts.parseAs) ?? 'json';
-
       let data = await response[parseAs]();
       if (parseAs === 'json') {
         if (opts.responseValidator) {
diff --git a/packages/client-fetch/src/utils.ts b/packages/client-fetch/src/utils.ts
index c334bd6d6..fec0d26d9 100644
--- a/packages/client-fetch/src/utils.ts
+++ b/packages/client-fetch/src/utils.ts
@@ -327,9 +327,11 @@ export const createQuerySerializer = <T = unknown>({
  */
 export const getParseAs = (
   contentType: string | null,
-): Exclude<Config['parseAs'], 'auto' | 'stream'> => {
+): Exclude<Config['parseAs'], 'auto'> => {
   if (!contentType) {
-    return;
+    // If no Content-Type header is provided, the best we can do is return the raw response body,
+    // which is effectively the same as the 'stream' option.
+    return 'stream';
   }
 
   const cleanContent = contentType.split(';')[0]?.trim();

From bc77b6bb8932903744596d5b22c5e1e746573d81 Mon Sep 17 00:00:00 2001
From: Nimo Beeren <nimobeeren@gmail.com>
Date: Tue, 24 Dec 2024 18:59:37 +0100
Subject: [PATCH 2/3] remove duplicate test file

---
 packages/client-fetch/test/utils.test.ts | 66 ------------------------
 1 file changed, 66 deletions(-)
 delete mode 100644 packages/client-fetch/test/utils.test.ts

diff --git a/packages/client-fetch/test/utils.test.ts b/packages/client-fetch/test/utils.test.ts
deleted file mode 100644
index b204572be..000000000
--- a/packages/client-fetch/test/utils.test.ts
+++ /dev/null
@@ -1,66 +0,0 @@
-import { describe, expect, it } from 'vitest';
-
-import { getParseAs } from '../src/utils';
-
-describe('getParseAs', () => {
-  const scenarios: Array<{
-    content: Parameters<typeof getParseAs>[0];
-    parseAs: ReturnType<typeof getParseAs>;
-  }> = [
-    {
-      content: null,
-      parseAs: undefined,
-    },
-    {
-      content: 'application/json',
-      parseAs: 'json',
-    },
-    {
-      content: 'application/ld+json',
-      parseAs: 'json',
-    },
-    {
-      content: 'application/ld+json;charset=utf-8',
-      parseAs: 'json',
-    },
-    {
-      content: 'application/ld+json; charset=utf-8',
-      parseAs: 'json',
-    },
-    {
-      content: 'multipart/form-data',
-      parseAs: 'formData',
-    },
-    {
-      content: 'application/*',
-      parseAs: 'blob',
-    },
-    {
-      content: 'audio/*',
-      parseAs: 'blob',
-    },
-    {
-      content: 'image/*',
-      parseAs: 'blob',
-    },
-    {
-      content: 'video/*',
-      parseAs: 'blob',
-    },
-    {
-      content: 'text/*',
-      parseAs: 'text',
-    },
-    {
-      content: 'unsupported',
-      parseAs: undefined,
-    },
-  ];
-
-  it.each(scenarios)(
-    'detects $content as $parseAs',
-    async ({ content, parseAs }) => {
-      expect(getParseAs(content)).toEqual(parseAs);
-    },
-  );
-});

From e2e1410b22c0c84c40d1b1803e9650d546350cb7 Mon Sep 17 00:00:00 2001
From: Nimo Beeren <nimobeeren@gmail.com>
Date: Tue, 24 Dec 2024 20:19:25 +0100
Subject: [PATCH 3/3] add changeset

---
 .changeset/wise-poets-flow.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/wise-poets-flow.md

diff --git a/.changeset/wise-poets-flow.md b/.changeset/wise-poets-flow.md
new file mode 100644
index 000000000..129ec1830
--- /dev/null
+++ b/.changeset/wise-poets-flow.md
@@ -0,0 +1,5 @@
+---
+'@hey-api/client-fetch': minor
+---
+
+[BREAKING] return raw response body (of type `ReadableStream`) when `Content-Type` response header is not provided and `parseAs` is set to `auto`