From 0b85d8a9bcbe0bc7a83f7b79e3d1785d9b8c028e Mon Sep 17 00:00:00 2001
From: AveryanAlex <alex@averyan.ru>
Date: Sun, 29 Mar 2026 00:12:18 +0300
Subject: [PATCH] =?UTF-8?q?fix:=20translate=20input=5Ffile=E2=86=94file=20?=
 =?UTF-8?q?content=20parts?=
MIME-Version: 1.0
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---
 .../translator/request/openai-responses.ts    | 17 ++++++++
 .../unit/responses-translation-fixes.test.mjs | 41 +++++++++++++++++++
 2 files changed, 58 insertions(+)

diff --git a/open-sse/translator/request/openai-responses.ts b/open-sse/translator/request/openai-responses.ts
index a9fcca0331..715126044b 100644
--- a/open-sse/translator/request/openai-responses.ts
+++ b/open-sse/translator/request/openai-responses.ts
@@ -122,6 +122,14 @@ export function openaiResponsesToOpenAIRequest(
               }
               return imgResult;
             }
+            if (contentItem.type === "input_file") {
+              const fileObj: JsonRecord = {};
+              if (contentItem.file_data !== undefined) fileObj.file_data = contentItem.file_data;
+              if (contentItem.file_id !== undefined) fileObj.file_id = contentItem.file_id;
+              if (contentItem.file_url !== undefined) fileObj.file_url = contentItem.file_url;
+              if (contentItem.filename !== undefined) fileObj.filename = contentItem.filename;
+              return { type: "file", file: fileObj };
+            }
             return contentValue;
           })
         : item.content;
@@ -308,6 +316,15 @@ export function openaiToOpenAIResponsesRequest(
                   }
                   return imgResult;
                 }
+                if (contentItem.type === "file") {
+                  const file = toRecord(contentItem.file);
+                  const fileResult: JsonRecord = { type: "input_file" };
+                  if (file.file_data !== undefined) fileResult.file_data = file.file_data;
+                  if (file.file_id !== undefined) fileResult.file_id = file.file_id;
+                  if (file.file_url !== undefined) fileResult.file_url = file.file_url;
+                  if (file.filename !== undefined) fileResult.filename = file.filename;
+                  return fileResult;
+                }
                 return contentValue;
               })
             : [{ type: "input_text", text: "" }];
diff --git a/tests/unit/responses-translation-fixes.test.mjs b/tests/unit/responses-translation-fixes.test.mjs
index fd0355d5db..7c41feb9df 100644
--- a/tests/unit/responses-translation-fixes.test.mjs
+++ b/tests/unit/responses-translation-fixes.test.mjs
@@ -117,3 +117,44 @@ test("Chat→Responses: image_url without detail omits detail", () => {
   assert.ok(imgPart);
   assert.equal(imgPart.detail, undefined);
 });
+
+test("Responses→Chat: input_file converted to file content part", () => {
+  const body = {
+    model: "gpt-4",
+    input: [
+      {
+        type: "message",
+        role: "user",
+        content: [
+          { type: "input_file", file_id: "file-abc", filename: "data.csv" },
+        ],
+      },
+    ],
+  };
+  const result = openaiResponsesToOpenAIRequest(null, body, null, null);
+  const userMsg = result.messages.find((m) => m.role === "user");
+  const filePart = userMsg.content.find((c) => c.type === "file");
+  assert.ok(filePart, "should have file content part");
+  assert.equal(filePart.file.file_id, "file-abc");
+  assert.equal(filePart.file.filename, "data.csv");
+});
+
+test("Chat→Responses: file content part converted to input_file", () => {
+  const body = {
+    model: "gpt-4",
+    messages: [
+      {
+        role: "user",
+        content: [
+          { type: "file", file: { file_id: "file-abc", filename: "data.csv" } },
+        ],
+      },
+    ],
+  };
+  const result = openaiToOpenAIResponsesRequest("gpt-4", body, true, null);
+  const userItem = result.input.find((i) => i.type === "message" && i.role === "user");
+  const filePart = userItem.content.find((c) => c.type === "input_file");
+  assert.ok(filePart, "should have input_file content part");
+  assert.equal(filePart.file_id, "file-abc");
+  assert.equal(filePart.filename, "data.csv");
+});