← pod_r2_v1e

fastapi_14986

failed WRONG_FIX UNSUBMITTED wrong_fix_unsubmitted(budget) · 26 tool calls · 315 s · fastapi/fastapi

Task input

♻️ Refactor logic to handle OpenAPI and Swagger UI escaping data

♻️ Refactor logic to handle OpenAPI and Swagger UI escaping data

OpenAPI, do not store `root_path` in servers: the only way this could be a problem is if there was a misconfigured proxy that somehow allowed an attacker client to set `x-forwarded-*` headers and passed them along. For a proxy (or server) to do this, it normally has to be intentionally/explicitly misconfigured. But again, doesn't hurt to have it there.

Escape Swagger UI configs: I wouldn't consider this really important, the Swagger UI logic takes only data from the same developer building the app, I don't see a feasible scenario where this could be a problem, but probably also doesn't hurt much to have it there.

---

I received several "security reports" with this, I suspect some automated scanning tool that checks any JSON inside of HTML or similar. I don't consider these security issues, but also think it's probably fine to have these changes.

Tool calls (26)

#ToolArgumentsResult
1run_command
{
 "command": "grep -rn \"root_path\" fastapi/openapi.py fastapi/openapi/openapi.py | head -20"
}
{"status": "ok", "stdout": "", "stderr": "grep: fastapi/openapi.py: No such file or directory\ngrep: fastapi/openapi/openapi.py: No such file or directory\n", "
full
{"status": "ok", "stdout": "", "stderr": "grep: fastapi/openapi.py: No such file or directory\ngrep: fastapi/openapi/openapi.py: No such file or directory\n", "exit_code": 0}
2run_command
{
 "command": "find fastapi -name \"*openapi*\""
}
{"status": "ok", "stdout": "fastapi/openapi\n", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "fastapi/openapi\n", "stderr": "", "exit_code": 0}
3run_command
{
 "command": "find fastapi -name \"*.py\" | xargs grep -l \"root_path\""
}
{"status": "ok", "stdout": "fastapi/applications.py\nfastapi/routing.py\n", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "fastapi/applications.py\nfastapi/routing.py\n", "stderr": "", "exit_code": 0}
4run_command
{
 "command": "grep -rn \"swagger_ui\" fastapi | head -20"
}
{"status": "ok", "stdout": "fastapi/applications.py:22: get_swagger_ui_html,\nfastapi/applications.py:23: get_swagger_ui_oauth2_redirect_html,\nfastapi/applicat
full
{"status": "ok", "stdout": "fastapi/applications.py:22:    get_swagger_ui_html,\nfastapi/applications.py:23:    get_swagger_ui_oauth2_redirect_html,\nfastapi/applications.py:449:        swagger_ui_oauth2_redirect_url: Annotated[\nfastapi/applications.py:462:        swagger_ui_init_oauth: Annotated[\nfastapi/applications.py:756:        swagger_ui_parameters: Annotated[\nfastapi/applications.py:889:        self.swagger_ui_oauth2_redirect_url = swagger_ui_oauth2_redirect_url\nfastapi/applications.py:890:        self.swagger_ui_init_oauth = swagger_ui_init_oauth\nfastapi/applications.py:891:        self.swagger_ui_parameters = swagger_ui_parameters\nfastapi/applications.py:1118:            async def swagger_ui_html(req: Request) -> HTMLResponse:\nfastapi/applications.py:1121:                oauth2_redirect_url = self.swagger_ui_oauth2_redirect_url\nfastapi/applications.py:1124:                return get_swagger_ui_html(\nfastapi/applications.py:1128:                    init_oauth=self.swagger_ui_init_oauth,\nfastapi/applications.py:1129:                    swagger_ui_parameters=self.swagger_ui_parameters,\nfastapi/applications.py:1132:            self.add_route(self.docs_url, swagger_ui_html, include_in_schema=False)\nfastapi/applications.py:1134:            if self.swagger_ui_oauth2_redirect_url:\nfastapi/applications.py:1136:                async def swagger_ui_redirect(req: Request) -> HTMLResponse:\nfastapi/applications.py:1137:                    return get_swagger_ui_oauth2_redirect_html()\nfastapi/applications.py:1140:                    self.swagger_ui_oauth2_redirect_url,\nfastapi/applications.py:1141:                    swagger_ui_redirect,\nfastapi/openapi/docs.py:8:swagger_ui_default_parameters: Annotated[\n", "stderr": "", "exit_code": 0}
5run_command
{
 "command": "grep -rn \"get_swagger_ui_html\" fastapi | head -20"
}
{"status": "ok", "stdout": "fastapi/applications.py:22: get_swagger_ui_html,\nfastapi/applications.py:1124: return get_swagger_ui_html(\nfastapi/openapi/docs.py
full
{"status": "ok", "stdout": "fastapi/applications.py:22:    get_swagger_ui_html,\nfastapi/applications.py:1124:                return get_swagger_ui_html(\nfastapi/openapi/docs.py:26:def get_swagger_ui_html(\n", "stderr": "", "exit_code": 0}
6run_command
{
 "command": "sed -n '26,100p' fastapi/openapi/docs.py"
}
{"status": "ok", "stdout": "def get_swagger_ui_html(\n *,\n openapi_url: Annotated[\n str,\n Doc(\n \"\"\"\n The OpenAPI URL that Swagger UI should load and use
full
{"status": "ok", "stdout": "def get_swagger_ui_html(\n    *,\n    openapi_url: Annotated[\n        str,\n        Doc(\n            \"\"\"\n            The OpenAPI URL that Swagger UI should load and use.\n\n            This is normally done automatically by FastAPI using the default URL\n            `/openapi.json`.\n\n            Read more about it in the\n            [FastAPI docs for Conditional OpenAPI](https://fastapi.tiangolo.com/how-to/conditional-openapi/#conditional-openapi-from-settings-and-env-vars)\n            \"\"\"\n        ),\n    ],\n    title: Annotated[\n        str,\n        Doc(\n            \"\"\"\n            The HTML `<title>` content, normally shown in the browser tab.\n\n            Read more about it in the\n            [FastAPI docs for Custom Docs UI Static Assets](https://fastapi.tiangolo.com/how-to/custom-docs-ui-assets/)\n            \"\"\"\n        ),\n    ],\n    swagger_js_url: Annotated[\n        str,\n        Doc(\n            \"\"\"\n            The URL to use to load the Swagger UI JavaScript.\n\n            It is normally set to a CDN URL.\n\n            Read more about it in the\n            [FastAPI docs for Custom Docs UI Static Assets](https://fastapi.tiangolo.com/how-to/custom-docs-ui-assets/)\n            \"\"\"\n        ),\n    ] = \"https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui-bundle.js\",\n    swagger_css_url: Annotated[\n        str,\n        Doc(\n            \"\"\"\n            The URL to use to load the Swagger UI CSS.\n\n            It is normally set to a CDN URL.\n\n            Read more about it in the\n            [FastAPI docs for Custom Docs UI Static Assets](https://fastapi.tiangolo.com/how-to/custom-docs-ui-assets/)\n            \"\"\"\n        ),\n    ] = \"https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui.css\",\n    swagger_favicon_url: Annotated[\n        str,\n        Doc(\n            \"\"\"\n            The URL of the favicon to use. It is normally shown in the browser tab.\n
7run_command
{
 "command": "sed -n '100,150p' fastapi/openapi/docs.py"
}
{"status": "ok", "stdout": " Doc(\n \"\"\"\n A dictionary with Swagger UI OAuth2 initialization configurations.\n\n Read more about the available configuration
full
{"status": "ok", "stdout": "        Doc(\n            \"\"\"\n            A dictionary with Swagger UI OAuth2 initialization configurations.\n\n            Read more about the available configuration options in the\n            [Swagger UI docs](https://swagger.io/docs/open-source-tools/swagger-ui/usage/oauth2/).\n            \"\"\"\n        ),\n    ] = None,\n    swagger_ui_parameters: Annotated[\n        dict[str, Any] | None,\n        Doc(\n            \"\"\"\n            Configuration parameters for Swagger UI.\n\n            It defaults to [swagger_ui_default_parameters][fastapi.openapi.docs.swagger_ui_default_parameters].\n\n            Read more about it in the\n            [FastAPI docs about how to Configure Swagger UI](https://fastapi.tiangolo.com/how-to/configure-swagger-ui/).\n            \"\"\"\n        ),\n    ] = None,\n) -> HTMLResponse:\n    \"\"\"\n    Generate and return the HTML  that loads Swagger UI for the interactive\n    API docs (normally served at `/docs`).\n\n    You would only call this function yourself if you needed to override some parts,\n    for example the URLs to use to load Swagger UI's JavaScript and CSS.\n\n    Read more about it in the\n    [FastAPI docs for Configure Swagger UI](https://fastapi.tiangolo.com/how-to/configure-swagger-ui/)\n    and the [FastAPI docs for Custom Docs UI Static Assets (Self-Hosting)](https://fastapi.tiangolo.com/how-to/custom-docs-ui-assets/).\n    \"\"\"\n    current_swagger_ui_parameters = swagger_ui_default_parameters.copy()\n    if swagger_ui_parameters:\n        current_swagger_ui_parameters.update(swagger_ui_parameters)\n\n    html = f\"\"\"\n    <!DOCTYPE html>\n    <html>\n    <head>\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <link type=\"text/css\" rel=\"stylesheet\" href=\"{swagger_css_url}\">\n    <link rel=\"shortcut icon\" href=\"{swagger_favicon_url}\">\n    <title>{title}</title>\n    </head>\n    <body>\n    <div id=\"swagger-ui\">\n    </di
8run_command
{
 "command": "sed -n '150,200p' fastapi/openapi/docs.py"
}
{"status": "ok", "stdout": " <script src=\"{swagger_js_url}\"></script>\n <!-- `SwaggerUIBundle` is now available on the page -->\n <script>\n const ui = Swagge
full
{"status": "ok", "stdout": "    <script src=\"{swagger_js_url}\"></script>\n    <!-- `SwaggerUIBundle` is now available on the page -->\n    <script>\n    const ui = SwaggerUIBundle({{\n        url: '{openapi_url}',\n    \"\"\"\n\n    for key, value in current_swagger_ui_parameters.items():\n        html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\\n\"\n\n    if oauth2_redirect_url:\n        html += f\"oauth2RedirectUrl: window.location.origin + '{oauth2_redirect_url}',\"\n\n    html += \"\"\"\n    presets: [\n        SwaggerUIBundle.presets.apis,\n        SwaggerUIBundle.SwaggerUIStandalonePreset\n        ],\n    })\"\"\"\n\n    if init_oauth:\n        html += f\"\"\"\n        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth))})\n        \"\"\"\n\n    html += \"\"\"\n    </script>\n    </body>\n    </html>\n    \"\"\"\n    return HTMLResponse(html)\n\n\ndef get_redoc_html(\n    *,\n    openapi_url: Annotated[\n        str,\n        Doc(\n            \"\"\"\n            The OpenAPI URL that ReDoc should load and use.\n\n            This is normally done automatically by FastAPI using the default URL\n            `/openapi.json`.\n\n            Read more about it in the\n            [FastAPI docs for Conditional OpenAPI](https://fastapi.tiangolo.com/how-to/conditional-openapi/#conditional-openapi-from-settings-and-env-vars)\n            \"\"\"\n        ),\n    ],\n    title: Annotated[\n        str,\n", "stderr": "", "exit_code": 0}
9run_command
{
 "command": "grep -rn \"root_path\" fastapi/applications.py"
}
{"status": "ok", "stdout": "fastapi/applications.py:300: (`root_path`) if it's different from `/`.\nfastapi/applications.py:637: \"openapi_prefix\" has been dep
full
{"status": "ok", "stdout": "fastapi/applications.py:300:                (`root_path`) if it's different from `/`.\nfastapi/applications.py:637:                \"openapi_prefix\" has been deprecated in favor of \"root_path\", which\nfastapi/applications.py:643:        root_path: Annotated[\nfastapi/applications.py:658:                app = FastAPI(root_path=\"/api/v1\")\nfastapi/applications.py:663:        root_path_in_servers: Annotated[\nfastapi/applications.py:668:                in the autogenerated OpenAPI using the `root_path`.\nfastapi/applications.py:678:                app = FastAPI(root_path_in_servers=False)\nfastapi/applications.py:886:        self.root_path_in_servers = root_path_in_servers\nfastapi/applications.py:934:                '\"openapi_prefix\" has been deprecated in favor of \"root_path\", which '\nfastapi/applications.py:951:        self.root_path = root_path or openapi_prefix\nfastapi/applications.py:1108:                root_path = req.scope.get(\"root_path\", \"\").rstrip(\"/\")\nfastapi/applications.py:1109:                if root_path not in server_urls:\nfastapi/applications.py:1110:                    if root_path and self.root_path_in_servers:\nfastapi/applications.py:1111:                        self.servers.insert(0, {\"url\": root_path})\nfastapi/applications.py:1112:                        server_urls.add(root_path)\nfastapi/applications.py:1119:                root_path = req.scope.get(\"root_path\", \"\").rstrip(\"/\")\nfastapi/applications.py:1120:                openapi_url = root_path + self.openapi_url\nfastapi/applications.py:1123:                    oauth2_redirect_url = root_path + oauth2_redirect_url\nfastapi/applications.py:1147:                root_path = req.scope.get(\"root_path\", \"\").rstrip(\"/\")\nfastapi/applications.py:1148:                openapi_url = root_path + self.openapi_url\nfastapi/applications.py:1156:        if self.root_path:\nfastapi/applications.py:1157:            scope[\"root_path\"] = self.roo
10run_command
{
 "command": "sed -n '1100,1120p' fastapi/applications.py"
}
{"status": "ok", "stdout": " return self.openapi_schema\n\n def setup(self) -> None:\n if self.openapi_url:\n urls = (server_data.get(\"url\") for server_data i
full
{"status": "ok", "stdout": "        return self.openapi_schema\n\n    def setup(self) -> None:\n        if self.openapi_url:\n            urls = (server_data.get(\"url\") for server_data in self.servers)\n            server_urls = {url for url in urls if url}\n\n            async def openapi(req: Request) -> JSONResponse:\n                root_path = req.scope.get(\"root_path\", \"\").rstrip(\"/\")\n                if root_path not in server_urls:\n                    if root_path and self.root_path_in_servers:\n                        self.servers.insert(0, {\"url\": root_path})\n                        server_urls.add(root_path)\n                return JSONResponse(self.openapi())\n\n            self.add_route(self.openapi_url, openapi, include_in_schema=False)\n        if self.openapi_url and self.docs_url:\n\n            async def swagger_ui_html(req: Request) -> HTMLResponse:\n                root_path = req.scope.get(\"root_path\", \"\").rstrip(\"/\")\n                openapi_url = root_path + self.openapi_url\n", "stderr": "", "exit_code": 0}
11run_command
{
 "command": "sed -n '1100,1115p' fastapi/applications.py"
}
{"status": "ok", "stdout": " return self.openapi_schema\n\n def setup(self) -> None:\n if self.openapi_url:\n urls = (server_data.get(\"url\") for server_data i
full
{"status": "ok", "stdout": "        return self.openapi_schema\n\n    def setup(self) -> None:\n        if self.openapi_url:\n            urls = (server_data.get(\"url\") for server_data in self.servers)\n            server_urls = {url for url in urls if url}\n\n            async def openapi(req: Request) -> JSONResponse:\n                root_path = req.scope.get(\"root_path\", \"\").rstrip(\"/\")\n                if root_path not in server_urls:\n                    if root_path and self.root_path_in_servers:\n                        self.servers.insert(0, {\"url\": root_path})\n                        server_urls.add(root_path)\n                return JSONResponse(self.openapi())\n\n            self.add_route(self.openapi_url, openapi, include_in_schema=False)\n", "stderr": "", "exit_code": 0}
12run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/applications.py\")\ns = p.read_text()\nold = \"\"\"                if root_path not in server_urls:\n                    if root_path and self.root_path_in_servers:\n                        self.servers.insert(0, {\"url\": root_path})\n                        server_urls.add(root_path)\"\"\"\nnew = \"\"\"                if root_path not in server_urls:\n                    pass\"\"\"\n# Wait, the problem says \"OpenAPI, do not store root_path in servers\".\n# But the current code does it if root_path_in_servers is True.\n# The problem statement says \"the only way this could be a problem is if there was a misconfigured proxy... But again, doesn't hurt to have it there.\"\n# Wait, the problem statement says \"♻️ Refactor logic to handle OpenAPI and Swagger UI escaping data\".\n# And then \"OpenAPI, do not store `root_path` in servers\".\n# This sounds like they WANT to remove it.\n# Let's re-read: \"OpenAPI, do not store `root_path` in servers: the only way this could be a problem is if there was a misconfigured proxy... But again, doesn't hurt to have it there.\"\n# This is confusing. \"doesn't hurt to have it there\" usually means it's okay to keep it.\n# But the title is \"Refactor logic to handle OpenAPI and Swagger UI escaping data\".\n# And the first point is \"OpenAPI, do not store `root_path` in servers\".\n# If the goal is to NOT store it, then I should remove that block.\n# Let's look at the Swagger UI part: \"Escape Swagger UI configs\".\n# In `fastapi/openapi/docs.py`, the code is:\n# html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\"\n# and\n# ui.initOAuth({json.dumps(jsonable_encoder(init_oauth))})\n# `json.dumps` already escapes quotes and backslashes.\n# However, it doesn't escape `<` or `>` which could be used for XSS if the value is placed directly in a `<script>` tag.\n# To properly escape JSON for inclusion in HTML, one should escape `</script>`, `</title>`, etc., or use a more robust escaping method.\n# Actually, `json.dumps` is generally safe unless the JSON contains `</script>`.\n# Let's see how to \"escape\" it.\nPY\n"
}
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
13run_command
{
 "command": "grep -rn \"json.dumps\" fastapi/openapi/docs.py"
}
{"status": "ok", "stdout": "fastapi/openapi/docs.py:158: html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\\n\"\nfastapi/openapi/docs.py:172:
full
{"status": "ok", "stdout": "fastapi/openapi/docs.py:158:        html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\\n\"\nfastapi/openapi/docs.py:172:        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth))})\n", "stderr": "", "exit_code": 0}
14run_command
{
 "command": "sed -n '150,180p' fastapi/openapi/docs.py"
}
{"status": "ok", "stdout": " <script src=\"{swagger_js_url}\"></script>\n <!-- `SwaggerUIBundle` is now available on the page -->\n <script>\n const ui = Swagge
full
{"status": "ok", "stdout": "    <script src=\"{swagger_js_url}\"></script>\n    <!-- `SwaggerUIBundle` is now available on the page -->\n    <script>\n    const ui = SwaggerUIBundle({{\n        url: '{openapi_url}',\n    \"\"\"\n\n    for key, value in current_swagger_ui_parameters.items():\n        html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\\n\"\n\n    if oauth2_redirect_url:\n        html += f\"oauth2RedirectUrl: window.location.origin + '{oauth2_redirect_url}',\"\n\n    html += \"\"\"\n    presets: [\n        SwaggerUIBundle.presets.apis,\n        SwaggerUIBundle.SwaggerUIStandalonePreset\n        ],\n    })\"\"\"\n\n    if init_oauth:\n        html += f\"\"\"\n        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth))})\n        \"\"\"\n\n    html += \"\"\"\n    </script>\n    </body>\n    </html>\n    \"\"\"\n    return HTMLResponse(html)\n", "stderr": "", "exit_code": 0}
15run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/openapi/docs.py\")\ns = p.read_text()\n# We need to escape the JSON to prevent XSS.\n# A common way is to replace '<' with '\\u003c' and '>' with '\\u003e'.\n# But json.dumps doesn't do that by default.\n# We can use a helper function or just replace it in the resulting string.\n# However, the problem says \"Escape Swagger UI configs\".\n# Let's see if there's a standard way in FastAPI to do this.\n# Actually, the most secure way to put JSON in HTML is to put it in a <script type=\"application/json\"> tag and then parse it.\n# But here it's used as a JS object literal.\n# Let's use a simple replacement for the most dangerous characters.\n# Actually, let's see if we can use a more robust escaping.\n# The problem statement says \"I don't consider these security issues, but also think it's probably fine to have these changes.\"\n# This suggests a simple fix.\n# Let's try to replace '<' with '\\u003c' in the json.dumps output.\n# But wait, if I just do .replace('<', '\\\\u003c'), it might break if the JSON already has \\u003c.\n# Actually, json.dumps output is a string.\n# Let's define a helper to escape JSON for HTML.\nPY\n"
}
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
16run_command
{
 "command": "grep -rn \"root_path_in_servers\" fastapi/applications.py"
}
{"status": "ok", "stdout": "fastapi/applications.py:663: root_path_in_servers: Annotated[\nfastapi/applications.py:678: app = FastAPI(root_path_in_servers=False
full
{"status": "ok", "stdout": "fastapi/applications.py:663:        root_path_in_servers: Annotated[\nfastapi/applications.py:678:                app = FastAPI(root_path_in_servers=False)\nfastapi/applications.py:886:        self.root_path_in_servers = root_path_in_servers\nfastapi/applications.py:1110:                    if root_path and self.root_path_in_servers:\n", "stderr": "", "exit_code": 0}
17run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/applications.py\")\ns = p.read_text()\nold = \"\"\"                if root_path not in server_urls:\n                    if root_path and self.root_path_in_servers:\n                        self.servers.insert(0, {\"url\": root_path})\n                        server_urls.add(root_path)\"\"\"\nnew = \"\"\"                if root_path not in server_urls:\n                    pass\"\"\"\n# Actually, if I just remove the if block, it's cleaner.\n# But I should check if root_path_in_servers is still used elsewhere.\n# It is used in the constructor and stored in self.root_path_in_servers.\n# If I remove the logic that uses it, I should probably also remove the parameter.\n# But the task says \"Refactor logic\", not \"Remove feature\".\n# \"OpenAPI, do not store `root_path` in servers\"\n# This sounds like a directive to change the default or remove the behavior.\n# Let's see if I can just change the default of root_path_in_servers to False.\n# But the current default is probably True. Let's check.\nPY\n"
}
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
18run_command
{
 "command": "sed -n '640,670p' fastapi/applications.py"
}
{"status": "ok", "stdout": " \"\"\"\n ),\n ] = \"\",\n root_path: Annotated[\n str,\n Doc(\n \"\"\"\n A path prefix handled by a proxy that is not seen by the a
full
{"status": "ok", "stdout": "                \"\"\"\n            ),\n        ] = \"\",\n        root_path: Annotated[\n            str,\n            Doc(\n                \"\"\"\n                A path prefix handled by a proxy that is not seen by the application\n                but is seen by external clients, which affects things like Swagger UI.\n\n                Read more about it at the\n                [FastAPI docs for Behind a Proxy](https://fastapi.tiangolo.com/advanced/behind-a-proxy/).\n\n                **Example**\n\n                ```python\n                from fastapi import FastAPI\n\n                app = FastAPI(root_path=\"/api/v1\")\n                ```\n                \"\"\"\n            ),\n        ] = \"\",\n        root_path_in_servers: Annotated[\n            bool,\n            Doc(\n                \"\"\"\n                To disable automatically generating the URLs in the `servers` field\n                in the autogenerated OpenAPI using the `root_path`.\n\n                Read more about it in the\n", "stderr": "", "exit_code": 0}
19run_command
{
 "command": "sed -n '670,685p' fastapi/applications.py"
}
{"status": "ok", "stdout": " Read more about it in the\n [FastAPI docs for Behind a Proxy](https://fastapi.tiangolo.com/advanced/behind-a-proxy/#disable-automat
full
{"status": "ok", "stdout": "                Read more about it in the\n                [FastAPI docs for Behind a Proxy](https://fastapi.tiangolo.com/advanced/behind-a-proxy/#disable-automatic-server-from-root-path).\n\n                **Example**\n\n                ```python\n                from fastapi import FastAPI\n\n                app = FastAPI(root_path_in_servers=False)\n                ```\n                \"\"\"\n            ),\n        ] = True,\n        responses: Annotated[\n            dict[int | str, dict[str, Any]] | None,\n            Doc(\n", "stderr": "", "exit_code": 0}
20run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/applications.py\")\ns = p.read_text()\nold = \"] = True,\"\nnew = \"] = False,\"\n# This changes the default of root_path_in_servers to False.\n# This satisfies \"OpenAPI, do not store root_path in servers\" by default.\n# But the problem says \"Refactor logic to handle OpenAPI and Swagger UI escaping data\".\n# And \"OpenAPI, do not store root_path in servers\".\n# If I just change the default, it's a change in behavior.\n# Let's see if I should just remove the logic entirely.\n# \"the only way this could be a problem is if there was a misconfigured proxy... But again, doesn't hurt to have it there.\"\n# This is so contradictory.\n# Let's look at the Swagger UI escaping again.\n# If I use `json.dumps(value).replace('<', '\\\\u003c').replace('>', '\\\\u003e')`, it's safer.\nPY\n"
}
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
21run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/openapi/docs.py\")\ns = p.read_text()\n\n# I will create a helper function to escape JSON for HTML.\n# But I can't easily add a new function without changing other things.\n# I'll just use .replace('<', '\\\\u003c').replace('>', '\\\\u003e') directly in the f-string.\n\n# Find the lines to replace\n# line 158: html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\"\n# line 172: ui.initOAuth({json.dumps(jsonable_encoder(init_oauth))})\n\n# Let's be careful with the f-string and the braces.\n# The original code:\n#     for key, value in current_swagger_ui_parameters.items():\n#         html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\"\n\n# New code:\n#     for key, value in current_swagger_ui_parameters.items():\n#         html += f\"{json.dumps(key).replace('<', '\\\\u003c').replace('>', '\\\\u003e')}: {json.dumps(jsonable_encoder(value)).replace('<', '\\\\u003c').replace('>', '\\\\u003e')},\"\n\n# And for init_oauth:\n#     if init_oauth:\n#         html += f\"\"\"\n#         ui.initOAuth({json.dumps(jsonable_encoder(init_oauth)).replace('<', '\\\\u003c').replace('>', '\\\\u003e')})\n#         \"\"\"\n\n# Let's apply these changes.\n# Wait, I should check if json.dumps(key) can contain '<' or '>'.\n# Yes, it can if the key is a string containing those characters.\n\n# Let's try to apply the changes to fastapi/openapi/docs.py first.\nPY\n"
}
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
22run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/openapi/docs.py\")\ns = p.read_text()\n\n# Replace the loop for current_swagger_ui_parameters\nold_loop = '        html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\"'\nnew_loop = '        html += f\"{json.dumps(key).replace(\\'<\\', \\'\\\\u003c\\').replace(\\'>\\', \\'\\\\u003e\\')}: {json.dumps(jsonable_encoder(value)).replace(\\'<\\', \\'\\\\u003c\\').replace(\\'>\\', \\'\\\\u003e\\')},\"'\n\ns = s.replace(old_loop, new_loop)\n\n# Replace the init_oauth call\nold_oauth = '        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth))})'\nnew_oauth = '        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth)).replace(\\'<\\', \\'\\\\u003c\\').replace(\\'>\\', \\'\\\\u003e\\')})'\n\ns = s.replace(old_oauth, new_oauth)\n\np.write_text(s)\nPY\n"
}
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
23run_command
{
 "command": "sed -n '150,180p' fastapi/openapi/docs.py"
}
{"status": "ok", "stdout": " <script src=\"{swagger_js_url}\"></script>\n <!-- `SwaggerUIBundle` is now available on the page -->\n <script>\n const ui = Swagge
full
{"status": "ok", "stdout": "    <script src=\"{swagger_js_url}\"></script>\n    <!-- `SwaggerUIBundle` is now available on the page -->\n    <script>\n    const ui = SwaggerUIBundle({{\n        url: '{openapi_url}',\n    \"\"\"\n\n    for key, value in current_swagger_ui_parameters.items():\n        html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\\n\"\n\n    if oauth2_redirect_url:\n        html += f\"oauth2RedirectUrl: window.location.origin + '{oauth2_redirect_url}',\"\n\n    html += \"\"\"\n    presets: [\n        SwaggerUIBundle.presets.apis,\n        SwaggerUIBundle.SwaggerUIStandalonePreset\n        ],\n    })\"\"\"\n\n    if init_oauth:\n        html += f\"\"\"\n        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth)).replace('<', '\\u003c').replace('>', '\\u003e')})\n        \"\"\"\n\n    html += \"\"\"\n    </script>\n    </body>\n    </html>\n    \"\"\"\n    return HTMLResponse(html)\n", "stderr": "", "exit_code": 0}
24run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/openapi/docs.py\")\ns = p.read_text()\nprint(f\"Loop line: {s.count('replace(\\'<\\', \\'\\\\u003c\\')')}\")\nPY\n"
}
{"status": "ok", "stdout": "Loop line: 1\n", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "Loop line: 1\n", "stderr": "", "exit_code": 0}
25run_command
{
 "command": "cd /workspace && python3 - <<'PY'\nfrom pathlib import Path\np = Path(\"fastapi/openapi/docs.py\")\ns = p.read_text()\n# Let's see what happened to the loop.\n# The sed output showed:\n#     for key, value in current_swagger_ui_parameters.items():\n#         html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\"\n# It seems my replace didn't work for the loop.\n# Ah, the loop is inside a triple-quoted string!\n# Let's check the file content.\nPY\n"
}
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
full
{"status": "ok", "stdout": "", "stderr": "", "exit_code": 0}
26run_command
{
 "command": "sed -n '150,170p' fastapi/openapi/docs.py"
}
{"status": "ok", "stdout": " <script src=\"{swagger_js_url}\"></script>\n <!-- `SwaggerUIBundle` is now available on the page -->\n <script>\n const ui = Swagge
full
{"status": "ok", "stdout": "    <script src=\"{swagger_js_url}\"></script>\n    <!-- `SwaggerUIBundle` is now available on the page -->\n    <script>\n    const ui = SwaggerUIBundle({{\n        url: '{openapi_url}',\n    \"\"\"\n\n    for key, value in current_swagger_ui_parameters.items():\n        html += f\"{json.dumps(key)}: {json.dumps(jsonable_encoder(value))},\\n\"\n\n    if oauth2_redirect_url:\n        html += f\"oauth2RedirectUrl: window.location.origin + '{oauth2_redirect_url}',\"\n\n    html += \"\"\"\n    presets: [\n        SwaggerUIBundle.presets.apis,\n        SwaggerUIBundle.SwaggerUIStandalonePreset\n        ],\n    })\"\"\"\n\n    if init_oauth:\n", "stderr": "", "exit_code": 0}

Patch

diff --git a/fastapi/openapi/docs.py b/fastapi/openapi/docs.py
index b845f87c..732a79c0 100644
--- a/fastapi/openapi/docs.py
+++ b/fastapi/openapi/docs.py
@@ -169,7 +169,7 @@ def get_swagger_ui_html(
 
     if init_oauth:
         html += f"""
-        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth))})
+        ui.initOAuth({json.dumps(jsonable_encoder(init_oauth)).replace('<', '\u003c').replace('>', '\u003e')})
         """
 
     html += """

Test output

show
F
=================================== FAILURES ===================================
_______________ test_root_path_does_not_persist_across_requests ________________

    def test_root_path_does_not_persist_across_requests():
        app = FastAPI()
    
        @app.get("/")
        def read_root():  # pragma: no cover
            return {"ok": True}
    
        # Attacker request with a spoofed root_path
        attacker_client = TestClient(app, root_path="/evil-api")
        response1 = attacker_client.get("/openapi.json")
        data1 = response1.json()
        assert any(s.get("url") == "/evil-api" for s in data1.get("servers", []))
    
        # Subsequent legitimate request with no root_path
        clean_client = TestClient(app)
        response2 = clean_client.get("/openapi.json")
        data2 = response2.json()
        servers = [s.get("url") for s in data2.get("servers", [])]
>       assert "/evil-api" not in servers
E       AssertionError: assert '/evil-api' not in ['/evil-api']

tests/test_openapi_cache_root_path.py:23: AssertionError
=============================== warnings summary ===============================
../../../../../../../Users/jp/repos/kaggle-gemini-coding-agent-post-training/.envs/overlays/starlette-0.52.1-py3-none-any/starlette/testclient.py:45
  /Users/jp/repos/kaggle-gemini-coding-agent-post-training/.envs/overlays/starlette-0.52.1-py3-none-any/starlette/testclient.py:45: DeprecationWarning: The anyio.abc.BlockingPortal alias is deprecated, use anyio.from_thread.BlockingPortal instead.
    _PortalFactoryType = Callable[[], AbstractContextManager[anyio.abc.BlockingPortal]]

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
!!!!!!!!!!!!!!!!!!!!!!!!!! stopping after 1 failures !!!!!!!!!!!!!!!!!!!!!!!!!!!
1 failed, 1 warning in 0.42s