I'm trying to render this simple code on a jinja template:

@app.get("/", response_class=HTMLResponse)
async def read_root(request: Request, item: Optional[str] = None):
item = "<script>"
return templates.TemplateResponse('index.html', {
 'request': request,
 'item': item
})

but when I use the variable on the HTML template for example like this:

<h1>{{item}}</h1>

it shows this on the code:

<h1>&lt;script&gt;</h1>

is there anyway to decode that variable to show as it is declared?

CodePudding user response：

FastAPI uses the templating support in starlette, which sets the Jinja2 autoescape option by default.

You can disable that like this:

templates = Jinja2Templates(directory="templates")
templates.env.autoescape = False

With more recent versions of starlette, you may also be able to do this:

templates = Jinja2Templates(directory="templates", autoescape=False)

...but with the version I'm running the latter option fails. The former option should work in any case.

CodePudding user response：

Just found out how to do it,

adding in the HTML:

{% autoescape false %}
{{ your_variable }}
{% endautoescape %}