CODEWITHSUNDEEP
pythonhtmlflask
Josh K
Josh K

Reputation: 89

Flask render_template is returning a string instead of HTML document

I have this function:

def run():
  if request.method == 'POST':
    print(request.form['id_num'])
    # fix later                                                                                                                  
  else:
    return render_template("apprun.html")

Right now it is always directing to the else statement, but the render_template function is not working correctly. Instead of a fully formatted HTML page, I'm getting the code as if it were a string. Specifically, my webpage is showing the html, instead of reading the html and displaying it properly:

<!DOCTYPE html>
<html>
<head>
<title>Rips Lab</title>
</head>                                 
<body>
<style type="text/css">
            html {
                background-color: #E4E0EE;
                }
           body {
                font-family: "Helvetica","Arial";
                font-size: 20px;
                color: #000000;
                }
</style>


<form>Enter participant ID number: <input type="number" name="id_num" pattern="^[0-9]*$" required></form>
<br><br>

<p name="data"></p>


</body>
</html>

The folder hierarchy is correct; I have a folder called "templates" stored in the same place as the python file I'm running.

Any idea why it's not formatted correctly?

Upvotes: 0

Views: 5420

Answers (4)

user5442
user5442

Reputation: 1

def run():
   if request.method == 'POST':
       print(request.form['id_num'])
       # fix later                                                                                                                  
   else:
       response = make_response(html_content)
       response.headers["Content-Type"] = "text/html"
       return render_template("apprun.html")

Change the content-type in headers to text/html when returning response and browser will render it as html then.

Upvotes: 0

Prakash
Prakash

Reputation: 21

Try below changes, it will work

from flask import make_response,render_template

def run():
  if request.method == 'POST':
    print(request.form['id_num'])
    # fix later                                                                                                                  
  else:
    return make_response(render_template("apprun.html"))

Upvotes: 1

Nathan Wailes
Nathan Wailes

Reputation: 12322

I was just having this issue while using Flask-RESTPlus. It turned out to be happening because I had the route defined as part of my API, which was setting the content-type header to application/json instead of HTML.

Upvotes: 1

Josh K
Josh K

Reputation: 89

The error was because at some point, I had opened the file in my computer's default text editor, which I guess corrupted it somehow. I'm not really sure why, because I've opened .py files in it before with no issue.

I fixed the issue by creating a new file and editing it with emacs, and just retyping it out (it wasn't that large)

Upvotes: 0

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