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301 Redirecting an old URL to a new one with Flask – SEO

I recently changed the format of my URL’s to have better readability and SEO. However, this will break my current URL’s. So I want to redirect them in flask.

My question is similar to this one here:
Redirecting an old URL to a new one with Flask micro-framework

However, the provided answer gave this:

redirect_urls = {
    '/article/old-url': '/article/new-url/id',
    '/article/old-url-2': '/article/new-url-2/id',
    '/article/old-url-3': '/article/new-url-3/id',
    ...
}

def redirect_url():
    return redirect(redirect_urls[request.url], 301)

for url in redirect_urls:
    app.add_url_rule(url, url, redirect_url)

The problem is, the code gives a 500 error code.

KeyError: ‘/article/old-url’

Edit:

Full traceback error:

Exception on /article/old-url [GET]
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1988, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1641, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1544, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.4/dist-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1639, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1625, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/*****/mysite/flask_app.py", line 77, in redirect_url
    return redirect(redirect_urls[request.url], 301)
KeyError: 'https://www.example.com/article/old-url'
Tags:

3

Answers


  1. 0

    as wrote Klaus above just add @route decorator to your methods like:

    @app.route('/article/old-url', methods=['GET'])
def redirect_url():
    return redirect(redirect_urls[request.url], 301)
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  2. 0

    So, it looks like this issue,

      File "/home/*****/mysite/flask_app.py", line 77, in redirect_url
    return redirect(redirect_urls[request.url], 301)
KeyError: 'https://www.example.com/article/old-url'

    is caused because the following dictionary

    redirect_urls = {
    '/article/old-url': '/article/new-url/id',
    '/article/old-url-2': '/article/new-url-2/id',
    '/article/old-url-3': '/article/new-url-3/id',
    ...
}

    only has the child path.

    To resolve this, one approach you can take is 

    BASE_URL = 'https://www.example.com'
return redirect(redirect_urls[request.url.replace(BASE_URL, '')], 301)

    This will end up performing the following which is in the dictionary redirect_urls.

    return redirect(redirect_urls['/article/old-url'], 301)
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  3. 0

    Here is how I managed it.

    @app.before_request
def check_page():
    dict_of_pages = {
        '/page1/': '/page/1'
    }
    url = request.full_path.strip('?') 
    if url in dict_of_pages.keys():
        return redirect(dict_of_pages.get(url), code=301)

    pass
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