nginx with flask and memcached returns some garbled characters

Question

I'm trying to cache Python/flask responses with memcached. I then want to serve the cache using nginx. I'm using flask code that looks something like this: ``` from flask import Flask, render_template from werkzeug.contrib.cache import MemcachedCache app = Flask(__name__) cache = MemcachedCache(['127.0.0.1:11211']) @app.route('/') def index(): index = cache.get('request:/') if index == None: index = render_template('index.html') cache.set('request:/', index, timeout=5 * 60) return index if __name__ == "__main__": app.run() ``` and an nginx site configuration that looks something like this: ``` server { listen 80; location / { set $memcached_key "request:$request_uri"; memcached_pass 127.0.0.1:11211; error_page 404 405 502 = @cache_miss; } location @cache_miss { uwsgi_pass unix:///tmp/uwsgi.sock; include uwsgi_params; error_page 404 /404.html; } } ``` However, when it pulls from the cache the html code is prefixed with a V, contains \u000a characters (line feeds) and garbled local char…

Accepted Answer

Yay, I fixed it! The nginx configuration was correct before I changed chunked, the python/flask code however should have been:

```
@app.route('/')
def index():
    rv = cache.get('request:/')
    if rv == None:
        rv = render_template('index.html')
        cachable = make_response(rv).data
        cache.set('request:/', cachable, timeout=5 * 60)
    return rv
```

That is, I should only cache the data, and that can only be done, afaik, if I do make_response first

nginx with flask and memcached returns some garbled characters

Solution

Problem