FOSRestBundle double leading slash in route - symfony

Question

I'm trying to handle a wrongly coded leading slash route in an Android application. It is trying to reach our system using:
//api/1.0/store/products/video/USD.json
but should normaly be
/api/1.0/store/products/video/USD.json
so this is causing a route not found exception in our app.
I cannot change the android application! I must find a way to make the wrong route work!
What i've tried:
Splitting the controller in two, one with the standard "/api" prefix and one with a prefix of "//api", didn't work, i think FOSRestBundle is fixing that for me live, so all my routes are still only 1 leading slash
Using a rewrite rule in .htaccess (See below) to rewrite the rule before i get problems, this would be the best strategy as it would keep my app and integration tests clean
Attempt using HTACCESS
RewriteRule /api/(.*) api/$1 [L]
This rule is supposed to work if i test it on "http://martinmelin.se/rewrite-rule-tester/" but in my htaccess it doesn't. Here's the content of my .htaccess.
Can anyone help me figure out a solution?
# Use the front controller as index file. It serves as a fallback solution when
# every other rewrite/redirect fails (e.g. in an aliased environment without
# mod_rewrite). Additionally, this reduces the matching process for the
# start page (path "/") because otherwise Apache will apply the rewriting rules
# to each configured DirectoryIndex file (e.g. index.php, index.html, index.pl).
DirectoryIndex index.php
<IfModule mod_rewrite.c>
RewriteEngine On
# Rewrite double leading slash routes to single leading slash routes
RewriteRule /api/(.*) api/$1 [L]
# Determine the RewriteBase automatically and set it as environment variable.
# If you are using Apache aliases to do mass virtual hosting or installed the
# project in a subdirectory, the base path will be prepended to allow proper
# resolution of the app.php file and to redirect to the correct URI. It will
# work in environments without path prefix as well, providing a safe, one-size
# fits all solution. But as you do not need it in this case, you can comment
# the following 2 lines to eliminate the overhead.
RewriteCond %{REQUEST_URI}::$1 ^(/.+)/(.*)::\2$
RewriteRule ^(.*) - [E=BASE:%1]
# Sets the HTTP_AUTHORIZATION header removed by apache
RewriteCond %{HTTP:Authorization} .
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
# Redirect to URI without front controller to prevent duplicate content
# (with and without `/app.php`). Only do this redirect on the initial
# rewrite by Apache and not on subsequent cycles. Otherwise we would get an
# endless redirect loop (request -> rewrite to front controller ->
# redirect -> request -> ...).
# So in case you get a "too many redirects" error or you always get redirected
# to the start page because your Apache does not expose the REDIRECT_STATUS
# environment variable, you have 2 choices:
# - disable this feature by commenting the following 2 lines or
# - use Apache >= 2.3.9 and replace all L flags by END flags and remove the
# following RewriteCond (best solution)
RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteRule ^index\.php(/(.*)|$) %{ENV:BASE}/$2 [R=301,L]
# If the requested filename exists, simply serve it.
# We only want to let Apache serve files and not directories.
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule .? - [L]
# Rewrite all other queries to the front controller.
RewriteRule .? %{ENV:BASE}/index.php [L]
</IfModule>
<IfModule !mod_rewrite.c>
<IfModule mod_alias.c>
# When mod_rewrite is not available, we instruct a temporary redirect of
# the start page to the front controller explicitly so that the website
# and the generated links can still be used.
RedirectMatch 302 ^/$ /index.php/
# RedirectTemp cannot be used instead
</IfModule>
</IfModule>

Answer 1

Okay, I tried, and failed to match the requested uri, so I will suggest you different approach, if you find it suitable. How about if we just replace all double leading slashes with single ones?
What I mean is something like that:
RewriteCond %{REQUEST_URI} ^(.*)//(.*)$
RewriteRule . %1/%2 [R=301,L]
The following tests on my project were successful:
/admin//orders => /admin/orders
//admin//orders//5 => /admin/orders/5
And lastly, I pasted yours as well:
//api/1.0/store/products/video/USD.json
gave this:
No route found for "GET /api/1.0/store/products/video/USD.json"
which is I believe what we are looking for. Hope you can use this solution as a temporary one until someone else provides a better one.