There is only one safe-injection site in Canada.
Rob Ford will never allow one in Toronto. When it was being discussed back in 2009, he came out and said some very stupid things about a feasibility study being started at the time. It should also be noted that the drug issue in Toronto is a bit different than in Vancouver; in Vancouver, it was already fairly concentrated to a particular region of the city.
Harper wants to close InSite in Vancouver. When the BC RCMP and the BC Center for Excellence in HIV/AIDS wanted to come out with a joint statement saying "These studies are showing that there are positive benefits", the BC RCMP was instructed by Ottawa to immediately disengage.