The behavior described wouldn't be considered rape in any country but Sweden, and frankly, I strongly suspect you couldn't even get a conviction in Sweden, at least not as rape. It could arguably be some other form of criminal behavior and at the very least was genuinely scummy behavior, but without a tremendous amount of political pressure, there would never have been a criminal case about this.
The whole thing reeked of politics. Assange flat out told the police supposedly investigating this that he was leaving the country, and rather than arrest him right then and there, as they would have had they had a real case, they wait until he's long gone and only then suddenly are interested in making him a fugitive, because like hell he's going back for that bullshit.
It was a transparent ruse to get him somewhere that would extradite him to the U.S.