URLInputStream.cpp

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#include "StringUtil.h"
#include "CS240Exception.h"
#include "HTTPInputStream.h"
#include "FileInputStream.h"
#include "URLInputStream.h"
#include "InputStream.h"

using namespace std;

InputStream * URLInputStream::StreamFactory(const string & url) {
    string tempUrl = StringUtil::ToLowerCopy(url);
    if (StringUtil::IsPrefix(tempUrl, "file:/")) {
        return new FileInputStream(url);
    }
    else if (StringUtil::IsPrefix(tempUrl, "http://")) {
        return new HTTPInputStream(url);
    }
    else {
        throw InvalidURLException(url);
    }
    
}

URLInputStream::URLInputStream(const std::string & Url) : 
                                 mStream(URLInputStream::StreamFactory(Url))
{
}

URLInputStream::~URLInputStream()
{
    if(mStream && mStream->IsOpen())
    {
        mStream->Close();
        
    }
    
    delete mStream;
}


    
char URLInputStream::Peek()
{
    return mStream->Peek();
}
        
char URLInputStream::Read()
{
    return mStream->Read();
}

void URLInputStream::Close()
{
    
    return mStream->Close();
}

bool URLInputStream::IsOpen()const
{
    return mStream->IsOpen();
}

bool URLInputStream::IsDone()const
{
    return mStream->IsDone();
}

std::string URLInputStream::GetLocation() const
{
    return mStream->GetLocation();
}