pjs/netwerk/streamconv/test/Converters.cpp

174 строки
5.2 KiB
C++

#include "Converters.h"
#include "nsIStringStream.h"
#include "nsCOMPtr.h"
#include "nsComponentManagerUtils.h"
#include <stdio.h>
//////////////////////////////////////////////////
// TestConverter
//////////////////////////////////////////////////
NS_IMPL_ISUPPORTS3(TestConverter,
nsIStreamConverter,
nsIStreamListener,
nsIRequestObserver)
TestConverter::TestConverter() {
}
// Convert aFromStream (of type aFromType), to _retval (nsIInputStream of type aToType).
// This Convert method simply converts the stream byte-by-byte, to the first character
// in the aToType "string".
NS_IMETHODIMP
TestConverter::Convert(nsIInputStream *aFromStream,
const char *aFromType,
const char *aToType,
nsISupports *ctxt,
nsIInputStream **_retval) {
char buf[1024+1];
PRUint32 read;
nsresult rv = aFromStream->Read(buf, 1024, &read);
if (NS_FAILED(rv) || read == 0) return rv;
// verify that the data we're converting matches the from type
// if it doesn't then we're being handed the wrong data.
char fromChar = *aFromType;
if (fromChar != buf[0]) {
printf("We're receiving %c, but are supposed to have %c.\n", buf[0], fromChar);
return NS_ERROR_FAILURE;
}
// Get the first character
char toChar = *aToType;
for (PRUint32 i = 0; i < read; i++)
buf[i] = toChar;
buf[read] = '\0';
nsCOMPtr<nsIStringInputStream> str
(do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = str->SetData(buf, read);
NS_ENSURE_SUCCESS(rv, rv);
NS_ADDREF(*_retval = str);
return NS_OK;
}
/* This method initializes any internal state before the stream converter
* begins asynchronous conversion */
NS_IMETHODIMP
TestConverter::AsyncConvertData(const char *aFromType,
const char *aToType,
nsIStreamListener *aListener,
nsISupports *ctxt) {
NS_ASSERTION(aListener, "null listener");
mListener = aListener;
// based on these types, setup internal state to handle the appropriate conversion.
fromType = aFromType;
toType = aToType;
return NS_OK;
}
// nsIStreamListener method
/* This method handles asyncronous conversion of data. */
NS_IMETHODIMP
TestConverter::OnDataAvailable(nsIRequest* request,
nsISupports *ctxt,
nsIInputStream *inStr,
PRUint32 sourceOffset,
PRUint32 count) {
nsresult rv;
nsCOMPtr<nsIInputStream> convertedStream;
// just make a syncronous call to the Convert() method.
// Anything can happen here, I just happen to be using the sync call to
// do the actual conversion.
rv = Convert(inStr, fromType.get(), toType.get(), ctxt, getter_AddRefs(convertedStream));
if (NS_FAILED(rv)) return rv;
PRUint32 len;
convertedStream->Available(&len);
return mListener->OnDataAvailable(request, ctxt, convertedStream, sourceOffset, len);
}
// nsIRequestObserver methods
/* These methods just pass through directly to the mListener */
NS_IMETHODIMP
TestConverter::OnStartRequest(nsIRequest* request, nsISupports *ctxt) {
return mListener->OnStartRequest(request, ctxt);
}
NS_IMETHODIMP
TestConverter::OnStopRequest(nsIRequest* request, nsISupports *ctxt,
nsresult aStatus) {
return mListener->OnStopRequest(request, ctxt, aStatus);
}
////////////////////////////////////////////////////////////////////////
// TestConverterFactory
////////////////////////////////////////////////////////////////////////
TestConverterFactory::TestConverterFactory(const nsCID &aClass,
const char* className,
const char* contractID)
: mClassID(aClass), mClassName(className), mContractID(contractID)
{
}
TestConverterFactory::~TestConverterFactory()
{
}
NS_IMPL_ISUPPORTS1(TestConverterFactory, nsIFactory)
NS_IMETHODIMP
TestConverterFactory::CreateInstance(nsISupports *aOuter,
const nsIID &aIID,
void **aResult)
{
if (! aResult)
return NS_ERROR_NULL_POINTER;
if (aOuter)
return NS_ERROR_NO_AGGREGATION;
*aResult = nsnull;
nsresult rv = NS_OK;
nsISupports *inst = nsnull;
if (mClassID.Equals(kTestConverterCID)) {
TestConverter *conv = new TestConverter();
if (!conv) return NS_ERROR_OUT_OF_MEMORY;
conv->QueryInterface(NS_GET_IID(nsISupports), (void**)&inst);
}
else {
return NS_ERROR_NO_INTERFACE;
}
if (!inst)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(inst);
*aResult = inst;
NS_RELEASE(inst);
return rv;
}
nsresult TestConverterFactory::LockFactory(PRBool aLock)
{
// Not implemented in simplest case.
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
// TestConverterFactory END
////////////////////////////////////////////////////////////////////////