зеркало из https://github.com/mozilla/gecko-dev.git
not in main build - added comments and collapsed interface method definitions into related macros
This commit is contained in:
valeski%netscape.com
Родитель
63ba955ba3
Коммит
e1ba01e5de
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@ -35,6 +35,8 @@ NS_IMPL_ISUPPORTS2(nsMultiMixedConv, nsIStreamConverter, nsIStreamListener);
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// nsIStreamConverter implementation
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// No syncronous conversion at this time.
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NS_IMETHODIMP
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nsMultiMixedConv::Convert(nsIInputStream *aFromStream,
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const PRUnichar *aFromType,
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@ -43,11 +45,18 @@ nsMultiMixedConv::Convert(nsIInputStream *aFromStream,
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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// Stream converter service calls this to initialize the actual stream converter (us).
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NS_IMETHODIMP
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nsMultiMixedConv::AsyncConvertData(const PRUnichar *aFromType, const PRUnichar *aToType,
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nsIStreamListener *aListener, nsISupports *aCtxt) {
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NS_ASSERTION(aListener && aFromType && aToType, "null pointer passed into multi mixed converter");
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// hook up our final listener. this guy gets the various On*() calls we want to throw
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// at him.
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//
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// WARNING: this listener must be able to handle multiple OnStartRequest, OnDataAvail()
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// and OnStopRequest() call combinations. We call of series of these for each sub-part
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// in the raw stream.
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mFinalListener = aListener;
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NS_ADDREF(mFinalListener);
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@ -60,10 +69,8 @@ NS_IMETHODIMP
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nsMultiMixedConv::OnDataAvailable(nsIChannel *channel, nsISupports *ctxt,
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nsIInputStream *inStr, PRUint32 sourceOffset, PRUint32 count) {
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nsresult rv;
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char *buffer = nsnull, *rootMemPtr = nsnull, *delimiter = nsnull, *bndry = nsnull;
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char *buffer = nsnull, *rootMemPtr = nsnull;
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PRUint32 bufLen, read;
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rv = inStr->GetLength(&bufLen);
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if (NS_FAILED(rv)) return rv;
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NS_ASSERTION(channel, "multimixed converter needs a channel");
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@ -73,6 +80,7 @@ nsMultiMixedConv::OnDataAvailable(nsIChannel *channel, nsISupports *ctxt,
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nsIHTTPChannel *httpChannel = nsnull;
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rv = channel->QueryInterface(NS_GET_IID(nsIHTTPChannel), (void**)&httpChannel);
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if (NS_SUCCEEDED(rv)) {
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char *bndry = nsnull, *delimiter = nsnull;
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nsIAtom *header = NS_NewAtom("content-type");
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if (!header) return NS_ERROR_OUT_OF_MEMORY;
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rv = httpChannel->GetResponseHeader(header, &delimiter);
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@ -81,24 +89,28 @@ nsMultiMixedConv::OnDataAvailable(nsIChannel *channel, nsISupports *ctxt,
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if (NS_FAILED(rv)) return rv;
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bndry = PL_strstr(delimiter, "boundary");
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if (!bndry) {
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// if we dont' have a boundary we're hosed.
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return NS_ERROR_FAILURE;
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}
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if (!bndry) return NS_ERROR_FAILURE;
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bndry = PL_strchr(bndry, '=');
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if (!bndry) return NS_ERROR_FAILURE;
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bndry += 1;
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bndry++; // move past the equals sign
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nsString2 boundaryString(bndry, eOneByte);
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boundaryString.StripWhitespace();
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mBoundaryCStr = boundaryString.ToNewCString();
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if (!mBoundaryCStr) return NS_ERROR_OUT_OF_MEMORY;
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mBoundaryStrLen = boundaryString.Length();
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} else {
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// we couldn't get at the boundary and we need one.
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NS_ASSERTION(0, "no http channel to get the multipart boundary from");
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return NS_ERROR_FAILURE;
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}
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}
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rv = inStr->GetLength(&bufLen);
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if (NS_FAILED(rv)) return rv;
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rootMemPtr = buffer = (char*)nsAllocator::Alloc(bufLen + 1);
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if (!buffer) return NS_ERROR_OUT_OF_MEMORY;
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@ -106,7 +118,17 @@ nsMultiMixedConv::OnDataAvailable(nsIChannel *channel, nsISupports *ctxt,
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if (NS_FAILED(rv)) return rv;
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buffer[bufLen] = '\0';
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// search the buffered data for the delimiting token.
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// Break up the stream into it sub parts and send off an On*() triple combination
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// for each subpart.
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// This design of HTTP's multipart/x-mixed-replace (see nsMultiMixedConv.h for more info)
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// was flawed from the start. This parsing makes the following, poor, assumption about
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// the data coming from the server:
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//
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// - The server will never send a partial boundary token
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//
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// This assumption is necessary in order for this type to be handled. Also note that
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// the server doesn't send any Content-Length information.
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char *boundaryLoc = PL_strstr(buffer, mBoundaryCStr);
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do {
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if (boundaryLoc) {
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@ -218,8 +240,6 @@ nsMultiMixedConv::OnDataAvailable(nsIChannel *channel, nsISupports *ctxt,
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rv = SendData(buffer, mPartChannel, ctxt);
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if (NS_FAILED(rv)) return rv;
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}
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// XXX we can probably break out of the loop here instead of iterating
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// XXX again.
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boundaryLoc = PL_strstr(buffer, mBoundaryCStr);
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}
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} else {
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@ -261,10 +281,10 @@ nsMultiMixedConv::OnStopRequest(nsIChannel *channel, nsISupports *ctxt,
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// nsMultiMixedConv methods
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nsMultiMixedConv::nsMultiMixedConv() {
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NS_INIT_ISUPPORTS();
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mFinalListener = nsnull;
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mBoundaryCStr = nsnull;
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mBoundaryStrLen = mPartCount = 0;
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mPartChannel = nsnull;
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mFinalListener = nsnull;
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mBoundaryCStr = nsnull;
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mPartChannel = nsnull;
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mBoundaryStrLen = mPartCount = 0;
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}
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nsMultiMixedConv::~nsMultiMixedConv() {
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@ -387,9 +407,7 @@ MultiMixedFactory::CreateInstance(nsISupports *aOuter,
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}
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nsresult
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MultiMixedFactory::LockFactory(PRBool aLock)
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{
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// Not implemented in simplest case.
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MultiMixedFactory::LockFactory(PRBool aLock){
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return NS_OK;
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}
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@ -399,8 +417,7 @@ NSGetFactory(nsISupports* aServMgr,
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const nsCID &aClass,
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const char *aClassName,
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const char *aProgID,
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nsIFactory **aFactory)
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{
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nsIFactory **aFactory) {
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nsresult rv;
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if (aFactory == nsnull)
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return NS_ERROR_NULL_POINTER;
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@ -421,8 +438,7 @@ NSGetFactory(nsISupports* aServMgr,
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extern "C" PR_IMPLEMENT(nsresult)
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NSRegisterSelf(nsISupports* aServMgr , const char* aPath)
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{
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NSRegisterSelf(nsISupports* aServMgr , const char* aPath) {
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nsresult rv;
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nsCOMPtr<nsIServiceManager> servMgr(do_QueryInterface(aServMgr, &rv));
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@ -443,8 +459,7 @@ NSRegisterSelf(nsISupports* aServMgr , const char* aPath)
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extern "C" PR_IMPLEMENT(nsresult)
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NSUnregisterSelf(nsISupports* aServMgr, const char* aPath)
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{
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NSUnregisterSelf(nsISupports* aServMgr, const char* aPath) {
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nsresult rv;
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nsCOMPtr<nsIServiceManager> servMgr(do_QueryInterface(aServMgr, &rv));
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@ -32,6 +32,26 @@
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}
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static NS_DEFINE_CID(kMultiMixedConverterCID, NS_MULTIMIXEDCONVERTER_CID);
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// The nsMultiMixedConv stream converter converts a stream of type "multipart/x-mixed-replace"
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// to it's subparts. There was some debate as to whether or not the functionality desired
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// when HTTP confronted this type required a stream converter. After all, this type really
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// prompts various viewer related actions rather than stream conversion. There simply needs
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// to be a piece in place that can strip out the multiple parts of a stream of this type, and
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// "display" them accordingly.
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//
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// With that said, this "stream converter" spends more time packaging up the sub parts of the
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// main stream and sending them off the destination stream listener, than doing any real
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// stream parsing/converting.
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//
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// WARNING: This converter requires that it's destination stream listener be able to handle
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// multiple OnStartRequest(), OnDataAvailable(), and OnStopRequest() call combinations.
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// Each series represents the beginning, data production, and ending phase of each sub-
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// part of the original stream.
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//
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// NOTE: this MIME-type is used by HTTP, *not* SMTP, or IMAP.
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//
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// NOTE: For reference, a general description of how this MIME type should be handled via
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// HTTP, see http://home.netscape.com/assist/net_sites/pushpull.html
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class nsMultiMixedConv : public nsIStreamConverter {
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public:
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@ -39,22 +59,13 @@ public:
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NS_DECL_ISUPPORTS
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// nsIStreamConverter methods
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NS_IMETHOD Convert(nsIInputStream *aFromStream,
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const PRUnichar *aFromType,
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const PRUnichar *aToType,
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nsISupports *aCtxt, nsIInputStream **_retval);
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NS_IMETHOD AsyncConvertData(const PRUnichar *aFromType, const PRUnichar *aToType,
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nsIStreamListener *aListener, nsISupports *aCtxt);
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NS_DECL_NSISTREAMCONVERTER
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// nsIStreamListener methods
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NS_IMETHOD OnDataAvailable(nsIChannel *channel, nsISupports *ctxt,
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nsIInputStream *inStr, PRUint32 sourceOffset, PRUint32 count);
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NS_DECL_NSISTREAMLISTENER
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// nsIStreamObserver methods
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NS_IMETHOD OnStartRequest(nsIChannel *channel, nsISupports *ctxt);
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NS_IMETHOD OnStopRequest(nsIChannel *channel, nsISupports *ctxt,
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nsresult status, const PRUnichar *errorMsg);
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NS_DECL_NSISTREAMOBSERVER
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// nsMultiMixedConv methods
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nsMultiMixedConv();
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@ -63,6 +74,7 @@ public:
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nsresult SendData(const char *aBuffer, nsIChannel *aChannel, nsISupports *aCtxt);
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nsresult BuildURI(nsIChannel *aChannel, nsIURI **_retval);
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// For factory creation.
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static NS_METHOD
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Create(nsISupports *aOuter, REFNSIID aIID, void **aResult) {
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nsresult rv;
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