C++ AString::erase方法代码示例

// Converts a raw 160-bit SHA1 digest into a Java Hex representation
// According to http://wiki.vg/wiki/index.php?title=Protocol_Encryption&oldid=2802
static void DigestToJava(byte a_Digest[20], AString & a_Out)
{
	bool IsNegative = (a_Digest[0] >= 0x80);
	if (IsNegative)
	{
		// Two's complement:
		bool carry = true;  // Add one to the whole number
		for (int i = 19; i >= 0; i--)
		{
			a_Digest[i] = ~a_Digest[i];
			if (carry)
			{
				carry = (a_Digest[i] == 0xff);
				a_Digest[i]++;
			}
		}
	}
	a_Out.clear();
	a_Out.reserve(40);
	for (int i = 0; i < 20; i++)
	{
		AppendPrintf(a_Out, "%02x", a_Digest[i]);
	}
	while ((a_Out.length() > 0) && (a_Out[0] == '0'))
	{
		a_Out.erase(0, 1);
	}
	if (IsNegative)
	{
		a_Out.insert(0, "-");
	}
}

bool cSocketThreads::cSocketThread::SendDataThroughSocket(cSocket & a_Socket, AString & a_Data)
{
	// Send data in smaller chunks, so that the OS send buffers aren't overflown easily
	while (!a_Data.empty())
	{
		size_t NumToSend = std::min(a_Data.size(), (size_t)1024);
		int Sent = a_Socket.Send(a_Data.data(), NumToSend);
		if (Sent < 0)
		{
			int Err = cSocket::GetLastError();
			if (Err == cSocket::ErrWouldBlock)
			{
				// The OS send buffer is full, leave the outgoing data for the next time
				return true;
			}
			// An error has occured
			return false;
		}
		if (Sent == 0)
		{
			a_Socket.CloseSocket();
			return true;
		}
		a_Data.erase(0, Sent);
	}
	return true;
}

void cBrewingRecipes::ReloadRecipes(void)
{
	ClearRecipes();
	LOGD("Loading brewing recipes...");

	std::ifstream f(BREWING_RECIPE_FILE, std::ios::in);
	if (!f.good())
	{
		LOG("Could not open the brewing recipes file \"%s\". No brewing recipes are available.", BREWING_RECIPE_FILE);
		return;
	}

	unsigned int LineNum = 0;
	AString ParsingLine;

	while (std::getline(f, ParsingLine))
	{
		LineNum++;
		// Remove comments from the line:
		size_t FirstCommentSymbol = ParsingLine.find('#');
		if (FirstCommentSymbol != AString::npos)
		{
			ParsingLine.erase(ParsingLine.begin() += static_cast<long>(FirstCommentSymbol), ParsingLine.end());
		}

		if (ParsingLine.empty())
		{
			continue;
		}
		AddRecipeFromLine(ParsingLine, LineNum);
	}  // while (getline(ParsingLine))

	LOG("Loaded " SIZE_T_FMT " brewing recipes", m_pState->Recipes.size());
}

void cSHA1Checksum::DigestToJava(const Checksum & a_Digest, AString & a_Out)
{
	Checksum Digest;
	memcpy(Digest, a_Digest, sizeof(Digest));
	
	bool IsNegative = (Digest[0] >= 0x80);
	if (IsNegative)
	{
		// Two's complement:
		bool carry = true;  // Add one to the whole number
		for (int i = 19; i >= 0; i--)
		{
			Digest[i] = ~Digest[i];
			if (carry)
			{
				carry = (Digest[i] == 0xff);
				Digest[i]++;
			}
		}
	}
	a_Out.clear();
	a_Out.reserve(40);
	for (int i = 0; i < 20; i++)
	{
		AppendPrintf(a_Out, "%02x", Digest[i]);
	}
	while ((a_Out.length() > 0) && (a_Out[0] == '0'))
	{
		a_Out.erase(0, 1);
	}
	if (IsNegative)
	{
		a_Out.insert(0, "-");
	}
}

bool ARTSPConnection::receiveRTSPRequest() {
    AString requestLine;
	LOGI(LOG_TAG,"start receiveLine ......\n");
    if (!receiveLine(&requestLine)) {
        return false;
    }
//	LOGI(LOG_TAG,"receiveLine OK\n");
    sp<AMessage>  request = new AMessage(kWhatRequest,mhandlerID);
	request->setInt32("SessionID",mSessionID);
	LOGI(LOG_TAG,"request->setInt32 SessionID %d\n",mSessionID);
    LOGI(LOG_TAG,"request: %s\n", requestLine.c_str());

    ssize_t space1 = requestLine.find(" ");//寻找空格
    if (space1 < 0) {
        return false;
    }
    ssize_t space2 = requestLine.find(" ", space1 + 1);
    if (space2 < 0) {
        return false;
    }

    AString Method(requestLine.c_str(), space1);
	request->setString("Method",Method.c_str());
	AString URI(requestLine,space1+1,space2-space1-1);
	request->setString("URI",URI.c_str());
    AString line;
    for (;;) {
        if (!receiveLine(&line)) {
            break;
        }

        if (line.empty()) {
            break;
        }

        ssize_t colonPos = line.find(":");
        if (colonPos < 0) {
            // Malformed header line.
            return false;
        }

        AString key(line, 0, colonPos);
        key.trim();
       // key.tolower();

        line.erase(0, colonPos + 1);
        line.trim();
		
        LOGI(LOG_TAG,"line: %s:%s\n", key.c_str(),line.c_str());

	    request->setString(key.c_str(),line.c_str());	
    }
	LOGI(LOG_TAG,"Post the request to handler\n");
    request->post();//将请求消息发送给uplayer 处理
	return OK;
}

void cFurnaceRecipe::ReloadRecipes(void)
{
	ClearRecipes();
	LOGD("Loading furnace recipes...");

	std::ifstream f(FURNACE_RECIPE_FILE, std::ios::in);
	if (!f.good())
	{
		LOG("Could not open the furnace recipes file \"%s\". No furnace recipes are available.", FURNACE_RECIPE_FILE);
		return;
	}

	unsigned int LineNum = 0;
	AString ParsingLine;

	while (std::getline(f, ParsingLine))
	{
		LineNum++;
		if (ParsingLine.empty())
		{
			continue;
		}

		// Remove comments from the line:
		size_t FirstCommentSymbol = ParsingLine.find('#');
		if ((FirstCommentSymbol != AString::npos) && (FirstCommentSymbol != 0))
		{
			ParsingLine.erase(ParsingLine.begin() + static_cast<const long>(FirstCommentSymbol), ParsingLine.end());
		}

		switch (ParsingLine[0])
		{
			case '#':
			{
				// Comment
				break;
			}

			case '!':
			{
				AddFuelFromLine(ParsingLine, LineNum);
				break;
			}

			default:
			{
				AddRecipeFromLine(ParsingLine, LineNum);
				break;
			}
		}  // switch (ParsingLine[0])
	}  // while (getline(ParsingLine))

	LOG("Loaded " SIZE_T_FMT " furnace recipes and " SIZE_T_FMT " fuels", m_pState->Recipes.size(), m_pState->Fuel.size());
}

void cPlayer::KilledBy(cEntity * a_Killer)
{
	super::KilledBy(a_Killer);

	if (m_Health > 0)
	{
		return; //  not dead yet =]
	}

	m_bVisible = false; // So new clients don't see the player

	// Puke out all the items
	cItems Pickups;
	m_Inventory.CopyToItems(Pickups);
	m_Inventory.Clear();

	if (GetName() == "Notch")
	{
		Pickups.Add(cItem(E_ITEM_RED_APPLE));
	}

	m_Stats.AddValue(statItemsDropped, Pickups.Size());

	m_World->SpawnItemPickups(Pickups, GetPosX(), GetPosY(), GetPosZ(), 10);
	SaveToDisk();  // Save it, yeah the world is a tough place !

	if (a_Killer == NULL)
	{
		GetWorld()->BroadcastChatDeath(Printf("%s was killed by environmental damage", GetName().c_str()));
	}
	else if (a_Killer->IsPlayer())
	{
		cPlayer * Killer = (cPlayer *)a_Killer;

		GetWorld()->BroadcastChatDeath(Printf("%s was killed by %s", GetName().c_str(), Killer->GetName().c_str()));
	}
	else
	{
		AString KillerClass = a_Killer->GetClass();
		KillerClass.erase(KillerClass.begin()); // Erase the 'c' of the class (e.g. "cWitch" -> "Witch")

		GetWorld()->BroadcastChatDeath(Printf("%s was killed by a %s", GetName().c_str(), KillerClass.c_str()));
	}

	m_Stats.AddValue(statDeaths);

	m_World->GetScoreBoard().AddPlayerScore(GetName(), cObjective::otDeathCount, 1);
}

AString GetOSErrorString( int a_ErrNo)
{
	char buffer[ 1024 ];
	AString Out;

	#ifdef _WIN32

	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, a_ErrNo, 0, buffer, ARRAYCOUNT(buffer), NULL);
	Printf(Out, "%d: %s", a_ErrNo, buffer);
	if (!Out.empty() && (Out[Out.length() - 1] == '\n'))
	{
		Out.erase(Out.length() - 2);
	}
	return Out;
	
	#else  // _WIN32
	
	// According to http://linux.die.net/man/3/strerror_r there are two versions of strerror_r():
	
	#if !defined(__APPLE__) && ( _GNU_SOURCE) && !defined(ANDROID_NDK)  // GNU version of strerror_r()
	
	char * res = strerror_r( errno, buffer, ARRAYCOUNT(buffer));
	if (res != NULL)
	{
		Printf(Out, "%d: %s", a_ErrNo, res);
		return Out;
	}
	
	#else  // XSI version of strerror_r():
	
	int res = strerror_r( errno, buffer, ARRAYCOUNT(buffer));
	if (res == 0)
	{
		Printf(Out, "%d: %s", a_ErrNo, buffer);
		return Out;
	}
	
	#endif  // strerror_r() version
	
	else
	{
		Printf(Out, "Error %d while getting error string for error #%d!", errno, a_ErrNo);
		return Out;
	}
	
	#endif  // else _WIN32
}

void cCompositeChat::AddStyle(AString & a_Style, const AString & a_AddStyle)
{
	if (a_AddStyle.empty())
	{
		return;
	}
	if (a_AddStyle[0] == '@')
	{
		size_t idx = a_Style.find('@');
		if ((idx != AString::npos) && (idx != a_Style.length()))
		{
			a_Style.erase(idx, 2);
		}
		a_Style.append(a_AddStyle);
		return;
	}
	a_Style.append(a_AddStyle);
}

void cIniFile::RemoveBom(AString & a_line) const
{
	// The BOM sequence for UTF-8 is 0xEF, 0xBB, 0xBF
	static unsigned const char BOM[] = { 0xEF, 0xBB, 0xBF };

	// The BOM sequence, if present, is always th e first three characters of the input.
	const AString ref = a_line.substr(0, 3);

	// If any of the first three chars do not match, return and do nothing.
	for (size_t i = 0; i < 3; ++i)
	{
		if (static_cast<unsigned char>(ref[i]) != BOM[i])
		{
			return;
		}
	}

	// First three characters match; erase them.
	a_line.erase(0, 3);
}

void cMojangAPI::CacheUUIDToProfile(const AString & a_UUID)
{
	ASSERT(a_UUID.size() == 32);
	
	// Check if already present:
	{
		if (m_UUIDToProfile.find(a_UUID) != m_UUIDToProfile.end())
		{
			return;
		}
	}
	
	// Create the request address:
	AString Address = m_UUIDToProfileAddress;
	ReplaceString(Address, "%UUID%", a_UUID);
	
	// Create the HTTP request:
	AString Request;
	Request += "GET " + Address + " HTTP/1.0\r\n";  // We need to use HTTP 1.0 because we don't handle Chunked transfer encoding
	Request += "Host: " + m_UUIDToProfileServer + "\r\n";
	Request += "User-Agent: MCServer\r\n";
	Request += "Connection: close\r\n";
	Request += "Content-Length: 0\r\n";
	Request += "\r\n";

	// Get the response from the server:
	AString Response;
	if (!SecureRequest(m_UUIDToProfileServer, Request, Response))
	{
		return;
	}

	// Check the HTTP status line:
	const AString Prefix("HTTP/1.1 200 OK");
	AString HexDump;
	if (Response.compare(0, Prefix.size(), Prefix))
	{
		LOGINFO("%s failed: bad HTTP status line received", __FUNCTION__);
		LOGD("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
		return;
	}

	// Erase the HTTP headers from the response:
	size_t idxHeadersEnd = Response.find("\r\n\r\n");
	if (idxHeadersEnd == AString::npos)
	{
		LOGINFO("%s failed: bad HTTP response header received", __FUNCTION__);
		LOGD("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
		return;
	}
	Response.erase(0, idxHeadersEnd + 4);
	
	// Parse the returned string into Json:
	Json::Reader reader;
	Json::Value root;
	if (!reader.parse(Response, root, false) || !root.isObject())
	{
		LOGWARNING("%s failed: Cannot parse received data (NameToUUID) to JSON!", __FUNCTION__);
		LOGD("Response body:\n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
		return;
	}

	/* Example response:
	{
		"id": "b1caf24202a841a78055a079c460eee7",
		"name": "xoft",
		"properties":
		[
			{
				"name": "textures",
				"value": "eyJ0aW1lc3RhbXAiOjE0MDcwNzAzMjEyNzEsInByb2ZpbGVJZCI6ImIxY2FmMjQyMDJhODQxYTc4MDU1YTA3OWM0NjBlZWU3IiwicHJvZmlsZU5hbWUiOiJ4b2Z0IiwiaXNQdWJsaWMiOnRydWUsInRleHR1cmVzIjp7IlNLSU4iOnsidXJsIjoiaHR0cDovL3RleHR1cmVzLm1pbmVjcmFmdC5uZXQvdGV4dHVyZS9iNzc5YmFiZjVhNTg3Zjk0OGFkNjc0N2VhOTEyNzU0MjliNjg4Mjk1YWUzYzA3YmQwZTJmNWJmNGQwNTIifX19",
				"signature": "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"
			}
		]
	}
	*/

	// Store the returned result into caches:
	AString PlayerName = root.get("name", "").asString();
	if (PlayerName.empty())
	{
		// No valid playername, bail out
		return;
	}
	Json::Value Properties = root.get("properties", "");
	Int64 Now = time(NULL);
	{
		cCSLock Lock(m_CSUUIDToProfile);
		m_UUIDToProfile[a_UUID] = sProfile(PlayerName, a_UUID, Properties, Now);
	}
	{
		cCSLock Lock(m_CSUUIDToName);
		m_UUIDToName[a_UUID] = sProfile(PlayerName, a_UUID, Properties, Now);
	}
	{
		cCSLock Lock(m_CSNameToUUID);
		m_NameToUUID[StrToLower(PlayerName)] = sProfile(PlayerName, a_UUID, Properties, Now);
	}
}

void cMojangAPI::CacheNamesToUUIDs(const AStringVector & a_PlayerNames)
{
	// Create a list of names to query, by removing those that are already cached:
	AStringVector NamesToQuery;
	NamesToQuery.reserve(a_PlayerNames.size());
	{
		cCSLock Lock(m_CSNameToUUID);
		for (AStringVector::const_iterator itr = a_PlayerNames.begin(), end = a_PlayerNames.end(); itr != end; ++itr)
		{
			if (m_NameToUUID.find(*itr) == m_NameToUUID.end())
			{
				NamesToQuery.push_back(*itr);
			}
		}  // for itr - a_PlayerNames[]
	}  // Lock(m_CSNameToUUID)
	
	while (!NamesToQuery.empty())
	{
		// Create the request body - a JSON containing up to MAX_PER_QUERY playernames:
		Json::Value root;
		int Count = 0;
		AStringVector::iterator itr = NamesToQuery.begin(), end = NamesToQuery.end();
		for (; (itr != end) && (Count < MAX_PER_QUERY); ++itr, ++Count)
		{
			Json::Value req(*itr);
			root.append(req);
		}  // for itr - a_PlayerNames[]
		NamesToQuery.erase(NamesToQuery.begin(), itr);
		Json::FastWriter Writer;
		AString RequestBody = Writer.write(root);
	
		// Create the HTTP request:
		AString Request;
		Request += "POST " + m_NameToUUIDAddress + " HTTP/1.0\r\n";  // We need to use HTTP 1.0 because we don't handle Chunked transfer encoding
		Request += "Host: " + m_NameToUUIDServer + "\r\n";
		Request += "User-Agent: MCServer\r\n";
		Request += "Connection: close\r\n";
		Request += "Content-Type: application/json\r\n";
		Request += Printf("Content-Length: %u\r\n", (unsigned)RequestBody.length());
		Request += "\r\n";
		Request += RequestBody;

		// Get the response from the server:
		AString Response;
		if (!SecureRequest(m_NameToUUIDServer, Request, Response))
		{
			continue;
		}

		// Check the HTTP status line:
		const AString Prefix("HTTP/1.1 200 OK");
		AString HexDump;
		if (Response.compare(0, Prefix.size(), Prefix))
		{
			LOGINFO("%s failed: bad HTTP status line received", __FUNCTION__);
			LOGD("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
			continue;
		}

		// Erase the HTTP headers from the response:
		size_t idxHeadersEnd = Response.find("\r\n\r\n");
		if (idxHeadersEnd == AString::npos)
		{
			LOGINFO("%s failed: bad HTTP response header received", __FUNCTION__);
			LOGD("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
			continue;
		}
		Response.erase(0, idxHeadersEnd + 4);
		
		// Parse the returned string into Json:
		Json::Reader reader;
		if (!reader.parse(Response, root, false) || !root.isArray())
		{
			LOGWARNING("%s failed: Cannot parse received data (NameToUUID) to JSON!", __FUNCTION__);
			LOGD("Response body:\n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
			continue;
		}
	
		// Store the returned results into cache:
		size_t JsonCount = root.size();
		Int64 Now = time(NULL);
		{
			cCSLock Lock(m_CSNameToUUID);
			for (size_t idx = 0; idx < JsonCount; ++idx)
			{
				Json::Value & Val = root[idx];
				AString JsonName = Val.get("name", "").asString();
				AString JsonUUID = MakeUUIDShort(Val.get("id", "").asString());
				if (JsonUUID.empty())
				{
					continue;
				}
				m_NameToUUID[StrToLower(JsonName)] = sProfile(JsonName, JsonUUID, "", "", Now);
			}  // for idx - root[]
		}  // cCSLock (m_CSNameToUUID)
		
		// Also cache the UUIDToName:
		{
			cCSLock Lock(m_CSUUIDToName);
			for (size_t idx = 0; idx < JsonCount; ++idx)
//.........这里部分代码省略.........

bool ARTSPConnection::receiveRTSPReponse() {
    AString statusLine;

    if (!receiveLine(&statusLine)) {
        return false;
    }

    if (statusLine == "$") {
        sp<ABuffer> buffer = receiveBinaryData();

        if (buffer == NULL) {
            return false;
        }

        if (mObserveBinaryMessage != NULL) {
            sp<AMessage> notify = mObserveBinaryMessage->dup();
            notify->setBuffer("buffer", buffer);
            notify->post();
        } else {
            ALOGW("received binary data, but no one cares.");
        }

        return true;
    }

    sp<ARTSPResponse> response = new ARTSPResponse;
    response->mStatusLine = statusLine;

    ALOGI("status: %s", response->mStatusLine.c_str());

    ssize_t space1 = response->mStatusLine.find(" ");
    if (space1 < 0) {
        return false;
    }
    ssize_t space2 = response->mStatusLine.find(" ", space1 + 1);
    if (space2 < 0) {
        return false;
    }

    bool isRequest = false;

    if (!IsRTSPVersion(AString(response->mStatusLine, 0, space1))) {
        CHECK(IsRTSPVersion(
                    AString(
                        response->mStatusLine,
                        space2 + 1,
                        response->mStatusLine.size() - space2 - 1)));

        isRequest = true;

        response->mStatusCode = 0;
    } else {
        AString statusCodeStr(
                response->mStatusLine, space1 + 1, space2 - space1 - 1);

        if (!ParseSingleUnsignedLong(
                    statusCodeStr.c_str(), &response->mStatusCode)
                || response->mStatusCode < 100 || response->mStatusCode > 999) {
            return false;
        }
    }

    AString line;
    ssize_t lastDictIndex = -1;
    for (;;) {
        if (!receiveLine(&line)) {
            break;
        }

        if (line.empty()) {
            break;
        }

        ALOGV("line: '%s'", line.c_str());

        if (line.c_str()[0] == ' ' || line.c_str()[0] == '\t') {
            // Support for folded header values.

            if (lastDictIndex < 0) {
                // First line cannot be a continuation of the previous one.
                return false;
            }

            AString &value = response->mHeaders.editValueAt(lastDictIndex);
            value.append(line);

            continue;
        }

        ssize_t colonPos = line.find(":");
        if (colonPos < 0) {
            // Malformed header line.
            return false;
        }

        AString key(line, 0, colonPos);
        key.trim();
        key.tolower();

        line.erase(0, colonPos + 1);
//.........这里部分代码省略.........

bool ARTSPConnection::receiveRTSPReponse() {
    AString statusLine;

    if (!receiveLine(&statusLine)) {
        return false;
    }

    if (statusLine == "$") {
        sp<ABuffer> buffer = receiveBinaryData();

        if (buffer == NULL) {
            return false;
        }

        if (mObserveBinaryMessage != NULL) {
            sp<AMessage> notify = mObserveBinaryMessage->dup();
            notify->setObject("buffer", buffer);
            notify->post();
        } else {
            LOGW("received binary data, but no one cares.");
        }

        return true;
    }

    sp<ARTSPResponse> response = new ARTSPResponse;
    response->mStatusLine = statusLine;

    LOGI("status: %s", response->mStatusLine.c_str());

    ssize_t space1 = response->mStatusLine.find(" ");
    if (space1 < 0) {
        return false;
    }
    ssize_t space2 = response->mStatusLine.find(" ", space1 + 1);
    if (space2 < 0) {
        return false;
    }

    AString statusCodeStr(
            response->mStatusLine, space1 + 1, space2 - space1 - 1);

    if (!ParseSingleUnsignedLong(
                statusCodeStr.c_str(), &response->mStatusCode)
            || response->mStatusCode < 100 || response->mStatusCode > 999) {
        return false;
    }

    AString line;
    for (;;) {
        if (!receiveLine(&line)) {
            break;
        }

        if (line.empty()) {
            break;
        }

        LOGV("line: %s", line.c_str());

        ssize_t colonPos = line.find(":");
        if (colonPos < 0) {
            // Malformed header line.
            return false;
        }

        AString key(line, 0, colonPos);
        key.trim();
        key.tolower();

        line.erase(0, colonPos + 1);
        line.trim();

        response->mHeaders.add(key, line);
    }

    unsigned long contentLength = 0;

    ssize_t i = response->mHeaders.indexOfKey("content-length");

    if (i >= 0) {
        AString value = response->mHeaders.valueAt(i);
        if (!ParseSingleUnsignedLong(value.c_str(), &contentLength)) {
            return false;
        }
    }

    if (contentLength > 0) {
        response->mContent = new ABuffer(contentLength);

        size_t numBytesRead = 0;
        while (numBytesRead < contentLength) {
            ssize_t n = recv(
                    mSocket, response->mContent->data() + numBytesRead,
                    contentLength - numBytesRead, 0);

            if (n == 0) {
                // Server closed the connection.
                TRESPASS();
            } else if (n < 0) {
//.........这里部分代码省略.........

void WifiDisplaySource::onMessageReceived(const sp<AMessage> &msg) {
    switch (msg->what()) {
        case kWhatStart:
        {
            sp<AReplyToken> replyID;
            CHECK(msg->senderAwaitsResponse(&replyID));

            AString iface;
            CHECK(msg->findString("iface", &iface));

            status_t err = OK;

            ssize_t colonPos = iface.find(":");

            unsigned long port;

            if (colonPos >= 0) {
                const char *s = iface.c_str() + colonPos + 1;

                char *end;
                port = strtoul(s, &end, 10);

                if (end == s || *end != '\0' || port > 65535) {
                    err = -EINVAL;
                } else {
                    iface.erase(colonPos, iface.size() - colonPos);
                }
            } else {
                port = kWifiDisplayDefaultPort;
            }

            if (err == OK) {
                if (inet_aton(iface.c_str(), &mInterfaceAddr) != 0) {
                    sp<AMessage> notify = new AMessage(kWhatRTSPNotify, this);

                    err = mNetSession->createRTSPServer(
                            mInterfaceAddr, port, notify, &mSessionID);
                } else {
                    err = -EINVAL;
                }
            }

            mState = AWAITING_CLIENT_CONNECTION;

            sp<AMessage> response = new AMessage;
            response->setInt32("err", err);
            response->postReply(replyID);
            break;
        }

        case kWhatRTSPNotify:
        {
            int32_t reason;
            CHECK(msg->findInt32("reason", &reason));

            switch (reason) {
                case ANetworkSession::kWhatError:
                {
                    int32_t sessionID;
                    CHECK(msg->findInt32("sessionID", &sessionID));

                    int32_t err;
                    CHECK(msg->findInt32("err", &err));

                    AString detail;
                    CHECK(msg->findString("detail", &detail));

                    ALOGE("An error occurred in session %d (%d, '%s/%s').",
                          sessionID,
                          err,
                          detail.c_str(),
                          strerror(-err));

                    mNetSession->destroySession(sessionID);

                    if (sessionID == mClientSessionID) {
                        mClientSessionID = 0;

                        mClient->onDisplayError(
                                IRemoteDisplayClient::kDisplayErrorUnknown);
                    }
                    break;
                }

                case ANetworkSession::kWhatClientConnected:
                {
                    int32_t sessionID;
                    CHECK(msg->findInt32("sessionID", &sessionID));

                    if (mClientSessionID > 0) {
                        ALOGW("A client tried to connect, but we already "
                              "have one.");

                        mNetSession->destroySession(sessionID);
                        break;
                    }

                    CHECK_EQ(mState, AWAITING_CLIENT_CONNECTION);

                    CHECK(msg->findString("client-ip", &mClientInfo.mRemoteIP));
//.........这里部分代码省略.........