C++ AString::insert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, "-");
	}
}

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, "-");
	}
}

void ARTSPConnection::onSendRequest(const sp<AMessage> &msg) {
    sp<AMessage> reply;
    CHECK(msg->findMessage("reply", &reply));

    if (mState != CONNECTED) {
        reply->setInt32("result", -ENOTCONN);
        reply->post();
        return;
    }

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

    // Find the boundary between headers and the body.
    ssize_t i = request.find("\r\n\r\n");
    CHECK_GE(i, 0);

    int32_t cseq = mNextCSeq++;

    AString cseqHeader = "CSeq: ";
    cseqHeader.append(cseq);
    cseqHeader.append("\r\n");

    request.insert(cseqHeader, i + 2);

    LOGV("%s", request.c_str());

    size_t numBytesSent = 0;
    while (numBytesSent < request.size()) {
        ssize_t n =
            send(mSocket, request.c_str() + numBytesSent,
                 request.size() - numBytesSent, 0);

        if (n == 0) {
            // Server closed the connection.
            LOGE("Server unexpectedly closed the connection.");

            reply->setInt32("result", ERROR_IO);
            reply->post();
            return;
        } else if (n < 0) {
            if (errno == EINTR) {
                continue;
            }

            LOGE("Error sending rtsp request.");
            reply->setInt32("result", -errno);
            reply->post();
            return;
        }

        numBytesSent += (size_t)n;
    }

    mPendingRequests.add(cseq, reply);
}

status_t MediaCodecList::includeXMLFile(const char **attrs) {
    const char *href = NULL;
    size_t i = 0;
    while (attrs[i] != NULL) {
        if (!strcmp(attrs[i], "href")) {
            if (attrs[i + 1] == NULL) {
                return -EINVAL;
            }
            href = attrs[i + 1];
            ++i;
        } else {
            return -EINVAL;
        }
        ++i;
    }

    // For security reasons and for simplicity, file names can only contain
    // [a-zA-Z0-9_.] and must start with  media_codecs_ and end with .xml
    for (i = 0; href[i] != '\0'; i++) {
        if (href[i] == '.' || href[i] == '_' ||
                (href[i] >= '0' && href[i] <= '9') ||
                (href[i] >= 'A' && href[i] <= 'Z') ||
                (href[i] >= 'a' && href[i] <= 'z')) {
            continue;
        }
        ALOGE("invalid include file name: %s", href);
        return -EINVAL;
    }

    AString filename = href;
    if (!filename.startsWith("media_codecs_") ||
        !filename.endsWith(".xml")) {
        ALOGE("invalid include file name: %s", href);
        return -EINVAL;
    }
    filename.insert(mHrefBase, 0);

    parseXMLFile(filename.c_str());
    return mInitCheck;
}

void ARTSPConnection::onSendRequest(const sp<AMessage> &msg) {
    sp<AMessage> reply;
    CHECK(msg->findMessage("reply", &reply));

    if (mState != CONNECTED) {
        reply->setInt32("result", -ENOTCONN);
        reply->post();
        return;
    }

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

    // Just in case we need to re-issue the request with proper authentication
    // later, stash it away.
    reply->setString("original-request", request.c_str(), request.size());

    addAuthentication(&request);
    addUserAgent(&request);

    // Find the boundary between headers and the body.
    ssize_t i = request.find("\r\n\r\n");
    CHECK_GE(i, 0);

    int32_t cseq = mNextCSeq++;

    AString cseqHeader = "CSeq: ";
    cseqHeader.append(cseq);
    cseqHeader.append("\r\n");

    request.insert(cseqHeader, i + 2);

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

    size_t numBytesSent = 0;
    while (numBytesSent < request.size()) {
        ssize_t n =
            send(mSocket, request.c_str() + numBytesSent,
                 request.size() - numBytesSent, 0);

        if (n < 0 && errno == EINTR) {
            continue;
        }

        if (n <= 0) {
            performDisconnect();

            if (n == 0) {
                // Server closed the connection.
                ALOGE("Server unexpectedly closed the connection.");

                reply->setInt32("result", ERROR_IO);
                reply->post();
            } else {
                ALOGE("Error sending rtsp request. (%s)", strerror(errno));
                reply->setInt32("result", -errno);
                reply->post();
            }

            return;
        }

        numBytesSent += (size_t)n;
    }

    mPendingRequests.add(cseq, reply);
}

bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_ServerId, AString & a_UUID, Json::Value & a_Properties)
{
	LOGD("Trying to authenticate user %s", a_UserName.c_str());

	// Create the GET request:
	AString ActualAddress = m_Address;
	ReplaceString(ActualAddress, "%USERNAME%", a_UserName);
	ReplaceString(ActualAddress, "%SERVERID%", a_ServerId);

	AString Request;
	Request += "GET " + ActualAddress + " HTTP/1.0\r\n";
	Request += "Host: " + m_Server + "\r\n";
	Request += "User-Agent: MCServer\r\n";
	Request += "Connection: close\r\n";
	Request += "\r\n";

	AString Response;
	if (!SecureGetFromAddress(StarfieldCACert(), m_Server, Request, Response))
	{
		return false;
	}

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

	// Erase the HTTP headers from the response:
	size_t idxHeadersEnd = Response.find("\r\n\r\n");
	if (idxHeadersEnd == AString::npos)
	{
		LOGINFO("User %s failed to authenticate, bad HTTP response header received", a_UserName.c_str());
		LOGD("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
		return false;
	}
	Response.erase(0, idxHeadersEnd + 4);

	// Parse the Json response:
	if (Response.empty())
	{
		return false;
	}
	Json::Value root;
	Json::Reader reader;
	if (!reader.parse(Response, root, false))
	{
		LOGWARNING("cAuthenticator: Cannot parse received data (authentication) to JSON!");
		return false;
	}
	a_UserName = root.get("name", "Unknown").asString();
	a_UUID = root.get("id", "").asString();
	a_Properties = root["properties"];

	// If the UUID doesn't contain the hashes, insert them at the proper places:
	if (a_UUID.size() == 32)
	{
		a_UUID.insert(8, "-");
		a_UUID.insert(13, "-");
		a_UUID.insert(18, "-");
		a_UUID.insert(23, "-");
	}

	return true;
}

void ARTSPConnection::onSendRequest(const sp<AMessage> &msg) {
#ifndef ANDROID_DEFAULT_CODE
    int32_t backup;
    if (msg->findInt32("backup-keep-tcp", &backup)) {
        mForceQuitTCP = backup;
    }
#endif
    sp<AMessage> reply;
    CHECK(msg->findMessage("reply", &reply));

    if (mState != CONNECTED) {
        reply->setInt32("result", -ENOTCONN);
        reply->post();
        return;
    }

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

    // Just in case we need to re-issue the request with proper authentication
    // later, stash it away.
    reply->setString("original-request", request.c_str(), request.size());
#ifndef ANDROID_DEFAULT_CODE
    // mtk80902: ALPS01139972 - SETUP resp with a wrong Session "xxx\0\0\0.."
    // so the followed \r\n is ignored by find's strstr operation
    if (request.find("\r\n\r\n") < 0) {
        ALOGW("what the hell with this req?");  // seems print str is useless..
        reply->setInt32("result", -EBADMSG);
        reply->post();
        return;
    }
#endif
    addAuthentication(&request);
    addUserAgent(&request);

    // Find the boundary between headers and the body.
    ssize_t i = request.find("\r\n\r\n");
    CHECK_GE(i, 0);

    int32_t cseq = mNextCSeq++;

    AString cseqHeader = "CSeq: ";
    cseqHeader.append(cseq);
    cseqHeader.append("\r\n");

    request.insert(cseqHeader, i + 2);

#ifndef ANDROID_DEFAULT_CODE
    ALOGI("request: '%s'", request.c_str());
#else
    ALOGV("request: '%s'", request.c_str());
#endif

    size_t numBytesSent = 0;
    while (numBytesSent < request.size()) {
        ssize_t n =
#ifndef ANDROID_DEFAULT_CODE
            send(mSocket, request.c_str() + numBytesSent,
                 request.size() - numBytesSent, MTK_SEND_FLAG);
#else
            send(mSocket, request.c_str() + numBytesSent,
                 request.size() - numBytesSent, 0);
#endif

        if (n < 0 && errno == EINTR) {
            continue;
        }

        if (n <= 0) {
            performDisconnect();

            if (n == 0) {
                // Server closed the connection.
                ALOGE("Server unexpectedly closed the connection.");

                reply->setInt32("result", ERROR_IO);
                reply->post();
            } else {
                ALOGE("Error sending rtsp request. (%s)", strerror(errno));
                reply->setInt32("result", -errno);
                reply->post();
            }

            return;
        }

        numBytesSent += (size_t)n;
    }

    mPendingRequests.add(cseq, reply);
#ifndef ANDROID_DEFAULT_CODE 
    sp<AMessage> timeout = new AMessage(kWhatTimeout, id());
    timeout->setInt32("cseq", cseq);
    int64_t t;
    if (reply->findInt64("timeout", &t)) {
        timeout->post(t);
    } else {
        timeout->post(kRequestTimeout);
    }
#endif // #ifndef ANDROID_DEFAULT_CODE
//.........这里部分代码省略.........