在Android中使用asmack实现文件的接收和发送

本篇主要是基于最近帮助朋友在 Android 中使用 asmack 库实现文件的接收和发送功能时，写了个参考示例，这里做个记录，以便于自己以后参考。

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文件传输相关的XEP协议参考:

2【XEP-0095】StreamInitiation: http://xmpp.org/extensions/xep-0095.html

2【XEP-0096】SI FileTransfer: http://xmpp.org/extensions/xep-0096.html

2【XEP-0030】ServiceDiscovery: http://xmpp.org/extensions/xep-0030.html

2【XEP-0065】SOCKS5Bytestreams: http://xmpp.org/extensions/xep-0065.html

2【XEP-0066】Out of BandData: http://xmpp.org/extensions/xep-0066.html

2【XEP-0047】In-BandBytestreams: http://xmpp.org/extensions/xep-0047.html

本实例中主要采用的是SI + IBB 的方式发送和接收文件。

1，首先在连接和登录之前设置 ProviderManager，同时设置好全局的文件传输管理器(FileTransferManager) fileTransferManager，如下：

/**
*登录 IM 服务器，同时负责连接和登录
*/
public boolean login(String user, String password)
{
ConnectionConfiguration conf = new ConnectionConfiguration(
IM_HOST, IM_PORT, IM_SERVICE_NAME);
conf.setDebuggerEnabled(true);
conf.setCompressionEnabled(false);
conf.setSendPresence(true);
conf.setSASLAuthenticationEnabled(false);
conf.setSecurityMode(ConnectionConfiguration.SecurityMode.disabled);
connection = new XMPPConnection(conf);

ProviderManager pm = ProviderManager.getInstance();

// Private Data Storage
pm.addIQProvider("query", "jabber:iq:private", new PrivateDataManager.PrivateDataIQProvider());

// Roster Exchange
pm.addExtensionProvider("x", "jabber:x:roster", new RosterExchangeProvider());

// Message Events
pm.addExtensionProvider("x", "jabber:x:event", new MessageEventProvider());

// Chat State
pm.addExtensionProvider("active", "http://jabber.org/protocol/chatstates", new ChatStateExtension.Provider());
pm.addExtensionProvider("composing", "http://jabber.org/protocol/chatstates", new ChatStateExtension.Provider());
pm.addExtensionProvider("paused", "http://jabber.org/protocol/chatstates", new ChatStateExtension.Provider());
pm.addExtensionProvider("inactive", "http://jabber.org/protocol/chatstates", new ChatStateExtension.Provider());
pm.addExtensionProvider("gone", "http://jabber.org/protocol/chatstates", new ChatStateExtension.Provider());

// XHTML
pm.addExtensionProvider("html", "http://jabber.org/protocol/xhtml-im", new XHTMLExtensionProvider());

// Group Chat Invitations
pm.addExtensionProvider("x", "jabber:x:conference", new GroupChatInvitation.Provider());

// Service Discovery # Items
pm.addIQProvider("query", "http://jabber.org/protocol/disco#items", new DiscoverItemsProvider());

// Service Discovery # Info
pm.addIQProvider("query", "http://jabber.org/protocol/disco#info", new DiscoverInfoProvider());

// Data Forms
pm.addExtensionProvider("x", "jabber:x:data", new DataFormProvider());

// MUC User
pm.addExtensionProvider("x", "http://jabber.org/protocol/muc#user", new MUCUserProvider());

// MUC Admin
pm.addIQProvider("query", "http://jabber.org/protocol/muc#admin", new MUCAdminProvider());

// MUC Owner
pm.addIQProvider("query", "http://jabber.org/protocol/muc#owner", new MUCOwnerProvider());

// Delayed Delivery
pm.addExtensionProvider("x", "jabber:x:delay", new DelayInformationProvider());

// Version
try {
pm.addIQProvider("query", "jabber:iq:version",
Class.forName("org.jivesoftware.smackx.packet.Version"));
} catch (ClassNotFoundException e) {
// Not sure what's happening here.
}

// VCard
pm.addIQProvider("vCard", "vcard-temp", new VCardProvider());

// Offline Message Requests
pm.addIQProvider("offline", "http://jabber.org/protocol/offline", new OfflineMessageRequest.Provider());

// Offline Message Indicator
pm.addExtensionProvider("offline", "http://jabber.org/protocol/offline", new OfflineMessageInfo.Provider());

// Last Activity
pm.addIQProvider("query", "jabber:iq:last", new LastActivity.Provider());

// User Search
pm.addIQProvider("query", "jabber:iq:search", new UserSearch.Provider());

// SharedGroupsInfo
pm.addIQProvider("sharedgroup", "http://www.jivesoftware.org/protocol/sharedgroup", new SharedGroupsInfo.Provider());

// JEP-33: Extended Stanza Addressing
pm.addExtensionProvider("addresses", "http://jabber.org/protocol/address", new MultipleAddressesProvider());

// FileTransfer
pm.addIQProvider("si", "http://jabber.org/protocol/si", new StreamInitiationProvider());
pm.addIQProvider("query", "http://jabber.org/protocol/bytestreams", new BytestreamsProvider());

// Privacy
pm.addIQProvider("query", "jabber:iq:privacy", new PrivacyProvider());

pm.addIQProvider("command", "http://jabber.org/protocol/commands",
new AdHocCommandDataProvider());

pm.addExtensionProvider("malformed-action",
"http://jabber.org/protocol/commands",
new AdHocCommandDataProvider.MalformedActionError());

pm.addExtensionProvider("bad-locale",
"http://jabber.org/protocol/commands",
new AdHocCommandDataProvider.BadLocaleError());

pm.addExtensionProvider("bad-payload",
"http://jabber.org/protocol/commands",
new AdHocCommandDataProvider.BadPayloadError());

pm.addExtensionProvider("bad-sessionid",
"http://jabber.org/protocol/commands",
new AdHocCommandDataProvider.BadSessionIDError());

pm.addExtensionProvider("session-expired",
"http://jabber.org/protocol/commands",
new AdHocCommandDataProvider.SessionExpiredError());

try
{
connection.connect();
connection.login(user, password);
}
catch (XMPPException e)
{
e.printStackTrace();
connection = null;
return false;
}

fileTransferManager = new FileTransferManager(connection);
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
if (sdm == null)
sdm = new ServiceDiscoveryManager(connection);
sdm.addFeature("http://jabber.org/protocol/disco#info");
sdm.addFeature("jabber:iq:privacy");
FileTransferNegotiator.setServiceEnabled(connection, true);
return true;
}

2，发送文件，如下：

Button btnSendFile = (Button) rootView.findViewById(R.id.send_file_btn);
btnSendFile.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Toast.makeText(getActivity(), "send file", Toast.LENGTH_SHORT).show();
new SendFileTask().execute(new Uri[]{ uriFile });
}
});

//将发送文件的操作采用 AsyncTask 的方式实现（SendFileTask）：
public class SendFileTask extends AsyncTask {

@Override
protected Long doInBackground(Uri... params) {

if (params.length < 1) {
return Long.valueOf(-1);
}

Uri uriFile = params[0];
FileTransferManager ftm = MainHelloIM.getInstance().getFileTransferManager();
if (ftm != null)
{
OutgoingFileTransfer oft = ftm.createOutgoingFileTransfer("blue@test.cn/Spark");
try
{
String[] proj = { MediaStore.Images.Media.DATA };
Cursor actualp_w_picpathcursor = managedQuery(uriFile,proj,null,null,null);
int actual_p_w_picpath_column_index
= actualp_w_picpathcursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
actualp_w_picpathcursor.moveToFirst();
String filePath = actualp_w_picpathcursor.getString(actual_p_w_picpath_column_index);
File fileToSend = new File(filePath);
if (fileToSend.exists())
{
oft.sendFile(fileToSend, "recv my file!");
while (!oft.isDone())
{
if (oft.getStatus().equals(FileTransfer.Status.error))
{
Log.e(TAG, "send failed");
}
else
{
Log.i(TAG, "status:" + oft.getStatus() + "|progress:" + oft.getProgress());
}
Thread.sleep(1000);
}
}
}
catch (XMPPException e)
{
e.printStackTrace();
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}

return Long.valueOf(0);
}
}

3，接收文件，主要通过设置文件传输监听器来实现：

FileTransferManager ftm = MainHelloIM.getInstance().getFileTransferManager();
ftm.addFileTransferListener(new FileTransferListener()
{
@Override
public void fileTransferRequest(FileTransferRequest fileTransferRequest)
{
Log.i(TAG, "has file");
IncomingFileTransfer transfer = fileTransferRequest.accept();
File sdDir = Environment.getExternalStorageDirectory();
String filePath = sdDir.toString() + "/" + fileTransferRequest.getFileName();
try
{
transfer.recieveFile(new File(filePath));
}
catch (XMPPException e)
{
e.printStackTrace();
}
}
});

下面为完整的文件传输的消息交互流程：

/**
*前面主要遵循标准 XEP-0095 来协商采用的文件传输方式
*/

//----- negotiation profile and stream

hhy -> blue
// hhy需要发送 p_w_picpath/png 格式的文件 bookCater.png 给 blue

id="jsi_7839940461539037483"
mime-type="p_w_picpath/png"
profile="http://jabber.org/protocol/si/profile/file-transfer">

recv my file!

blue -> hhy
// blue返回的结果显示 blue 支持 bytestreams 和 ibb 两种方式传输文件

http://jabber.org/protocol/bytestreams
http://jabber.org/protocol/ibb

//----- service discovery

hhy -> blue

blue -> hhy

hhy -> [server]

blue -> hhy

[server] -> hhy

hhy -> [server proxy]

[server proxy] -> hhy

hhy -> [server pubsub]

[server pubsub] -> hhy

hhy -> [server search]

[server search] -> hhy

hhy -> [server conference]

[server conference] -> hhy

//-----首先是采用 bytestreams 方式传输文件的

hhy -> [server proxy]

[server proxy] -> hhy

hhy -> blue
//这里要求 blue 采用 proxy server 方式来传输文件

blue -> hhy
//可以看到 blue 无法连接到代理服务器，并返回了 404 的错误响应

Could not establish socket with any provided host

//-----上面方式不行，采用 IBB 方式传输

hhy -> blue
//在上面无法采用代理服务器的方式后，这里协商采用 IBB 的方式来传输文件
// 并且这里提示会采用 iq stanza 来传输文件内容

blue -> hhy
// blue确认采用此方式传输文件

hhy -> blue
// hhy使用 iq/data 方式来传输文件

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

blue -> hhy
//确认已经接收完成

hhy -> blue
// hhy关闭本次传输

blue -> hhy
//本次文件传输结束

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