在可可应用程序中使用 xmpp 发送任何文件。是不是可以？

Posted 2023-02-24

【中文标题】在可可应用程序中使用 xmpp 发送任何文件。是不是可以？

【英文标题】：Send any file using xmpp in cocoa application. Is it possible?在可可应用程序中使用 xmpp 发送任何文件。是否可以？

【发布时间】：2014-10-17 08:04:34

【问题描述】：

在我的聊天应用程序中，我无法在聊天时发送任何图像或文件。我尝试的是---

方法一……

NSXMLElement *body = [NSXMLElement elementWithName:@"body"];
[body setStringValue:@"Send Image Testing"];

NSXMLElement *message = [NSXMLElement elementWithName:@"message"];
[message addAttributeWithName:@"type" stringValue:@"chat"];
[message addAttributeWithName:@"to" stringValue:[jid full]];
[message addAttributeWithName:@"from" stringValue:[[xmppStream myJID] full]];
[message addChild:body];

NSImage *img = [NSImage imageNamed:@"loginLogo.png"];
NSData *imageData = [img TIFFRepresentation];
NSBitmapImageRep *imageRep = [NSBitmapImageRep imageRepWithData:imageData];

NSData *data = [imageRep representationUsingType:NSJPEGFileType properties:nil];
NSString *imgStr = [NSString encodeBase64WithData:data];

NSXMLElement *ImgAttachement = [NSXMLElement elementWithName:@"attachment"];
[ImgAttachement setStringValue:imgStr];
[message addChild:ImgAttachement];

[xmppStream sendElement:message];

我在“消息”xmlElement 中添加了一个名为“附件”的“xmlElement”。 “附件”的字符串值是以“Base64”格式编码的 ImageDataString。但是此代码仅将文本发送到另一端（而不是图像）。

不知道失败的原因，可能是我应该发送图像的 NSImage 或服务器链接来代替图像数据。

方法2...

我还尝试了“XMPPOutgoingFileTransfer”类，代码如下。

[_fileTransfer sendData:decodedData 
                       named:@"hello"
                 toRecipient:[XMPPJID jidWithString:@"[e-mail]/RESOURCENAME"]
                 description:@"Baal's Soulstone, obviously."
                       error:&err])

但每次都会出现同样的错误 - Error Domain=XMPPOutgoingFileTransferErrorDomain Code=-1 "Unable to send SI offer; the recipient doesn't have the required features."

如果有任何想法，请帮忙 提前致谢

【问题讨论】：

你的问题我们还不清楚，这段代码到底发生了什么错误，是的，是的，是的，是的，是别的什么？？？

@Tirth 当我编辑我的问题时，我可以使用上述方法发送文本，但问题是 ----- 没有发送图像。如果您有任何想法，请提供帮助

【参考方案1】：

我是这样工作的——

在setupStrem方法里面，这样设置传入端-

xmppIncomingFileTransfer = [[XMPPIncomingFileTransfer alloc] init];
xmppIncomingFileTransfer.disableIBB = NO;
xmppIncomingFileTransfer.disableSOCKS5 = NO;
[xmppIncomingFileTransfer   activate:xmppStream];

[xmppIncomingFileTransfer addDelegate:self delegateQueue:dispatch_get_main_queue()];

实现传入的结束委托方法-

- (void)xmppIncomingFileTransfer:(XMPPIncomingFileTransfer *)sender  didFailWithError:(NSError *)error

    DDLogVerbose(@"%@: Incoming file transfer failed with error: %@", THIS_FILE, error);


- (void)xmppIncomingFileTransfer:(XMPPIncomingFileTransfer *)sender  didReceiveSIOffer:(XMPPIQ *)offer

    DDLogVerbose(@"%@: Incoming file transfer did receive SI offer. Accepting...", THIS_FILE);
    [sender acceptSIOffer:offer];


- (void)xmppIncomingFileTransfer:(XMPPIncomingFileTransfer *)sender  didSucceedWithData:(NSData *)data
                   named:(NSString *)name

    DDLogVerbose(@"%@: Incoming file transfer did succeed.", THIS_FILE);

    NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *fullPath = [[paths lastObject] stringByAppendingPathComponent:name];
    [data writeToFile:fullPath options:0 error:nil];

    DDLogVerbose(@"%@: Data was written to the path: %@", THIS_FILE, fullPath);

传入的文件将被写入文档目录，完成后您可以更新 UI。

在发送方-

if (!_fileTransfer) 
        _fileTransfer = [[XMPPOutgoingFileTransfer alloc] initWithDispatchQueue:dispatch_get_main_queue()];

        AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

        [_fileTransfer activate:appDelegate.xmppStream];
        _fileTransfer.disableIBB = NO;
        _fileTransfer.disableSOCKS5 = NO;

        [_fileTransfer addDelegate:self delegateQueue:dispatch_get_main_queue()];
    

    NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,  NSUserDomainMask, YES);
    NSString *fullPath = [[paths lastObject] stringByAppendingPathComponent:filename];
    NSData *data = [NSData dataWithContentsOfFile:fullPath];

    NSError *err;
    if (![_fileTransfer sendData:data  named:filename  toRecipient:[XMPPJID jidWithString:self.contact.primaryResource.jidStr] description:@"Baal's Soulstone, obviously."  error:&err]) 
        DDLogInfo(@"You messed something up: %@", err);
    

实现传出委托方法 -

- (void)xmppOutgoingFileTransfer:(XMPPOutgoingFileTransfer *)sender  didFailWithError:(NSError *)error

    DDLogInfo(@"Outgoing file transfer failed with error: %@", error);
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"  message:@"There was an error sending your file. See the logs."  delegate:nil   cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];


- (void)xmppOutgoingFileTransferDidSucceed:(XMPPOutgoingFileTransfer *) sender

    DDLogVerbose(@"File transfer successful.");
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Success!"  message:@"Your file was sent successfully." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];

注意disableIBB 和disableSOCKS5 两端应该匹配。 如果问题依然存在，去XMPPOutgoingFileTransfer.m再去方法-

 - (void)handleRecipientDiscoInfoQueryIQ:(XMPPIQ *)iq withInfo:(XMPPBasicTrackingInfo *)info

然后在这一行放置一个 NSLOG/Breakpoint - hasSOCKS5 = hasSI && hasFT && hasSOCKS5; hasIBB = hasSI && hasFT && hasIBB;

发送文件时，这两个值都应为 TRUE。检查哪个是 FALSE（导致错误），您将了解为什么传入端立即发送 FALSE。尝试解决这个问题。

【讨论】：

我阅读了您的答案，但在 xmpp 演示中找不到 setupStrem 方法