XMPPFramework - 上传个人资料或头像图片

Question

我正在使用我使用xmpp框架的聊天应用程序.我可以通过xmpp发送或接收消息.但是,当我尝试使用以下代码上传用户个人资料或头像图像时,没有获得成功.

NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:stringPath]];
UIImage *tmpImage = [[UIImage alloc] initWithData:data];
UIImageView *thumbimage;
thumbimage.image = tmpImage;

NSData *imageData1 = UIImageJPEGRepresentation(thumbimage.image,0.5);
NSXMLElement *vCardXML = [NSXMLElement elementWithName:@"vCard" xmlns:@"vcard-temp"];
NSXMLElement *photoXML = [NSXMLElement elementWithName:@"PHOTO"];
NSXMLElement *typeXML = [NSXMLElement elementWithName:@"TYPE" stringValue:@"image/jpeg"];
NSXMLElement *binvalXML = [NSXMLElement elementWithName:@"BINVAL" stringValue:[[NSString alloc] initWithData:imageData1 encoding:NSUTF8StringEncoding]];

[photoXML addChild:typeXML];
[photoXML addChild:binvalXML];
[vCardXML addChild:photoXML];

XMPPvCardTemp *myvCardTemp = [[[self appDelegate] xmppvCardTempModule] myvCardTemp];

if (myvCardTemp) {
    [myvCardTemp setPhoto:imageData1];
    [[[self appDelegate] xmppvCardTempModule] updateMyvCardTemp:myvCardTemp];
}

请帮我实现上传图像概念到XMPP或纠正我如果我在代码中做错了什么.

提前致谢.

Answer 1

尝试将图像转换为Base64字符串值,BINVAL而不是使用UTF-8编码.

请参阅:在iOS中将图像转换为Base64字符串

XML语法

根据文档,要求使用Base64:

The <PHOTO/> element SHOULD contain a <BINVAL/> child whose XML character data is Base64-encoded data for the avatar image.

图像限制

The image data MUST conform to the base64Binary datatype [7] and thus be encoded in accordance with Section 6.8 of RFC 2045 [8], which recommends that base64 data should have lines limited to at most 76 characters in length. However, any whitespace characters (e.g., '\r' and '\n') MUST be ignored.

另请参阅:XEP-0153:基于vCard的头像XML语法

Answer 2

您好我成功使用您的代码上传了我的头像但有一些更改:

UIImage *tmpImage = [UIImage imageNamed: @"myimage.jpg"];

NSData *imageData1 = UIImageJPEGRepresentation(tmpImage,0.0);

NSXMLElement *vCardXML = [NSXMLElement elementWithName:@"vCard" xmlns:@"vcard-temp"];
NSXMLElement *photoXML = [NSXMLElement elementWithName:@"PHOTO"];
NSXMLElement *typeXML = [NSXMLElement elementWithName:@"TYPE" stringValue:@"image/jpg"];

NSString *image64 = [self encodeToBase64String:tmpImage];

NSXMLElement *binvalXML = [NSXMLElement elementWithName:@"BINVAL" stringValue:image64];

[photoXML addChild:typeXML];
[photoXML addChild:binvalXML];
[vCardXML addChild:photoXML];


XMPPvCardTemp *myvCardTemp = [[[self appDelegate] xmppvCardTempModule] myvCardTemp];

if (myvCardTemp) {
    [myvCardTemp setPhoto:imageData1];
    [[[self appDelegate] xmppvCardTempModule] updateMyvCardTemp:myvCardTemp];
}

正如Keith建议的那样,这个类转换为base64

- (NSString *)encodeToBase64String:(UIImage *)image {
    return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
}

此外,我修改了XMPPvCardTemp.h来公开这个方法:

- (void)setPhoto:(NSData *)data;

无论如何,XEP-0054扩展头

#import "XMPPvCardTemp.h"

请求.

也许这对某人有帮助.