我通过将图像转换为base64格式来将图像发送到服务器。但问题是在发送图像字符串后，字符"+"将被空格"替换。显示错误：
Corrupt JPEG data: 214 extraneous bytes before marker
如何解决这个问题？提前感谢您的帮助。
以下是将图像转换为base64格式的代码：
-(NSString*)base64forData:(NSData*)theData {
const uint8_t* input = (const uint8_t*)[theData bytes];
NSInteger length = [theData length];
static char table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
NSMutableData* data = [NSMutableData dataWithLength:((length + 2) / 3) * 4];
uint8_t* output = (uint8_t*)data.mutableBytes;
NSInteger i;
for (i=0; i < length; i += 3) {
NSInteger value = 0;
NSInteger j;
for (j = i; j < (i + 3); j++) {
value <<= 8;
if (j < length) {
value |= (0xFF & input[j]);
}
}
NSInteger theIndex = (i / 3) * 4;
output[theIndex + 0] = table[(value >> 18) & 0x3F];
output[theIndex + 1] = table[(value >> 12) & 0x3F];
output[theIndex + 2] = (i + 1) < length ? table[(value >> 6) & 0x3F] : '=';
output[theIndex + 3] = (i + 2) < length ? table[(value >> 0) & 0x3F] : '=';
}
return [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
}
以下是转换为Json格式的代码&将其发送到服务器：
-(void)setOflynData2JsonFormat{
if (!([self.getOfflineData count] == 0)) {
NSArray *array = [self getOfflineData];
arrayOfJsonString = [[NSMutableArray alloc]init];
for (int i = 0; i<[array count]; i++) {
uniqueId++;
NSNumber *uId = [NSNumber numberWithInt:uniqueId];
OfflineTableObject *offObj = [array objectAtIndex:i];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setValue:uId forKey:@"id"];
[dict setValue:offObj.qrCode forKey:@"qrCode"];
[dict setValue:offObj.offlineStatus forKey:@"activity"];
[dict setValue:offObj.time forKey:@"time"];
[dict setValue:offObj.imageData forKey:@"image_base64"];
[arrayOfJsonString addObject:dict];
}
NSData * jsonDataFromArray = [NSJSONSerialization dataWithJSONObject:arrayOfJsonString
options:kNilOptions
error:nil];
NSString *string = [[NSString alloc] initWithData:jsonDataFromArray encoding:NSUTF8StringEncoding];
//replace backslash from string
NSString *jsonString = [[NSString alloc] init];
NSString *specialChar = @"\";
jsonString = [string stringByReplacingOccurrencesOfString:specialChar withString:@""];
NSLog(@"sent string to server: %@",jsonString);
int lng = [jsonString length];
NSLog(@"2nd string length: %d",lng);
Get_Object_Class *obj = [[Get_Object_Class alloc]init];
NSString *dvid = [[UIDevice currentDevice] uniqueIdentifier];
[obj sendDeviceId:dvid];
NSLog(@"device id: %@",dvid);
int check = [obj sendOfflynData2Server:jsonString];
if (check == 1) {
NSLog(@"Offline data uploaded");
AppDelegate *test = [AppDelegate sharedInstance];
[test resetOfflineTable];
}
else{
NSLog(@"Offline data upload failed");
}
}
else{
NSLog(@"Offline table is empty");
}
}
-(BOOL)sendOfflynData2Server:(NSString *)jsonRequest{
NSHTTPURLResponse * response = nil;
NSError* error = nil;
NSString * post = [NSString stringWithFormat:@"&offline_data=%@",jsonRequest];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL: [NSURL URLWithString:[NSString stringWithFormat: @"%@saveofflinedata.php", APIheader]]];
[request setHTTPMethod:@"POST"];
[request setValue:jsonRequest forHTTPHeaderField:@"offline_data"];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
NSData *dataReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *stringReply = (NSString *)[[NSString alloc] initWithData:dataReply encoding:NSUTF8StringEncoding];
stringReply = [stringReply stringByReplacingOccurrencesOfString:@"(" withString:@"["];
stringReply = [stringReply stringByReplacingOccurrencesOfString:@")" withString:@"]"];
stringReply = [stringReply stringByReplacingOccurrencesOfString:@";" withString:@""];
NSLog(@"stringReply: %@", stringReply);
SBJsonParser *parser = [[SBJsonParser alloc]init];
NSArray *array = [parser objectWithString:stringReply error:nil];
stringReply = [NSString stringWithFormat:@"%@",[[array objectAtIndex:0]objectForKey:@"success"]];
NSLog(@"Success: %@", stringReply);
return [stringReply intValue];
}
这是我发送到服务器的字符串：
NSString * str1 = @"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";
这是服务器中显示的字符串：
NSString *str2 = @"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 Tl5ufo6erx8vP09fb3 Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3 Pn6/9oADAMBAAIRAxEAPwDeprtgdQPc1FdXUdrCZJD9B3JrnZ76S4lLO5C9lB4oEb3nLu4kzTvP2981zq3gTpxT/tp65pDN2e4VogO5NQBFchiASOmaz1ud5Xmr8ByvFAF 3IEQ 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 KYXJNPaCU87DUflSD A/lUljg9OD81H5b/3T VGCD0NAXJw3FOXmolRm6KT FTLHJ/cNKw7liyXNwD6DNaNQ6fbMELMMFqtPEw6VaIZHRThE57U7yX9KBEdJU4tz3NL9m/2qBleipjbt7UUASeQnpTDaoewqeloAqm0T0FN wx56CrlFMCBLWNewp4hQdqkooEAAHSiiigYUtFFABRRRQAUUUUANNHaiigQCloopAFFFFMYUUUUALRRRQAUUUUAFFFFAH//2Q==";
您的+符号在发布数据中不是URL编码的，即使您的内容类型表明它们是URL编码的。
您需要将它们替换为%2B，收件人才能正确获取它们。
为什么不将UIImage转换为NSData，将NSData转换为base64？
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
NSString *base64string = [imageData base64EncodedString];
只需实现许多NSData类别中的一个，如以下类别：https://github.com/l4u/NSData-Base64