在JSON请求中不能正确发送Base64图像 - Image Base64 not getting Sent Correctly in JSON Request

我正在发送base64中的JSON POST请求到php服务器的图像。回答是Ok。但是空格被添加到base64字符串中。所以当我尝试解码base64时，它失败了。不知道问题出在哪里。我正在制作iPad应用程序，并从iPad模拟器发送请求。

让我知道，如果你有任何想法可能是错的。谢谢。

下面是我用来发送请求的ASIRequest代码-

ASIFormDataRequest *asiRequest = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:urlForAPI]];
[asiRequest setTimeOutSeconds:200];
NSMutableDictionary *requestheaders =[[[NSMutableDictionary alloc]init] autorelease];
[requestheaders setValue:@"application/x-www-form-urlencoded; charset=utf-8" forKey:@"Content-Type"];
NSData *jsonData = [data JSONData];
NSString *string = [[[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding] autorelease];
[asiRequest setRequestHeaders:requestheaders];
NSString *jsonString = [NSString stringWithFormat:@"REQUEST=%@",string];
NSData *requestData = [NSData dataWithBytes:[jsonString UTF8String] length:[jsonString length]];
[asiRequest setPostBody:[NSMutableData dataWithData:requestData]];
[asiRequest setShouldContinueWhenAppEntersBackground:YES];
[asiRequest setDelegate:self];
[asiRequest setRequestMethod:@"POST"];
[asiRequest setDidFailSelector:@selector(uploadFailed:)];
[asiRequest setDidFinishSelector:@selector(uploadFinished:)];
[asiRequest startSynchronous];

try this

it declare on top:

   static const char _base64EncodingTable[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    /Write this code when you pass the string.
         NSData *imageData =  UIImagePNGRepresentation(YourImageView.image);
         NSString *imageString = [self encodeBase64WithData:imageData];
  //  only pass this imageStirng using NSUTF8StringEncoding instead of UTF8String

没有其他参数，只检查图片是否上传。这是我的工作。

   YourUrl= [[YourUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding] dataUsingEncoding:NSUTF8StringEncoding]

    - (NSString *)encodeBase64WithData:(NSData *)objData {
        const unsigned char * objRawData = [objData bytes];
        char * objPointer;
        char * strResult;
        // Get the Raw Data length and ensure we actually have data
        int intLength = [objData length];
        if (intLength == 0) return nil;
        // Setup the String-based Result placeholder and pointer within that placeholder
        strResult = (char *)calloc((((intLength + 2) / 3) * 4) + 1, sizeof(char));
        objPointer = strResult;
        // Iterate through everything
        while (intLength > 2) { // keep going until we have less than 24 bits
            *objPointer++ = _base64EncodingTable[objRawData[0] >> 2];
            *objPointer++ = _base64EncodingTable[((objRawData[0] & 0x03) << 4) + (objRawData[1] >> 4)];
            *objPointer++ = _base64EncodingTable[((objRawData[1] & 0x0f) << 2) + (objRawData[2] >> 6)];
            *objPointer++ = _base64EncodingTable[objRawData[2] & 0x3f];
            // we just handled 3 octets (24 bits) of data
            objRawData += 3;
            intLength -= 3;
        }
        // now deal with the tail end of things
        if (intLength != 0) {
            *objPointer++ = _base64EncodingTable[objRawData[0] >> 2];
            if (intLength > 1) {
                *objPointer++ = _base64EncodingTable[((objRawData[0] & 0x03) << 4) + (objRawData[1] >> 4)];
                *objPointer++ = _base64EncodingTable[(objRawData[1] & 0x0f) << 2];
                *objPointer++ = '=';
            } else {
                *objPointer++ = _base64EncodingTable[(objRawData[0] & 0x03) << 4];
                *objPointer++ = '=';
                *objPointer++ = '=';
            }
        }
        // Terminate the string-based result
        *objPointer = ''0';
        // Return the results as an NSString object
        return [NSString stringWithCString:strResult encoding:NSASCIIStringEncoding];
    }

它可能对你有帮助。也有可能在服务器上获取图像有问题。