Tumblr API - how to upload multiple images to a Photoset

Question

I am able to upload one picture but I can't create a photoset with multiple images using API.

Documentation says: Paramater: Array (URL-encoded binary contents)

One or more image files (submit multiple times to create a slide show)

Does anyone know how to do it?

Answer 1

It's kind of a painful process, but I figured it out after studying the python code Tumblr posted. In short, it requires getting the hexadecimal for the photo and then doing some substitutions.

I've created a simple iOS / iPad / iPhone project on GitHub that uploads multiple photos to photosets using the Tumblr API, based heavily on the ASIHTTPRequest+OAuth project. It works so far in my limited testing -- feel free to make use of it and let me know how it goes.

Answer 2

The new PhotoUpLink for iPhone uploads true Tumblr photosets. It is a free download from the App Store at http://uplink.to/5o example photosets at http://photouplink.tumblr.com

The Tumblr uploader is based on @VictorVanHee's epic. I did optimize the code by switching to straight C for the NSData stringWithoutURLEncoding subroutine:

- (NSString *) stringWithoutURLEncoding
{
    NSString *hexDataDesc = [self description];
    hexDataDesc = [[hexDataDesc stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]] stringByReplacingOccurrencesOfString:@" " withString:@""];

    int hlen = [hexDataDesc length];

    NSString *hexDataDescU = [hexDataDesc uppercaseString];

    const char *hexcString = [hexDataDescU cStringUsingEncoding:NSASCIIStringEncoding];

    char *newStringC = malloc(hlen *3);
    memset(newStringC, 0, hlen *3); 

    int xC= 0, upd = 3000, value = 0;

    char *componentC = malloc(5);   // = "XX";

    componentC[2] = 0;

    const char *px = "%x"; char ptc = '%';

    for (int x=0; x<hlen; x+=2)
    {                           
        componentC[0] = hexcString[x];
        componentC[1] = hexcString[x+1];

        value = 0;
        sscanf(componentC, px, &value);
        if ((value <=46 && value >= 45) || (value <=57 && value >= 48) || (value <=90 && value >= 65) || (value == 95) || (value <=122 && value >= 97)) //48-57, 65-90, 97-122
        {  
            newStringC[xC++] = (char)value;
        }
        else
        {
            newStringC[xC++] = ptc;
            newStringC[xC++] = (char)componentC[0];
            newStringC[xC++] = (char)componentC[1];
        }
    }

    NSString *newString = [NSString stringWithCString:newStringC encoding:NSASCIIStringEncoding];
    NSString *aNewString = [newString stringByReplacingOccurrencesOfString:@"%20" withString:@"+"];

    free (newStringC);
    free (componentC);

    return aNewString;
}