Option to allow content type in mulipart parameters

[kand617]

Hi,

It would be great if Unirest can allow sending of content types each part in the multipart formdata
In the file : UNIHTTPClientHelper.m

 if ([requestWithBody body] == nil) {
            // Has parameters
            NSDictionary* parameters = [requestWithBody parameters];
            bool isBinary = [UNIHTTPClientHelper hasBinaryParameters:parameters];
            if (isBinary) {

                [headers setObject:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", BOUNDARY] forKey:@"content-type"];

                for(id key in parameters) {
                    id value = [parameters objectForKey:key];
                    if ([value isKindOfClass:[NSURL class]] && value != nil) { // Don't encode files and null values
                        [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", BOUNDARY] dataUsingEncoding:NSUTF8StringEncoding]];
                        NSString* filename = [[value absoluteString] lastPathComponent];

                        NSData* data = [NSData dataWithContentsOfURL:value];

                        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", key, filename] dataUsingEncoding:NSUTF8StringEncoding]];
                        [body appendData:[[NSString stringWithFormat:@"Content-Length: %d\r\n\r\n", data.length] dataUsingEncoding:NSUTF8StringEncoding]];
                        [body appendData:data];
                    } else {

if(value is of type nsdict){
//Check here if value is a dictionary.... the keys could be : "content-type", "value"
}else{
                        [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", BOUNDARY] dataUsingEncoding:NSUTF8StringEncoding]];
                        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key] dataUsingEncoding:NSUTF8StringEncoding]];
                        [body appendData:[[NSString stringWithFormat:@"%@", value] dataUsingEncoding:NSUTF8StringEncoding]];
}
                    }
                }

                // Close
                [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", BOUNDARY] dataUsingEncoding:NSUTF8StringEncoding]];
            } else {
                NSString* querystring = [UNIHTTPClientHelper dictionaryToQuerystring:parameters];
                body = [NSMutableData dataWithData:[querystring dataUsingEncoding:NSUTF8StringEncoding]];

                [headers setValue:@"application/x-www-form-urlencoded" forKey:@"content-type"];
            }

[Josnic]

Regards.

For multipart form data, I use a simple solution (a better solution is welcome). In the same file, I added:

@interface UNIHTTPClientHelper()
+ (NSString*) encodeURI:(NSString*)value;
+ (NSString*) dictionaryToQuerystring:(NSDictionary*) parameters;
+ (BOOL) hasBinaryParameters:(NSDictionary*) parameters;
+ (BOOL) hasMultipartFormDataHeader:(NSDictionary*) headers;
+ (NSMutableURLRequest*) prepareRequest:(UNIHTTPRequest*) request;
+ (UNIHTTPResponse*) getResponse:(NSURLResponse*) response data:(NSData*) data;
@end

@implementation UNIHTTPClientHelper

+ (BOOL) hasBinaryParameters:(NSDictionary*) parameters {
    for(id key in parameters) {
        id value = [parameters objectForKey:key];
        if ([value isKindOfClass:[NSURL class]]) {
            return true;
        }
    }
    return false;
}

+ (BOOL) hasMultipartFormDataHeader:(NSDictionary*) headers {
    for(id key in headers) {
        id value = [headers objectForKey:key];
        if ([[value lowercaseString] compare:@"multipart/form-data" options:NSCaseInsensitiveSearch] == NSOrderedSame
            &&
        [[key lowercaseString] compare:@"content-type" options:NSCaseInsensitiveSearch] == NSOrderedSame ){
            return true;
        }
    }
    return false;
}

This check the request headers searching a content-type with multipart/form-data. After, I implemented here:

And now, with this configuration, I I was able to use a request with multipart, only adding the header in the request:

I hope that can be util for more devs that using this awesome library.