(Objective-C) Facebook Upload Photo from Local File

Uploads a new photo with a caption from a local file.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoHttp.h>
#import <CkoHttpRequest.h>
#import <CkoHttpResponse.h>
#import <NSString.h>

// This example assumes Chilkat HTTP to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoHttp *http = [[CkoHttp alloc] init];

CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
req.HttpVerb = @"POST";
req.ContentType = @"multipart/form-data";
req.Path = @"/v2.7/me/photos";

// Use the previously obtained access token.
// Note: The publish_actions scope is required to upload a photo.
[req AddHeader: @"Authorization" value: @"Bearer FACEBOOK-ACCESS-TOKEN"];

// Send an "Expect: 100-continue" header in the request.
// This causes the HTTP server to end a 100-continue response
// immediately after receiving the HTTP header.  The client
// (Chilkat) will receive this intermediate response, and if
// it's not an error response, it knows that the HTTP server will
// accept the data that is forthcoming.
// The alternative is to get an error response after trying to upload
// the entire contents of the files.
[req AddHeader: @"Expect" value: @"100-continue"];

// Set a photo caption.
[req AddParam: @"caption" value: @"Here are some penguins!"];

// Additional parameters can be added to the request by 
// calling AddParam once per parameter.  
// See https://developers.facebook.com/docs/graph-api/reference/user/photos
// for more information about other optional parameters.

// Indicate the local file to be uploaded.
BOOL success = [req AddFileForUpload: @"source" path: @"qa_data/jpg/penguins2.jpg"];
if (success != YES) {
    NSLog(@"%@",req.LastErrorText);
    return;
}

// Upload the image file..
CkoHttpResponse *resp = [http SynchronousRequest: @"graph.facebook.com" port: [NSNumber numberWithInt: 443] ssl: YES req: req];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

// Examine the response body:
NSString *responseJson = resp.BodyStr;
NSLog(@"%@",responseJson);

// The response contains JSON, such as this:
// {"id":"10210224963435862","post_id":"10224048320139890_10210224963435862"}