使用 API URL 将图像发送到 Web 服务

Question

我正在尝试使用 Bufferapp API 自动为社交网络创建一些缓冲区并让它们在自动时间发布。

我需要使用他们的 API，特别是 this method，在我的帖子中发送图片和文本。我几乎都想通了，但我想不出使用此 API 发送图像的正确方法。

我用谷歌搜索了一下，但我似乎无法找到一种方法来做到这一点。我见过的所有示例都通过 POST 发送整个图像，但它们似乎没有使用 API 格式。

换句话说，我怎么能做到这样？

https://webservice.com/api/send_post?access_token=123&text=huehuehue&image=__

编辑：我没有附加任何源代码，因为我不知道如何处理 NSImage 的“转换”为可以使用 API URL 发送的东西，但这是我正在尝试的代码生成：

NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[queue addOperationWithBlock:^{
    NSURL *create = [NSURL URLWithString:[NSString stringWithFormat:@"https://api.bufferapp.com/1/updates/create.json?access_token=%@", kToken, nil]];
    NSString *text = @"text=%23Anime"; //Encoding so this is #Anime
    NSString *now = @"now=0";

    //Somehow add an NSImage to the http body.
}];

Answer 1

我设法调整了这个现有的问题：

Objective C: How to upload image and text using HTTP POST?

使用如下代码（急需美化）：

NSURL *create = [NSURL URLWithString:[NSString stringWithFormat:@"https://api.bufferapp.com/1/updates/create.json?access_token=%@", kToken, nil]];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:create];
request.HTTPMethod = @"POST";

NSString *text = @"#Anime\r\n\r\>> Download Mignori: http://lnrs.me/mignori";
NSString *now = @"0";
NSString *shorten = @"0";

NSImage *image = [[NSImage alloc] initWithContentsOfFile:self.folders[0]];

NSData *imageData = [NSData dataWithContentsOfFile:self.folders[0]];

NSMutableData *body = [NSMutableData data];

NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

//File
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Disposition: attachment; name=\"media[picture]\"; filename=\".jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"text\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:text] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"now\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:now] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"shorten\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:shorten] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"profile_ids[]\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"52e99e2b2846b29e18000020"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

request.HTTPBody = body;

//return and test
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];