NSURLRequest 导致 500 错误

Question

我正在尝试使用 NSURL 请求进行 api 调用以上传图像，但我继续收到 500 错误。为了向您展示我在这里尝试完成的是 curl 命令的样子。

$ curl -i -F api_password=<YOUR_API_PASSWORD> -F file=@<LOCAL_FILE_PATH> https://upload.api.com/

这是我到目前为止的内容，并且我继续收到 500 个错误。你们能告诉我我做错了什么吗（我不是 NSURLRequest 大师）。

NSString *apiPass = @"apiKey";
NSString *filePath = imagePath;

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"https://upload.wistia.com"]];
[request setHTTPMethod:@"POST"];

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

// Create data string
NSString *dataString = [NSString stringWithFormat:@"api_password=%@&file=@%@", apiPass, filePath];

NSData *postData = [dataString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];

[request setHTTPBody:[dataString dataUsingEncoding:NSUTF8StringEncoding]];

NSURLResponse * response = nil;
NSError * error = nil;

[NSURLConnection sendSynchronousRequest:request
                      returningResponse:&response
                                  error:&error];

Answer 1

尝试编写类似这样的 POST 请求：

NSString *boundary = @"---###-----##----##--#----###---BOUNDARY---###";
NSMutableData *postBody = [NSMutableData data];
NSString *postString = nil;

postString = [NSString stringWithFormat:@"\r\n--%@\r\n", boundary];
postString = [postString stringByAppendingString:@"Content-Disposition: form-data; name=\"api_password\"\r\n\r\n"];
postString = [postString stringByAppendingString:apiPass];

postString = [postString stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n", boundary]];
postString = [postString stringByAppendingString:@"Content-Disposition: form-data; name=\"file\"\r\n\r\n"];
postString = [postString stringByAppendingString:filePath];

postString = [postString stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary]];

[postBody appendData:[postString dataUsingEncoding:NSUTF8StringEncoding]];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://upload.wistia.com"] 
                                                       cachePolicy:NSURLRequestReturnCacheDataElseLoad
                                                   timeoutInterval:60.0f];
[request setHTTPMethod:@"POST"];    

[request setValue:@"*/*" forHTTPHeaderField:@"Accept"];   
[request setValue:[@"multipart/form-data; boundary=" stringByAppendingString:boundary] forHTTPHeaderField:@"Content-Type"];
[request setValue:[NSString stringWithFormat:@"%d", postBody.length] forHTTPHeaderField:@"Content-Length"];

[request setHTTPBody:postBody];

Answer 2

当我想将“photo.jpg”上传到某个服务器时，我使用如下代码：

UIImage *image = [UIImage imageNamed:@"photo.jpg"];

NSData *imageData = UIImageJPEGRepresentation(image, 1.0f);

NSMutableData *body = [NSMutableData data];

[body appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: form-data; name=\"photo\"; filename=\"photo.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: image/jpg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:imageData];
[body appendData:[[NSString stringWithFormat:@"%@", endItemBoundary] dataUsingEncoding:NSUTF8StringEncoding]];

[request setHTTPBody:body];

在这种情况下，图像的数据表示将被 ipload 而不是链接到图像。 你可以试试这样的。

Answer 3

谷歌搜索“错误 500”。这是“内部服务器错误”。这是服务器上的错误。除了向服务器人员发送电子邮件之外，您无能为力。