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我正在开发一个应用程序，我想将图像直接保存在服务器路径上。我正在使用下面的代码，但它没有在该路径上保存图像。来自服务器的响应是 NUll，而不是在服务器路径中保存图像

NSData *imageData = UIImageJPEGRepresentation(image, 90);
// setting up the URL to post to
NSString *urlString = @"http://192.0.168.109/Mobile_tutor/webservice/images/questions/";

// setting up the request object now
request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

/*
 add some header info now
 we always need a boundary when we post a file
 also we need to set the content type

 You might want to generate a random boundary.. this is just the same
 as my output from wireshark on a valid html post
 */
NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

/*
 now lets create the body of the post
 */
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"ipodfile.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 stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];

// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(@"--response string -%@",returnString);
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1 回答 1

7

您可以使用 AFNetworking，因此您不必深入研究多部分请求格式。

AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:@"http://192.0.168.109"]];
NSDictionary *simpleParams = @{ @"key": @"value" };
NSMutableURLRequest* request = [client multipartFormRequestWithMethod:@"POST" path:@"/Mobile_tutor/webservice/images/questions/" parameters: simpleParams constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

        [formData appendPartWithFileData:fileData
                                    name:@"paramName"
                                fileName:@"filename.png"
                                mimeType:@"image/png"];
    }];

然后根据预期的响应创建一个操作。例如，如果您期望 JSON：

AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {

    // handle success

} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {

    // handle error

}];

您可以在AFNetworking 文档中获得更多信息。

于 2013-11-02T18:39:04.973 回答