Question

我想通过将图片转换为base 64和UIImage来将NSData上传到.Net服务器。但我得到的响应为null。这是我的代码。

NSString *base64Encoded = [imageData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
NSString *post= [NSString stringWithFormat:@"myServerSideUrl?Image=%@",base64Encoded];

NSLog(@"PostData: %@",post);

NSString* webStringURL = [post stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];

NSURL* url = [NSURL URLWithString:webStringURL];

NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
NSError *error;
NSHTTPURLResponse *response = nil;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSData *responseData = [[NSData alloc]initWithData:urlData];

if ([response statusCode] >=200 )
{
    NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData: responseData options:0 error:nil];

    NSLog(@"%@",jsonData);
}

过了一段时间，我刚刚检查邮递员显示的网址太长HttpResponseCode：414。此外，我尝试使用AFNetwork以NSData格式发送图像，获得相同的响应。我只是用Google搜索了这个，就像发送基本64字符串一样。当我尝试在体内发送图像时，服务器端无法获取图像。他们正在创建像GET方法的API，但实际的方法是POST。有没有其他解决方案。有什么建议。

Answer 1

您正在将NSData设置为您的请求正文，而不定义任何键值对。

使用AFNetworking尝试此代码...

- (void) uploadFileRequestWithHttpHeaders:(NSMutableDictionary*) headers
                          withServiceName:(NSString*) serviceName
                           withParameters:(NSMutableDictionary*) params
                             withFileData:(NSArray*) files
{

    NSString *serviceUrl = [httpBaseURL stringByAppendingPathComponent:serviceName];

    if (headers == nil)
    {
        NSDictionary *headers = [[NSDictionary alloc] initWithObjectsAndKeys:@"multipart/form-data",@"Content-Type",nil];
        [self setHeaders:headers];
    }
    else
    {
        [headers setObject:@"multipart/form-data" forKey:@"Content-Type"];
        [self setHeaders:headers];
    }

    [httpSessionManager POST:serviceUrl
                  parameters:params
   constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

       for (NSData *fileData in files)
       {
           [formData appendPartWithFileData:fileData name:@"userProfileImg" fileName:@"profile_pic.jpg" mimeType:@"image/jpeg"];
       }
   }
                     success:^(NSURLSessionDataTask *task, id responseObject) {

                         if (success != nil)
                     }
                     failure:^(NSURLSessionDataTask *task, NSError *error) {

                         if (failure != nil)
                     }];
}


- (void) setHeaders:(NSDictionary*) headers
{
    if (headers != nil)
    {
        NSArray *allHeaders = [headers allKeys];

        for (NSString *key in allHeaders)
        {
            [httpSessionManager.requestSerializer setValue:[headers objectForKey:key] forHTTPHeaderField:key];
        }
    }
}

- (void) addQueryStringWithParams:(NSDictionary*) params
{
    [httpSessionManager.requestSerializer setQueryStringSerializationWithBlock:^NSString *(NSURLRequest *request, NSDictionary *parameters, NSError *__autoreleasing *error) {
        __block NSMutableString *query = [NSMutableString stringWithString:@""];

        NSError *err;
        NSData *jsonData = [NSJSONSerialization  dataWithJSONObject:params options:0 error:&err];
        NSMutableString *jsonString = [[NSMutableString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

        query = jsonString;

        return query;
    }];
}

并像这样调用这个方法..

NSArray *objects = [NSArray arrayWithObjects:@"multipart/form-data",@"1.0",@"ios",token, nil];
NSArray *Keys = [NSArray arrayWithObjects:@"content-type",@"version",@"os",@"token", nil];
NSMutableDictionary *headers = [[NSMutableDictionary alloc]initWithObjects:objects forKeys:Keys];

 NSMutableDictionary *paraDic = [[NSMutableDictionary alloc] init];
 [paraDic setObject:self.userNameField.text forKey:@"name"];
NSData *    userProfileImg = UIImageJPEGRepresentation(image, 0.8f);
imageDataArray = [NSArray arrayWithObjects:userProfileImg, nil];


[self uploadFileRequestWithHttpHeaders:headers withServiceName:@"updateProfile" withParameters:params withFileData:files];

Answer 2

您可以使用NSURLSession -

尝试此代码

- (void)postRequestForSubmitDataToServer {


    //Put your action URL
    NSURL *aUrl = [NSURL URLWithString:@"action_url.php?&attachment=att&submit=submit"];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:aUrl
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:60.0];
    [request setHTTPMethod:@"POST"];

    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
    NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
        if(error == nil) {
            //change JSON type according to ur need.
            NSArray *JSON = [NSJSONSerialization JSONObjectWithData:data options: NSJSONReadingMutableContainers error: &error];
            NSLog(@"Data = %@",JSON);

        } else {
            NSLog(@"%@", error);
        }

    }];

    [postDataTask resume];
}

我的表单数据 -

<form action="action_url.php" method="post" enctype="multipart/form-data">
Your Photo: <input type="file" name="attachment" size="25" /><br>
<input type="submit" name="submit" value="Submit" /> </form>

使用POST方法将代码上传到.net服务器

2 个答案: