从 iPhone 应用程序上传图像

Question

我正在尝试从 iPhone 应用程序将图像上传到服务器

，用于上传图像的 PHP 代码如下

if(isset($_POST['insertImage']))
{                   //INSERT IMAGE -------------------
     $method=safeData($_POST['insertImage']);
    if($method=='true')
    {
        if(isset($_POST['userId']))
        {

            if(isset($_FILES['imageFile']))
            {

            if($_FILES['imageFile']['type']=="image/gif" || $_FILES['imageFile']['type']=="image/bmp" || $_FILES['imageFile']['type']=='image/jpeg' || $_FILES['imageFile']['type']=='image/jpg' || $_FILES['imageFile']['type']=='image/png')
            {
                if($_FILES['imageFile']['size']<=5250000)
                {
                                                                                $userId=safeData($_POST['userId']);
                    $newImgName=rand()."a".time().".".findexts($_FILES["imageFile"]["name"]);                       imgPath="./../admin/images/";
                    move_uploaded_file($_FILES['imageFile']['tmp_name'],$imgPath.$newImgName);
                    $data.=saveImageInfo($userId,$newImgName);  
                }
                    else
                {
                  $data.="<List><ResponseCode>405</ResponseCode><Message>Maximum image size should not be more than 5mb </List>";   
                }
            }
            else
            {
                $data.="<List><ResponseCode>405</ResponseCode><Message>Invalid image format. only png,jpg,bmp formats supported</Message></List>";                                                      }
            }
            else
            {
                $data.="<List><ResponseCode>405</ResponseCode><Message>imageFile method not found</Message></List>";             
            }
                                                                    }
        else
        {
            $data.="<List><ResponseCode>405</ResponseCode><Message>userId method not found</Message></List>";   
        }
    }
    else
    {
        $data.="<List><ResponseCode>405</ResponseCode><Message>invalid insertImage argument</Message></List>";              
    }
}

，我使用以下代码从上面的代码将图像上传到服务器

+(NSData *)setUserImage:(NSData *)userImageData UserId:(int)UserId
{
    NSString *result;
    NSData *responseData;
    @try {
        NSURL *url = [[NSURL alloc] initWithString:webAddress]; 
        NSMutableURLRequest *req = [[NSMutableURLRequest alloc] initWithURL:url];
        [req setHTTPMethod:@"POST"];

        [req setValue:@"multipart/form-data; boundary=*****" forHTTPHeaderField:@"Content-Type"];//

        NSMutableData *postBody = [NSMutableData data];
        NSString *stringBoundary = [NSString stringWithString:@"*****"];

        [postBody appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"insertImage\"\r\n\r\n"] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithFormat:@"true"] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];


        [postBody appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userId\"\r\n\r\n"] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithFormat:@"%d",UserId] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];

        [postBody appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"imageFile\"; filename=\"myimagefile.png\"\r\n\r\n"] dataUsingEncoding:NSASCIIStringEncoding]];

        //[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"imageFile\"; filename=\"myimagefile.png\"\r\n\r\n"] dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[NSData dataWithData:userImageData]];// dataUsingEncoding:NSASCIIStringEncoding]];
        [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];

        [req setHTTPBody: postBody];//putParams];   

        NSHTTPURLResponse* response = nil;  
        NSError* error = [[[NSError alloc] init] autorelease];  

        responseData = [NSURLConnection sendSynchronousRequest:req returningResponse:&response error:&error];  
        result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
        if(isInDebugMode)
            NSLog(@"Result: %@", result);

        [url release];
        [req release];

        IceCreamManFinderAppDelegate *delegate1=(IceCreamManFinderAppDelegate *)[UIApplication sharedApplication].delegate;
        if(error.domain!=nil)
        {
            NSString *errorDesc=[[error userInfo] objectForKey:@"NSLocalizedDescription"];
            delegate1.globalErrorMessage=errorDesc;
            return nil;
        }
        else
        {
            delegate1.globalErrorMessage=nil;
        }
    }
    @catch (NSException* ex) {
        NSLog(@"Error: %@",ex);
    }
    return responseData;
}

，我从服务器得到以下响应

图像格式无效。只有 png、jpg、bmp 格式

我尝试了很多但没有成功。

请指出我哪里错了？

Answer 1

您编写的服务器代码仅接受具有某些指定内容类型的数据，但您从未将内容类型添加到数据中。只需为您的图像数据发出正确的内容类型：

// Emit the content type here as well
[postBody appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"imageFile\"; filename=\"myimagefile.png\"\r\nContent-Type: image/png\r\n\r\n"] dataUsingEncoding:NSASCIIStringEncoding]];

[postBody appendData:[NSData dataWithData:userImageData]];
[postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSASCIIStringEncoding]];

错误实际上是从您自己的服务器响应返回的，因此只需遵循服务器代码上的控制流程即可找到原因。