将图像上传到ios中的Web服务

Posted 2023-02-24

【中文标题】将图像上传到ios中的Web服务

【英文标题】：Upload image to web service in ios

【发布时间】：2013-12-10 07:08:27

【问题描述】：

我尝试AFNetworking 的“创建上传任务”和this 将图像上传到.net 服务器，但不能。这是我尝试过的。

- (void)uploadJPEGImage:(NSString*)requestURL image:(UIImage*)image

    NSURL *url = [[NSURL alloc] initWithString:requestURL];
    NSMutableURLRequest *urequest = [NSMutableURLRequest requestWithURL:url];

    [urequest setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
    [urequest setHTTPShouldHandleCookies:NO];
    [urequest setTimeoutInterval:60];
    [urequest setHTTPMethod:@"POST"];

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

    NSMutableData *body = [NSMutableData data];
    // add image data
    NSData *imageData = UIImageJPEGRepresentation(qrCodeImage.image, 1.0);
    if (imageData) 
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        //[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", pictureName] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:imageData];
        [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    

    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [urequest setHTTPBody:body];
    NSLog(@"Check response if image was uploaded after this log");
    //return and test
    NSData *returnData = [NSURLConnection sendSynchronousRequest:urequest returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"%@", returnString);

由于AFNetworking代码给出，我this尽管添加了运行时错误

self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"application/xml", @"text/xml", @"text/html", nil];

谢谢。

【问题讨论】：

代码中有一行注释掉了，它在数据中添加了Content-Disposition 行。您在执行多部分帖子时需要它，因此请取消注释。

我把它注释掉了，因为我已经在应用程序本身中生成了二维码，因此图像不会有任何路径。

您需要在多部分有效负载中包含该行。这很关键。该行中的 name 值是参数名称，而不是文件路径，例如image 或 photo.

我添加了imageView.image而不是pictureName，但是得到了网页的html响应。我如何检查图像是否上传到提到的 url，因为我期待 "imageurl":"trivetts.iconnectgroup.com/uploads/TruckTrackUpload/…" 响应

Content-Disposition 行需要读作[body appendData:[@"Content-Disposition: form-data; name=\"FileUpload1\" filename=\"image.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

【参考方案1】：

您的代码缺少 __VIEWSTATE 内容标准。我在代码中添加了最后提取上传图片的 URL：

- (void)uploadJPEGImage:(NSString*)requestURL image:(UIImage*)image

    NSURL *url = [[NSURL alloc] initWithString:requestURL];
    NSMutableURLRequest *urequest = [NSMutableURLRequest requestWithURL:url];

    [urequest setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
    [urequest setHTTPShouldHandleCookies:NO];
    [urequest setTimeoutInterval:60];
    [urequest setHTTPMethod:@"POST"];

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

    NSMutableData *body = [NSMutableData data];

    // Add __VIEWSTATE
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Disposition: form-data; name=\"__VIEWSTATE\"\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"/wEPDwUKLTQwMjY2MDA0M2RkXtxyHItfb0ALigfUBOEHb/mYssynfUoTDJNZt/K8pDs=" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    // add image data
    NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
    if (imageData) 
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Disposition: form-data; name=\"FileUpload1\"; filename=\"image.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:imageData];
        [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    

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

    [urequest setHTTPBody:body];
    NSLog(@"Check response if image was uploaded after this log");
    //return and test
    NSHTTPURLResponse *response = nil;
    NSData *returnData = [NSURLConnection sendSynchronousRequest:urequest returningResponse:&response error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"%@", returnString);

    // Extract the imageurl
    NSArray *parts = [returnString componentsSeparatedByString:@"\r\n"];
    if (parts.count > 0) 
        NSError *error = NULL;
        NSDictionary *result = [NSJSONSerialization JSONObjectWithData:[parts[0] dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingAllowFragments error:&error];
        NSLog(@"%@", result[@"imageurl"]); // Will either be nil or a URL string
    

【参考方案2】：

1.我想你错过了上传页面中的隐藏输入：

2.使用下面的代码，我可以成功上传并得到正确的响应字符串：

UIImage *image = [UIImage imageNamed:@"a.jpg"];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer new];

// add hidden parameter here
NSDictionary * parameters = @@"__VIEWSTATE":@"/wEPDwUKLTQwMjY2MDA0M2RkXtxyHItfb0ALigfUBOEHb/mYssynfUoTDJNZt/K8pDs=";

[manager POST:@"http://cnapi.iconnectgroup.com/upload/fileuploadnew.aspx" parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) 
    // add image date here
    [formData appendPartWithFileData:UIImageJPEGRepresentation(image, 0.5) name:@"FileUpload1" fileName:@"avatar.jpg" mimeType:@"image/jpeg"];

 success:^(AFHTTPRequestOperation *operation, id responseObject) 
    NSData * data = (NSData *)responseObject;
    NSLog(@"Success,Response string: %@", [NSString stringWithCString:[data bytes] encoding:NSISOLatin1StringEncoding]);
 failure:^(AFHTTPRequestOperation *operation, NSError *error) 
    NSLog(@"Error: %@", error);
];