Question

我正在尝试使用发布请求上传文件，但我无法附加任何其他变量。这是代码：

NSMutableURLRequest *urlRequest =
      [NSMutableURLRequest requestWithURL:url];
   [urlRequest setHTTPMethod:@"POST"];
   [urlRequest setValue:
      [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundry]
      forHTTPHeaderField:@"Content-Type"];

NSString *post = @"key1=val1&key2=val2";
NSData *postVars = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];


   NSMutableData *postData =
      [NSMutableData dataWithCapacity:[data length]+[postVars length] + 512];
    [postData appendData:postVars];
   [postData appendData:
      [[NSString stringWithFormat:@"--%@\r\n", boundry] dataUsingEncoding:NSUTF8StringEncoding]];
   [postData appendData:
      [[NSString stringWithFormat:
        @"Content-Disposition: form-data; name=\"%@\"; filename=\"test.bin\"\r\n\r\n", FORM_FLE_INPUT]
       dataUsingEncoding:NSUTF8StringEncoding]];
   [postData appendData:data];
   [postData appendData:
      [[NSString stringWithFormat:@"\r\n--%@--\r\n", boundry] dataUsingEncoding:NSUTF8StringEncoding]];

   [urlRequest setHTTPBody:postData];

Answer 1

在服务器端，他必须编写接受变量的代码。

Answer 2

它可能对您有用。

NSString *post = @"key1=val1&key2=val2";
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:@"http://www.nowhere.com/sendFormHere.php"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];

Answer 3

好吧，我找到了答案，你需要在一个单独的边界之间提供每个变量，如下所示：

-----------------------------153930311422 
Content-Disposition: form-data; name="var1" 
value1
 -----------------------------153930311422

所以这是Objective-c实现：

SString *boundary = [NSString stringWithString:@"-----------------------------153930311422 "];

NSMutableURLRequest *urlRequest =[NSMutableURLRequest requestWithURL:url];
[urlRequest setHTTPMethod:@"POST"];
[urlRequest setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundry]   forHTTPHeaderField:@"Content-Type"];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=var1 \r\n\r\n %@ \r\n\r\n",value1] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

发送除文件数据之外的一些变量

3 个答案: