如何通过HTTP发送数据字节到.NET服务器

将表单的enctype设置为“multipart / form-data”会导致web服务抛出exception。

System.InvalidOperationException：请求格式无效：multipart / form-data; 边界= —…..

我需要将HTML表单直接发布到web服务，而不能由.NET服务器托pipe。

任何想法…

提前致谢。

Answer 1

请参阅RFC 1867以了解多部分协议的含义。 你需要手工制作多部分“装饰”，这个代码可能有助于：

-(NSData *)makeMultipartDataWithBoundary:(NSString *) boundary parameters:(NSDictionary *)parameters formName:(NSString *)formName fileName:(NSString *)fileName fileType:(NSString *)fileType fileData:(NSData*)fileData { NSMutableString * res = [NSMutableString stringWithFormat:@"--%@\r\n", boundary]; for(NSString * key in [parameters allKeys]){ NSString * value = [parameters objectForKey:key]; if(![value isMemberOfClass:[NSString class]]) continue; [res appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n", key]; [res appendFormat:@"\r\n%@\r\n", value]; [res appendFormat:@"--%@\r\n", boundary]; } [res appendFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", formName, fileName]; [res appendFormat:@"Content-Type: %@\r\n\r\n", fileType]; NSMutableData * data= [NSMutableData data]; NSLog(@"%@", res); [data appendData:[res dataUsingEncoding:NSUTF8StringEncoding]]; [data appendData:fileData]; [data appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; return data; } 

哪里：

边界是一个NSString（字节序列），不会出现在fileData部分。 例如'D33pN16h7abcd'

参数是包含所有要传递给多部分协议的头部参数的字典。

formName是一个标识符。

fileType是mime文件types，例如'image / png'

最后fileData是文件内容的字节数。

接下来的几行显示了一个例子来调用这个方法：

 - (void) sendAllData { NSData *data; data = [self makeMultipartDataWithBoundary:kBoundary parameters:nil formName:@"imageField" fileName:@"imageExample.png" fileType:@"image/png" fileData:self.imageData]; // Make a post NSURLConnection request with the data NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.example.org/file.php"] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60.0]; [request setHTTPMethod:@"POST"]; [request setHTTPBody:data]; [request addValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", kBoundary] forHTTPHeaderField:@"Content-Type"] NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; if (connection) { receivedData = [[NSMutableData data] retain]; } } 

希望这可以帮助！ 🙂

Answer 2

通过使用SOAP服务解决。 最终工作代码如下：

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

 NSData *imageDataToSend = [[NSData alloc] initWithData:UIImageJPEGRepresentation(previewImageView_.image, 90)]; NSString *imgegeDataStr = [imageDataToSend base64EncodedString]; NSString *soapMsg = [[NSString alloc] initWithFormat:@"<?xml version=\"1.0\" encoding=\"utf-8\"?><soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"><soap:Body><SaveCampaignImage xmlns=\"http://tempuri.org/\"><CampaignImage>%@</CampaignImage><ImageName>image1</ImageName><CampaignID>4</CampaignID></SaveCampaignImage></soap:Body></soap:Envelope>",imgegeDataStr]; NSLog(@"soapMsg"); NSURL *url = [NSURL URLWithString:@"http://10.4.3.224/VerizonDealsWebService/Service1.asmx"]; NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url]; NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMsg length]]; [req addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"]; [req addValue:@"http://tempuri.org/SaveCampaignImage" forHTTPHeaderField:@"SOAPAction"]; [req addValue:msgLength forHTTPHeaderField:@"Content-Length"]; [req setHTTPMethod:@"POST"]; [req setHTTPBody: [soapMsg dataUsingEncoding:NSUTF8StringEncoding]]; NSURLConnection *connection_ = [[NSURLConnection alloc] initWithRequest:req delegate:self]; [connection_ start]; [connection_ release]; [pool release];