我正在使用 NSURLConnection 和 NSURLRequest 将一些 XML 数据的 HTTP POST 发送到服务器。
但是，服务器无法在 HTTP 正文中找到数据，因为它已被打包，假设网页正在执行表单提交（参数 = form-urlencoded 正在设置，可能默认情况下由 NSURLConnection 设置？）。
这不是我明确要做的事情，我只是使用以下方法添加正文数据：
[request setHTTPBody: [body dataUsingEncoding:NSUTF8StringEncoding]];
如何停止/覆盖此行为？
我不知道默认值，但您可以更改它：
[request setValue:@"application/x-www-form-urlencoded charset=utf-8" forHTTPHeaderField:@"Content-Type"];
看看文档。
在这里，我在 Web 服务器上发布 XML 数据并使用 NSURLConnection 获取 xml 响应。步骤如下：
1) 通过 NSURLConnection 异步请求在服务器上发布数据
NSMutableString *productDetailString =[[NSMutableString alloc] init];
[productDetailString appendString:@"<product>"];
[productDetailString appendFormat:@"<product_name>%@</product_name>",name];
[productDetailString appendString:@"<product_id>1024</product_id>"];
[productDetailString appendString:@"</product>"];
NSString *message=[[NSString alloc] initWithFormat:@"_xmlrequestPostage=%@",productDetailString];
// NSString *message=[[NSString alloc] initWithFormat:@"_xmlrequestPostage="
// "<product>\n"
// "<product_name>%@</product_name>\n"
// "<product_id>%@</product_id>\n"
// "</product>\n",name, id];
NSString *urlString = [NSString stringWithFormat:@"http://flightsflights.com.au/Mega/product.asmx/GetProductPrice"];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];
//set headers
NSString *contentType = [NSString stringWithFormat:@"application/x-www-form-urlencoded"];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
[request addValue:[NSString stringWithFormat:@"%d",[message length]] forHTTPHeaderField:@"Content-Length"];
//create the body
NSMutableData *postBody = [[NSMutableData alloc]initWithData:[[NSString stringWithFormat:@"%@",message] dataUsingEncoding:NSUTF8StringEncoding]];
//post
[request setHTTPBody:postBody];
//get response
NSURLConnection *connection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
if(connection)
{
webData=[[NSMutableData data] retain];
}
else
{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Mega Australia" message:@"Problem in network." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
[alert show];
[alert release];
}
2) 通知 NSURLConnection 类的代表
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[webData setLength: 0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Error" message:@"ERROR with conenction " delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
[alert show];
[alert release];
[connection release];
[webData release];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
if(webData==nil)
{
UIAlertView *thealert=[[UIAlertView alloc] initWithTitle:@"Error" message:@"No data found." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
[thealert show];
[thealert release];
}
else
{
NSString *str=[[NSString alloc] initWithData:webData encoding:NSUTF8StringEncoding];
str=[str stringByReplacingOccurrencesOfString:@"<" withString:@"<"];
str=[str stringByReplacingOccurrencesOfString:@">" withString:@">"];
NSData *data=[str dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
product=[[NSMutableArray alloc] init];
NSXMLParser *xmlParser=[[NSXMLParser alloc] initWithData:data];
xmlParser.delegate=self;
[xmlParser parse];
webData=nil;
[webData release];
}
}
3) 在 .h 文件中添加以下变量： { NSMutableData *webData; NSMutableDictionary *aProduct; NSMutableArray *产品；
NSMutableString *name, *pro_id, *currentElement, *statusCode;
}
@property (retain, nonatomic) NSMutableString *name;
@property (retain, nonatomic) NSMutableString *pro_id;
@property (retain, nonatomic) NSMutableString *statusCode;
4) .m 文件中的综合名称、pro_id 和 statusCode
5) 通知 NSXMLParse 类的代表
-(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
currentElement=[elementName copy];
if([elementName isEqualToString:@"product"])
{
self.name=[[NSMutableString alloc] init];
self.pro_id=[[NSMutableString alloc] init];
aProduct=[[NSMutableDictionary alloc] init];
}
else if([elementName isEqualToString:@"status"])
{
self.statusCode=[[NSMutableString alloc] init];
}
}
-(void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
if([currentElement isEqualToString:@"product_name"])
{
[self.name appendString:string];
}
else if([currentElement isEqualToString:@"product_id"])
{
[self.pro_id appendString:string];
}
else if([currentElement isEqualToString:@"status"])
{
[self.statusCode appendString:string];
if(![self.statusCode isEqualToString:@"200"])
{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Mega Australia" message:@"Input string is not in a correct format." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
[alert show];
[alert release];
return;
}
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if ([elementName isEqualToString:@"product"])
{
[aProduct setObject:self.name forKey:@"name"];
[aProduct setObject:self.pro_id forKey:@"id"];
[product addObject:[aProduct copy]];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
return;
}