Http Post Request [英] Http Post Request
本文介绍了Http Post Request的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何使用JSON制作Http Post Request。我尝试了Internet上可用的每个选项。但是无法获取数据。所以请发布完整的代码来提出请求。
How to make Http Post Request using JSON. I tried every option which is available on Internet.But could not get the Data. So please post entire code to make a request.
推荐答案
您可以使用以下代码:
-(void)performRequest{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"url"]];
NSString *msgLength = [NSString stringWithFormat:@"%d", [jsonMessage length]];
[request addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
[request addValue: jsonAction forHTTPHeaderField:@"JSONAction"];
[request addValue: msgLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPMethod:@"POST"];
[request setHTTPBody: [jsonMessage dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
if( theConnection )
{
webData = [[NSMutableData data] retain];
}
else
{
NSLog(@"theConnection is NULL");
}
[pool release];
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
[webData setLength: 0];
self.resultArray = [[NSMutableArray alloc] init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
NSLog(@"ERROR with theConenction");
NSDictionary *errorDic = [NSDictionary dictionaryWithObject:error forKey:@"error"];
[self.resultArray addObject:errorDic];
[connection release];
[webData setLength:0];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSLog(@"DONE. Received Bytes: %d", [webData length]);
NSString *theXML = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding];
NSLog(@"%@", theXML);
[theXML release];
if([webData length] > 0){
parser = [[NSXMLParser alloc] initWithData:webData];
[parser setDelegate:self];
[parser parse];
}
}
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